Remove -fgnu89-inline configure test

[Joseph Myers <joseph at codesourcery dot com>]

There is a configure test for -fgnu89-inline.  This option was added
in GCC 4.2, so the test is obsolete; this patch removes it.

Tested for x86_64 (testsuite, and that installed shared libraries are
unchanged by the patch).

2015-10-16  Joseph Myers  <joseph@codesourcery.com>

	* configure.ac (libc_cv_gnu89_inline): Remove configure test.
	* configure: Regenerated.
	* config.make.in (gnu89-inline-CFLAGS): Remove variable.
	* Makeconfig (CFLAGS): Use -fgnu89-inline instead of
	$(gnu89-inline-CFLAGS).

diff --git a/Makeconfig b/Makeconfig
index a03db7f..1dc522c 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -884,7 +884,7 @@ CPPFLAGS = $(config-extra-cppflags) $(CPPUNDEFS) $(CPPFLAGS-config) \
 	   $(foreach lib,$(libof-$(basename $(@F))) \
 			 $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
 	   $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
-override CFLAGS	= -std=gnu99 $(gnu89-inline-CFLAGS) $(config-extra-cflags) \
+override CFLAGS	= -std=gnu99 -fgnu89-inline $(config-extra-cflags) \
 		  $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
 		  $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
 		  $(CFLAGS-$(@F)) $(tls-model) \
diff --git a/config.make.in b/config.make.in
index 44a874d..7f561eb 100644
--- a/config.make.in
+++ b/config.make.in
@@ -56,7 +56,6 @@ old-glibc-headers = @old_glibc_headers@
 unwind-find-fde = @libc_cv_gcc_unwind_find_fde@
 have-forced-unwind = @libc_cv_forced_unwind@
 have-fpie = @libc_cv_fpie@
-gnu89-inline-CFLAGS = @gnu89_inline@
 have-ssp = @libc_cv_ssp@
 have-selinux = @have_selinux@
 have-libaudit = @have_libaudit@
diff --git a/configure b/configure
index d4cb9cd..2518867 100755
--- a/configure
+++ b/configure
@@ -621,7 +621,6 @@ LIBGD
 libc_cv_cc_loop_to_function
 libc_cv_cc_submachine
 libc_cv_cc_nofma
-gnu89_inline
 libc_cv_ssp
 fno_unit_at_a_time
 libc_cv_output_format
@@ -6053,42 +6052,6 @@ fi
 $as_echo "$libc_cv_ssp" >&6; }
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fgnu89-inline" >&5
-$as_echo_n "checking for -fgnu89-inline... " >&6; }
-if ${libc_cv_gnu89_inline+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat > conftest.c <<EOF
-int foo;
-#ifdef __GNUC_GNU_INLINE__
-main () { return 0;}
-#else
-#error
-#endif
-EOF
-if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
-			    -o conftest.s conftest.c 1>&5'
-  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }
-then
-  libc_cv_gnu89_inline=yes
-else
-  libc_cv_gnu89_inline=no
-fi
-rm -f conftest*
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gnu89_inline" >&5
-$as_echo "$libc_cv_gnu89_inline" >&6; }
-if test $libc_cv_gnu89_inline = yes; then
-  gnu89_inline=-fgnu89-inline
-else
-  gnu89_inline=
-fi
-
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether cc puts quotes around section names" >&5
 $as_echo_n "checking whether cc puts quotes around section names... " >&6; }
 if ${libc_cv_have_section_quotes+:} false; then :
diff --git a/configure.ac b/configure.ac
index 402de30..703ce06 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1505,30 +1505,6 @@ LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector],
 ])
 AC_SUBST(libc_cv_ssp)
 
-AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
-cat > conftest.c <<EOF
-int foo;
-#ifdef __GNUC_GNU_INLINE__
-main () { return 0;}
-#else
-#error
-#endif
-EOF
-if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
-			    -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
-then
-  libc_cv_gnu89_inline=yes
-else
-  libc_cv_gnu89_inline=no
-fi
-rm -f conftest*])
-if test $libc_cv_gnu89_inline = yes; then
-  gnu89_inline=-fgnu89-inline
-else
-  gnu89_inline=
-fi
-AC_SUBST(gnu89_inline)
-
 AC_CACHE_CHECK(whether cc puts quotes around section names,
 	       libc_cv_have_section_quotes,
 	       [cat > conftest.c <<EOF

-- 
Joseph S. Myers
joseph@codesourcery.com