From 8db162e04809aed2ccde7eb277caf60b732bcb0d Mon Sep 17 00:00:00 2001
From: David Adam <zanchey@ucc.gu.uwa.edu.au>
Date: Sat, 20 Jun 2015 21:33:36 +0800
Subject: configure: use feature detection for -rdynamic

Fixes the Cygwin build, works on OS X.

Work on #170.
---
 configure.ac | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 49ff391e..b8119fec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -210,9 +210,18 @@ CXXFLAGS="$CXXFLAGS -Wall -Wno-sign-compare"
 # This is needed in order to get the really cool backtraces on Linux
 #
 
-if test `uname` != "Darwin"; then
-   LDFLAGS_FISH="$LDFLAGS_FISH -rdynamic"
-fi
+AC_MSG_CHECKING([for -rdynamic linker flag])
+prev_LDFLAGS="$LDFLAGS"
+LDFLAGS="$LDFLAGS -rdynamic"
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[]])],
+               [
+                AC_MSG_RESULT([yes])
+                LDFLAGS_FISH="$LDFLAGS_FISH -rdynamic"
+               ], [
+                AC_MSG_RESULT([no])
+                LDFLAGS_FISH="$LDFLAGS_FISH"
+               ])
+LDFLAGS="$prev_LDFLAGS"
 
 #
 # On Cygwin, we need to add some flags for ncurses.
-- 
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