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Date: Tue, 11 Nov 2008 11:32:44 +0100 (CET)
Subject: Re: Cannot compile UUID module
From: "Alexander Stadler" <sa DOT maillists AT univie DOT ac DOT at>
To: cygwin AT cygwin DOT com
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>> gcc -c   -DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -fno-strict-aliasing
>> -pipe -I/
>> usr/local/include -DUSEIMPORTLIB -O3   -DVERSION=\"0.02\"
>> -DXS_VERSION=\"0.02\"
>>  "-I/usr/lib/perl5/5.10/i686-cygwin/CORE"   UUID.c
>> rm -f blib/arch/auto/UUID/UUID.dll
>> g++  --shared  -Wl,--enable-auto-import -Wl,--export-all-symbols
>> -Wl,--stack,838
>> 8608 -Wl,--enable-auto-image-base -L/usr/local/lib -L/usr/lib/e2fsprogs
>> -Wl,-Bst
>> atic -luuid -Wl,-Bdynamic UUID.o  -o blib/arch/auto/UUID/UUID.dll
>> \
>>           /usr/lib/perl5/5.10/i686-cygwin/CORE/libperl.dll.a    \
>>
>> UUID.o:UUID.c:(.text+0xe): undefined reference to `_uuid_generate'
>
> The ordering here is wrong.  -luuid must come after UUID.o on the
> command line if the linker is to resolve uuid_* symbols in UUID.o from
> the -luuid library.
>
> With standard autoconf this is achieved by the convention that -l
> arguments must go in LIBS not LDFLAGS.  I don't know if the perl system
> uses the same convention, but whatever it uses, the -luuid argument does
> not belong where it's currently being set.
>
> Brian

Thank you so very much!
You were right, it is a solution to change to the right order by manually
executing:

g++  --shared  -Wl,--enable-auto-import -Wl,--export-all-symbols
-Wl,--stack,8388608 -Wl,--enable-auto-image-base -L/usr/local/lib
-L/usr/lib/e2fsprogs UUID.o -luuid -o blib/arch/auto/UUID/UUID.dll
/usr/lib/perl5/5.10/i686-cygwin/CORE/libperl.dll.a

So my next question is: Do you know what parameters are needed so that the
Makefile will be created with the right settings (without manually
executing g++ after the crashed first make)?

Because creating it with:
perl Makefile.PL LIBS=-L/usr/lib/e2fsprogs

results to the not functioning g++ line without ... -L/usr/lib/e2fsprogs
UUID.o -luuid ... (which was the reason for (unfortunately) false editing
of the Makefile).

At the beginning I can even see:
...
MakeMaker ARGV: (q[LIBS=-L/usr/lib/e2fsprogs])
...
#     LIBS => [q[-luuid]]
...

But it does not seem to affect the g++ call.

And by the way, in the PostgreSQL posts dllwrap was used with
-Wl,-Bstatic,-luuid,-Bdynamic so when do I need the -Bstatic, -Bdynamic
and should I use it too?

Thank you

Alex


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