- (dtucker) [configure.ac] Continue the hunt for LLONG_MIN and LLONG_MAX:

   in today's episode we attempt to coax it from limits.h where it may be
   hiding, failing that we take the DIY approach.  Tested by tim@

2 files changed, 71 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 2046df86c..efebb2820 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+20050607
+ - (dtucker) [configure.ac] Continue the hunt for LLONG_MIN and LLONG_MAX:
+   in today's episode we attempt to coax it from limits.h where it may be
+   hiding, failing that we take the DIY approach.  Tested by tim@
+
 20050603
  - (dtucker) [configure.ac] Only try gcc -std=gnu99 if LLONG_MAX isn't
    defined, and check that it helps before keeping it in CFLAGS.  Some old
@@ -2681,4 +2686,4 @@
    - (djm) Trim deprecated options from INSTALL. Mention UsePAM
    - (djm) Fix quote handling in sftp; Patch from admorten AT umich.edu
 
-$Id: ChangeLog,v 1.3812 2005/06/03 09:33:10 dtucker Exp $
+$Id: ChangeLog,v 1.3813 2005/06/07 07:53:40 dtucker Exp $
diff --git a/configure.ac b/configure.ac
index 00fc858ef..62a11fa1e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.274 2005/06/03 09:33:10 dtucker Exp $
+# $Id: configure.ac,v 1.275 2005/06/07 07:53:40 dtucker Exp $
 #
 # Copyright (c) 1999-2004 Damien Miller
 #
@@ -96,6 +96,70 @@ if test "$GCC" = "yes" || test "$GCC" = "egcs"; then
         fi
 fi
 
+if test -z "$have_llong_max"; then
+        AC_MSG_CHECKING([for max value of long long])
+        AC_RUN_IFELSE(
+                [AC_LANG_SOURCE([[
+#include <stdio.h>
+/* Why is this so damn hard? */
+#ifdef __GNUC__
+# undef __GNUC__
+#endif
+#define __USE_ISOC99
+#include <limits.h>
+#define DATA "conftest.llminmax"
+int main(void) {
+        FILE *f;
+        long long i, llmin, llmax = 0;
+
+        if((f = fopen(DATA,"w")) == NULL)
+                exit(1);
+
+#if defined(LLONG_MIN) && defined(LLONG_MAX)
+        fprintf(stderr, "Using system header for LLONG_MIN and LLONG_MAX\n");
+        llmin = LLONG_MIN;
+        llmax = LLONG_MAX;
+#else
+        fprintf(stderr, "Calculating  LLONG_MIN and LLONG_MAX\n");
+        /* This will work on one's complement and two's complement */
+        for (i = 1; i > llmax; i <<= 1, i++)
+                llmax = i;
+        llmin = llmax + 1LL;    /* wrap */
+#endif
+
+        /* Sanity check */
+        if (llmin + 1 < llmin || llmin - 1 < llmin || llmax + 1 > llmax
+            || llmax - 1 > llmax) {
+                fprintf(f, "unknown unknown\n");
+                exit(2);
+        }
+
+        if (fprintf(f ,"%lld %lld", llmin, llmax) < 0)
+                exit(3);
+
+        exit(0);
+}
+                ]])],
+                [
+                        llong_min=`$AWK '{print $1}' conftest.llminmax`
+                        llong_max=`$AWK '{print $2}' conftest.llminmax`
+                        AC_MSG_RESULT($llong_max)
+                        AC_DEFINE_UNQUOTED(LLONG_MAX, [${llong_max}LL],
+                            [max value of long long calculated by configure])
+                        AC_MSG_CHECKING([for min value of long long])
+                        AC_MSG_RESULT($llong_min)
+                        AC_DEFINE_UNQUOTED(LLONG_MIN, [${llong_min}LL],
+                            [min value of long long calculated by configure])
+                ],
+                [
+                        AC_MSG_RESULT(not found)
+                ],
+                [
+                        AC_MSG_WARN([cross compiling: not checking])
+                ]
+        )
+fi
+
 AC_ARG_WITH(rpath,
         [  --without-rpath         Disable auto-added -R linker paths],
         [