[Bug libc/9710] New: libc_cv_gnu89_inline goes invalid if read from config.cache

["glen at delfi dot ee" <sourceware-bugzilla at sourceware dot org>]

stat.c:50: error: redefinition of '__stat'
../include/sys/stat.h:23: error: previous definition of '__stat' was here
make[2]: *** 
[/home/users/glen/rpm/BUILD.i686-linux/glibc-2.9/builddir/io/stat.op] Error 1

this happens because if config.cache is used (for the second time), the value 
which is detected as "yes" is written as "-fgnu89-inline" into cache, and 
fetched with that value later, thus remaining not set.

configure:6632: checking for -fgnu89-inline
configure:6659: result: -fgnu89-inline

it's because such fragment from configure.in:

if test $libc_cv_gnu89_inline = yes; then
  libc_cv_gnu89_inline=-fgnu89-inline
else
  libc_cv_gnu89_inline=
fi
AC_SUBST(libc_cv_gnu89_inline)

likely proper fix is to use different variable in configure and in cache, but i 
wrote such one which will work too:
http://cvs.pld-linux.org/cgi-bin/cvsweb.cgi/SOURCES/glibc-cv_gnu89_inline.patch

i checked this code is present in HEAD too as of now:
http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/configure.in?annotate=1.480&cvsroot=glibc&only_with_tag=MAIN

-- 
           Summary: libc_cv_gnu89_inline goes invalid if read from
                    config.cache
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: glen at delfi dot ee
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=9710

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