+###############################################################################
+
+### use option --enable-broken-linker to force on use of broken-linker support
+
+echo "$as_me:12304: checking if you want broken-linker support code" >&5
+echo $ECHO_N "checking if you want broken-linker support code... $ECHO_C" >&6
+
+# Check whether --enable-broken_linker or --disable-broken_linker was given.
+if test "${enable_broken_linker+set}" = set; then
+ enableval="$enable_broken_linker"
+ with_broken_linker=$enableval
+else
+ with_broken_linker=no
+fi;
+echo "$as_me:12314: result: $with_broken_linker" >&5
+echo "${ECHO_T}$with_broken_linker" >&6
+
+: "${BROKEN_LINKER:=0}"
+if test "x$with_broken_linker" = xyes ; then
+
+cat >>confdefs.h <<\EOF
+#define BROKEN_LINKER 1
+EOF
+
+ BROKEN_LINKER=1
+fi
+
+# Check to define _XOPEN_SOURCE "automatically"
+
+echo "$as_me:12329: checking if the POSIX test-macros are already defined" >&5
+echo $ECHO_N "checking if the POSIX test-macros are already defined... $ECHO_C" >&6
+if test "${cf_cv_posix_visible+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+cat >"conftest.$ac_ext" <<_ACEOF
+#line 12336 "configure"
+#include "confdefs.h"
+#include <stdio.h>
+int
+main (void)
+{
+
+#if defined(__POSIX_VISIBLE) && ((__POSIX_VISIBLE - 0L) > 0) \
+ && defined(__XSI_VISIBLE) && ((__XSI_VISIBLE - 0L) > 0) \
+ && defined(__BSD_VISIBLE) && ((__BSD_VISIBLE - 0L) > 0) \
+ && defined(__ISO_C_VISIBLE) && ((__ISO_C_VISIBLE - 0L) > 0)
+#error conflicting symbols found
+#endif
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f "conftest.$ac_objext"
+if { (eval echo "$as_me:12355: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12358: \$? = $ac_status" >&5
+ (exit "$ac_status"); } &&
+ { ac_try='test -s "conftest.$ac_objext"'
+ { (eval echo "$as_me:12361: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12364: \$? = $ac_status" >&5
+ (exit "$ac_status"); }; }; then
+ cf_cv_posix_visible=no
+else
+ echo "$as_me: failed program was:" >&5
+cat "conftest.$ac_ext" >&5
+cf_cv_posix_visible=yes
+fi
+rm -f "conftest.$ac_objext" "conftest.$ac_ext"
+
+fi
+echo "$as_me:12375: result: $cf_cv_posix_visible" >&5
+echo "${ECHO_T}$cf_cv_posix_visible" >&6
+
+if test "$cf_cv_posix_visible" = no; then
+
+cf_XOPEN_SOURCE=600
+cf_POSIX_C_SOURCE=199506L
+cf_xopen_source=
+
+case "$host_os" in
+(aix[4-7]*)
+ cf_xopen_source="-D_ALL_SOURCE"
+ ;;
+(msys)
+ cf_XOPEN_SOURCE=600
+ ;;
+(darwin[0-8].*)
+ cf_xopen_source="-D_APPLE_C_SOURCE"
+ ;;
+(darwin*)
+ cf_xopen_source="-D_DARWIN_C_SOURCE"
+ cf_XOPEN_SOURCE=
+ ;;
+(freebsd*|dragonfly*|midnightbsd*)
+ # 5.x headers associate
+ # _XOPEN_SOURCE=600 with _POSIX_C_SOURCE=200112L
+ # _XOPEN_SOURCE=500 with _POSIX_C_SOURCE=199506L
+ cf_POSIX_C_SOURCE=200112L
