From 743f46105e1fc10acf08bd5c79cfbf3ca571282a Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Tue, 7 Mar 2017 00:56:53 +0300
Subject: Enable -rdynamic flag only if it supported by linker.

---
 configure.ac    | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/Makefile.am |  4 ++++
 2 files changed, 58 insertions(+)

diff --git a/configure.ac b/configure.ac
index 4df89a250..406fc3688 100755
--- a/configure.ac
+++ b/configure.ac
@@ -580,6 +580,60 @@ if test "x$naclbuild_enabled" == "xtrue"; then
     AC_CHECK_SDL()
 fi
 
+AC_DEFUN([AC_CHECK_CXX_FLAG],
+    [
+        AC_MSG_CHECKING([whether $CC supports $1])
+        OLD_CXXFLAGS="$CXXFLAGS"
+        CXXFLAGS="$CXXFLAGS -Werror $1"
+        test_flag=no
+        AC_COMPILE_IFELSE(
+            [AC_LANG_SOURCE([int foo;])],
+            [
+                AC_MSG_RESULT([yes])
+                test_flag=yes
+            ],
+            [
+                AC_MSG_RESULT([no])
+                test_flag=no
+            ]
+            CXXFLAGS="$OLD_CXXFLAGS"
+        )
+        AM_CONDITIONAL($2, test x$test_flag = xtrue)
+    ]
+)
+
+AC_DEFUN([AC_CHECK_LD_FLAG],
+    [
+        AC_MSG_CHECKING([whether $LD supports $1])
+        OLD_CXXFLAGS="$CXXFLAGS"
+        OLD_LDFLAGS="$LDFLAGS"
+        CXXFLAGS=""
+        LDFLAGS="$LDFLAGS $1"
+        test_flag=no
+        AC_LINK_IFELSE(
+            [AC_LANG_SOURCE([
+                int main(int argc, char **argv)
+                {
+                    return 0;
+                }
+            ])],
+            [
+                AC_MSG_RESULT([yes])
+                test_flag=yes
+            ],
+            [
+                AC_MSG_RESULT([no])
+                test_flag=no
+            ]
+            CXXFLAGS="$OLD_CXXFLAGS"
+            LDFLAGS="$OLD_LDFLAGS"
+        )
+        AM_CONDITIONAL($2, test x$test_flag = xyes)
+    ]
+)
+
+AC_CHECK_LD_FLAG(-rdynamic, HAVE_RDYNAMIC)
+
 AC_CONFIG_FILES([
 manaplus.spec
 Makefile
diff --git a/src/Makefile.am b/src/Makefile.am
index 3a456a35e..89f09413e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -46,9 +46,11 @@ endif
 if ENABLE_ASSERTS
 manaplus_CXXFLAGS += -DENABLE_ASSERTS
 dyecmd_CXXFLAGS += -DENABLE_ASSERTS
+if HAVE_RDYNAMIC
 manaplus_LDFLAGS = -rdynamic
 dyecmd_LDFLAGS = -rdynamic
 endif
+endif
 
 if ENABLE_PUGIXML
 manaplus_CXXFLAGS += -DENABLE_PUGIXML
@@ -1947,8 +1949,10 @@ manaplustests_CXXFLAGS += -Werror
 endif
 if ENABLE_ASSERTS
 manaplustests_CXXFLAGS += -DENABLE_ASSERTS
+if HAVE_RDYNAMIC
 manaplustests_LDFLAGS = -rdynamic
 endif
+endif
 if ENABLE_GLIBCDEBUG
 manaplustests_CXXFLAGS += -D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC
 endif
-- 
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