Add pkg-config support

Signed-off-by: Laurent Bercot <ska@appnovation.com>

13 files changed, 328 insertions, 87 deletions

diff --git a/.gitignore b/.gitignore
index 4fb2d9b..5926be4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 *.o
 *.lo
+/*.pc
 /config.mak
 /src/include/nsss/config.h
 /libnsss.a.xyzzy
diff --git a/INSTALL b/INSTALL
index 363b5e0..b5c8ab6 100644
--- a/INSTALL
+++ b/INSTALL
@@ -8,7 +8,7 @@ Build Instructions
   - GNU make version 3.81 or later
   - skalibs version 2.14.4.0 or later: https://skarnet.org/software/skalibs/
   - To run the test suite and the nsssd-* programs:
-      s6 version 2.13.1.1 or later: https://skarnet.org/software/s6/
+      s6 version 2.13.2.0 or later: https://skarnet.org/software/s6/
 
  This software will run on any operating system that implements
 POSIX.1-2008, available at:
@@ -29,6 +29,33 @@ POSIX.1-2008, available at:
 off them.
 
 
+* pkg-config
+  ----------
+
+ pkg-config is a tool used by some Linux and BSD distributions, providing
+a registry to store policy information about libraries exported by a
+software package; that is supposed to make it easier to build software
+depending on these libraries, by having a tool to automatically extract
+the various flags to pass to the compiler and linker in order to correctly
+build against these libraries.
+ This package supports pkg-config, but you need to explicitly ask for it:
+ - To use the pkg-config tool to *read* information from the registry and
+use it to build *this* package: --with-pkgconfig[=PROG]. This assumes
+PROG supports the pkg-config interface (as the popular pkgconf
+implementation does). If PROG is not supplied, the PKG_CONFIG environment
+variable is used to find the program to use, and if empty/unset, it defaults
+to pkg-config.
+ - To build a .pc file for each library exported by this package, and then
+install it to the pkg-config registry, in other words to *write* information
+so that other software can use pkg-config to build against this package,
+use --enable-pkgconfig.
+
+ pkg-config and slashpackage (see below) configure options can be set
+together, but the slashpackage convention provides its own installation
+policies that generally make it unnecessary to use pkg-config. You
+probably should not mix both.
+
+
 * Customization
   -------------
 
diff --git a/Makefile b/Makefile
index b82361b..752b8ba 100644
--- a/Makefile
+++ b/Makefile
@@ -12,28 +12,65 @@ ifeq "" "$(strip $(filter $(make_need), $(firstword $(sort $(make_need) $(MAKE_V
 fail := $(error Your make ($(MAKE_VERSION)) is too old. You need $(make_need) or newer)
 endif
 
+uniq = $(if $1,$(firstword $1) $(call uniq,$(filter-out $(firstword $1),$1)))
+
 CC = $(error Please use ./configure first)
 
 STATIC_LIBS :=
 SHARED_LIBS :=
 INTERNAL_LIBS :=
 EXTRA_TARGETS :=
+PC_TARGETS :=
 LIB_DEFS :=
+BIN_SYMLINKS :=
+TEST_BINS :=
 
 define library_definition
-LIB$(firstword $(subst =, ,$(1))) := lib$(lastword $(subst =, ,$(1))).$(if $(DO_ALLSTATIC),a,so).xyzzy
+LIB$(1) := lib$(2).$(if $(DO_ALLSTATIC),a,so).xyzzy
 ifdef DO_SHARED
-SHARED_LIBS += lib$(lastword $(subst =, ,$(1))).so.xyzzy
+SHARED_LIBS += lib$(2).so.xyzzy
 endif
 ifdef DO_STATIC
-STATIC_LIBS += lib$(lastword $(subst =, ,$(1))).a.xyzzy
+STATIC_LIBS += lib$(2).a.xyzzy
+endif
+ifdef DO_PKGCONFIG
+PC_TARGETS += lib$(2).pc
 endif
+
+lib$(2).pc:
+	exec env \
+	  library="$(2)" \
+	  includedir="$(includedir)" \
+	  dynlibdir="$(dynlibdir)" \
+	  libdir="$(libdir)" \
+	  extra_includedirs="$(extra_includedirs)" \
+	  extra_libdirs="$(extra_libdirs)" \
+	  extra_libs="$$(strip $$(EXTRA_LIBS))" \
+	  description="$$($(1)_DESCRIPTION)" \
+	  url="$$($(1)_URL)" \
+	  ldlibs="$(LDLIBS)" \
+	  ./tools/gen-dotpc.sh > $$@.tmp
+	exec mv -f $$@.tmp $$@
+
+endef
+
+define binary_installation_rule
+$(DESTDIR)$(1)/$(2): ./$(2) package/modes
+	exec $(INSTALL) -D -m 600 $$< $$@
+	grep -- ^$$(@F) < package/modes | { read name mode owner && \
+	if [ x$$$$owner != x ] ; then chown -- $$$$owner $$@ ; fi && \
+	chmod $$$$mode $$@ ; }
+endef
+
+define symlink_installation_rule
+$(DESTDIR)$(1)/$(2): $(DESTDIR)$(1)/$(SYMLINK_TARGET_$(2))
+	exec $(INSTALL) -l $$(<F) $$@
 endef
 
 -include config.mak
 include package/targets.mak
 
-$(foreach var,$(LIB_DEFS),$(eval $(call library_definition,$(var))))
+$(foreach var,$(LIB_DEFS),$(eval $(call library_definition,$(firstword $(subst =, ,$(var))),$(lastword $(subst =, ,$(var))))))
 
 include package/deps.mak
 
@@ -53,14 +90,18 @@ RANLIB := $(CROSS_COMPILE)ranlib
 STRIP := $(CROSS_COMPILE)strip
 INSTALL := ./tools/install.sh
 
+$(foreach var,$(BIN_TARGETS),$(eval $(call binary_installation_rule,$(bindir),$(var))))
+$(foreach var,$(LIBEXEC_TARGETS),$(eval $(call binary_installation_rule,$(libexecdir),$(var))))
+$(foreach var,$(BIN_SYMLINKS),$(eval $(call symlink_installation_rule,$(bindir),$(var))))
+
 ALL_BINS := $(LIBEXEC_TARGETS) $(BIN_TARGETS)
 ALL_LIBS := $(SHARED_LIBS) $(STATIC_LIBS) $(INTERNAL_LIBS)
 ALL_INCLUDES := $(wildcard src/include/$(package)/*.h)
 
-all: $(ALL_LIBS) $(ALL_BINS) $(ALL_INCLUDES) $(EXTRA_INCLUDES)
+all: $(ALL_LIBS) $(ALL_BINS) $(ALL_INCLUDES) $(EXTRA_INCLUDES) $(PC_TARGETS)
 
 clean:
-	@exec rm -f $(ALL_LIBS) $(ALL_BINS) $(wildcard src/*/*.o src/*/*.lo) $(EXTRA_TARGETS)
+	@exec rm -f $(ALL_LIBS) $(ALL_BINS) $(TEST_BINS) $(wildcard src/*/*.o src/*/*.lo) $(PC_TARGETS) $(EXTRA_TARGETS)
 
 distclean: clean
 	@exec rm -f config.mak src/include/$(package)/config.h
@@ -81,12 +122,19 @@ ifneq ($(strip $(ALL_BINS)$(SHARED_LIBS)),)
 	exec $(STRIP) -R .note -R .comment $(ALL_BINS) $(SHARED_LIBS)
 endif
 
-install: install-dynlib install-libexec install-bin install-lib install-include
+install: install-dynlib install-libexec install-bin install-symlinks install-lib install-include install-pkgconfig
 install-dynlib: $(SHARED_LIBS:lib%.so.xyzzy=$(DESTDIR)$(dynlibdir)/lib%.so)
 install-libexec: $(LIBEXEC_TARGETS:%=$(DESTDIR)$(libexecdir)/%)
 install-bin: $(BIN_TARGETS:%=$(DESTDIR)$(bindir)/%)
+install-symlinks: $(BIN_SYMLINKS:%=$(DESTDIR)$(bindir)/%)
 install-lib: $(STATIC_LIBS:lib%.a.xyzzy=$(DESTDIR)$(libdir)/lib%.a)
 install-include: $(ALL_INCLUDES:src/include/$(package)/%.h=$(DESTDIR)$(includedir)/$(package)/%.h) $(EXTRA_INCLUDES:src/include/%.h=$(DESTDIR)$(includedir)/%.h)
+install-pkgconfig: $(PC_TARGETS:%=$(DESTDIR)$(pkgconfdir)/%)
+
+tests: $(TEST_BINS)
+
+check: tests
+	@for i in $(TEST_BINS) ; do ./tools/run-test.sh $$i || exit 1 ; done
 
 ifneq ($(exthome),)
 
@@ -95,7 +143,7 @@ $(DESTDIR)$(exthome): $(DESTDIR)$(home)
 
 update: $(DESTDIR)$(exthome)
 
