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Re: FreeBSD port (37): avoiding dependencies towards /usr/include
- From: Roland McGrath <roland at redhat dot com>
- To: Bruno Haible <bruno at clisp dot org>
- Cc: Roland McGrath <roland at frob dot com>, libc-alpha at sources dot redhat dot com
- Date: Fri, 6 Sep 2002 12:15:24 -0700
- Subject: Re: FreeBSD port (37): avoiding dependencies towards /usr/include
- References: <email@example.com>
> On FreeBSD, configure is called without --with-headers option.
That is the normal state on all platforms.
> Why? Any #include <limits.h>
> includes glibc-xxxx/include/limits.h
> which does #include_next gcc-3.2's private include/limits.h
> which does #include_next /usr/include/limits.h.
Something is wrong if this happens. GCC's limits.h does not use #include_next
unless _GCC_NEXT_LIMITS_H is defined. The only place that defines that is
GCC's syslimits.h, which is not used under _LIBC_LIMITS_H. Perhaps your
GCC installation is different from mine somehow, but if so I think that
is where the problem lies.
> Here is a fix.
That change is completely wrong. Without that -isystem flag, GCC's own
files will not be found as they should. Things like float.h and stdarg.h
must come from GCC.