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Date: Wed, 21 Aug 2002 02:53:43 +0200
From: "Gerrit P. Haase" <gp AT familiehaase DOT de>
Reply-To: "Gerrit @ cygwin" <cygwin AT cygwin DOT com>
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Message-ID: <187380682792.20020821025343@familiehaase.de>
To: Lostmind <lostmind AT gmx DOT net>
CC: cygwin AT cygwin DOT com
Subject: Re: Problems exporting my DLL functions...
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Hallo Lostmind,

Am Dienstag, 20. August 2002 um 22:41 schriebst du:

>> gcc -o khook.o -c khook.o
>> gcc -shared -o mydll.dll khook.o

> Cool, it works, thanx :D

> ...at least it creates a DLL, but finally two things:

> 1. How do I tell the compiler/linker what is my DLL-init-function

I don't tell it.

> 2. How do I tell the compiler/linker which functions I want to export (I
> marked them with EXPORT in the file already, but they didn't seem to be
> available in the created DLL)

The complete syntax is:

gcc -shared -o cyg${module}.dll \
    -Wl,--out-implib=lib${module}.dll.a \
    -Wl,--export-all-symbols \
    -Wl,--enable-auto-import \
    -Wl,--whole-archive ${old_lib} \
    -Wl,--no-whole-archive ${dependency_libs}

Where ${module} is the name of your DLL, ${old_lib} are all
objectfiles, bundled together in a static lib or single object
files and the ${dependency_libs} are importlibs you need to
link against, e.g '-lpng -lz -L/usr/local/special -lmyspeciallib'

All symbols are exported then because you tell the linker to do so:
-Wl,--export-all-symbols


Gerrit
-- 
"All faults& bugs are mine - Robert"
    from squid/acinclude.m4,   Sun Apr 21 05:21:21 2002


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