+ cf_XOPEN_SOURCE=600
+ cf_xopen_source="-D_BSD_TYPES -D__BSD_VISIBLE -D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
+ ;;
+(hpux11*)
+ cf_xopen_source="-D_HPUX_SOURCE -D_XOPEN_SOURCE=500"
+ ;;
+(hpux*)
+ cf_xopen_source="-D_HPUX_SOURCE"
+ ;;
+(irix[56].*)
+ cf_xopen_source="-D_SGI_SOURCE"
+ cf_XOPEN_SOURCE=
+ ;;
+(linux*|uclinux*|gnu*|mint*|k*bsd*-gnu|cygwin)
+
+cf_gnu_xopen_source=$cf_XOPEN_SOURCE
+
+echo "$as_me:12420: checking if this is the GNU C library" >&5
+echo $ECHO_N "checking if this is the GNU C library... $ECHO_C" >&6
+if test "${cf_cv_gnu_library+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+cat >"conftest.$ac_ext" <<_ACEOF
+#line 12427 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+int
+main (void)
+{
+
+ #if __GLIBC__ > 0 && __GLIBC_MINOR__ >= 0
+ return 0;
+ #elif __NEWLIB__ > 0 && __NEWLIB_MINOR__ >= 0
+ return 0;
+ #else
+ # error not GNU C library
+ #endif
+ ;
+ return 0;
+}
+_ACEOF
+rm -f "conftest.$ac_objext"
+if { (eval echo "$as_me:12446: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12449: \$? = $ac_status" >&5
+ (exit "$ac_status"); } &&
+ { ac_try='test -s "conftest.$ac_objext"'
+ { (eval echo "$as_me:12452: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12455: \$? = $ac_status" >&5
+ (exit "$ac_status"); }; }; then
+ cf_cv_gnu_library=yes
+else
+ echo "$as_me: failed program was:" >&5
+cat "conftest.$ac_ext" >&5
+cf_cv_gnu_library=no
+fi
+rm -f "conftest.$ac_objext" "conftest.$ac_ext"
+
+fi
+echo "$as_me:12466: result: $cf_cv_gnu_library" >&5
+echo "${ECHO_T}$cf_cv_gnu_library" >&6
+
+if test x$cf_cv_gnu_library = xyes; then
+
+ # With glibc 2.19 (13 years after this check was begun), _DEFAULT_SOURCE
+ # was changed to help a little. newlib incorporated the change about 4
+ # years later.
+ echo "$as_me:12474: checking if _DEFAULT_SOURCE can be used as a basis" >&5
+echo $ECHO_N "checking if _DEFAULT_SOURCE can be used as a basis... $ECHO_C" >&6
+if test "${cf_cv_gnu_library_219+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+ cf_save="$CPPFLAGS"
+
+ test -n "$CPPFLAGS" && CPPFLAGS="$CPPFLAGS "
+ CPPFLAGS="${CPPFLAGS}-D_DEFAULT_SOURCE"
+
+ cat >"conftest.$ac_ext" <<_ACEOF
+#line 12486 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+int
+main (void)
+{
+
+ #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19) || (__GLIBC__ > 2)
+ return 0;
+ #elif (__NEWLIB__ == 2 && __NEWLIB_MINOR__ >= 4) || (__GLIBC__ > 3)
+ return 0;
+ #else
+ # error GNU C library __GLIBC__.__GLIBC_MINOR__ is too old
+ #endif
+ ;
+ return 0;
+}
+_ACEOF
+rm -f "conftest.$ac_objext"
+if { (eval echo "$as_me:12505: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12508: \$? = $ac_status" >&5
+ (exit "$ac_status"); } &&
+ { ac_try='test -s "conftest.$ac_objext"'
