[patch] Disable static build for libjava

[Matthias Klose <doko@ubuntu.com>]

As discussed at the Google GCC gathering, disable the build of static libraries
in libjava, which should cut the build time of libjava by 50%.  The static
libjava build isn't useful out of the box, and I don't see it packaged by Linux
distributions either.

The AC_PROG_LIBTOOL check is needed to get access to the enable_shared macro.
I'm unsure about the check in the switch construct. Taken from libtool.m4, and
determining the value of enable_shared_with_static_runtimes.

Ok for the trunk?

2011-07-07  Matthias Klose  <doko@ubuntu.com>

        * Makefile.def (target_modules/libjava): Pass
        $(libjava_disable_static).
        * configure.ac: Check for libtool, pass --disable-static
        in libjava_disable_static.
        * Makefile.in: Regenerate.
        * configure: Likewise.

Index: Makefile.def
===================================================================
--- Makefile.def	(revision 175963)
+++ Makefile.def	(working copy)
@@ -132,7 +132,8 @@
 target_modules = { module= winsup; };
 target_modules = { module= libgloss; no_check=true; };
 target_modules = { module= libffi; };
-target_modules = { module= libjava; raw_cxx=true; };
+target_modules = { module= libjava; raw_cxx=true;
+                   extra_configure_flags="$(libjava_disable_static)"; };
 target_modules = { module= zlib; };
 target_modules = { module= boehm-gc; };
 target_modules = { module= rda; };
Index: configure.ac
===================================================================
--- configure.ac	(revision 175963)
+++ configure.ac	(working copy)
@@ -443,6 +443,16 @@
   ;;
 esac

+AC_PROG_LIBTOOL
+if test x$enable_shared = xyes ; then
+  case $host_cpu in
+  cygwin* | mingw* | pw32* | cegcc*)
+    ;;
+  *)
+    libjava_disable_static=--disable-static
+  esac
+fi
+AC_SUBST(libjava_disable_static)

 # Disable libmudflap on some systems.
 if test x$enable_libmudflap = x ; then