From 91547abf54d5e0795afda2781259ab8923eb527b Mon Sep 17 00:00:00 2001
From: Andy Wingo <wingo@pobox.com>
Date: Sun, 7 Mar 2021 20:43:16 +0100
Subject: More informative error message if GMP not found

* configure.ac: Mention --enable-mini-gmp if GMP not found.
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index a3cdaff78..b33777104 100644
--- a/configure.ac
+++ b/configure.ac
@@ -657,7 +657,7 @@ if test "x$enable_mini_gmp" = xyes || test "x$enable_mini_gmp" = xy; then
 else
   AC_LIB_HAVE_LINKFLAGS([gmp],[],[#include <gmp.h>], [mpz_import (0,0,0,0,0,0,0);])
   if test "x$HAVE_LIBGMP" != "xyes"; then
-    AC_MSG_ERROR([GNU MP 4.1 or greater not found])
+    AC_MSG_ERROR([GNU MP 4.1 or greater not found; either install it, or pass '--enable-mini-gmp' to use included less-optimal arbitrary-precision integer support.])
   fi
   if test "x$LIBGMP_PREFIX" != "x"; then
     CPPFLAGS="-I$LIBGMP_PREFIX $CPPFLAGS"
-- 
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