Move configure logic for enabling plugins to its own file

git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@6004 ea778897-0a13-0410-b9d1-a72fbfd435f5

ChangeLog

@@ -3,7 +3,7 @@
  * autogen.sh, configure.ac:
    Modernize configure.ac a bit.
  * configure.ac, m4/geany-revision.m4, m4/geany-binreloc.m4,
-   m4/geany-gnu-regex.m4:
+   m4/geany-gnu-regex.m4, m4/geany-plugins.m4:
    Extract some configure logic to separate files for better
    readability.
 

configure.ac

@@ -28,11 +28,6 @@ AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_INTLTOOL
 
-# for plugins
-AC_DISABLE_STATIC
-AM_PROG_LIBTOOL
-LIBTOOL="$LIBTOOL --silent"
-
 # autoscan start
 
 # Checks for header files.
@@ -78,17 +73,7 @@ AC_ARG_ENABLE([deprecated],
 
 
 # Plugins support
-AC_ARG_ENABLE([plugins],
-		[AS_HELP_STRING([--disable-plugins], [compile without plugin support  [default=no]])],
-		,
-		[enable_plugins=yes])
-
-if test "x$enable_plugins" = "xyes" ; then
-	AC_DEFINE([HAVE_PLUGINS], [1], [Define if plugins are enabled.])
-	AM_CONDITIONAL([PLUGINS], true)
-else
-	AM_CONDITIONAL([PLUGINS], false)
-fi
+GEANY_CHECK_PLUGINS
 
 
 # check whether to use included GNU regex library
@@ -238,7 +223,7 @@ if test -n "${build}" -a -n "${target}"; then
 	echo "Building Geany for                 : ${target}"
 fi
 echo "Using GTK version                  : ${GTK_VERSION}"
-echo "Build with plugin support          : ${enable_plugins}"
+echo "Build with plugin support          : ${geany_enable_plugins}"
 echo "Use virtual terminal support       : ${want_vte}"
 echo "Use (UNIX domain) socket support   : ${want_socket}"
 if test "x$enable_gnu_regex" = "xyes" ; then

m4/geany-plugins.m4

+dnl GEANY_CHECK_PLUGINS
+dnl Checks whether to enable plugins support
+dnl AC_DEFINEs HAVE_PLUGINS and AM_CONDITIONALs PLUGINS
+dnl Result is available in the geany_enable_plugins variable
+AC_DEFUN([GEANY_CHECK_PLUGINS],
+[
+	AC_REQUIRE([AC_DISABLE_STATIC])
+	AC_REQUIRE([AM_PROG_LIBTOOL])
+
+	AC_ARG_ENABLE([plugins],
+			[AS_HELP_STRING([--disable-plugins], [compile without plugin support [default=no]])],
+			[geany_enable_plugins=$enableval],
+			[geany_enable_plugins=yes])
+
+	dnl silent libtool if it's not already done
+	AS_CASE(["$LIBTOOL"],
+			[*--silent*], [],
+			[LIBTOOL="$LIBTOOL --silent"
+			 AC_SUBST([LIBTOOL])])
+
+	if test "x$geany_enable_plugins" = "xyes" ; then
+		AC_DEFINE([HAVE_PLUGINS], [1], [Define if plugins are enabled.])
+		AM_CONDITIONAL([PLUGINS], true)
+	else
+		AM_CONDITIONAL([PLUGINS], false)
+	fi
+])