[Bug target/40411] -std=c99 does not enable c99 mode in Solaris C library

["bruno at clisp dot org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40411

bruno at clisp dot org changed:

           What    |Removed                     |Added
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                 CC|                            |bruno at clisp dot org

--- Comment #17 from bruno at clisp dot org 2010-12-26 18:06:15 UTC ---
Note that the use of values-xpg6.o leads to unexpected behaviour when
considering shared libraries:

1) The behaviour of a shared library also depends on whether the executable
is linked with or without values-xpg6.o. The author of the shared library
may not expect this and may not have tested in this situation.

2) The behaviour of an executable also depends on whether some of the shared
libraries was built with values-xpg6.o. The author of the program may not
expect this. This leads to real bugs:
<http://lists.gnu.org/archive/html/autoconf/2010-02/msg00013.html>

More details in
<http://lists.gnu.org/archive/html/autoconf/2010-12/msg00059.html>

For this reason, I would find it bad if "gcc -std=c99" or "gcc -std=gnu99"
would cause values-xpg6.o to be included in the link. Please close this
issue as "Won't fix". Programs which wish to have POSIX compliant behaviour
of system functions can use GNU gnulib; it doesn't rely on values-xpg6.o.