libgo/configure: remove -fno-section-anchors for AIX

This option is no longer needed. There is no crash without it since
at least gcc-9.

Change-Id: I1f55cf8cbff3ce00eed2d701f4c599381d0936fa
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/260157
Trust: Than McIntosh <thanm@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

libgo/configure

diff --git a/libgo/configure b/libgo/configure
index 641d060..792ac6f 100755
--- a/libgo/configure
+++ b/libgo/configure
@@ -4711,10 +4711,6 @@
 
 case ${host} in
   *-*-aix*)
-    # static hash tables crashes on AIX when libgo is built with O2
-    CFLAGS="$CFLAGS -fno-section-anchors"
-    GOCFLAGS="$GOCFLAGS -fno-section-anchors"
-
     # Check default architecture for FAT library creation
     if test -z "`$CC -x c -E /dev/null -g3 -o - | grep 64BIT`" ; then
         AIX_EXTRA_ARCH='64'
@@ -11501,7 +11497,7 @@
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11504 "configure"
+#line 11500 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11607,7 +11603,7 @@
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11610 "configure"
+#line 11606 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H

libgo/configure.ac

diff --git a/libgo/configure.ac b/libgo/configure.ac
index f15f8d8..9a10d33 100644
--- a/libgo/configure.ac
+++ b/libgo/configure.ac
@@ -33,10 +33,6 @@
 
 case ${host} in
   *-*-aix*)
-    # static hash tables crashes on AIX when libgo is built with O2
-    CFLAGS="$CFLAGS -fno-section-anchors"
-    GOCFLAGS="$GOCFLAGS -fno-section-anchors"
-
     # Check default architecture for FAT library creation
     if test -z "`$CC -x c -E /dev/null -g3 -o - | grep 64BIT`" ; then
         AIX_EXTRA_ARCH='64'