http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47244
--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> 2011-01-11
14:03:29 UTC ---
testing the following patch.
Index: gcc.c
===================================================================
--- gcc.c (revision 168655)
+++ gcc.c (working copy)
@@ -621,11 +621,18 @@
# endif
#endif
-/* Conditional to test whether plugin is used or not. */
+/* Conditional to test whether plugin is used or not.
+ FIXME: For slim LTO we will need to enable plugin unconditionally. This
+ still cause problems with PLUGIN_LD != LD and when plugin is built but
+ not useable. For GCC 4.6 we don't support slim LTO and thus we can enable
+ plugin only when LTO is enabled. We still honor explicit
+ -fuse-linker-plugin. */
#ifdef HAVE_LTO_PLUGIN
-#define PLUGIN_COND "!fno-use-linker-plugin"
+#define PLUGIN_COND "!fno-use-linker-plugin:%{flto|flto=*|fuse-linker-plugin"
+#define PLUGIN_COND_CLOSE "}"
#else
#define PLUGIN_COND "fuse-linker-plugin"
+#define PLUGIN_COND_CLOSE ""
#endif
@@ -646,9 +653,9 @@
-plugin-opt=%(lto_wrapper) \
-plugin-opt=-fresolution=%u.res \
%{!nostdlib:%{!nodefaultlibs:%:pass-through-libs(%(link_gcc_c_sequence))}}
\
- } \
- %{flto*:%<fcompare-debug*} \
- %{flto*} %l " LINK_PIE_SPEC \
+ }"PLUGIN_COND_CLOSE" \
+ %{flto,flto=*:%<fcompare-debug*} \
+ %{flto,flto=*} %l " LINK_PIE_SPEC \
"%X %{o*} %{e*} %{N} %{n} %{r}\
%{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}}\
%{static:} %{L*} %(mfwrap) %(link_libgcc) %o\
