libalpm: add pkg-config file

No one seems to do this "correctly", but for the sake of having an easy
method of detecting the presence and version of libalpm on a given
system, we provide a straightforward .pc file.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>

configure.ac

@@ -449,6 +449,7 @@ AC_DEFINE_UNQUOTED([SCRIPTLET_SHELL], "$SCRIPTLET_SHELL", [The full path of the
 AC_CONFIG_FILES([
 lib/libalpm/Makefile
 lib/libalpm/po/Makefile.in
+lib/libalpm/libalpm.pc
 src/pacman/Makefile
 src/pacman/po/Makefile.in
 src/util/Makefile

lib/libalpm/.gitignore

@@ -2,3 +2,4 @@
 .libs
 *.lo
 *.la
+libalpm.pc

lib/libalpm/Makefile.am

@@ -23,6 +23,9 @@ if ENABLE_GNU89_INLINE_CC
 AM_CFLAGS += -fgnu89-inline
 endif
 
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = libalpm.pc
+
 libalpm_la_SOURCES = \
 	add.h add.c \
 	alpm.h alpm.c \

lib/libalpm/libalpm.pc.in

@@ -0,0 +1,12 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libalpm
+Description: Arch Linux package management library
+URL: http://www.archlinux.org/pacman/
+Version: @VERSION@
+Cflags: -I${includedir}
+Libs: -L${libdir} -lalpm
+Libs.private: @LIBS@ @LIBARCHIVE_LIBS@ @LIBSSL_LIBS@ @LIBCURL_LIBS@ @GPGME_LIBS@