fix for ticket:268, vector not always a context sensitive keywork

[debian/gnuradio] / config / gr_set_md_cpu.m4

diff --git a/config/gr_set_md_cpu.m4 b/config/gr_set_md_cpu.m4
index b9c570eded395c28cbe3a36638cb6088df37776d..56fd83bacd84ef4acdf2de7060bb2b585ebb4e2b 100644 (file)
--- a/config/gr_set_md_cpu.m4
+++ b/config/gr_set_md_cpu.m4
@@ -19,20 +19,39 @@ dnl the Free Software Foundation, Inc., 51 Franklin Street,
 dnl Boston, MA 02110-1301, USA.
 dnl 
 
+AC_DEFUN([_TRY_ADD_ALTIVEC],
+[
+  LF_CHECK_CC_FLAG([-mabi=altivec -maltivec])
+  LF_CHECK_CXX_FLAG([-mabi=altivec -maltivec])
+])
+
 AC_DEFUN([GR_SET_MD_CPU],[
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_ARG_WITH(md-cpu,
-       [  --with-md-cpu=ARCH      set machine dependent speedups (auto)],
+       AC_HELP_STRING([--with-md-cpu=ARCH],[set machine dependent speedups (auto)]),
                [cf_with_md_cpu="$withval"],
                [cf_with_md_cpu="$host_cpu"])
 
-  AC_MSG_CHECKING([for machine dependent speedups])
   case "$cf_with_md_cpu" in
    x86 | i[[3-7]]86)   MD_CPU=x86      MD_SUBCPU=x86 ;;
    x86_64)             MD_CPU=x86      MD_SUBCPU=x86_64 ;;
    powerpc*)            MD_CPU=powerpc ;;
    *)                  MD_CPU=generic ;;
   esac
+
+  AC_ARG_ENABLE(altivec,
+    AC_HELP_STRING([--enable-altivec],[enable altivec on PowerPC (yes)]),
+    [ if test $MD_CPU = powerpc; then
+        case "$enableval" in
+          (no)  MD_CPU=generic ;;
+          (yes) _TRY_ADD_ALTIVEC ;;
+          (*) AC_MSG_ERROR([Invalid argument ($enableval) to --enable-altivec]) ;;
+        esac
+      fi],
+    [ if test $MD_CPU = powerpc; then _TRY_ADD_ALTIVEC fi])
+
+
+  AC_MSG_CHECKING([for machine dependent speedups])
   AC_MSG_RESULT($MD_CPU)
   AC_SUBST(MD_CPU)
   AC_SUBST(MD_SUBCPU)