-global-links: $(DESTDIR)$(exthome) $(SHARED_LIBS:lib%.so.xyzzy=$(DESTDIR)$(sproot)/library.so/lib%.so.$(version_M)) $(BIN_TARGETS:%=$(DESTDIR)$(sproot)/command/%)
+global-links: $(DESTDIR)$(exthome) $(SHARED_LIBS:lib%.so.xyzzy=$(DESTDIR)$(sproot)/library.so/lib%.so.$(version_M)) $(BIN_TARGETS:%=$(DESTDIR)$(sproot)/command/%) $(BIN_SYMLINKS:%=$(DESTDIR)$(sproot)/command/%)
 
 $(DESTDIR)$(sproot)/command/%: $(DESTDIR)$(home)/command/%
 	exec $(INSTALL) -D -l ..$(subst $(sproot),,$(exthome))/command/$(<F) $@
@@ -112,12 +160,6 @@ $(DESTDIR)$(dynlibdir)/lib%.so $(DESTDIR)$(dynlibdir)/lib%.so.$(version_M): lib%
 	$(INSTALL) -l $(@F).$(version) $@.$(version_M) && \
 	exec $(INSTALL) -l $(@F).$(version_M) $@
 
-$(DESTDIR)$(libexecdir)/% $(DESTDIR)$(bindir)/%: % package/modes
-	exec $(INSTALL) -D -m 600 $< $@
-	grep -- ^$(@F) < package/modes | { read name mode owner && \
-	if [ x$$owner != x ] ; then chown -- $$owner $@ ; fi && \
-	chmod $$mode $@ ; }
-
 $(DESTDIR)$(libdir)/lib%.a: lib%.a.xyzzy
 	exec $(INSTALL) -D -m 644 $< $@
 
@@ -127,13 +169,16 @@ $(DESTDIR)$(includedir)/$(package)/%.h: src/include/$(package)/%.h
 $(DESTDIR)$(includedir)/%.h: src/include/%.h
 	exec $(INSTALL) -D -m 644 $< $@
 
+$(DESTDIR)$(pkgconfdir)/lib%.pc: lib%.pc
+	exec $(INSTALL) -D -m 644 $< $@
+
 %.o: %.c
 	exec $(CC) $(CPPFLAGS_ALL) $(CFLAGS_ALL) -c -o $@ $<
 
 %.lo: %.c
 	exec $(CC) $(CPPFLAGS_ALL) $(CFLAGS_ALL) $(CFLAGS_SHARED) -c -o $@ $<
 
-$(ALL_BINS):
+$(ALL_BINS) $(TEST_BINS):
 	exec $(CC) -o $@ $(CFLAGS_ALL) $(LDFLAGS_ALL) $(LDFLAGS_NOSHARED) $^ $(EXTRA_LIBS) $(LDLIBS)
 
 lib%.a.xyzzy:
@@ -141,8 +186,8 @@ lib%.a.xyzzy:
 	exec $(RANLIB) $@
 
 lib%.so.xyzzy:
-	exec $(CC) -o $@ $(CFLAGS_ALL) $(CFLAGS_SHARED) $(LDFLAGS_ALL) $(LDFLAGS_SHARED) -Wl,-soname,$(patsubst lib%.so.xyzzy,lib%.so.$(version_M),$@) $^ $(EXTRA_LIBS) $(LDLIBS)
+	exec $(CC) -o $@ $(CFLAGS_ALL) $(CFLAGS_SHARED) $(LDFLAGS_ALL) $(LDFLAGS_SHARED) -Wl,-soname,$(patsubst lib%.so.xyzzy,lib%.so.$(version_M),$@) -Wl,-rpath=$(dynlibdir) $^ $(EXTRA_LIBS) $(LDLIBS)
 
-.PHONY: it all clean distclean tgz strip install install-dynlib install-bin install-lib install-include
+.PHONY: it all clean distclean tests check tgz strip install install-dynlib install-bin install-lib install-include install-pkgconfig
 
 .DELETE_ON_ERROR:
diff --git a/NEWS b/NEWS
index 02691ca..096b9ef 100644
--- a/NEWS
+++ b/NEWS
@@ -1,9 +1,10 @@
 Changelog for nsss.
 
-In 0.2.0.6
+In 0.2.1.0
 ----------
 
  - Bugfixes.
+ - pkg-config support.
 
 
 In 0.2.0.5
diff --git a/configure b/configure
index 55acc14..7e01d5f 100755
--- a/configure
+++ b/configure
@@ -23,6 +23,7 @@ Fine tuning of the installation directories:
   --libexecdir=DIR              package-scoped executables [EPREFIX/libexec]
   --libdir=DIR                  static library files [PREFIX/lib]
   --includedir=DIR              C header files [PREFIX/include]
+  --pkgconfdir=DIR              pkg-config .pc files [PREFIX/lib/pkgconfig]
 
  If no --prefix option is given, by default libdir (but not dynlibdir) will be
  /usr/lib, and includedir will be /usr/include.
@@ -32,6 +33,7 @@ Dependencies:
   --with-include=DIR            add DIR to the list of searched directories for headers
   --with-lib=DIR                add DIR to the list of searched directories for static libraries
   --with-dynlib=DIR             add DIR to the list of searched directories for shared libraries
+  --with-pkgconfig[=PROG]       use pkg-config to look for dependencies
 
  If no --prefix option is given, by default sysdeps will be fetched from
  /usr/lib/skalibs/sysdeps.
@@ -43,8 +45,8 @@ Optional features:
   --enable-static-libc          make entirely static binaries [disabled]
   --disable-all-pic             don't build executables or static libs as PIC [enabled]
   --enable-slashpackage[=ROOT]  assume /package installation at ROOT [disabled]
-  --enable-absolute-paths       do not rely on PATH to access this package's binaries,
-                                  hardcode absolute BINDIR/foobar paths instead [disabled]
+  --enable-absolute-paths       hardcode absolute BINDIR/foobar paths in binaries [disabled]
+  --enable-pkgconfig            Build and install .pc files for pkg-config [disabled]
 
   --with-nsssd-socket=PATH      assume the nsssd socket is at PATH [/run/service/nsssd/s]
   --enable-libc-includes        overwrite {pwd,grp,shadow}.h in includedir [disabled]
@@ -142,6 +144,7 @@ libexecdir='$exec_prefix/libexec'
 bindir='$exec_prefix/bin'
 libdir='$prefix/lib'
 includedir='$prefix/include'
+pkgconfdir='$prefix/lib/pkgconfig'
 sysdeps='$prefix/lib/skalibs/sysdeps'
 manualsysdeps=false
 shared=false
@@ -149,14 +152,18 @@ static=true
 allpic=true
 slashpackage=false
 abspath=false
+pcw=false
 sproot=
 home=
 exthome=
 allstatic=true
 evenmorestatic=false
+pkgconf=
 addincpath=''
 addlibspath=''
 addlibdpath=''
+depincpath=''
+deplibpath=''
 vpaths=''
 vpathd=''
 build=
@@ -173,10 +180,14 @@ for arg ; do
     --bindir=*) bindir=${arg#*=} ;;
     --libdir=*) libdir=${arg#*=} ;;
     --includedir=*) includedir=${arg#*=} ;;
+    --pkgconfigdir=*) pkgconfigdir=${arg#*=} ;;
     --with-sysdeps=*) sysdeps=${arg#*=} manualsysdeps=true ;;
     --with-include=*) var=${arg#*=} ; stripdir var ; addincpath="$addincpath -I$var" ;;
     --with-lib=*) var=${arg#*=} ; stripdir var ; addlibspath="$addlibspath -L$var" ; vpaths="$vpaths $var" ;;
     --with-dynlib=*) var=${arg#*=} ; stripdir var ; addlibdpath="$addlibdpath -L$var" ; vpathd="$vpathd $var" ;;
+    --with-pkgconfig=*) pkgconf=${arg#*=} ;;
+    --with-pkgconfig) pkgconf=${PKG_CONFIG:-pkg-config} ;;
+    --without-pkgconfig) pkgconf= ;;
     --enable-shared|--enable-shared=yes) shared=true ;;
     --disable-shared|--enable-shared=no) shared=false ;;
     --enable-static|--enable-static=yes) static=true ;;
@@ -187,6 +198,8 @@ for arg ; do
     --disable-static-libc|--enable-static-libc=no) evenmorestatic=false ;;
     --enable-all-pic|--enable-all-pic=yes) allpic=true ;;
     --disable-all-pic|--enable-all-pic=no) allpic=false ;;
+    --enable-pkgconfig|--enable-pkgconfig=yes) pcw=true ;;
+    --disable-pkgconfig|--enable-pkgconfig=no) pcw=false ;;
     --enable-slashpackage=*) sproot=${arg#*=} ; slashpackage=true ; ;;
     --enable-slashpackage) sproot= ; slashpackage=true ;;
     --disable-slashpackage) sproot= ; slashpackage=false ;;
@@ -212,6 +225,9 @@ if test -z "$prefix" ; then
   if test "$includedir" = '$prefix/include' ; then
     includedir=/usr/include
   fi
+  if test "$pkgconfdir" = '$prefix/lib/pkgconfig' ; then
+    pkgconfdir=/usr/lib/pkgconfig
+  fi
   if test "$sysdeps" = '$prefix/lib/skalibs/sysdeps' ; then
     sysdeps=/usr/lib/skalibs/sysdeps
   fi
@@ -219,29 +235,60 @@ fi
 
