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Using libtool via autotools causes linking problem on mingw


From: Panicz Maciej Godek
Subject: Using libtool via autotools causes linking problem on mingw
Date: Thu, 7 Nov 2013 22:00:14 +0100

Hi,
For some time I've been trying to compile my framework
for writing multimedia and 3d games in Guile Scheme
on Windows/MinGW.
The framework uses SDL library, and more details can be
found here: https://puszcza.gnu.org.ua/projects/slayer

After many issues with compiling Guile Scheme on MinGW,
I've finally managed to achieve it, and having build SDL,
I proceeded to compile my framework.

Although I did use the autotools to create a package,
I know only superficially how it is supposed to work.
Having ./configured my project, I managed to build the
object files, but the final linking (performed by libtool)
fails. It is invoked in the following way:

./libtool --tag=CXX   --mode=link g++ -D_GNU_SOURCE=1 -Dmain=SDL_main -Ic:/mingw/msys/1.0/include/SDL   -Ic:/mingw/msys/1.0/include/guile/2.0 -I/usr/local/include -Ic:/mingw/msys/1.0/include    -Wall -Werror -mwindows -Lc:/mingw/msys/1.0/lib -lmingw32 -lSDLmain -lSDL   -Lc:/mingw/msys/1.0/lib -lguile-2.0 -lgc     -mwindows -Lc:/mingw/msys/1.0/lib -lSDL_image -lmingw32 -lSDLmain -lSDL   -g -O2 -mwindows -Lc:/mingw/msys/1.0/lib -lmingw32 -lSDLmain -lSDL   -Lc:/mingw/msys/1.0/lib -lguile-2.0 -lgc     -mwindows -Lc:/mingw/msys/1.0/lib -lSDL_image -lmingw32 -lSDLmain -lSDL    -o slayer.exe file.o font.o image.o input.o slayer.o symbols.o video.o    -lSDL_ttf 

and the following error appears:
c:/mingw/msys/1.0/lib/libmingw32.a(main.o): In function `main':
e:\p\giaw\src\pkg\mingwrt-4.0.3-1-mingw32-src\bld/../mingwrt-4.0.3-1-mingw32-src/src/libcrt/crt/main.c:91: undefined reference to address@hidden'
collect2.exe: error: ld returned 1 exit status

However, I do manage to build the executable with the following command:
gcc -o slayer.exe file.o font.o image.o input.o slayer.o symbols.o video.o -mwindows -lmingw32 -lSDLmain -lSDL -lSDL_image -lSDL_ttf -lguile-2.0

(there are still some problems caused by libguile in the runtime, but at least the linkign stage succeeds)

I know that it might be a complicated issue, and the cause might lie on the side of either MinGW or SDL or pkg-config or autotools or mine, but I thought it might be best to ask you first.

The project's files can be browsed here
http://hg.gnu.org.ua/hgweb/slayer/file/bb4c97fd8329

Thanks in advance,
M.


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