From 2eba7096b9ea04eda551d65ef9eff315641cc9d8 Mon Sep 17 00:00:00 2001
From: vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4>
Date: Wed, 9 Jan 2019 14:12:12 +0000
Subject: Moved the compatibility test of the configure options even earlier,
 from acinclude.m4 to configure.ac, just after the code that defines them.
 Also added an associated AC_MSG_CHECKING message for better clarity.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@13396 280ebfd0-de03-0410-8827-d642c229c3f4
---
 configure.ac | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 412f85fb8..9eaaaa3ea 100644
--- a/configure.ac
+++ b/configure.ac
@@ -228,6 +228,30 @@ AC_ARG_ENABLE(tune-for-coverage,
 dnl Makefile.am files can use "if MINI_GMP" / ... / "endif".
 AM_CONDITIONAL([MINI_GMP], [test -n "$mini_gmp_path"])
 
+dnl First, detect incompatibilities between the above configure options.
+AC_MSG_CHECKING([whether configure options are compatible])
+if test "$enable_logging" = yes; then
+  if test "$enable_thread_safe" = yes; then
+    AC_MSG_RESULT([no])
+    AC_MSG_ERROR([enable either logging or thread-safe, not both])
+  fi
+dnl The following test is done only to output a specific error message,
+dnl as there would otherwise be an error due to enable_thread_safe=no.
+  if test "$enable_shared_cache" = yes; then
+    AC_MSG_RESULT([no])
+    AC_MSG_ERROR([shared cache does not work with logging support])
+  fi
+  enable_thread_safe=no
+fi
+if test "$enable_shared_cache" = yes; then
+  if test "$enable_thread_safe" = no; then
+    AC_MSG_RESULT([no])
+    AC_MSG_ERROR([shared cache needs thread-safe support])
+  fi
+  enable_thread_safe=yes
+fi
+AC_MSG_RESULT([yes])
+
 
 dnl
 dnl Setup CC and CFLAGS
-- 
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