 # Expand installation directories
 stripdir prefix
-for i in exec_prefix dynlibdir libexecdir bindir libdir includedir sysdeps sproot ; do
+for i in exec_prefix dynlibdir libexecdir bindir libdir includedir pkgconfdir sysdeps sproot ; do
   eval tmp=\${$i}
   eval $i=$tmp
   stripdir $i
 done
 
-# Get usable temp filenames
-i=0
-set -C
-while : ; do
-  i=$(($i+1))
-  tmpc="./tmp-configure-$$-$PPID-$i.c"
-  tmpo="./tmp-configure-$$-$PPID-$i.o"
-  tmpe="./tmp-configure-$$-$PPID-$i.tmp"
-  2>|/dev/null > "$tmpc" && break
-  2>|/dev/null > "$tmpo" && break
-  2>|/dev/null > "$tmpe" && break
-  test "$i" -gt 50 && fail "$0: cannot create temporary files"
-done
-set +C
-trap 'rm -f "$tmpc" "$tmpo" "$tmpe"' EXIT ABRT INT QUIT TERM HUP
+# Process deps-build
+if test -n "$pkgconf" || $pcw || $slashpackage ; then
+  oldifs="$IFS"
+  while IFS=" 	" read cond usedinlibs pkg ver libs ; do
+    IFS="$oldifs"
+    eval "cond=$cond; usedinlibs=$usedinlibs"
+    if $cond ; then
+      if test -n "$pkgconf" ; then
+        for lib in $libs ; do
+          if ! $pkgconf --atleast-version=${ver} --print-errors -- "$lib" ; then
+            echo "./configure: fatal: $pkgconf --atleast-version=${ver} --print-errors -- $lib failed" 1>&2
+            exit 1
+          fi
+          thisinc="`$pkgconf --cflags-only-I -- $lib`"
+          sldflags="`$pkgconf --libs-only-L --static -- $lib`"
+          dldflags="`$pkgconf --libs-only-L -- $lib`"
+          addincpath="${addincpath}${thisinc:+ }$thisinc"
+          addlibspath="${addlibspath}${sldflags:+ }$sldflags"
+          addlibdpath="${addlibdpath}${dldflags:+ }$dldflags"
+          for i in $sldflags ; do
+            vpaths="$vpaths ${i##-L}"
+          done
+          for i in $dldflags ; do
+            vpathd="$vpathd ${i##-L}"
+          done
+          if $usedinlibs ; then
+            depincpath="${depincpath}${thisinc:+ }$thisinc"
+            deplibpath="${deplibpath}${sldflags:+ }$sldflags"
+          fi
+        done
+      fi
+      if $slashpackage ; then
+        addincpath="$addincpath -I${DESTDIR}${sproot}${pkg}/include"
+        vpaths="$vpaths ${DESTDIR}${sproot}${pkg}/library"
+        addlibspath="$addlibspath -L${DESTDIR}${sproot}${pkg}/library"
+        vpathd="$vpathd ${DESTDIR}${sproot}${pkg}/library.so"
+        addlibdpath="$addlibdpath -L${DESTDIR}${sproot}${pkg}/library.so"
+        if $usedinlibs ; then
+          depincpath="$depincpath -I${DESTDIR}${sproot}${pkg}/include"
+          deplibpath="$deplibpath -L${DESTDIR}${sproot}${pkg}/library"
+        fi
+      fi
+    fi
+  done < package/deps-build
+  IFS="$oldifs"
+fi
 
-# Set slashpackage values
+# Other slashpackage values
 if $slashpackage ; then
   home=${sproot}/package/${category}/${package}-${version}
   exthome=${sproot}/package/${category}/${package}
@@ -256,22 +303,25 @@ if $slashpackage ; then
   libdir=${home}/library
   libexecdir=$bindir
   includedir=${home}/include
-  while read dep condvar ; do
-    if test -n "$condvar" ; then
-      eval "cond=$condvar"
-    else
-      cond=true
-    fi
-    if $cond ; then
-      addincpath="$addincpath -I${DESTDIR}${sproot}${dep}/include"
-      vpaths="$vpaths ${DESTDIR}${sproot}${dep}/library"
-      addlibspath="$addlibspath -L${DESTDIR}${sproot}${dep}/library"
-      vpathd="$vpathd ${DESTDIR}${sproot}${dep}/library.so"
-      addlibdpath="$addlibdpath -L${DESTDIR}${sproot}${dep}/library.so"
-    fi
-  done < package/deps-build
+  pkgconfdir=${home}/pkgconfig
 fi
 
+# Get usable temp filenames
+i=0
+set -C
+while : ; do
+  i=$(($i+1))
+  tmpc="./tmp-configure-$$-$PPID-$i.c"
+  tmpo="./tmp-configure-$$-$PPID-$i.o"
+  tmpe="./tmp-configure-$$-$PPID-$i.tmp"
+  2>|/dev/null > "$tmpc" && break
+  2>|/dev/null > "$tmpo" && break
+  2>|/dev/null > "$tmpe" && break
+  test "$i" -gt 50 && fail "$0: cannot create temporary files"
+done
+set +C
+trap 'rm -f "$tmpc" "$tmpo" "$tmpe"' EXIT ABRT INT QUIT TERM HUP
+
 # Find a C compiler to use
 if test -n "$target" && test x${build} != x${target} ; then
   cross=${target}-
@@ -389,12 +439,15 @@ libexecdir := $libexecdir
 bindir := $bindir
 libdir := $libdir
 includedir := $includedir
+pkgconfdir := $pkgconfdir
 sysdeps := $sysdeps
 slashpackage := $slashpackage
 sproot := $sproot
 version := $version
 home := $home
 exthome := $exthome
+extra_includedirs :=$depincpath
+extra_libdirs :=$deplibpath
 SPAWN_LIB := ${spawn_lib}
 SOCKET_LIB := ${socket_lib}
 SYSCLOCK_LIB := ${sysclock_lib}
@@ -403,17 +456,18 @@ UTIL_LIB := ${util_lib}
 
 CC := $CC_AUTO
 CPPFLAGS_AUTO := $CPPFLAGS_AUTO
-CPPFLAGS := $CPPFLAGS $CPPFLAGS_POST
+CPPFLAGS := ${CPPFLAGS}${CPPFLAGS_POST:+ }$CPPFLAGS_POST
 CFLAGS_AUTO := $CFLAGS_AUTO
-CFLAGS := $CFLAGS $CFLAGS_POST
+CFLAGS := ${CFLAGS}${CFLAGS_POST:+ }$CFLAGS_POST
 LDFLAGS_AUTO := $LDFLAGS_AUTO
-LDFLAGS := $LDFLAGS $LDFLAGS_POST
+LDFLAGS := ${LDFLAGS}${LDFLAGS_POST:+ }$LDFLAGS_POST
 LDFLAGS_SHARED := $LDFLAGS_SHARED
 LDFLAGS_NOSHARED := $LDFLAGS_NOSHARED
 CROSS_COMPILE := $cross
 
 vpath lib%.a$vpaths
 vpath lib%.so$vpathd
+
 EOF
 if $allstatic ; then
   echo ".LIBPATTERNS := lib%.a"
@@ -431,6 +485,11 @@ if $shared ; then
 else
   echo "DO_SHARED :="
 fi
+if $pcw ; then
+  echo "DO_PKGCONFIG := 1"
+else
+  echo "DO_PKGCONFIG :="
+fi
 if $allpic ; then
   echo "STATIC_LIBS_ARE_PIC := 1"
 else
diff --git a/doc/index.html b/doc/index.html
index a79ece0..cce2f7c 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -85,7 +85,7 @@ functions.
 requirement if you link against the shared version of the skalibs
 library. </li>
  <li> <a href="//skarnet.org/software/s6/">s6</a> version
-2.13.1.1 or later. It's a <em>run-time</em> requirement only, to run
+2.13.2.0 or later. It's a <em>run-time</em> requirement only, to run
 the nsssd service (and can be done without if you have a suitable replacement
 for <a href="//skarnet.org/software/s6/s6-ipcserver.html">s6-ipcserver</a>). </li>
 </ul>
@@ -100,7 +100,7 @@ for <a href="//skarnet.org/software/s6/s6-ipcserver.html">s6-ipcserver</a>). </l
 <h3> Download </h3>
 
 <ul>
- <li> The current released version of nsss is <a href="nsss-0.2.0.6.tar.gz">0.2.0.6</a>. </li>
+ <li> The current released version of nsss is <a href="nsss-0.2.1.0.tar.gz">0.2.1.0</a>. </li>
  <li> Alternatively, you can checkout a copy of the
 <a href="//git.skarnet.org/cgi-bin/cgit.cgi/nsss/">nsss
 git repository</a>:
diff --git a/doc/upgrade.html b/doc/upgrade.html
index bdb72f6..fca02aa 100644
--- a/doc/upgrade.html
+++ b/doc/upgrade.html
@@ -18,14 +18,14 @@
 
