Hi all, I use GCC 2.95.2 (sparc-leon2, for cygwin) in my win2k platform. Recently I encountered a problem on the C preprocessor (error messages go as follows). source1.c: In function `_my_function1': source1.c:185: `DEFINE_SYMBOL_NUM_001' undeclared (first use in this function) source1.c:185: (Each undeclared identifier is reported only once source1.c:185: for each function it appears in.) make[1]: *** [OBJS/source1.o] Error 1 This file, source1.c, is built in a directory "Src_235a". If I change its name into "Src_235b", "Src_236a", or something different, this error will be gone. This looks funny -- if I change the name of directory, or change the name of some header file (defines that lost symbol), the compiling goes okay. I added flags -H and -v in my CFLAGS and got the internal calling contents of CPP (listed below): /opt/rtems/lib/gcc-lib/sparc-rtems/2.95.2/cpp.exe -lang-c -v -I /ecos-c/Prj/product/ecos_build/leon_release_install/include -D__GNUC__=2 -D__GNUC_MINOR__=95 -Dsparc -D__GCC_NEW_VARARGS__ -Drtems -D__rtems__ -D__sparc__ -D__GCC_NEW_VARARGS__ -D__rtems__ -D__rtems__ -D__sparc -D__rtems -Asystem(rtems) -Acpu(sparc) -Amachine(sparc) -D__OPTIMIZE_SIZE__ -D__OPTIMIZE__ -g -Wall -Wpointer-arith -Wstrict-prototypes -Winline -Wundef -Woverloaded-virtual -H -D__GCC_NEW_VARARGS__ -Acpu(sparc) -Amachine(sparc) -Asystem(embedded) -D__leon__ -Dleon -DROMCODE source1.c Then I did some trials. 1. If I call CPP directly and use no arguments, I will get consistent results for both directory "Src_235a" and "Src_235b". 2. If I call CPP using full arguments (as listed above), the dump results go different: the "Src_235a" one doesn't include that header file (defines symbol DEFINE_SYMBOL_NUM_001), and the other includes correctly. This problem can be traced till here (in CPP-level). If I duplicate the same directory hierarchy in another win2k PC (and also use the same LECCS-1.1.5 toolchain), it works fine and no such odd problem. I also tried to update cygwin libraries/DLLs and that didn't help. Do you have any idea to fingure out what's wrong with such a problem? Tommy.
