From 4ac2d17dcd70f32b83248109f595fca00e756b1f Mon Sep 17 00:00:00 2001
From: lecoanet
Date: Thu, 14 Jun 2007 09:37:49 +0000
Subject: Patch to configure for 64 bits on linux

---
 tclconfig/tcl.m4 | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'tclconfig/tcl.m4')

diff --git a/tclconfig/tcl.m4 b/tclconfig/tcl.m4
index 1038544..33f09d1 100644
--- a/tclconfig/tcl.m4
+++ b/tclconfig/tcl.m4
@@ -1456,6 +1456,18 @@ dnl AC_CHECK_TOOL(AR, ar)
 	    if test "`uname -m`" = "alpha" ; then
 		CFLAGS="$CFLAGS -mieee"
 	    fi
+            if test $do64bit = yes; then
+	        AC_CACHE_CHECK([if compiler accepts -m64 flag], tcl_cv_cc_m64, [
+		    hold_cflags=$CFLAGS
+		    CFLAGS="$CFLAGS -m64"
+		    AC_TRY_LINK(,, tcl_cv_cc_m64=yes, tcl_cv_cc_m64=no)
+		    CFLAGS=$hold_cflags])
+		if test $tcl_cv_cc_m64 = yes; then
+		    CFLAGS="$CFLAGS -m64"
+		    do64bit_ok=yes
+	        fi
+	    fi
+
 
 	    # The combo of gcc + glibc has a bug related
 	    # to inlining of functions like strtod(). The
-- 
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