+ { (eval echo "$as_me:12511: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12514: \$? = $ac_status" >&5
+ (exit "$ac_status"); }; }; then
+ cf_cv_gnu_library_219=yes
+else
+ echo "$as_me: failed program was:" >&5
+cat "conftest.$ac_ext" >&5
+cf_cv_gnu_library_219=no
+fi
+rm -f "conftest.$ac_objext" "conftest.$ac_ext"
+ CPPFLAGS="$cf_save"
+
+fi
+echo "$as_me:12526: result: $cf_cv_gnu_library_219" >&5
+echo "${ECHO_T}$cf_cv_gnu_library_219" >&6
+
+ if test "x$cf_cv_gnu_library_219" = xyes; then
+ cf_save="$CPPFLAGS"
+ echo "$as_me:12531: checking if _XOPEN_SOURCE=$cf_gnu_xopen_source works with _DEFAULT_SOURCE" >&5
+echo $ECHO_N "checking if _XOPEN_SOURCE=$cf_gnu_xopen_source works with _DEFAULT_SOURCE... $ECHO_C" >&6
+if test "${cf_cv_gnu_dftsrc_219+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+cf_fix_cppflags=no
+cf_new_cflags=
+cf_new_cppflags=
+cf_new_extra_cppflags=
+
+for cf_add_cflags in -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=$cf_gnu_xopen_source
+do
+case "$cf_fix_cppflags" in
+(no)
+ case "$cf_add_cflags" in
+ (-undef|-nostdinc*|-I*|-D*|-U*|-E|-P|-C)
+ case "$cf_add_cflags" in
+ (-D*)
+ cf_tst_cflags=`echo "${cf_add_cflags}" |sed -e 's/^-D[^=]*='\''\"[^"]*//'`
+
+ test "x${cf_add_cflags}" != "x${cf_tst_cflags}" \
+ && test -z "${cf_tst_cflags}" \
+ && cf_fix_cppflags=yes
+
+ if test "$cf_fix_cppflags" = yes ; then
+
+ test -n "$cf_new_extra_cppflags" && cf_new_extra_cppflags="$cf_new_extra_cppflags "
+ cf_new_extra_cppflags="${cf_new_extra_cppflags}$cf_add_cflags"
+
+ continue
+ elif test "${cf_tst_cflags}" = "\"'" ; then
+
+ test -n "$cf_new_extra_cppflags" && cf_new_extra_cppflags="$cf_new_extra_cppflags "
+ cf_new_extra_cppflags="${cf_new_extra_cppflags}$cf_add_cflags"
+
+ continue
+ fi
+ ;;
+ esac
+ case "$CPPFLAGS" in
+ (*$cf_add_cflags)
+ ;;
+ (*)
+ case "$cf_add_cflags" in
+ (-D*)
+ cf_tst_cppflags=`echo "x$cf_add_cflags" | sed -e 's/^...//' -e 's/=.*//'`
+
+CPPFLAGS=`echo "$CPPFLAGS" | \
+ sed -e 's/-[UD]'"$cf_tst_cppflags"'\(=[^ ]*\)\?[ ]/ /g' \
+ -e 's/-[UD]'"$cf_tst_cppflags"'\(=[^ ]*\)\?$//g'`
+
+ ;;
+ esac
+
+ test -n "$cf_new_cppflags" && cf_new_cppflags="$cf_new_cppflags "
+ cf_new_cppflags="${cf_new_cppflags}$cf_add_cflags"
+
+ ;;
+ esac
+ ;;
+ (*)
+
+ test -n "$cf_new_cflags" && cf_new_cflags="$cf_new_cflags "
+ cf_new_cflags="${cf_new_cflags}$cf_add_cflags"
+
+ ;;
+ esac
+ ;;
+(yes)
+
+ test -n "$cf_new_extra_cppflags" && cf_new_extra_cppflags="$cf_new_extra_cppflags "
+ cf_new_extra_cppflags="${cf_new_extra_cppflags}$cf_add_cflags"
+
+ cf_tst_cflags=`echo "${cf_add_cflags}" |sed -e 's/^[^"]*"'\''//'`
+
+ test "x${cf_add_cflags}" != "x${cf_tst_cflags}" \
+ && test -z "${cf_tst_cflags}" \
+ && cf_fix_cppflags=no
+ ;;
+esac
+done
+
+if test -n "$cf_new_cflags" ; then