http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55886
Bug #: 55886
Summary: gcc/configure.ac problems lead to GCC 4.7.2 not
building for x86_64-pc-mingw64
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: devuran...@gmx.net
gcc/configure.ac contains several checks for mingw hosts, which are tied to
mingw32 instead of generic mingw. This might lead to problems when
crosscompiling a x86_64-pc-mingw64 compiler.
Possibly problematic lines in gcc-4.7.2/gcc/configure.ac:
case $host in
1453: *-*-mingw32*)
use_cxa_atexit=yes
case $host_os in
1656: win32 | pe | cygwin* | mingw32* | uwin*)
if test "x$enable_win32_registry" != xno; then
[case $target_os in
2565: win32 | pe | cygwin* | mingw32* | uwin*)
# Need to check that we generated the correct relocation for the
case $target_os in
3604: cygwin* | pe | mingw32* | interix*)
# Recent binutils allows the three-operand form of ".comm" on PE. This
They should probably use mingw* instead of mingw32*.
At least the last one (gcc/configure.ac:3604) is wrong and leads to
HAVE_GAS_ALIGNED_COMM being undefined for mingw64, which makes gcc/options.c
(autogenerated file) fail to compile:
options.c:952:3: error: ‘HAVE_GAS_ALIGNED_COMM’ undeclared here (not in a
function)
See also: https://bugs.gentoo.org/show_bug.cgi?id=447708
