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dllwrap and excluded symbols
- To: cygwin at sources dot redhat dot com
- Subject: dllwrap and excluded symbols
- From: Tim Reed <timr at viaworks dot com>
- Date: Tue, 10 Oct 2000 12:02:33 -0700 (PDT)
I noticed that when I use dllwrap to make a mingw32 dll some extra args
are passed to dlltool. One of these confuses me a bit. I see that dllwrap
adds --exclude-symbol=DllMainCRTStartup@12
Here's the actuall command I'm using:
dllwrap --target=i386-mingw32 -mno-cygwin --driver-flags -O0 -g
-L/usr/local/li b/ -L/usr/local/i386-mingw32/lib/ -lmsvcrt -lwsock32 -static
-mno-cygwin -v -H -liberty --export-all --output-def viaworks.def
--driver-name gcc -o viaworks.dll $(OBJS) -lwsock32 -lmsvcrt
Upon executing this I get some warnings like:
dlltool: Excluding symbol: DllMainCRTStartup@12
dlltool: Excluding symbol: _cygwin_dll_entry@12
dlltool: Excluding symbol: DllMainCRTStartup@12
dlltool: Excluding symbol: DllMain@12
dlltool: Excluding symbol: DllEntryPoint@12
and
/usr/bin/ld: warning: cannot find entry symbol _DllMainCRTStartup@12;
defaulting to 66cc1000
Why is this excluded from the dll? Won't the mingw32 dll I'm compiling
want to load in the C runtime code?
Is there a way to force the function to be added to the dll?
How does a mingw32 compiled dll load in the C runtime environment, or any
other dll it needs?
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