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Re: Bug in GNU CPP option handling (gcc-2.95.[123])
- To: Peter Breitenlohner <peb at mppmu dot mpg dot de>
- Subject: Re: Bug in GNU CPP option handling (gcc-2.95.[123])
- From: Neil Booth <neil at daikokuya dot demon dot co dot uk>
- Date: Tue, 8 May 2001 19:12:54 +0100
- Cc: gcc-bugs at gcc dot gnu dot org
- References: <Pine.LNX.4.21.0105081912320.17173-100000@pcl321.mppmu.mpg.de>
Peter Breitenlohner wrote:-
> Contrary to what the cpp man-page, cpp.info, as well as 'cpp --help'
> say, cpp (from gcc-2.95.1, .2, and .3) does NOT accept the option
> '-undef'!! (for ix86-linux-gnu).
Hmm. 2.95 works for me; though I agree the documentation about its
effects is not particularly clear (or accurate):-
monkey:gcc{17}$ /usr/bin/cpp-2.95 -undef -v /dev/null
Reading specs from /usr/lib/gcc-lib/i386-linux/2.95.4/specs
gcc version 2.95.4 20010502 (Debian prerelease)
/usr/lib/gcc-lib/i386-linux/2.95.4/cpp0 -lang-c -v -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386__ /dev/null
GNU CPP version 2.95.4 20010502 (Debian prerelease) (i386 Linux/ELF)
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/usr/lib/gcc-lib/i386-linux/2.95.4/include
/usr/include
End of search list.
The following default directories have been omitted from the search path:
/usr/lib/gcc-lib/i386-linux/2.95.4/../../../../include/g++-3
/usr/lib/gcc-lib/i386-linux/2.95.4/../../../../i386-linux/include
End of omitted list.
# 1 "/dev/null"
monkey:gcc{18}$ /usr/bin/cpp-2.95 -v /dev/null
Reading specs from /usr/lib/gcc-lib/i386-linux/2.95.4/specs
gcc version 2.95.4 20010502 (Debian prerelease)
/usr/lib/gcc-lib/i386-linux/2.95.4/cpp0 -lang-c -v -D__ELF__ -Dunix -D__i386__ -Dlinux -D__ELF__ -D__unix__ -D__i386__ -D__linux__ -D__unix -D__linux -Asystem(posix) -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386__ /dev/null
GNU CPP version 2.95.4 20010502 (Debian prerelease) (i386 Linux/ELF)
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/usr/lib/gcc-lib/i386-linux/2.95.4/include
/usr/include
End of search list.
The following default directories have been omitted from the search path:
/usr/lib/gcc-lib/i386-linux/2.95.4/../../../../include/g++-3
/usr/lib/gcc-lib/i386-linux/2.95.4/../../../../i386-linux/include
End of omitted list.
# 1 "/dev/null"
monkey:gcc{19}$
Note the set of predefined macros is different.
Neil.