Does anyone else see several dozen
warning: #pragma system_header ignored outside include file
warnings when building Errno with gcc?
I see it on Win32 (MinGW -- gcc 3.2.3). It never used to happen, but
does as of change 23806 which filled in $Config{gccversion} and thus
causes Errno_pm.PL to scan the output of "gcc -E -dM" on each header
file, rather than scanning each header file directly.
Under MinGW running
gcc -E -dM -DWIN32 C:/MinGW/include/windows.h
emits
C:/MinGW/include/windows.h:16:13: warning: #pragma system_header ignored
outside include file
on stderr. The windows.h header file (and many others) includes the lines
#if __GNUC__ >=3
#pragma GCC system_header
#endif
Is there any way to suppress these warnings?
If not then what is best to do? I could revert to scanning the files
directly rather than using "gcc -E -dM" (but that sounds like a step
backwards) or I could send stderr to the null device (but that sounds
potentially dangerous -- people may miss something genuinely relevant).
Any other ideas?
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