[Bug bootstrap/55886] New: gcc/configure.ac problems lead to GCC 4.7.2 not building for x86_64-pc-mingw64

[Bug bootstrap/55886] New: gcc/configure.ac problems lead to GCC 4.7.2 not building for x86_64-pc-mingw64

[devurandom at gmx dot net]

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: unassigned@gcc.gnu.org
        ReportedBy: devurandom@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

[Bug bootstrap/55886] gcc/configure.ac problems lead to GCC 4.7.2 not building for x86_64-pc-mingw64

[devurandom at gmx dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55886

--- Comment #1 from devurandom at gmx dot net 2013-02-13 22:33:33 UTC ---
Created attachment 29447
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29447
gcc-4.7.2-define-have_gas_aligned_comm.patch

(In reply to comment #0)
>     case $target_os in
> 3604:      cygwin* | pe | mingw32* | interix*)
>     # Recent binutils allows the three-operand form of ".comm" on PE.  This
> [...]
> 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)

Attached patch fixes this error. However, I ran into further problems (bug
#56311), so it might have other side-effects.

[Bug bootstrap/55886] gcc/configure.ac problems lead to GCC 4.7.2 not building for x86_64-pc-mingw64

[ktietz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55886

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P5
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-11-25
                 CC|                            |ktietz at gcc dot gnu.org
     Ever confirmed|0                           |1
           Severity|normal                      |enhancement

--- Comment #2 from Kai Tietz <ktietz at gcc dot gnu.org> ---
The use of target's host-part-name mingw64 is strongly discuraged.  Most checks
in binutils, gdb, gcc, etc (and all their testsuites) are using still mingw32.
Therefore for resolve your issue use triplet x86_64-pc-mingw32 instead.

I will keep this bug as long-term issue.  Nothing to fix soon.

[Bug bootstrap/55886] gcc/configure.ac problems lead to GCC 4.7.2 not building for x86_64-pc-mingw64

[jyong at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55886

jyong at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX
                 CC|                            |jyong at gcc dot gnu.org

--- Comment #3 from jyong at gcc dot gnu.org ---
x86_64-w64-mingw32 has been the defacto triplet for targeting Windows 64bit
Win32API for awhile now.

Closing this ticket for now.