Added an availability check for the -rdynamic linker option

- Fixes an issue preventing to compile on non-ELF systems (i.e. OS X)
  using recent gcc versions (such as 5.2) that are unable to filter out
  this option where it's not needed.
- Thanks to Smokexyz for reporting the issue.

Signed-off-by: Haru <haru@dotalux.com>

2 files changed, 61 insertions, 5 deletions

diff --git a/configure b/configure
index fbf36aa38..629451942 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in afa7ec2.
+# From configure.in d2e3acb.
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.69.
 #
@@ -4616,8 +4616,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 CFLAGS="$CFLAGS -pipe -ffast-math -fvisibility=hidden -Wall -Wextra -Wno-sign-compare"
 CPPFLAGS="$CPPFLAGS -I../common"
-LDFLAGS="$LDFLAGS -rdynamic"
-
+LDFLAGS="$LDFLAGS"
 
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether byte ordering is bigendian" >&5
 $as_echo_n "checking whether byte ordering is bigendian... " >&6; }
@@ -5008,6 +5007,38 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
 fi
 
 
+#
+# Check if the linker supports/accepts -rdynamic
+# Generally only needed by the ELF linker, in order to produce backtraces.
+# On non-ELF platforms, some compilers (i.e. gcc < 5 and clang on OSX) are able to ignore it, others will error out.
+#
+OLD_LDFLAGS="$LDFLAGS"
+LDFLAGS="$LDFLAGS -rdynamic"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -rdynamic" >&5
+$as_echo_n "checking whether $CC accepts -rdynamic... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+		int main(int argc, char **argv)
+		{
+			return 0;
+		}
+
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+else
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+		LDFLAGS="$OLD_LDFLAGS"
+
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
 #
 # LTO Support test
diff --git a/configure.in b/configure.in
index de709bede..5bb0dff65 100644
--- a/configure.in
+++ b/configure.in
@@ -487,8 +487,7 @@ AC_LANG([C])
 
 CFLAGS="$CFLAGS -pipe -ffast-math -fvisibility=hidden -Wall -Wextra -Wno-sign-compare"
 CPPFLAGS="$CPPFLAGS -I../common"
-LDFLAGS="$LDFLAGS -rdynamic"
-
+LDFLAGS="$LDFLAGS"
 
 AC_C_BIGENDIAN(
 	[AC_MSG_ERROR([[bigendian is not supported... stopping]])],
@@ -590,6 +589,32 @@ AC_RUN_IFELSE(
 	]
 )
 
+#
+# Check if the linker supports/accepts -rdynamic
+# Generally only needed by the ELF linker, in order to produce backtraces.
+# On non-ELF platforms, some compilers (i.e. gcc < 5 and clang on OSX) are able to ignore it, others will error out.
+#
+OLD_LDFLAGS="$LDFLAGS"
+LDFLAGS="$LDFLAGS -rdynamic"
+AC_MSG_CHECKING([whether $CC accepts -rdynamic])
+AC_LINK_IFELSE(
+	[AC_LANG_SOURCE([
+		int main(int argc, char **argv)
+		{
+			return 0;
+		}
+	])],
+	[
+		AC_MSG_RESULT([yes])
+	],
+	[
+		AC_MSG_RESULT([no])
+		LDFLAGS="$OLD_LDFLAGS"
+	],
+	[
+		AC_MSG_RESULT([guessing no])
+	]
+)
 
 #
 # LTO Support test