cpp: Add pkgconfig file for gpgmepp

* configure.ac: Add substitutions GPGMEPP_PKGCONFIG_LIBS,
GPGMEPP_PKGCONFIG_CFLAGS, GPGMEPP_PKGCONFIG_HOST. Apply them. Configure
gpgmepp.pc file.
* lang/cpp/src/Makefile.am (pkgconfigdir, pkgconfig_DATA): New.
(EXTRA_DIST): Add gpgmepp.pc.in.
* lang/cpp/src/gpgmepp.pc.in: New.
--

This pkgconfig file will be used by qgpgme to find gpgmepp.

GnuPG-bug-id: 7110

configure.ac

@@ -1001,12 +1001,16 @@ AH_BOTTOM([
 ])
 
 
-# Substitution used for gpgme-config and gpgme.pc
+# Substitution used for gpgme-config and gpgme.pc and gpgmepp.pc
 GPGME_CONFIG_LIBS="-lgpgme"
 GPGME_CONFIG_CFLAGS=""
 GPGME_CONFIG_HOST="$host"
 GPGME_CONFIG_AVAIL_LANG="$enabled_languages"
 
+GPGMEPP_PKGCONFIG_LIBS="-lgpgmepp"
+GPGMEPP_PKGCONFIG_CFLAGS=""
+GPGMEPP_PKGCONFIG_HOST="$host"
+
 case "$includedir" in
   /usr/include|/include) ;;
   '${prefix}/include')
@@ -1016,6 +1020,11 @@ case "$includedir" in
       else
         GPGME_CONFIG_CFLAGS="-I\${includedir} $GPGME_CONFIG_CFLAGS"
       fi
+      if test -z "$GPGMEPP_PKGCONFIG_CFLAGS"; then
+        GPGMEPP_PKGCONFIG_CFLAGS="-I\${includedir}"
+      else
+        GPGMEPP_PKGCONFIG_CFLAGS="-I\${includedir} $GPGMEPP_PKGCONFIG_CFLAGS"
+      fi
     fi
     ;;
   *)
@@ -1024,6 +1033,11 @@ case "$includedir" in
     else
       GPGME_CONFIG_CFLAGS="-I\${includedir} $GPGME_CONFIG_CFLAGS"
     fi
+    if test -z "$GPGMEPP_PKGCONFIG_CFLAGS"; then
+      GPGMEPP_PKGCONFIG_CFLAGS="-I\${includedir}"
+    else
+      GPGMEPP_PKGCONFIG_CFLAGS="-I\${includedir} $GPGMEPP_PKGCONFIG_CFLAGS"
+    fi
     ;;
 esac
 case "$libdir" in
@@ -1032,12 +1046,17 @@ case "$libdir" in
     if test "$exec_prefix" = "NONE"; then
       if test "$prefix" != / -a "$prefix" != /usr; then
         GPGME_CONFIG_LIBS="-L\${libdir} $GPGME_CONFIG_LIBS"
+        GPGMEPP_PKGCONFIG_LIBS="-L\${libdir} $GPGMEPP_PKGCONFIG_LIBS"
       fi
     elif test "$exec_prefix" != / -a "$exec_prefix" != /usr; then
       GPGME_CONFIG_LIBS="-L\${libdir} $GPGME_CONFIG_LIBS"
+      GPGMEPP_PKGCONFIG_LIBS="-L\${libdir} $GPGMEPP_PKGCONFIG_LIBS"
     fi
     ;;
-  *) GPGME_CONFIG_LIBS="-L\${libdir} $GPGME_CONFIG_LIBS" ;;
+  *)
+    GPGME_CONFIG_LIBS="-L\${libdir} $GPGME_CONFIG_LIBS"
+    GPGMEPP_PKGCONFIG_LIBS="-L\${libdir} $GPGMEPP_PKGCONFIG_LIBS"
+    ;;
 esac
 
 AC_SUBST(GPGME_CONFIG_API_VERSION)
@@ -1045,6 +1064,9 @@ AC_SUBST(GPGME_CONFIG_LIBS)
 AC_SUBST(GPGME_CONFIG_CFLAGS)
 AC_SUBST(GPGME_CONFIG_HOST)
 AC_SUBST(GPGME_CONFIG_AVAIL_LANG)
+AC_SUBST(GPGMEPP_PKGCONFIG_LIBS)
+AC_SUBST(GPGMEPP_PKGCONFIG_CFLAGS)
+AC_SUBST(GPGMEPP_PKGCONFIG_HOST)
 
 # Frob'da Variables
 LTLIBOBJS=`echo "$LIB@&t@OBJS" |
@@ -1113,6 +1135,7 @@ AC_CONFIG_FILES(Makefile src/Makefile
 AC_CONFIG_FILES(src/gpgme-config, chmod +x src/gpgme-config)
 AC_CONFIG_FILES(lang/cpp/Makefile lang/cpp/src/Makefile)
 AC_CONFIG_FILES(lang/cpp/tests/Makefile)
+AC_CONFIG_FILES(lang/cpp/src/gpgmepp.pc)
 AC_CONFIG_FILES(lang/cpp/src/GpgmeppConfig-w32.cmake.in)
 AC_CONFIG_FILES(lang/cpp/src/GpgmeppConfig.cmake.in)
 AC_CONFIG_FILES(lang/cpp/src/GpgmeppConfigVersion.cmake)

lang/cpp/src/Makefile.am

@@ -19,8 +19,12 @@
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 # 02111-1307, USA
 
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = gpgmepp.pc
+
 EXTRA_DIST = GpgmeppConfig.cmake.in.in GpgmeppConfigVersion.cmake.in \
-             gpgmepp_version.h.in GpgmeppConfig-w32.cmake.in.in
+             gpgmepp_version.h.in GpgmeppConfig-w32.cmake.in.in \
+             gpgmepp.pc.in
 
 lib_LTLIBRARIES = libgpgmepp.la
 

lang/cpp/src/gpgmepp.pc.in

@@ -0,0 +1,13 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+includedir=@includedir@
+libdir=@libdir@
+host=@GPGMEPP_PKGCONFIG_HOST@
+
+Name: gpgmepp
+Description: GnuPG Made Easy (C++ binding)
+Requires.private: gpg-error, gpgme
+Version: @PACKAGE_VERSION@
+Cflags: @GPGMEPP_PKGCONFIG_CFLAGS@
+Libs: @GPGMEPP_PKGCONFIG_LIBS@
+URL: https://www.gnupg.org/software/gpgme/index.html