On Mon, May 5, 2008 at 8:49 PM, Bill Hoffman <[EMAIL PROTECTED]> wrote: > > Mathieu Malaterre wrote: > > > Ok. I do not understand how to use cl, I switch to using gcc instead > > (cygwin). Here it is again: > > > > > > /usr/local/bin/gcc.exe -DCHECK_FUNCTION_EXISTS=UuidCreate -o > > CMakeFiles/cmTryCompileExec.dir/CheckFunctionExists.o -c > > /usr/share/cmake-2.4.8/Modules/CheckFunctionExists.c > > Linking C executable cmTryCompileExec.exe > > /usr/bin/cmake.exe -P > CMakeFiles/cmTryCompileExec.dir/cmake_clean_target.cmake > > /usr/local/bin/gcc.exe -DCHECK_FUNCTION_EXISTS=UuidCreate > > "CMakeFiles/cmTryCompileExec.dir/CheckFunctionExists.o" -o > > cmTryCompileExec.exe > > -Wl,--major-image-version,0,--minor-image-version,0 -lrpcrt4 > > > CMakeFiles/cmTryCompileExec.dir/CheckFunctionExists.o:CheckFunctionExists.c:(.text+0x1a): > > undefined reference to `_UuidCreate' > > collect2: ld returned 1 exit status > > make[1]: Leaving directory > > `/home/mmalaterre/Projects/gdcm/debug-gcc422/CMakeFiles/CMakeTmp' > > make[1]: *** [cmTryCompileExec.exe] Error 1 > > make: *** [cmTryCompileExec/fast] Error 2 > > > > > > where is the '_' coming from ? Is this something standard to gcc ? > > > > > > Standard for C compilers to add _ infront of any symbol. > > 1. Use --debug-trycompile. > 2. Get the source code out created in --debug-trycompile run > 3. try to compiple the source code by hand cl CheckFunctionExists.c > rpcrt4.lib or gcc CheckFunctionExists.c -lrpcrt4. > 4. look at the code in CheckFunctionExists.c > > If I had to guess, I would say CheckFunctionExists.c forward declares a C > function, and that UuidCreate is somehow a macro in windows.h
-> that's exactly what is driving me nuts, CheckFunctionExists.c is a 5 line c code, it forward declare the function but does not include *anything*. And I can confirm that compilation by hand works: /usr/local/bin/gcc.exe -DCHECK_FUNCTION_EXISTS=UuidCreate -o foo.o -c /usr/share/cmake-2.4.8/Modules/CheckFunctionExists.c ... -- Mathieu _______________________________________________ CMake mailing list [email protected] http://www.cmake.org/mailman/listinfo/cmake
