X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=configure.ac;h=99229d97037a9ece6d6003c7833a49539590ea14;hb=f8eb6a9e8986c6428de629b5538e431e1c04caf1;hp=28155a0e593841be057cba149faece8996fab2a5;hpb=db67d458959d211835f78d8f2aebb5ae84eb42e7;p=binutils-gdb.git

diff --git a/configure.ac b/configure.ac
index 28155a0e593..99229d97037 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,7 +31,6 @@ m4_include([lt~obsolete.m4])
 m4_include([config/isl.m4])
 
 AC_INIT(move-if-change)
-AC_PREREQ(2.64)
 AC_DISABLE_OPTION_CHECKING
 
 progname=$0
@@ -1286,11 +1285,11 @@ if test "$GCC" = yes; then
   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
   AC_LANG_PUSH(C++)
-  AC_LINK_IFELSE([
+  AC_LINK_IFELSE([AC_LANG_SOURCE([
 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
 #error -static-libstdc++ not implemented
 #endif
-int main() {}],
+int main() {}])],
     [AC_MSG_RESULT([yes]); have_static_libs=yes],
     [AC_MSG_RESULT([no])])
   AC_LANG_POP(C++)
@@ -2719,7 +2718,9 @@ INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
 # extrasub-{build,host,target} not because there is any reason to split
 # the substitutions up that way, but only to remain below the limit of
 # 99 commands in a script, for HP-UX sed.
-# Do not nest @if/@endif pairs, because configure will not warn you at all.
+
+# Do not nest @if/@endif or @unless/@endunless pairs, because
+# configure will not warn you at all.
 
 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
   yes:yes:*\ gold\ *:*,c++,*) ;;
@@ -2738,8 +2739,10 @@ for module in ${build_configdirs} ; do
   extrasub_build="$extrasub_build
 /^@if build-$module\$/d
 /^@endif build-$module\$/d
+/^@unless build-$module\$/,/^@endunless build-$module\$/d
 /^@if build-$module-$bootstrap_suffix\$/d
-/^@endif build-$module-$bootstrap_suffix\$/d"
+/^@endif build-$module-$bootstrap_suffix\$/d
+/^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
 done
 extrasub_host=
 for module in ${configdirs} ; do
@@ -2758,8 +2761,10 @@ for module in ${configdirs} ; do
   extrasub_host="$extrasub_host
 /^@if $module\$/d
 /^@endif $module\$/d
+/^@unless $module\$/,/^@endunless $module\$/d
 /^@if $module-$host_bootstrap_suffix\$/d
-/^@endif $module-$host_bootstrap_suffix\$/d"
+/^@endif $module-$host_bootstrap_suffix\$/d
+/^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
 done
 extrasub_target=
 for module in ${target_configdirs} ; do
@@ -2778,13 +2783,17 @@ for module in ${target_configdirs} ; do
   extrasub_target="$extrasub_target
 /^@if target-$module\$/d
 /^@endif target-$module\$/d
+/^@unless target-$module\$/,/^@endunless target-$module\$/d
 /^@if target-$module-$target_bootstrap_suffix\$/d
-/^@endif target-$module-$target_bootstrap_suffix\$/d"
+/^@endif target-$module-$target_bootstrap_suffix\$/d
+/^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
 done
 
 # Do the final fixup along with target modules.
 extrasub_target="$extrasub_target
-/^@if /,/^@endif /d"
+/^@if /,/^@endif /d
+/^@unless /d
+/^@endunless /d"
 
 # Create the serialization dependencies.  This uses a temporary file.