 <h1> What has changed in nsss </h1>
 
-<h2> In 0.2.0.6 </h2>
+<h2> In 0.2.1.0 </h2>
 
 <ul>
  <li> <a href="//skarnet.org/software/skalibs/">skalibs</a>
 dependency bumped to 2.14.4.0. </li>
  <li> <a href="//skarnet.org/software/s6/">s6</a> run-time
-dependency bumped to 2.13.1.1. </li>
- <li> Static libraries now install in <tt>/usr/lib</tt> by default. </li>
+dependency bumped to 2.13.2.0. </li>
+ <li> <tt>pkg-config</tt> is now supported, see <tt>./configure --help</tt>. </li>
 </ul>
 
 <h2> In 0.2.0.5 </h2>
diff --git a/package/deps-build b/package/deps-build
index 05d5af4..1a04c17 100644
--- a/package/deps-build
+++ b/package/deps-build
@@ -1 +1 @@
-/package/prog/skalibs
+true	true	/package/prog/skalibs	2.14.4.0	libskarnet
diff --git a/package/deps.mak b/package/deps.mak
index ec98fd2..6ef4e7b 100644
--- a/package/deps.mak
+++ b/package/deps.mak
@@ -162,29 +162,31 @@ src/tests/test-unix.o src/tests/test-unix.lo: src/tests/test-unix.c src/include/
 ifeq ($(strip $(STATIC_LIBS_ARE_PIC)),)
 libnsss.a.xyzzy: src/libnsss/nsss_all_endgrent.o src/libnsss/nsss_all_endpwent.o src/libnsss/nsss_all_endspent.o src/libnsss/nsss_all_errno.o src/libnsss/nsss_all_getgrent.o src/libnsss/nsss_all_getgrent_r.o src/libnsss/nsss_all_getgrgid.o src/libnsss/nsss_all_getgrgid_r.o src/libnsss/nsss_all_getgrnam.o src/libnsss/nsss_all_getgrnam_r.o src/libnsss/nsss_all_getgrouplist.o src/libnsss/nsss_all_getpwent.o src/libnsss/nsss_all_getpwent_r.o src/libnsss/nsss_all_getpwnam.o src/libnsss/nsss_all_getpwnam_r.o src/libnsss/nsss_all_getpwuid.o src/libnsss/nsss_all_getpwuid_r.o src/libnsss/nsss_all_getspent.o src/libnsss/nsss_all_getspent_r.o src/libnsss/nsss_all_getspnam.o src/libnsss/nsss_all_getspnam_r.o src/libnsss/nsss_all_setgrent.o src/libnsss/nsss_all_setpwent.o src/libnsss/nsss_all_setspent.o src/libnsss/nsss_grp_copy.o src/libnsss/nsss_grp_here.o src/libnsss/nsss_grouplist_adjust.o src/libnsss/nsss_pwd_copy.o src/libnsss/nsss_pwd_here.o src/libnsss/nsss_shadow_copy.o src/libnsss/nsss_shadow_here.o src/libnsss/nsss_switch_end.o src/libnsss/nsss_switch_endgrent.o src/libnsss/nsss_switch_endpwent.o src/libnsss/nsss_switch_endspent.o src/libnsss/nsss_switch_enumerator.o src/libnsss/nsss_switch_getgrent.o src/libnsss/nsss_switch_getgrent_r.o src/libnsss/nsss_switch_getgrgid.o src/libnsss/nsss_switch_getgrgid_r.o src/libnsss/nsss_switch_getgrnam.o src/libnsss/nsss_switch_getgrnam_r.o src/libnsss/nsss_switch_getgrouplist.o src/libnsss/nsss_switch_getpwent.o src/libnsss/nsss_switch_getpwent_r.o src/libnsss/nsss_switch_getpwnam.o src/libnsss/nsss_switch_getpwnam_r.o src/libnsss/nsss_switch_getpwuid.o src/libnsss/nsss_switch_getpwuid_r.o src/libnsss/nsss_switch_getspent.o src/libnsss/nsss_switch_getspent_r.o src/libnsss/nsss_switch_getspnam.o src/libnsss/nsss_switch_getspnam_r.o src/libnsss/nsss_switch_grp_end.o src/libnsss/nsss_switch_grp_get.o src/libnsss/nsss_switch_grp_getbygid.o src/libnsss/nsss_switch_grp_getbyname.o src/libnsss/nsss_switch_grp_getlist.o src/libnsss/nsss_switch_grp_read.o src/libnsss/nsss_switch_grp_rewind.o src/libnsss/nsss_switch_op.o src/libnsss/nsss_switch_pwd_end.o src/libnsss/nsss_switch_pwd_get.o src/libnsss/nsss_switch_pwd_getbyname.o src/libnsss/nsss_switch_pwd_getbyuid.o src/libnsss/nsss_switch_pwd_read.o src/libnsss/nsss_switch_pwd_rewind.o src/libnsss/nsss_switch_query.o src/libnsss/nsss_switch_query_mutex.o src/libnsss/nsss_switch_query_start.o src/libnsss/nsss_switch_send.o src/libnsss/nsss_switch_sendv.o src/libnsss/nsss_switch_setgrent.o src/libnsss/nsss_switch_setpwent.o src/libnsss/nsss_switch_setspent.o src/libnsss/nsss_switch_shadow_end.o src/libnsss/nsss_switch_shadow_get.o src/libnsss/nsss_switch_shadow_getbyname.o src/libnsss/nsss_switch_shadow_read.o src/libnsss/nsss_switch_shadow_rewind.o src/libnsss/nsss_switch_set_timeout.o src/libnsss/nsss_switch_start.o src/libnsss/nsss_switch_startf.o src/libnsss/nsss_unix_end.o src/libnsss/nsss_unix_endgrent.o src/libnsss/nsss_unix_endpwent.o src/libnsss/nsss_unix_endspent.o src/libnsss/nsss_unix_field.o src/libnsss/nsss_unix_getgrent.o src/libnsss/nsss_unix_getgrent_r.o src/libnsss/nsss_unix_getgrgid.o src/libnsss/nsss_unix_getgrgid_r.o src/libnsss/nsss_unix_getgrnam.o src/libnsss/nsss_unix_getgrnam_r.o src/libnsss/nsss_unix_getgrouplist.o src/libnsss/nsss_unix_getgrouplist_preadjust.o src/libnsss/nsss_unix_getpwent.o src/libnsss/nsss_unix_getpwent_r.o src/libnsss/nsss_unix_getpwnam.o src/libnsss/nsss_unix_getpwnam_r.o src/libnsss/nsss_unix_getpwuid.o src/libnsss/nsss_unix_getpwuid_r.o src/libnsss/nsss_unix_getspent.o src/libnsss/nsss_unix_getspent_r.o src/libnsss/nsss_unix_getspnam.o src/libnsss/nsss_unix_getspnam_r.o src/libnsss/nsss_unix_grp_get.o src/libnsss/nsss_unix_grp_getbygid.o src/libnsss/nsss_unix_grp_getbyname.o src/libnsss/nsss_unix_grp_getlist.o src/libnsss/nsss_unix_grp_here.o src/libnsss/nsss_unix_maybe_start.o src/libnsss/nsss_unix_pwd_get.o src/libnsss/nsss_unix_pwd_getbyname.o src/libnsss/nsss_unix_pwd_getbyuid.o src/libnsss/nsss_unix_pwd_here.o src/libnsss/nsss_unix_rewind.o src/libnsss/nsss_unix_setgrent.o src/libnsss/nsss_unix_setpwent.o src/libnsss/nsss_unix_setspent.o src/libnsss/nsss_unix_shadow_get.o src/libnsss/nsss_unix_shadow_getbyname.o src/libnsss/nsss_unix_shadow_here.o src/libnsss/nsss_unix_start.o
 else
-libnsss.a.xyzzy: src/libnsss/nsss_all_endgrent.lo src/libnsss/nsss_all_endpwent.lo src/libnsss/nsss_all_endspent.lo src/libnsss/nsss_all_errno.lo src/libnsss/nsss_all_getgrent.lo src/libnsss/nsss_all_getgrent_r.lo src/libnsss/nsss_all_getgrgid.lo src/libnsss/nsss_all_getgrgid_r.lo src/libnsss/nsss_all_getgrnam.lo src/libnsss/nsss_all_getgrnam_r.lo src/libnsss/nsss_all_getgrouplist.lo src/libnsss/nsss_all_getpwent.lo src/libnsss/nsss_all_getpwent_r.lo src/libnsss/nsss_all_getpwnam.lo src/libnsss/nsss_all_getpwnam_r.lo src/libnsss/nsss_all_getpwuid.lo src/libnsss/nsss_all_getpwuid_r.lo src/libnsss/nsss_all_getspent.lo src/libnsss/nsss_all_getspent_r.lo src/libnsss/nsss_all_getspnam.lo src/libnsss/nsss_all_getspnam_r.lo src/libnsss/nsss_all_setgrent.lo src/libnsss/nsss_all_setpwent.lo src/libnsss/nsss_all_setspent.lo src/libnsss/nsss_grp_copy.lo src/libnsss/nsss_grp_here.lo src/libnsss/nsss_grouplist_adjust.lo src/libnsss/nsss_pwd_copy.lo src/libnsss/nsss_pwd_here.lo src/libnsss/nsss_shadow_copy.lo src/libnsss/nsss_shadow_here.lo src/libnsss/nsss_switch_end.lo src/libnsss/nsss_switch_endgrent.lo