[Bug c/37989] New: PR37528 fix broke --disable-shared on mingw32

[mikpe at it dot uu dot se]

gcc-4.4-20081003 and later configured with --disable-shared for mingw32 attempt
to link with libgcc_eh.a even though it never built libgcc_eh.a (those object
files are included in libgcc.a):

/home/mikpe/gcc-4.4-20081031/configure --target=x86_64-pc-mingw32
--prefix=/tmp/cross-mingw64 --disable-nls --disable-shared
--enable-threads=win32 --enable-languages=c --with-gmp=/opt/local/gmp-4.2.4
--with-mpfr=/opt/local/mpfr-2.3.2 --disable-win32-registry
--enable-sjlj-exceptions
make
make install
echo "int main(void) { return 0; }" > trivial.c
/tmp/cross-mingw64/bin/x86_64-pc-mingw32-gcc trivial.c
/tmp/cross-mingw64/lib/gcc/x86_64-pc-mingw32/4.4.0/../../../../x86_64-pc-mingw32/bin/ld:
cannot find -lgcc_eh
collect2: ld returned 1 exit status

The fix for PR37528 changed mingw32.h to #define REAL_LIBGCC_SPEC, and it also
changed it to unconditionally link with -lgcc_eh for !shared-libgcc.
That only works if libgcc_eh.a actually was built, which isn't the case when
gcc was configured with --disable-shared.


-- 
           Summary: PR37528 fix broke --disable-shared on mingw32
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mikpe at it dot uu dot se
 GCC build triplet: i686-pc-cygwin
  GCC host triplet: i686-pc-cygwin
GCC target triplet: x86_64-pc-mingw32


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37989