eglibc: add version 2.15

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32101 3c298f89-4303-0410-b956-a3cf2f4a3e73

toolchain/eglibc/patches/2.15/001-fix_autoconf_macro.patch

@@ -0,0 +1,48 @@
+--- a/libc/aclocal.m4
++++ b/libc/aclocal.m4
+@@ -88,6 +88,12 @@
+ fi
+ rm -fr contest*])
+ 
++dnl Test a compiler option or options with an empty input file.
++dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
++AC_DEFUN([LIBC_TRY_CC_OPTION],
++[AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
++ [$2], [$3])])
++
+ AC_DEFUN([LIBC_PROG_BINUTILS],
+ [# Was a --with-binutils option given?
+ if test -n "$path_binutils"; then
+--- a/libc/configure
++++ b/libc/configure
+@@ -7404,7 +7404,14 @@
+ else
+   libc_cv_cc_nofma=
+ for opt in -ffp-contract=off -mno-fused-madd; do
+-  LIBC_TRY_CC_OPTION($opt, libc_cv_cc_nofma=$opt; break)
++  if { ac_try='${CC-cc} $opt -xc /dev/null -S -o /dev/null'
++  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
++  (eval $ac_try) 2>&5
++  ac_status=$?
++  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
++  test $ac_status = 0; }; }; then :
++  libc_cv_cc_nofma=$opt; break
++fi
+ done
+ fi
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_nofma" >&5
+--- a/libc/configure.in
++++ b/libc/configure.in
+@@ -2238,10 +2238,9 @@
+ 		 libc_cv_cc_submachine, [dnl
+   libc_cv_cc_submachine=no
+   for opt in "-march=$submachine" "-mcpu=$submachine"; do
+-    if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
++    LIBC_TRY_CC_OPTION([$opt], [
+       libc_cv_cc_submachine="$opt"
+-      break
+-    fi
++      break], [])
+   done])
+   if test "x$libc_cv_cc_submachine" = xno; then
+     AC_MSG_ERROR([${CC-cc} does not support $submachine])