Cache the value of this test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18231 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/autoconf/m4/c_printf_a.m4 b/autoconf/m4/c_printf_a.m4
index 86f5269d4d72547340ac47b119c36dbffb5c0938..87e6654bc1bbbc95fd9a2d018344d71bc11d6540 100644 (file)
--- a/autoconf/m4/c_printf_a.m4
+++ b/autoconf/m4/c_printf_a.m4
@@ -2,11 +2,11 @@
 # Determine if the printf() functions have the %a format character.
 # This is modified from:
 # http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_slist.html
-AC_DEFUN([AC_C_PRINTF_A],[
-  AC_MSG_CHECKING([for printf %a format specifier])
-  AC_LANG_PUSH([C])
-  AC_RUN_IFELSE([
-    AC_LANG_PROGRAM([[
+AC_DEFUN([AC_C_PRINTF_A],
+[AC_CACHE_CHECK([if printf has the %a format character],[ac_cv_printf_a],
+[AC_LANG_PUSH([C])
+ AC_RUN_IFELSE([
+  AC_LANG_PROGRAM([[
 #include <stdio.h>
 #include <stdlib.h>
 ]],[[
@@ -24,9 +24,8 @@ return (0);]])],
   ac_c_printf_a=yes,
   ac_c_printf_a=no,
   ac_c_printf_a=no)
- AC_LANG_POP([C])
- AC_MSG_RESULT($ac_c_printf_a)
- if test "$ac_c_printf_a" = "yes"; then
+ AC_LANG_POP([C])])
+ if test "$ac_cv_printf_a" = "yes"; then
    AC_DEFINE([HAVE_PRINTF_A],[1],[Define to have the %a format string])
  fi
 ])

diff --git a/autoconf/m4/link_use_r.m4 b/autoconf/m4/link_use_r.m4
index 9bd648fabbe65566725a37551fcce6e1f03013fc..30c964e25971ac031466a11c36c1b38694bca982 100644 (file)
--- a/autoconf/m4/link_use_r.m4
+++ b/autoconf/m4/link_use_r.m4
@@ -4,17 +4,16 @@
 # This macro is specific to LLVM.
 #
 AC_DEFUN([AC_LINK_USE_R],
-[
-  AC_MSG_CHECKING([for compiler -Wl,-R<path> option])
-  AC_LANG_PUSH([C])
+[AC_CACHE_CHECK([for compiler -Wl,-R<path> option],[llvm_cv_link_use_r],
+[ AC_LANG_PUSH([C])
   oldcflags="$CFLAGS"
   CFLAGS="$CFLAGS -Wl,-R."
-  AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],[ac_cv_link_use_r=yes],[ac_cv_link_use_r=no])
+  AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],
+    [llvm_cv_link_use_r=yes],[llvm_cv_link_use_r=no])
   CFLAGS="$oldcflags"
   AC_LANG_POP([C])
-  AC_MSG_RESULT($ac_cv_link_use_r)
-  if test "$ac_cv_link_use_r" = yes
-  then
-    AC_DEFINE([HAVE_LINK_R],[1],[Define if you can use -Wl,-R. to pass -R. to the linker, in order to add the current directory to the dynamic linker search path.])
+])
+if test "$llvm_cv_link_use_r" = yes ; then
+  AC_DEFINE([HAVE_LINK_R],[1],[Define if you can use -Wl,-R. to pass -R. to the linker, in order to add the current directory to the dynamic linker search path.])
   fi
 ])