On 2013-10-3 3:15, Yaakov (Cygwin/X) wrote:
> On 2013-10-02 13:55, LRN wrote:
>> On 02.10.2013 22:50, Alexey Pavlov wrote:
>>> 2013/10/2 LRN wrote:
>>>> (offtopic: it looks like a bug that gdb links to libexpat.a instead of
>>>> libexpat.dll.a)
>
> FWIW, this also affects libiconv and libintl when building with NLS.
>
>>> Why it a bug? I'm build GDB with static libexpat very often.
>>
>> Because nothing htere indicates that it should be linked statically. It
>> should be linked statically when you make a static build, and linked
>> dynamically by default (or when it's clearly stated by configure or m4
>> macro that static libexpat is needed). I don't see any of that here
>> (though i have to admit that gdb configure system is one big mystery).
>
> The problem is with lib-link.m4:AC_LIB_HAVE_LINKFLAGS macro and the old
> config.rpath at the top of cygnus trees (binutils, gcc, gdb, cygwin, newlib).
> Either use the attached patch when building any of these packages, or
> configure then with --without-libiconv-prefix --without-libintl-prefix (and
> for gdb, --without-libexpat-prefix).
>
>
> Yaakov
> Cygwin Ports
>
I configure gdb like:
../gdb/configure \
CFLAGS="-O0 -g" \
--prefix=/mingw \
--host=mingw32 \
--build=mingw32 \
--target=mingw32 \
--with-python=/python/python \
--with-expat \
--disable-nls
I build iconv, zlib, expat library with --enable-static --disable-shared
option, and install them to /mingw, so I think your patch is not necessary in
my case, right?
I build gdb very often with such option, and it works OK with an old MinGW-w64
GCC 4.6.3, the failure happens when I try to build gdb with
mingw-builds\x32-4.8.1-posix-dwarf-rev5
I see the symbol __time32 is in the msvcrt library, here is the result:
$ nm -A --defined-only /mingw/i686-w64-mingw32/lib/*.a | grep "_time32"
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
100.a:dcrfs01238.o:00000000 I __imp___time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
100.a:dcrfs01238.o:00000000 T __time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
110.a:dkhfs01310.o:00000000 I __imp___time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
110.a:dkhfs01310.o:00000000 T __time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
80.a:dkbgs00593.o:00000000 I __imp___time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
80.a:dkbgs00593.o:00000000 T __time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
90.a:daacs01070.o:00000000 I __imp___time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
90.a:daacs01070.o:00000000 T __time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
90d.a:dgpbs01133.o:00000000 I __imp___time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
90d.a:dgpbs01133.o:00000000 T __time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
t.a:desfs01239.o:00000000 I __imp___time32
D:/mingw-builds/x32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libmsvcr
t.a:desfs01239.o:00000000 T __time32
D:\mingw-builds\x32-4.8.1-posix-dwarf-rev5\mingw32\bin\nm.exe: D:/mingw-builds/x
32-4.8.1-posix-dwarf-rev5/mingw32/i686-w64-mingw32/lib/libruntimeobject.a: File
format not recognized
BTW: the below code build successfully
#include <time.h>
int main() {
time_t t;
_time32(&t);
}
I'm not sure the failure reason of detecting expat library in gdb.
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