Remove -Bgroup configure test.

There is a configure test for the -Bgroup linker option whose results
aren't used anywhere.  This patch removes that test.

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

	* configure.ac (libc_cv_Bgroup): Remove configure test.
	* configure: Regenerated.
	* config.make.in (have-Bgroup): Remove variable.

ChangeLog

@@ -1,5 +1,9 @@
 2015-10-15  Joseph Myers  <joseph@codesourcery.com>
 
+	* configure.ac (libc_cv_Bgroup): Remove configure test.
+	* configure: Regenerated.
+	* config.make.in (have-Bgroup): Remove variable.
+
 	* configure.ac (sizeof_long_double): Remove configure test.
 	* configure: Regenerated.
 	* config.make.in (sizeof-long-double): Remove variable.

config.make.in

@@ -49,7 +49,6 @@ enable-werror = @enable_werror@
 
 have-z-combreloc = @libc_cv_z_combreloc@
 have-z-execstack = @libc_cv_z_execstack@
-have-Bgroup = @libc_cv_Bgroup@
 have-protected-data = @libc_cv_protected_data@
 with-fp = @with_fp@
 enable-timezone-tools = @enable_timezone_tools@

configure

@@ -630,7 +630,6 @@ libc_cv_fpie
 libc_cv_z_execstack
 libc_cv_z_combreloc
 ASFLAGS_config
-libc_cv_Bgroup
 libc_cv_cc_with_libunwind
 libc_cv_protected_data
 BISON
@@ -5763,33 +5762,6 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_linker_feature" >&5
 $as_echo "$libc_linker_feature" >&6; }
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -Bgroup option" >&5
-$as_echo_n "checking for -Bgroup option... " >&6; }
-if ${libc_cv_Bgroup+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat > conftest.c <<EOF
-int _start (void) { return 42; }
-EOF
-if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
-			    -fPIC -shared -o conftest.so conftest.c
-			    -Wl,-Bgroup -nostdlib 1>&5'
-  { { eval echo "\"\$as_me\":${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_Bgroup=yes
-else
-  libc_cv_Bgroup=no
-fi
-rm -f conftest*
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_Bgroup" >&5
-$as_echo "$libc_cv_Bgroup" >&6; }
-
-
 ASFLAGS_config=
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether --noexecstack is desirable for .S files" >&5
 $as_echo_n "checking whether --noexecstack is desirable for .S files... " >&6; }

configure.ac

@@ -1336,22 +1336,6 @@ LIBC_LINKER_FEATURE([-z initfirst], [-Wl,--enable-new-dtags,-z,initfirst],
 		    [libc_cv_z_initfirst=yes],
 		    [AC_MSG_ERROR(linker with -z initfirst support required)])
 
-AC_CACHE_CHECK(for -Bgroup option,
-	       libc_cv_Bgroup, [dnl
-cat > conftest.c <<EOF
-int _start (void) { return 42; }
-EOF
-if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
-			    -fPIC -shared -o conftest.so conftest.c
-			    -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
-then
-  libc_cv_Bgroup=yes
-else
-  libc_cv_Bgroup=no
-fi
-rm -f conftest*])
-AC_SUBST(libc_cv_Bgroup)
-
 ASFLAGS_config=
 AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
 	       libc_cv_as_noexecstack, [dnl