https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67172
Bug ID: 67172
Summary: [5/6 regression] i686-w64-mingw32 dwarf2 bootstrap
fails with undefined reference to __EH_FRAME_BEGIN__
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: breedlove.matt at gmail dot com
CC: alexpux at gmail dot com, ktietz70 at googlemail dot com,
mingw.android at gmail dot com
Target Milestone: ---
Host: i686-w64-mingw32
Target: i686-w64-mingw32
Build: i686-w64-mingw32
Created attachment 36161
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36161&action=edit
Build notes, save-temps, object files
GCC 5/6 branches fail to bootstrap starting with the beginning of GCC 5
releases configured as:
./configure \
--prefix=/mingw32 --with-local-prefix=/mingw32/local \
--build=i686-w64-mingw32 --host=i686-w64-mingw32
--target=i686-w64-mingw32 \
--with-native-system-header-dir=/mingw32/i686-w64-mingw32/include \
--libexecdir=/mingw32/lib \
--with-gxx-include-dir=/mingw32/include/c++/6.0.0 \
--enable-bootstrap \
--with-arch=i686 --with-tune=generic \
--enable-languages=c,lto,c++ \
--enable-shared --enable-static \
--enable-threads=posix \
--enable-libatomic --enable-graphite --enable-fully-dynamic-string \
--enable-libstdcxx-time=yes \
--disable-libstdcxx-pch --disable-libstdcxx-debug \
--enable-version-specific-runtime-libs \
--disable-isl-version-check \
--enable-lto --enable-libgomp --enable-checking=release \
--disable-multilib --disable-rpath --disable-win32-registry
--disable-nls --disable-werror --disable-symvers \
--with-libiconv --with-system-zlib \
--with-gmp=/mingw32 --with-mpfr=/mingw32 --with-mpc=/mingw32
--with-isl=/mingw32 \
--with-gnu-as --with-gnu-ld \
--disable-sjlj-exceptions --with-dwarf2
Problem discussed here:
http://sourceforge.net/p/msys2/mailman/msys2-users/thread/c48f5a81-8875-4b57-8668-d1d737c8a...@gmail.com/
The following patch reverts behavior to pre-5.0 behavior and allows building
and is in active use in msys2:
diff --git a/libgcc/libgcc2.c b/libgcc/libgcc2.c
index c737620..e5ab209 100644
--- a/libgcc/libgcc2.c
+++ b/libgcc/libgcc2.c
@@ -2211,7 +2211,7 @@ TRANSFER_FROM_TRAMPOLINE
/* Some ELF crosses use crtstuff.c to provide __CTOR_LIST__, but use this
code to run constructors. In that case, we need to handle EH here, too.
*/
-#ifdef __LIBGCC_EH_FRAME_SECTION_NAME__
+#ifdef EH_FRAME_SECTION_NAME
#include "unwind-dw2-fde.h"
extern unsigned char __EH_FRAME_BEGIN__[];
#endif
@@ -2231,7 +2231,7 @@ __do_global_dtors (void)
(*(p-1)) ();
}
#endif
-#if defined (__LIBGCC_EH_FRAME_SECTION_NAME__) && !defined (HAS_INIT_SECTION)
+#if defined (EH_FRAME_SECTION_NAME) && !defined (HAS_INIT_SECTION)
{
static int completed = 0;
if (! completed)
@@ -2250,7 +2250,7 @@ __do_global_dtors (void)
void
__do_global_ctors (void)
{
-#ifdef __LIBGCC_EH_FRAME_SECTION_NAME__
+#ifdef EH_FRAME_SECTION_NAME
{
static struct object object;
__register_frame_info (__EH_FRAME_BEGIN__, &object);
I've attached the build logs, -save-temps=obj output, and some additional
notes. If you can't find what you need in that file, I've put what couldn't
fit or probably isn't really wanted below:
https://drive.google.com/file/d/0B6Y2OcAf3yVKWTRaaWxtSEJjMGM/view?usp=sharing
