JehanneOS/newlib
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

cygwin: workaround GCC 6 changes

Browse Source 
GCC 6 includes a number of new warnings which cause Cygwin to either not
compile, or not work properly even if said warnings are ignored:

https://cygwin.com/ml/cygwin-developers/2017-09/msg00000.html
https://gcc.gnu.org/gcc-6/porting_to.html

For now, we use the flags necessary to revert to GCC 5 behaviour until we
can fix the code properly.

Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
This commit is contained in:
Yaakov Selkowitz 2017-09-12 14:30:34 -05:00
parent 21a39b20a5
commit 05cfd1aed8
3 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
winsup/cygwin/Makefile.in
View File

@ -73,11 +73,11 @@ CRT0:=$(cygwin_build)/crt0.o
#
MT_SAFE:=@MT_SAFE@
CCEXTRA=
COMMON_CFLAGS=-MMD ${$(*F)_CFLAGS} -Werror -fmerge-constants -ftracer $(CCEXTRA)
COMMON_CFLAGS=-MMD ${$(*F)_CFLAGS} -Werror -fno-delete-null-pointer-checks -fmerge-constants -ftracer $(CCEXTRA)
ifeq ($(target_cpu),x86_64)
COMMON_CFLAGS+=-mcmodel=small
endif
COMPILE.cc+=${COMMON_CFLAGS}
COMPILE.cc+=${COMMON_CFLAGS} -std=gnu++98
COMPILE.c+=${COMMON_CFLAGS}
AR:=@AR@

2
winsup/cygwin/crt0.c
View File

@ -20,7 +20,9 @@ void
mainCRTStartup ()
{
#ifdef __i386__
#pragma GCC diagnostic ignored "-Wframe-address"
(void)__builtin_return_address(1);
#pragma GCC diagnostic pop
asm volatile ("andl $-16,%%esp" ::: "%esp");
#endif

2
winsup/cygwin/init.cc
View File

@ -23,7 +23,9 @@ static void WINAPI
threadfunc_fe (VOID *arg)
{
#ifndef __x86_64__
#pragma GCC diagnostic ignored "-Wframe-address"
(void)__builtin_return_address(1);
#pragma GCC diagnostic pop
asm volatile ("andl $-16,%%esp" ::: "%esp");
#endif
_cygtls::call ((DWORD (*) (void *, void *)) TlsGetValue (_my_oldfunc), arg);