D:\devsoft\ccode\c>gcc -o interp.exe  d:/devsoft/ccode/c/interp.c --verbose  -lm  -I d:/devsoft/perl
/lib/CORE
Reading specs from d:/djgpp/lib/gcc-lib/djgpp/2.952/specs
gcc version 2.95.2 19991024 (release)
 d:/djgpp/lib/gcc-lib/djgpp/2.952/cpp.exe -lang-c -v -I d:/devsoft/perl/lib/CORE -D__GNUC__=2 -D__GN
UC_MINOR__=95 -Dunix -Di386 -DGO32 -DDJGPP=2 -DMSDOS -D__unix__ -D__i386__ -D__GO32__ -D__DJGPP__=2
-D__MSDOS__ -D__unix -D__i386 -D__GO32 -D__DJGPP=2 -D__MSDOS -Asystem(unix) -Asystem(msdos) -Acpu(i3
86) -Amachine(i386) -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386__ -D__tune_pentium__ -imacr
os d:/djgpp/lib/../include/sys/version.h -remap d:/devsoft/ccode/c/interp.c d:/djgpp/tmp\cc8Kbifp.i
GNU CPP version 2.95.2 19991024 (release) (80386, BSD syntax)
#include "..." search starts here:
#include <...> search starts here:
 d:/devsoft/perl/lib/CORE
 d:/djgpp/include
 d:/djgpp/lib/gcc-lib/djgpp/2.952/include
 d:/djgpp/include
End of search list.
The following default directories have been omitted from the search path:
 $DJDIR/lang/cxx
 $DJDIR/lib/gcc-lib/djgpp/2.952/../../../../djgpp/include
End of omitted list.
In file included from d:/devsoft/ccode/c/interp.c:12:
d:/devsoft/perl/lib/CORE/perl.h:3317: patchlevel.h: No such file or directory (ENOENT)