Added answers to test suite questions.

[oota-llvm.git] / autoconf / aclocal.m4

diff --git a/autoconf/aclocal.m4 b/autoconf/aclocal.m4
index 8f64b5b6710b7ef50aa1c7583e8336f600835623..da725af8a46c31c4f6d671582a1183e67463d9ac 100644 (file)
--- a/autoconf/aclocal.m4
+++ b/autoconf/aclocal.m4
@@ -6130,7 +6130,7 @@ ac_cv_func_mmap_file,
   AC_LANG_RESTORE
 ])
 if test "$ac_cv_func_mmap_file" = yes; then
-   AC_DEFINE(HAVE_MMAP_FILE)
+   AC_DEFINE([HAVE_MMAP_FILE],[],[Define if mmap() can map files into memory])
    AC_SUBST(MMAP_FILE,[yes])
 fi
 ])
@@ -6152,7 +6152,7 @@ ac_cv_header_mmap_anon,
   AC_LANG_RESTORE
 ])
 if test "$ac_cv_header_mmap_anon" = yes; then
-   AC_DEFINE(HAVE_MMAP_ANONYMOUS)
+   AC_DEFINE([HAVE_MMAP_ANONYMOUS],[],[Define if mmap() uses MAP_ANONYMOUS to map anonymous pages, or undefine if it uses MAP_ANON])
 fi
 ])
 
@@ -6166,4 +6166,33 @@ AC_DEFUN([AC_CONFIG_MAKEFILE],
 [AC_CONFIG_COMMANDS($1,${SHELL} ${srcdir}/autoconf/install-sh -c ${srcdir}/$1 $1,${srcdir}/autoconf/mkinstalldirs `dirname $1`)
 ])
 
+#
+# 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_LANG_SAVE
+       AC_LANG_C
+       AC_RUN_IFELSE(
+               AC_LANG_PROGRAM([#include <stdio.h>
+                                #include <stdlib.h>],
+                                [[[
+                                volatile double A, B;
+                                char Buffer[100];
+                                A = 1;
+                                A /= 10.0;
+                                sprintf(Buffer, "%a", A);
+                                B = atof(Buffer);
+                                if (A != B)
+                                                        return (1);
+                                if (A != 0x1.999999999999ap-4)
+                                                        return (1);
+                                return (0);]]]),
+               ac_c_printf_a=yes,ac_c_printf_a=no)
+       AC_LANG_RESTORE
+       if test "$ac_c_printf_a" = "yes"; then
+               AC_DEFINE([HAVE_PRINTF_A],[1],[Define to have the %a format string])
+       fi
+])