----- Original Message -----
From: "Brian Dessent" <[EMAIL PROTECTED]>
.
.
Please post the entire link command and not just the error. It's
impossible to say what the true nature of the problem is otherwise. For
example, if you're trying to link a library and not an executable then
the above error would be due to missing the "-shared" flag.
For the failure in question (ie the WinMain error), I start by running 'perl
Makefile.PL LD="g++"'.
This means that both CC and LD have been set to g++. The failing link
command is:
###################################
g++ -s -L/usr/local/lib Size.o -o blib/arch/auto/Devel/Size/Size.dll \
/usr/lib/perl5/5.8/cygwin/CORE/libperl.dll.a \
/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../libcygwin.a(libcmain.o):(.text+0xab):
undefined reference to [EMAIL PROTECTED]'
collect2: ld returned 1 exit status
make: *** [blib/arch/auto/Devel/Size/Size.dll] Error 1
###################################
If I start by running simply 'perl Makefile.PL', then CC is set to g++, but
LD is set to ld2 (gcc).
The error is:
###################################
ld2 -s -L/usr/local/lib Size.o -o blib/arch/auto/Devel/Size/Size.dll \
/usr/lib/perl5/5.8/cygwin/CORE/libperl.dll.a \
gcc -shared -o
Size.dll -Wl,--out-implib=libSize.dll.a -Wl,--export-all-symbols -Wl,--enable-auto-import
-Wl,--stack,8388608 -Wl,--enable-auto-image-base -s -L/usr/local/lib Size.o
/usr/lib/perl5/5.8/cygwin/CORE/libperl.dll.a
Size.o:Size.c:(.text+0x122): undefined reference to `___gxx_personality_sj0'
Size.o:Size.c:(.text+0x21b): undefined reference to `___cxa_begin_catch'
Size.o:Size.c:(.text+0x24b): undefined reference to `___cxa_end_catch'
[followed by more undefined references to the same symbols]
###################################
If I start by running 'perl Makefile.PL LIBS="-lstdc++"', then everything
proceeds fine - but only because I've hacked $Config{libpth} to include the
location of libstdc++.a. The same section of the build output is:
###################################
ld2 -s -L/usr/local/lib Size.o -o blib/arch/auto/Devel/Size/Size.dll \
/usr/lib/perl5/5.8/cygwin/CORE/libperl.dll.a -lstdc++ \
gcc -shared -o
Size.dll -Wl,--out-implib=libSize.dll.a -Wl,--export-all-symbols -Wl,--enable-auto-import
-Wl,--stack,8388608 -Wl,--enable-auto-image-base \
-s -L/usr/local/lib Size.o
/usr/lib/perl5/5.8/cygwin/CORE/libperl.dll.a -lstdc++
Creating library file: libSize.dll.a
mv Size.dll libSize.dll.a blib/arch/auto/Devel/Size/
chmod 755 blib/arch/auto/Devel/Size/Size.dll
cp Size.bs blib/arch/auto/Devel/Size/Size.bs
chmod 644 blib/arch/auto/Devel/Size/Size.bs
/usr/bin/perl.exe "-MExtUtils::Command::MM" "-e" "test_harness(0,
'blib/lib', 'blib/arch')" t/*.t
t/basic......ok
t/pod........ok
t/pod_cov....ok
t/recurse....ok
All tests successful.
Files=4, Tests=69, 2 wallclock secs ( 0.93 cusr + 0.73 csys = 1.66 CPU)
###################################
But you're right, of course, about the missing "-shared" being a (the?)
problem. If I start with 'perl Makefile.PL LD="g++ -shared"' then everything
works fine:
###################################
g++ -shared -s -L/usr/local/lib Size.o -o
blib/arch/auto/Devel/Size/Size.dll \
/usr/lib/perl5/5.8/cygwin/CORE/libperl.dll.a \
chmod 755 blib/arch/auto/Devel/Size/Size.dll
cp Size.bs blib/arch/auto/Devel/Size/Size.bs
chmod 644 blib/arch/auto/Devel/Size/Size.bs
/usr/bin/perl.exe "-MExtUtils::Command::MM" "-e" "test_harness(0,
'blib/lib', 'blib/arch')" t/*.t
t/basic......ok
t/pod........ok
t/pod_cov....ok
t/recurse....ok
All tests successful.
Files=4, Tests=69, 3 wallclock secs ( 0.93 cusr + 0.79 csys = 1.72 CPU)
###################################
Apparently g++ needs a "-shared" but ld2 doesn't. (I don't understand that.)
And I don't understand what is achieved by:
gcc -shared -o
Size.dll -Wl,--out-implib=libSize.dll.a -Wl,--export-all-symbols -Wl,--enable-auto-import
-Wl,--stack,8388608 -Wl,--enable-auto-image-base \
-s -L/usr/local/lib Size.o /usr/lib/perl5/5.8/cygwin/CORE/libperl.dll.a
That command gets run only if LD is ld2 - there doesn't seem to be a
comparable command if LD is set to either "g++" or "g++ -shared".
Cheers,
Rob
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