src/libnsss/nsss_switch_endpwent.lo src/libnsss/nsss_switch_endspent.lo src/libnsss/nsss_switch_enumerator.lo src/libnsss/nsss_switch_getgrent.lo src/libnsss/nsss_switch_getgrent_r.lo src/libnsss/nsss_switch_getgrgid.lo src/libnsss/nsss_switch_getgrgid_r.lo src/libnsss/nsss_switch_getgrnam.lo src/libnsss/nsss_switch_getgrnam_r.lo src/libnsss/nsss_switch_getgrouplist.lo src/libnsss/nsss_switch_getpwent.lo src/libnsss/nsss_switch_getpwent_r.lo src/libnsss/nsss_switch_getpwnam.lo src/libnsss/nsss_switch_getpwnam_r.lo src/libnsss/nsss_switch_getpwuid.lo src/libnsss/nsss_switch_getpwuid_r.lo src/libnsss/nsss_switch_getspent.lo src/libnsss/nsss_switch_getspent_r.lo src/libnsss/nsss_switch_getspnam.lo src/libnsss/nsss_switch_getspnam_r.lo src/libnsss/nsss_switch_grp_end.lo src/libnsss/nsss_switch_grp_get.lo src/libnsss/nsss_switch_grp_getbygid.lo src/libnsss/nsss_switch_grp_getbyname.lo src/libnsss/nsss_switch_grp_getlist.lo src/libnsss/nsss_switch_grp_read.lo src/libnsss/nsss_switch_grp_rewind.lo src/libnsss/nsss_switch_op.lo src/libnsss/nsss_switch_pwd_end.lo src/libnsss/nsss_switch_pwd_get.lo src/libnsss/nsss_switch_pwd_getbyname.lo src/libnsss/nsss_switch_pwd_getbyuid.lo src/libnsss/nsss_switch_pwd_read.lo src/libnsss/nsss_switch_pwd_rewind.lo src/libnsss/nsss_switch_query.lo src/libnsss/nsss_switch_query_mutex.lo src/libnsss/nsss_switch_query_start.lo src/libnsss/nsss_switch_send.lo src/libnsss/nsss_switch_sendv.lo src/libnsss/nsss_switch_setgrent.lo src/libnsss/nsss_switch_setpwent.lo src/libnsss/nsss_switch_setspent.lo src/libnsss/nsss_switch_shadow_end.lo src/libnsss/nsss_switch_shadow_get.lo src/libnsss/nsss_switch_shadow_getbyname.lo src/libnsss/nsss_switch_shadow_read.lo src/libnsss/nsss_switch_shadow_rewind.lo src/libnsss/nsss_switch_set_timeout.lo src/libnsss/nsss_switch_start.lo src/libnsss/nsss_switch_startf.lo src/libnsss/nsss_unix_end.lo src/libnsss/nsss_unix_endgrent.lo src/libnsss/nsss_unix_endpwent.lo src/libnsss/nsss_unix_endspent.lo src/libnsss/nsss_unix_field.lo src/libnsss/nsss_unix_getgrent.lo src/libnsss/nsss_unix_getgrent_r.lo src/libnsss/nsss_unix_getgrgid.lo src/libnsss/nsss_unix_getgrgid_r.lo src/libnsss/nsss_unix_getgrnam.lo src/libnsss/nsss_unix_getgrnam_r.lo src/libnsss/nsss_unix_getgrouplist.lo src/libnsss/nsss_unix_getgrouplist_preadjust.lo src/libnsss/nsss_unix_getpwent.lo src/libnsss/nsss_unix_getpwent_r.lo src/libnsss/nsss_unix_getpwnam.lo src/libnsss/nsss_unix_getpwnam_r.lo src/libnsss/nsss_unix_getpwuid.lo src/libnsss/nsss_unix_getpwuid_r.lo src/libnsss/nsss_unix_getspent.lo src/libnsss/nsss_unix_getspent_r.lo src/libnsss/nsss_unix_getspnam.lo src/libnsss/nsss_unix_getspnam_r.lo src/libnsss/nsss_unix_grp_get.lo src/libnsss/nsss_unix_grp_getbygid.lo src/libnsss/nsss_unix_grp_getbyname.lo src/libnsss/nsss_unix_grp_getlist.lo src/libnsss/nsss_unix_grp_here.lo src/libnsss/nsss_unix_maybe_start.lo src/libnsss/nsss_unix_pwd_get.lo src/libnsss/nsss_unix_pwd_getbyname.lo src/libnsss/nsss_unix_pwd_getbyuid.lo src/libnsss/nsss_unix_pwd_here.lo src/libnsss/nsss_unix_rewind.lo src/libnsss/nsss_unix_setgrent.lo src/libnsss/nsss_unix_setpwent.lo src/libnsss/nsss_unix_setspent.lo src/libnsss/nsss_unix_shadow_get.lo src/libnsss/nsss_unix_shadow_getbyname.lo src/libnsss/nsss_unix_shadow_here.lo src/libnsss/nsss_unix_start.lo
+libnsss.a.xyzzy:src/libnsss/nsss_all_endgrent.lo src/libnsss/nsss_all_endpwent.lo src/libnsss/nsss_all_endspent.lo src/libnsss/nsss_all_errno.lo src/libnsss/nsss_all_getgrent.lo src/libnsss/nsss_all_getgrent_r.lo src/libnsss/nsss_all_getgrgid.lo src/libnsss/nsss_all_getgrgid_r.lo src/libnsss/nsss_all_getgrnam.lo src/libnsss/nsss_all_getgrnam_r.lo src/libnsss/nsss_all_getgrouplist.lo src/libnsss/nsss_all_getpwent.lo src/libnsss/nsss_all_getpwent_r.lo src/libnsss/nsss_all_getpwnam.lo src/libnsss/nsss_all_getpwnam_r.lo src/libnsss/nsss_all_getpwuid.lo src/libnsss/nsss_all_getpwuid_r.lo src/libnsss/nsss_all_getspent.lo src/libnsss/nsss_all_getspent_r.lo src/libnsss/nsss_all_getspnam.lo src/libnsss/nsss_all_getspnam_r.lo src/libnsss/nsss_all_setgrent.lo src/libnsss/nsss_all_setpwent.lo src/libnsss/nsss_all_setspent.lo src/libnsss/nsss_grp_copy.lo src/libnsss/nsss_grp_here.lo src/libnsss/nsss_grouplist_adjust.lo src/libnsss/nsss_pwd_copy.lo src/libnsss/nsss_pwd_here.lo src/libnsss/nsss_shadow_copy.lo src/libnsss/nsss_shadow_here.lo src/libnsss/nsss_switch_end.lo src/libnsss/nsss_switch_endgrent.lo src/libnsss/nsss_switch_endpwent.lo src/libnsss/nsss_switch_endspent.lo src/libnsss/nsss_switch_enumerator.lo src/libnsss/nsss_switch_getgrent.lo src/libnsss/nsss_switch_getgrent_r.lo src/libnsss/nsss_switch_getgrgid.lo src/libnsss/nsss_switch_getgrgid_r.lo src/libnsss/nsss_switch_getgrnam.lo src/libnsss/nsss_switch_getgrnam_r.lo src/libnsss/nsss_switch_getgrouplist.lo src/libnsss/nsss_switch_getpwent.lo src/libnsss/nsss_switch_getpwent_r.lo src/libnsss/nsss_switch_getpwnam.lo src/libnsss/nsss_switch_getpwnam_r.lo src/libnsss/nsss_switch_getpwuid.lo src/libnsss/nsss_switch_getpwuid_r.lo src/libnsss/nsss_switch_getspent.lo src/libnsss/nsss_switch_getspent_r.lo src/libnsss/nsss_switch_getspnam.lo src/libnsss/nsss_switch_getspnam_r.lo src/libnsss/nsss_switch_grp_end.lo src/libnsss/nsss_switch_grp_get.lo src/libnsss/nsss_switch_grp_getbygid.lo src/libnsss/nsss_switch_grp_getbyname.lo src/libnsss/nsss_switch_grp_getlist.lo src/libnsss/nsss_switch_grp_read.lo src/libnsss/nsss_switch_grp_rewind.lo src/libnsss/nsss_switch_op.lo src/libnsss/nsss_switch_pwd_end.lo src/libnsss/nsss_switch_pwd_get.lo src/libnsss/nsss_switch_pwd_getbyname.lo src/libnsss/nsss_switch_pwd_getbyuid.lo src/libnsss/nsss_switch_pwd_read.lo src/libnsss/nsss_switch_pwd_rewind.lo src/libnsss/nsss_switch_query.lo src/libnsss/nsss_switch_query_mutex.lo src/libnsss/nsss_switch_query_start.lo src/libnsss/nsss_switch_send.lo src/libnsss/nsss_switch_sendv.lo src/libnsss/nsss_switch_setgrent.lo src/libnsss/nsss_switch_setpwent.lo src/libnsss/nsss_switch_setspent.lo src/libnsss/nsss_switch_shadow_end.lo src/libnsss/nsss_switch_shadow_get.lo src/libnsss/nsss_switch_shadow_getbyname.lo src/libnsss/nsss_switch_shadow_read.lo src/libnsss/nsss_switch_shadow_rewind.lo src/libnsss/nsss_switch_set_timeout.lo src/libnsss/nsss_switch_start.lo src/libnsss/nsss_switch_startf.lo src/libnsss/nsss_unix_end.lo src/libnsss/nsss_unix_endgrent.lo src/libnsss/nsss_unix_endpwent.lo src/libnsss/nsss_unix_endspent.lo