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authorAlan Modra <amodra@gmail.com>2014-08-14 13:46:09 +0930
committerAlan Modra <amodra@gmail.com>2014-08-14 13:46:09 +0930
commitb879806f2fdd2eca7092d7b854d6cbbbbbd0493b (patch)
treea59c6a936d98145ac0def25de34aafef89675366 /config
parent23ebe1a0bd86fdae83ca738cf75be67b58703756 (diff)
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configury changes to make ld plugin support controlled by --enable-plugins
This also makes --enable-plugins default to on for hosts that can support plugins, so we have consistent lto toolchain support. The ACX_LARGEFILE moves aren't strictly necessary, but are harmless and will be necessary if plugin support is extended to more hosts via libtool's dlopen support. I started down that path then decided it was more work than I was interested in doing. (ACX_LARGEFILE invokes AC_PLUGINS.) config/ * plugins.m4: Test for dlfcn.h or windows.h here to set default for --enable-plugins. Report error if someone tries to enable plugins on a host we don't support. bfd/ * configure.ac: Delete redundant plugin related checks. * configure: Regenerate. binutils/ * configure.ac: Move ACX_LARGEFILE after LT_INIT. * config.in: Regenerate. * configure: Regenerate. gas/ * configure.ac: Move ACX_LARGEFILE after LT_INIT. * config.in: Regenerate. * configure: Regenerate. gprof/ * configure.ac: Move ACX_LARGEFILE after LT_INIT. * configure: Regenerate. * gconfig.in: Regenerate. ld/ * configure.ac: Move AC_PROG_CC and other macros earlier. Delete plugin checks now done in config/plugins.m4. * config.in: Regenerate. * configure: Regenerate.
Diffstat (limited to 'config')
-rw-r--r--config/ChangeLog6
-rw-r--r--config/plugins.m423
2 files changed, 21 insertions, 8 deletions
diff --git a/config/ChangeLog b/config/ChangeLog
index 8212c31..b11ca26 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,9 @@
+2014-08-14 Alan Modra <amodra@gmail.com>
+
+ * plugins.m4: Test for dlfcn.h or windows.h here to set default
+ for --enable-plugins. Report error if someone tries to enable
+ plugins on a host we don't support.
+
2014-05-14 Sandra Loosemore <sandra@codesourcery.com>
* mt-nios2-elf: New file.
diff --git a/config/plugins.m4 b/config/plugins.m4
index 7ee8412..f65fdcb 100644
--- a/config/plugins.m4
+++ b/config/plugins.m4
@@ -1,11 +1,18 @@
AC_DEFUN([AC_PLUGINS],
[
-AC_ARG_ENABLE([plugins],
-AS_HELP_STRING([--enable-plugins], [Enable support for plugins (defaults no)]),
-[case "${enableval}" in
- yes | "") plugins=yes ;;
- no) plugins=no ;;
- *) plugins=yes ;;
- esac],
-[plugins=no])
+ maybe_plugins=no
+ AC_CHECK_HEADERS([dlfcn.h], [maybe_plugins=yes], [], [AC_INCLUDES_DEFAULT])
+ AC_CHECK_HEADERS([windows.h], [maybe_plugins=yes], [], [AC_INCLUDES_DEFAULT])
+
+ AC_ARG_ENABLE([plugins],
+ AS_HELP_STRING([--enable-plugins], [Enable support for plugins]),
+ [case "${enableval}" in
+ no) plugins=no ;;
+ *) plugins=yes
+ if test "$maybe_plugins" != "yes" ; then
+ AC_MSG_ERROR([Building with plugin support requires a host that supports dlopen.])
+ fi ;;
+ esac],
+ [plugins=$maybe_plugins]
+ )
])