Added pkg-config file

configure.sh

@@ -34,10 +34,13 @@ locals() {
     esac
 }
 
+VERSION=`cat VERSION`
 TARGET=markdown
 . ./configure.inc
 
 AC_INIT $TARGET
+AC_SUB 'PACKAGE_NAME' lib$TARGET
+AC_SUB 'PACKAGE_VERSION' $VERSION
 
 for banned_with in dl fenced-code id-anchor github-tags urlencoded-anchor; do
     banned_with_variable_ref=\$WITH_`echo "$banned_with" | $AC_UPPERCASE | tr - _`
@@ -159,4 +162,4 @@ fi
 
 [ "$WITH_PANDOC_HEADER" ] && AC_DEFINE 'PANDOC_HEADER' '1'
 
-AC_OUTPUT Makefile version.c mkdio.h
+AC_OUTPUT Makefile version.c mkdio.h libmarkdown.pc

libmarkdown.pc.in

@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@prefix@
+libdir=@libdir@
+includedir=@prefix@/include
+
+Name: @PACKAGE_NAME@
+Version: @PACKAGE_VERSION@
+Description: C implementation of John Gruber's Markdown markup language
+
+Libs: -L${libdir} -lmarkdown @LIBS@
+Cflags: -I${includedir}