[PATCH] Add support for configure option --without-gmp.

[James Youngman]

2008-07-30  James Youngman  <address@hidden>

        * m4/gmp.m4: Add support for --without-gmp.
---
 m4/gmp.m4 |   19 +++++++++++++------
 1 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/m4/gmp.m4 b/m4/gmp.m4
index c0d1091..1efecd8 100644
--- a/m4/gmp.m4
+++ b/m4/gmp.m4
@@ -11,10 +11,17 @@ dnl Written by James Youngman.
 dnl Check for libgmp.  We avoid use of AC_CHECK_LIBS because we don't want to
 dnl add this to $LIBS for all targets.
 AC_DEFUN([cu_GMP],
-[
-     AC_CHECK_LIB(gmp, __gmpz_init,
-                  [
-                   AC_DEFINE(HAVE_GMP,1,[Define if you have GNU libgmp (or 
replacement)])
-                   AC_SUBST(LIB_GMP,[-lgmp])
-                  ],)
+[AC_ARG_WITH(gmp,
+            AS_HELP_STRING([--without-gmp],
+                           [do not use the GNU MP library for arbitrary 
precision calculation (the default is to use it if it is available)]),
+           [cu_use_gmp=$withval],
+           [cu_use_gmp=auto])
+
+ if test"$cu_use_gmp" = auto; then
+    AC_CHECK_LIB(gmp, __gmpz_init, [cu_use_gmp=yes])
+ fi
+ if test "$cu_use_gmp" = yes; then
+    AC_DEFINE(HAVE_GMP,1,[Define if you have GNU libgmp (or replacement) and 
want to use it])
+    AC_SUBST(LIB_GMP,[-lgmp])
+ fi
 ])
-- 
1.5.6.3