src/libnsss/nsss_unix_field.lo src/libnsss/nsss_unix_getgrent.lo src/libnsss/nsss_unix_getgrent_r.lo src/libnsss/nsss_unix_getgrgid.lo src/libnsss/nsss_unix_getgrgid_r.lo src/libnsss/nsss_unix_getgrnam.lo src/libnsss/nsss_unix_getgrnam_r.lo src/libnsss/nsss_unix_getgrouplist.lo src/libnsss/nsss_unix_getgrouplist_preadjust.lo src/libnsss/nsss_unix_getpwent.lo src/libnsss/nsss_unix_getpwent_r.lo src/libnsss/nsss_unix_getpwnam.lo src/libnsss/nsss_unix_getpwnam_r.lo src/libnsss/nsss_unix_getpwuid.lo src/libnsss/nsss_unix_getpwuid_r.lo src/libnsss/nsss_unix_getspent.lo src/libnsss/nsss_unix_getspent_r.lo src/libnsss/nsss_unix_getspnam.lo src/libnsss/nsss_unix_getspnam_r.lo src/libnsss/nsss_unix_grp_get.lo src/libnsss/nsss_unix_grp_getbygid.lo src/libnsss/nsss_unix_grp_getbyname.lo src/libnsss/nsss_unix_grp_getlist.lo src/libnsss/nsss_unix_grp_here.lo src/libnsss/nsss_unix_maybe_start.lo src/libnsss/nsss_unix_pwd_get.lo src/libnsss/nsss_unix_pwd_getbyname.lo src/libnsss/nsss_unix_pwd_getbyuid.lo src/libnsss/nsss_unix_pwd_here.lo src/libnsss/nsss_unix_rewind.lo src/libnsss/nsss_unix_setgrent.lo src/libnsss/nsss_unix_setpwent.lo src/libnsss/nsss_unix_setspent.lo src/libnsss/nsss_unix_shadow_get.lo src/libnsss/nsss_unix_shadow_getbyname.lo src/libnsss/nsss_unix_shadow_here.lo src/libnsss/nsss_unix_start.lo
 endif
+libnsss.pc: EXTRA_LIBS := -lskarnet -lpthread
 libnsss.so.xyzzy: EXTRA_LIBS := -lskarnet -lpthread
-libnsss.so.xyzzy: src/libnsss/nsss_all_endgrent.lo src/libnsss/nsss_all_endpwent.lo src/libnsss/nsss_all_endspent.lo src/libnsss/nsss_all_errno.lo src/libnsss/nsss_all_getgrent.lo src/libnsss/nsss_all_getgrent_r.lo src/libnsss/nsss_all_getgrgid.lo src/libnsss/nsss_all_getgrgid_r.lo src/libnsss/nsss_all_getgrnam.lo src/libnsss/nsss_all_getgrnam_r.lo src/libnsss/nsss_all_getgrouplist.lo src/libnsss/nsss_all_getpwent.lo src/libnsss/nsss_all_getpwent_r.lo src/libnsss/nsss_all_getpwnam.lo src/libnsss/nsss_all_getpwnam_r.lo src/libnsss/nsss_all_getpwuid.lo src/libnsss/nsss_all_getpwuid_r.lo src/libnsss/nsss_all_getspent.lo src/libnsss/nsss_all_getspent_r.lo src/libnsss/nsss_all_getspnam.lo src/libnsss/nsss_all_getspnam_r.lo src/libnsss/nsss_all_setgrent.lo src/libnsss/nsss_all_setpwent.lo src/libnsss/nsss_all_setspent.lo src/libnsss/nsss_grp_copy.lo src/libnsss/nsss_grp_here.lo src/libnsss/nsss_grouplist_adjust.lo src/libnsss/nsss_pwd_copy.lo src/libnsss/nsss_pwd_here.lo src/libnsss/nsss_shadow_copy.lo src/libnsss/nsss_shadow_here.lo src/libnsss/nsss_switch_end.lo src/libnsss/nsss_switch_endgrent.lo src/libnsss/nsss_switch_endpwent.lo src/libnsss/nsss_switch_endspent.lo src/libnsss/nsss_switch_enumerator.lo src/libnsss/nsss_switch_getgrent.lo src/libnsss/nsss_switch_getgrent_r.lo src/libnsss/nsss_switch_getgrgid.lo src/libnsss/nsss_switch_getgrgid_r.lo src/libnsss/nsss_switch_getgrnam.lo src/libnsss/nsss_switch_getgrnam_r.lo src/libnsss/nsss_switch_getgrouplist.lo src/libnsss/nsss_switch_getpwent.lo src/libnsss/nsss_switch_getpwent_r.lo src/libnsss/nsss_switch_getpwnam.lo src/libnsss/nsss_switch_getpwnam_r.lo src/libnsss/nsss_switch_getpwuid.lo src/libnsss/nsss_switch_getpwuid_r.lo src/libnsss/nsss_switch_getspent.lo src/libnsss/nsss_switch_getspent_r.lo src/libnsss/nsss_switch_getspnam.lo src/libnsss/nsss_switch_getspnam_r.lo src/libnsss/nsss_switch_grp_end.lo src/libnsss/nsss_switch_grp_get.lo src/libnsss/nsss_switch_grp_getbygid.lo src/libnsss/nsss_switch_grp_getbyname.lo src/libnsss/nsss_switch_grp_getlist.lo src/libnsss/nsss_switch_grp_read.lo src/libnsss/nsss_switch_grp_rewind.lo src/libnsss/nsss_switch_op.lo src/libnsss/nsss_switch_pwd_end.lo src/libnsss/nsss_switch_pwd_get.lo src/libnsss/nsss_switch_pwd_getbyname.lo src/libnsss/nsss_switch_pwd_getbyuid.lo src/libnsss/nsss_switch_pwd_read.lo src/libnsss/nsss_switch_pwd_rewind.lo src/libnsss/nsss_switch_query.lo src/libnsss/nsss_switch_query_mutex.lo src/libnsss/nsss_switch_query_start.lo src/libnsss/nsss_switch_send.lo src/libnsss/nsss_switch_sendv.lo src/libnsss/nsss_switch_setgrent.lo src/libnsss/nsss_switch_setpwent.lo src/libnsss/nsss_switch_setspent.lo src/libnsss/nsss_switch_shadow_end.lo src/libnsss/nsss_switch_shadow_get.lo src/libnsss/nsss_switch_shadow_getbyname.lo src/libnsss/nsss_switch_shadow_read.lo src/libnsss/nsss_switch_shadow_rewind.lo src/libnsss/nsss_switch_set_timeout.lo src/libnsss/nsss_switch_start.lo src/libnsss/nsss_switch_startf.lo src/libnsss/nsss_unix_end.lo src/libnsss/nsss_unix_endgrent.lo src/libnsss/nsss_unix_endpwent.lo src/libnsss/nsss_unix_endspent.lo src/libnsss/nsss_unix_field.lo src/libnsss/nsss_unix_getgrent.lo src/libnsss/nsss_unix_getgrent_r.lo src/libnsss/nsss_unix_getgrgid.lo src/libnsss/nsss_unix_getgrgid_r.lo src/libnsss/nsss_unix_getgrnam.lo src/libnsss/nsss_unix_getgrnam_r.lo src/libnsss/nsss_unix_getgrouplist.lo src/libnsss/nsss_unix_getgrouplist_preadjust.lo src/libnsss/nsss_unix_getpwent.lo src/libnsss/nsss_unix_getpwent_r.lo src/libnsss/nsss_unix_getpwnam.lo src/libnsss/nsss_unix_getpwnam_r.lo src/libnsss/nsss_unix_getpwuid.lo src/libnsss/nsss_unix_getpwuid_r.lo src/libnsss/nsss_unix_getspent.lo src/libnsss/nsss_unix_getspent_r.lo src/libnsss/nsss_unix_getspnam.lo src/libnsss/nsss_unix_getspnam_r.lo src/libnsss/nsss_unix_grp_get.lo src/libnsss/nsss_unix_grp_getbygid.lo src/libnsss/nsss_unix_grp_getbyname.lo src/libnsss/nsss_unix_grp_getlist.lo src/libnsss/nsss_unix_grp_here.lo src/libnsss/nsss_unix_maybe_start.lo src/libnsss/nsss_unix_pwd_get.lo src/libnsss/nsss_unix_pwd_getbyname.lo src/libnsss/nsss_unix_pwd_getbyuid.lo src/libnsss/nsss_unix_pwd_here.lo src/libnsss/nsss_unix_rewind.lo src/libnsss/nsss_unix_setgrent.lo src/libnsss/nsss_unix_setpwent.lo src/libnsss/nsss_unix_setspent.lo src/libnsss/nsss_unix_shadow_get.lo src/libnsss/nsss_unix_shadow_getbyname.lo src/libnsss/nsss_unix_shadow_here.lo src/libnsss/nsss_unix_start.lo
