Install a libfreefare.pc pkg-config module.

Makefile.am

@@ -9,3 +9,6 @@ lib_LTLIBRARIES = libfreefare.la
 libfreefare_la_SOURCES = mifare_classic.c
 libfreefare_la_HEADERS = mifare_classic.h
 libfreefare_ladir = $(includedir)
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = libfreefare.pc

configure.ac

@@ -27,4 +27,7 @@ AC_FUNC_REALLOC
 # Checks for pkg-config modules.
 PKG_CHECK_MODULES([LIBNFC], [libnfc], [], [AC_MSG_ERROR([libnfc is mandatory.])])
 
-AC_OUTPUT([Makefile])
+PKG_CONFIG_REQUIRES="libnfc"
+AC_SUBST([PKG_CONFIG_REQUIRES])
+
+AC_OUTPUT([Makefile libfreefare.pc])

libfreefare.pc.in

@@ -0,0 +1,12 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libfreefare
+Description: MIFARE contactless tag access library
+Version: @VERSION@
+URL: http://code.google.com/p/nfc-tools
+Requires: @PKG_CONFIG_REQUIRES@
+Libs: -L${libdir} -lfreefare
+Cflags: -I${includedir}