[libpeas] Allow building libpeas without building libpeasui.

[Steve Frécinaux <sfre src gnome org>]

commit 273aeae8b2d4ccffa910f03e14179d80437d00ba
Author: Steve Frécinaux <code istique net>
Date:   Mon Jul 5 15:15:59 2010 +0200

    Allow building libpeas without building libpeasui.
    
    This can be handy for environments using libpeas but not using Gtk+,
    where Gtk+ 3.0 might not be available yet. Such environments include
    Clutter/Mx applications or command-line utilities.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=623597

 Makefile.am      |    6 +++++-
 configure.ac     |   36 +++++++++++++++++++++++++-----------
 data/Makefile.am |    6 +++++-
 3 files changed, 35 insertions(+), 13 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index a5ed3af..6d6787e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,4 +2,8 @@
 ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
 DISTCHECK_CONFIGURE_FLAGS=--enable-gtk-doc --enable-introspection
 
-SUBDIRS = libpeas libpeasui loaders data peas-demo po docs
+SUBDIRS = libpeas loaders data po docs
+
+if ENABLE_LIBPEASUI
+SUBDIRS += libpeasui peas-demo
+endif
diff --git a/configure.ac b/configure.ac
index 92375e6..650c030 100644
--- a/configure.ac
+++ b/configure.ac
@@ -76,6 +76,15 @@ PKG_CHECK_MODULES(PEAS, [
 	gobject-introspection-1.0 >= 0.6.7
 ])
 
+dnl ================================================================
+dnl Build libpeasui
+dnl ================================================================
+
+AC_ARG_ENABLE(libpeasui,
+	      AS_HELP_STRING([--enable-libpeasui],[Build libpeasui for Gtk widgetry]),
+	      [enable_libpeasui=$enableval],
+	      [enable_libpeasui=yes])
+
 dnl We currently allow building libpeas with Gtk+ 2.0 for testing purposes and
 dnl technology preview. but do *not* distribute such a version!
 AC_ARG_ENABLE(gtk2-test-build,
@@ -83,18 +92,22 @@ AC_ARG_ENABLE(gtk2-test-build,
 	      [use_gtk2=$enableval],
 	      [use_gtk2=no])
 
-if test "$use_gtk2" != "yes"; then
-	GTK_TYPELIB=Gtk-3.0
-	GTK_PKG_REQUIREMENT="gtk+-3.0 >= 2.90"
-	GDK_REQUIRED=gdk-3.0
-else
-	GTK_TYPELIB=Gtk-2.0
-	GTK_PKG_REQUIREMENT="gtk+-2.0 >= 2.16"
-	GDK_REQUIRED=gdk-2.0
+if test "$enable_libpeasui" = "yes"; then
+	if test "$use_gtk2" != "yes"; then
+		GTK_TYPELIB=Gtk-3.0
+		GTK_PKG_REQUIREMENT="gtk+-3.0 >= 2.90"
+		GDK_REQUIRED=gdk-3.0
+	else
+		GTK_TYPELIB=Gtk-2.0
+		GTK_PKG_REQUIREMENT="gtk+-2.0 >= 2.16"
+		GDK_REQUIRED=gdk-2.0
+	fi
+	PKG_CHECK_MODULES(PEASUI, [$GTK_PKG_REQUIREMENT])
+	AC_SUBST(GTK_TYPELIB)
+	AC_SUBST(GTK_PKG_REQUIREMENT)
 fi
-PKG_CHECK_MODULES(PEASUI, [$GTK_PKG_REQUIREMENT])
-AC_SUBST(GTK_TYPELIB)
-AC_SUBST(GTK_PKG_REQUIREMENT)
+
+AM_CONDITIONAL([ENABLE_LIBPEASUI],[test "x$enable_libpeasui" = "xyes"])
 
 dnl ================================================================
 dnl Check for native OSX
@@ -299,6 +312,7 @@ Configuration:
         Source code location          : ${srcdir}
         Compiler                      : ${CC}
         Installation prefix           : ${prefix}
+	Build libpeasui	              : ${enable_libpeasui}
         Seed JS support               : ${found_seed}
         Python support                : ${found_python}
 "
diff --git a/data/Makefile.am b/data/Makefile.am
index b8dcb7c..1f9d254 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -1,6 +1,10 @@
 SUBDIRS=icons
 
 pkgconfigdir = $(libdir)/pkgconfig
-pkgconfig_DATA = libpeas-1.0.pc libpeasui-1.0.pc
+pkgconfig_DATA = libpeas-1.0.pc
+
+if ENABLE_LIBPEASUI
+pkgconfig_DATA += libpeasui-1.0.pc
+endif
 
 EXTRA_DIST = libpeas-1.0.pc.in libpeasui-1.0.pc.in