+libnsss.so.xyzzy:src/libnsss/nsss_all_endgrent.lo src/libnsss/nsss_all_endpwent.lo src/libnsss/nsss_all_endspent.lo src/libnsss/nsss_all_errno.lo src/libnsss/nsss_all_getgrent.lo src/libnsss/nsss_all_getgrent_r.lo src/libnsss/nsss_all_getgrgid.lo src/libnsss/nsss_all_getgrgid_r.lo src/libnsss/nsss_all_getgrnam.lo src/libnsss/nsss_all_getgrnam_r.lo src/libnsss/nsss_all_getgrouplist.lo src/libnsss/nsss_all_getpwent.lo src/libnsss/nsss_all_getpwent_r.lo src/libnsss/nsss_all_getpwnam.lo src/libnsss/nsss_all_getpwnam_r.lo src/libnsss/nsss_all_getpwuid.lo src/libnsss/nsss_all_getpwuid_r.lo src/libnsss/nsss_all_getspent.lo src/libnsss/nsss_all_getspent_r.lo src/libnsss/nsss_all_getspnam.lo src/libnsss/nsss_all_getspnam_r.lo src/libnsss/nsss_all_setgrent.lo src/libnsss/nsss_all_setpwent.lo src/libnsss/nsss_all_setspent.lo src/libnsss/nsss_grp_copy.lo src/libnsss/nsss_grp_here.lo src/libnsss/nsss_grouplist_adjust.lo src/libnsss/nsss_pwd_copy.lo src/libnsss/nsss_pwd_here.lo src/libnsss/nsss_shadow_copy.lo src/libnsss/nsss_shadow_here.lo src/libnsss/nsss_switch_end.lo src/libnsss/nsss_switch_endgrent.lo src/libnsss/nsss_switch_endpwent.lo src/libnsss/nsss_switch_endspent.lo src/libnsss/nsss_switch_enumerator.lo src/libnsss/nsss_switch_getgrent.lo src/libnsss/nsss_switch_getgrent_r.lo src/libnsss/nsss_switch_getgrgid.lo src/libnsss/nsss_switch_getgrgid_r.lo src/libnsss/nsss_switch_getgrnam.lo src/libnsss/nsss_switch_getgrnam_r.lo src/libnsss/nsss_switch_getgrouplist.lo src/libnsss/nsss_switch_getpwent.lo src/libnsss/nsss_switch_getpwent_r.lo src/libnsss/nsss_switch_getpwnam.lo src/libnsss/nsss_switch_getpwnam_r.lo src/libnsss/nsss_switch_getpwuid.lo src/libnsss/nsss_switch_getpwuid_r.lo src/libnsss/nsss_switch_getspent.lo src/libnsss/nsss_switch_getspent_r.lo src/libnsss/nsss_switch_getspnam.lo src/libnsss/nsss_switch_getspnam_r.lo src/libnsss/nsss_switch_grp_end.lo src/libnsss/nsss_switch_grp_get.lo src/libnsss/nsss_switch_grp_getbygid.lo src/libnsss/nsss_switch_grp_getbyname.lo src/libnsss/nsss_switch_grp_getlist.lo src/libnsss/nsss_switch_grp_read.lo src/libnsss/nsss_switch_grp_rewind.lo src/libnsss/nsss_switch_op.lo src/libnsss/nsss_switch_pwd_end.lo src/libnsss/nsss_switch_pwd_get.lo src/libnsss/nsss_switch_pwd_getbyname.lo src/libnsss/nsss_switch_pwd_getbyuid.lo src/libnsss/nsss_switch_pwd_read.lo src/libnsss/nsss_switch_pwd_rewind.lo src/libnsss/nsss_switch_query.lo src/libnsss/nsss_switch_query_mutex.lo src/libnsss/nsss_switch_query_start.lo src/libnsss/nsss_switch_send.lo src/libnsss/nsss_switch_sendv.lo src/libnsss/nsss_switch_setgrent.lo src/libnsss/nsss_switch_setpwent.lo src/libnsss/nsss_switch_setspent.lo src/libnsss/nsss_switch_shadow_end.lo src/libnsss/nsss_switch_shadow_get.lo src/libnsss/nsss_switch_shadow_getbyname.lo src/libnsss/nsss_switch_shadow_read.lo src/libnsss/nsss_switch_shadow_rewind.lo src/libnsss/nsss_switch_set_timeout.lo src/libnsss/nsss_switch_start.lo src/libnsss/nsss_switch_startf.lo src/libnsss/nsss_unix_end.lo src/libnsss/nsss_unix_endgrent.lo src/libnsss/nsss_unix_endpwent.lo src/libnsss/nsss_unix_endspent.lo src/libnsss/nsss_unix_field.lo src/libnsss/nsss_unix_getgrent.lo src/libnsss/nsss_unix_getgrent_r.lo src/libnsss/nsss_unix_getgrgid.lo src/libnsss/nsss_unix_getgrgid_r.lo src/libnsss/nsss_unix_getgrnam.lo src/libnsss/nsss_unix_getgrnam_r.lo src/libnsss/nsss_unix_getgrouplist.lo src/libnsss/nsss_unix_getgrouplist_preadjust.lo src/libnsss/nsss_unix_getpwent.lo src/libnsss/nsss_unix_getpwent_r.lo src/libnsss/nsss_unix_getpwnam.lo src/libnsss/nsss_unix_getpwnam_r.lo src/libnsss/nsss_unix_getpwuid.lo src/libnsss/nsss_unix_getpwuid_r.lo src/libnsss/nsss_unix_getspent.lo src/libnsss/nsss_unix_getspent_r.lo src/libnsss/nsss_unix_getspnam.lo src/libnsss/nsss_unix_getspnam_r.lo src/libnsss/nsss_unix_grp_get.lo src/libnsss/nsss_unix_grp_getbygid.lo src/libnsss/nsss_unix_grp_getbyname.lo src/libnsss/nsss_unix_grp_getlist.lo src/libnsss/nsss_unix_grp_here.lo src/libnsss/nsss_unix_maybe_start.lo src/libnsss/nsss_unix_pwd_get.lo src/libnsss/nsss_unix_pwd_getbyname.lo src/libnsss/nsss_unix_pwd_getbyuid.lo src/libnsss/nsss_unix_pwd_here.lo src/libnsss/nsss_unix_rewind.lo src/libnsss/nsss_unix_setgrent.lo src/libnsss/nsss_unix_setpwent.lo src/libnsss/nsss_unix_setspent.lo src/libnsss/nsss_unix_shadow_get.lo src/libnsss/nsss_unix_shadow_getbyname.lo src/libnsss/nsss_unix_shadow_here.lo src/libnsss/nsss_unix_start.lo
 ifeq ($(strip $(STATIC_LIBS_ARE_PIC)),)
 libnsssd.a.xyzzy: src/nsssd/nsssd_main.o src/nsssd/nsssd_convert.o
 else
-libnsssd.a.xyzzy: src/nsssd/nsssd_main.lo src/nsssd/nsssd_convert.lo
+libnsssd.a.xyzzy:src/nsssd/nsssd_main.lo src/nsssd/nsssd_convert.lo
 endif
+libnsssd.pc: EXTRA_LIBS := -lskarnet
 libnsssd.so.xyzzy: EXTRA_LIBS := -lskarnet
-libnsssd.so.xyzzy: src/nsssd/nsssd_main.lo src/nsssd/nsssd_convert.lo
-nsssd-nslcd: EXTRA_LIBS := -lskarnet ${SOCKET_LIB} ${SYSCLOCK_LIB}
-nsssd-nslcd: src/nsssd/nsssd-nslcd.o ${LIBNSSSD}
-nsssd-switch: EXTRA_LIBS := -lskarnet ${SOCKET_LIB} ${SYSCLOCK_LIB}
-nsssd-switch: src/nsssd/nsssd-switch.o ${LIBNSSSD} ${LIBNSSS}
-nsssd-unix: EXTRA_LIBS := -lskarnet
-nsssd-unix: src/nsssd/nsssd-unix.o ${LIBNSSSD} ${LIBNSSS}
-test-all-fallback: EXTRA_LIBS := -lskarnet ${SOCKET_LIB} ${SYSCLOCK_LIB}
-test-all-fallback: src/tests/test-all-fallback.o ${LIBNSSS}
-test-nsssd-switch: EXTRA_LIBS := -lskarnet ${SOCKET_LIB} ${SYSCLOCK_LIB}
-test-nsssd-switch: src/tests/test-nsssd-switch.o ${LIBNSSS}
-test-switch: EXTRA_LIBS := -lskarnet ${SOCKET_LIB} ${SYSCLOCK_LIB}
-test-switch: src/tests/test-switch.o ${LIBNSSS}
-test-unix: EXTRA_LIBS := -lskarnet
-test-unix: src/tests/test-unix.o ${LIBNSSS}
+libnsssd.so.xyzzy:src/nsssd/nsssd_main.lo src/nsssd/nsssd_convert.lo
+nsssd-nslcd: EXTRA_LIBS := ${SOCKET_LIB} ${SYSCLOCK_LIB}
+nsssd-nslcd: src/nsssd/nsssd-nslcd.o ${LIBNSSSD} -lskarnet
+nsssd-switch: EXTRA_LIBS := ${SOCKET_LIB} ${SYSCLOCK_LIB}
+nsssd-switch: src/nsssd/nsssd-switch.o ${LIBNSSSD} ${LIBNSSS} -lskarnet
+nsssd-unix: EXTRA_LIBS :=
+nsssd-unix: src/nsssd/nsssd-unix.o ${LIBNSSSD} ${LIBNSSS} -lskarnet
+test-all-fallback: EXTRA_LIBS := ${SOCKET_LIB} ${SYSCLOCK_LIB}
+test-all-fallback: src/tests/test-all-fallback.o ${LIBNSSS} -lskarnet
+test-nsssd-switch: EXTRA_LIBS := ${SOCKET_LIB} ${SYSCLOCK_LIB}
+test-nsssd-switch: src/tests/test-nsssd-switch.o ${LIBNSSS} -lskarnet
+test-switch: EXTRA_LIBS := ${SOCKET_LIB} ${SYSCLOCK_LIB}
+test-switch: src/tests/test-switch.o ${LIBNSSS} -lskarnet
+test-unix: EXTRA_LIBS :=
+test-unix: src/tests/test-unix.o ${LIBNSSS} -lskarnet
 INTERNAL_LIBS :=
diff --git a/package/info b/package/info
index a23bf2b..8323879 100644
--- a/package/info
+++ b/package/info
@@ -1,4 +1,4 @@
 package=nsss
-version=0.2.0.6
+version=0.2.1.0
 category=admin
 package_macro_name=NSSS
diff --git a/package/targets.mak b/package/targets.mak
index 06d3672..e7b8b54 100644
--- a/package/targets.mak
+++ b/package/targets.mak
@@ -12,6 +12,8 @@ test-nsssd-switch \
 test-all-fallback
 
