[Bug target/66655] [5/6 Regression] miscompilation due to ipa-ra on MinGW

[nickc at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66655

Nick Clifton <nickc at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |nickc at gcc dot gnu.org

--- Comment #15 from Nick Clifton <nickc at gcc dot gnu.org> ---
Hi Roger, Hi Tony,

I have been trying, unsuccessfully, to build a complete cygwin toolchain, but I
was able to reproduce the reported failure.

I did try out the patch below, which implements Tony's idea of restricting my
original patch to just Mingw targets, but I was still unable to build a full
toolchain (for other reasons).  Roger - perhaps you would be able to test out
the patch in your build environment for me ?

Cheers
  Nick

Index: gcc/config/i386/cygwin.h
===================================================================
--- gcc/config/i386/cygwin.h    (revision 232666)
+++ gcc/config/i386/cygwin.h    (working copy)
@@ -157,3 +157,5 @@
 /* We should find a way to not have to update this manually.  */
 #define LIBGCJ_SONAME "cyggcj" /*LIBGCC_EH_EXTN*/ "-16.dll"

+/* Cygwin does not support weak symbols.  */
+#undef MAKE_DECL_ONE_ONLY