[Mingw-users] OpenGL - undefined reference to `glInitNames' and libopengl32 vs libgl

[Thoralf S. <tho...@ya...>]

hi there,

I'm currently trying to compile gem for pd (see
http://gem.iem.at)  with mingw. My setup is MinGW
5.0.0, MSys 1.0.10 nd autoconf 2.59.
While doing the ./configure step, this software checks
if opengl is installed by looking for libGL.
Naturally, this test fails on mingw, because there is
no such lib.
Since I don't want to tamper with the makefile (yet),
I copied libopengl32.a in the lib directory of the
mingw installation to libGL.a . This fails too, there
seems to be something wrong with libopengl32 and its
headers:

--config.log---

configure:5321: checking for glInitNames in -lGL
configure:5351: gcc -o conftest.exe -g -O2
-I/mingw/include:/mingw/include/GL:/mingw/include/ftgl
-I/c/Programme/pd/src -L/mingw/lib conftest.c -lGL 
-lm   >&5
C:/DOKUME~1/VJ/LOKALE~1/Temp/ccwtaaaa.o(.text+0x19):
In function `main':
c:/dev/Gem/src/conftest.c:25: undefined reference to
`glInitNames'
collect2: ld returned 1 exit status
configure:5357: $? = 1
configure: failed program was:
| /* confdefs.h.  */
| 
| #define PACKAGE_NAME "FULL-PACKAGE-NAME"
| #define PACKAGE_TARNAME "full-package-name"
| #define PACKAGE_VERSION "VERSION"
| #define PACKAGE_STRING "FULL-PACKAGE-NAME VERSION"
| #define PACKAGE_BUGREPORT "BUG-REPORT-ADDRESS"
| #ifdef __cplusplus
| extern "C" void std::exit (int) throw (); using
std::exit;
| #endif
| #define HAVE_LIBM 1
| #define X_DISPLAY_MISSING 1
| /* end confdefs.h.  */
| 
| /* Override any gcc2 internal prototype to avoid an
error.  */
| #ifdef __cplusplus
| extern "C"
| #endif
| /* We use char because int might match the return
type of a gcc2
|    builtin and then its argument prototype would
still apply.  */
| char glInitNames ();
| int
| main ()
| {
| glInitNames ();
|   ;
|   return 0;
| }
configure:5383: result: no 

Now I'm wondering how I could obtain a working gl.h /
libopengl32.a combination. Should I compile mesa?

thank you for your help,
thoralf.


		
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