 LIB_DEFS := NSSS=nsss NSSSD=nsssd
+NSSS_DESCRIPTION := The nsss library (user-facing part of nsss, applications link against it)
+NSSSD_DESCRIPTION := The nsssd library (non-user-facing part of nsss, only nsss modules link against it)
 
 ifneq ($(DO_LIBC_INCLUDES),)
 EXTRA_INCLUDES := src/include/pwd.h src/include/grp.h src/include/shadow.h
diff --git a/tools/gen-deps.sh b/tools/gen-deps.sh
index befe021..9e18eb1 100755
--- a/tools/gen-deps.sh
+++ b/tools/gen-deps.sh
@@ -61,20 +61,23 @@ for dir in $(ls -1 src | grep -v ^include) ; do
     deps=
     libs=
     while read dep ; do
-      if echo $dep | grep -q -e ^-l -e '^\${.*_LIB}' ; then
+      if echo $dep | grep -q -e '^-l' -e '^\${.*_LIB}' ; then
         libs="$libs $dep"
+      elif echo $dep | grep -q '^\${LIB' ; then
+        deps="$deps $dep"
       else
         deps="$deps src/$dir/$dep"
       fi
     done < src/$dir/deps-lib/$file
     echo 'ifeq ($(strip $(STATIC_LIBS_ARE_PIC)),)'
-    echo "lib${file}.a.xyzzy:$deps"
+    echo "lib${file}.a.xyzzy:${deps}"
     echo else
-    echo "lib${file}.a.xyzzy:$(echo "$deps" | sed 's/\.o/.lo/g')"
+    echo "lib${file}.a.xyzzy:$(echo ${deps} | sed 's/\.o/.lo/g')"
     echo endif
-    if grep -E "^LIB_DEFS [+:]=" package/targets.mak | grep -qF "$file" ; then
+    if grep -qE "^LIB_DEFS [+:]= .*=$file" package/targets.mak ; then
+      echo "lib${file}.pc: EXTRA_LIBS :=${libs}"
       echo "lib${file}.so.xyzzy: EXTRA_LIBS :=$libs"
-      echo "lib${file}.so.xyzzy:$(echo "$deps" | sed 's/\.o/.lo/g')"
+      echo "lib${file}.so.xyzzy:$(echo ${deps} | sed 's/\.o/.lo/g')"
     else
       internal_libs="$internal_libs lib${file}.a.xyzzy"
     fi
@@ -84,10 +87,10 @@ for dir in $(ls -1 src | grep -v ^include) ; do
     deps=
     libs=
     while read dep ; do
-      if echo $dep | grep -q -- \\.o$ ; then
+      if echo $dep | grep -q \\.o$ ; then
         dep="src/$dir/$dep"
       fi
-      if echo $dep | grep -q -e ^-l -e '^\${.*_LIB}' ; then
+      if echo $dep | grep -qx '\${.*_LIB}' ; then
         libs="$libs $dep"
       else
         deps="$deps $dep"
diff --git a/tools/gen-dotpc.sh b/tools/gen-dotpc.sh
new file mode 100755
index 0000000..63c8929
--- /dev/null
+++ b/tools/gen-dotpc.sh
@@ -0,0 +1,101 @@
+#!/bin/sh -e
+
+isunique () {
+  x=$1
+  set -- $2
+  while test "$#" -gt 0 ; do
+    if test "$x" = "$1" ; then
+      return 1
+    fi
+    shift
+  done
+  return 0
+}
+
+uniqit () {
+  res=
+  while test "$#" -gt 0 ; do
+    if isunique "$1" "$res" ; then
+      res="${res}${res:+ }${1}"
+    fi
+    shift
+  done
+  printf %s\\n "$res"
+}
+
+filterout () {
+  res=
+  filter="$1"
+  shift
+  while test "$#" -gt 0 ; do
+    if isunique "$1" "$filter" ; then
+      res="${res}${res:+ }${1}"
+    fi
+    shift
+  done
+  printf %s\\n "$res"
+}
+
+print_requires () {
+  line=
+  oldifs="$IFS"
+  while IFS=" 	" read condvar usedinlibs pkg ver libs ; do
+    IFS="$oldifs"
+    for h ; do
+      i=lib${h##-l}
+      for j in $libs ; do
+        if test "$i" = "$j" ; then
+          line="${line}${line:+, }${i} >= ${ver}"
+        fi
+      done
+    done
+  done < package/deps-build
+  IFS="$oldifs"
+  echo "Requires: $line"
+}
+
+. package/info
+
+ilist=
+dlist=
+slist=
+
+if test "${includedir}" != /usr/include ; then
+  ilist="-I${includedir}"
+fi
+if test -n "${extra_includedirs}" ; then
+  ilist="${ilist}${ilist:+ }${extra_includedirs}"
+fi
+ilist=`uniqit ${ilist}`
+
+if test "${dynlibdir}" != /usr/lib && test "${dynlibdir}" != /lib ; then
+  dlist="-L${dynlibdir}"
+fi
+
+if test "${libdir}" != /usr/lib && test "${libdir}" != /lib ; then
+ slist="-L${libdir}"
+fi
+if test -n "${extra_libdirs}" ; then
+  slist="${slist}${slist:+ }${extra_libdirs}"
+fi
+slist="$(filterout "${dlist}" $(uniqit ${slist}))"
+
+echo "prefix=${prefix}"
+echo "includedir=${includedir}"
+echo "libdir=${libdir}"
+echo "dynlibdir=${dynlibdir}"
+echo
+echo "Name: ${library}"
+echo "Version: ${version}"
+echo "Description: ${description:-The ${library} library.}"
+echo "URL: ${url:-https://skarnet.org/software/${package}/}"
+if test -n "${extra_libs}" ; then
+  print_requires ${extra_libs}
+fi
+if test -n "$ilist" ; then
+  echo "Cflags: ${ilist}"
+fi
+echo "Libs: ${dlist}${dlist:+ }-l${library}${ldlibs:+ }${ldlibs}"
+if test -n "${extra_libs}" ; then
+  echo "Libs.private: ${slist}${slist:+ }${extra_libs}"
+fi