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changeset 3356:8f113648d4ec

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(jm_AC_TYPE_LONG_LONG): New macro.
author Jim Meyering <jim@meyering.net>
date Sat, 18 Aug 2001 15:55:38 +0000
parents 867e9fa9a6c3
children b1734ebed89b
files m4/longlong.m4
diffstat 1 files changed, 19 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/m4/longlong.m4	Sat Aug 18 15:54:36 2001 +0000
+++ b/m4/longlong.m4	Sat Aug 18 15:55:38 2001 +0000
@@ -1,7 +1,25 @@
-#serial 3
+#serial 2
 
 dnl From Paul Eggert.
 
+# Define HAVE_LONG_LONG if 'long long' works.
+
+AC_DEFUN([jm_AC_TYPE_LONG_LONG],
+[
+  AC_CACHE_CHECK([for long long], ac_cv_type_long_long,
+  [AC_TRY_LINK([long long ll = 1; int i = 63;],
+    [long long llmax = (long long) -1;
+     return ll << i | ll >> i | llmax / ll | llmax % ll;],
+    ac_cv_type_long_long=yes,
+    ac_cv_type_long_long=no)])
+  if test $ac_cv_type_long_long = yes; then
+    AC_DEFINE(HAVE_LONG_LONG, 1,
+      [Define if you have the long long type.])
+  fi
+])
+
+# Define HAVE_UNSIGNED_LONG_LONG if 'unsigned long long' works.
+
 AC_DEFUN([jm_AC_TYPE_UNSIGNED_LONG_LONG],
 [
   AC_CACHE_CHECK([for unsigned long long], ac_cv_type_unsigned_long_long,