From a9327484746820a5a2b8c1acf4a78470b004f0a0 Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@gnome.org>
Date: Thu, 11 Jul 2013 15:49:14 +0000
Subject: build: Add configure option to enable -Bsymbolic

We should always compile with -Bsymbolic enabled to avoid intra-library
PLT jumps.

https://bugzilla.gnome.org/show_bug.cgi?id=703734
---
diff --git a/configure.ac b/configure.ac
index 7c640fa..90654c6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,6 +93,30 @@ AC_MSG_RESULT([$platform_win32])
 AM_CONDITIONAL(OS_LINUX, [test "$platform_linux" = "yes"])
 AM_CONDITIONAL(OS_WIN32, [test "$platform_win32" = "yes"])
 
+# Check for -Bsymbolic-functions to avoid intra-library PLT jumps
+AC_ARG_ENABLE([Bsymbolic],
+              [AS_HELP_STRING([--disable-Bsymbolic],
+                              [Avoid linking with -Bsymbolic])],
+              [],
+              [
+                saved_LDFLAGS="${LDFLAGS}"
+                AC_MSG_CHECKING([for -Bsymbolic-functions linker flag])
+                LDFLAGS=-Wl,-Bsymbolic-functions
+                AC_TRY_LINK([], [int main (void) { return 0; }],
+                            [
+                              AC_MSG_RESULT([yes])
+                              enable_Bsymbolic=yes
+                            ],
+                            [
+                              AC_MSG_RESULT([no])
+                              enable_Bsymbolic=no
+                            ])
+                LDFLAGS="${saved_LDFLAGS}"
+              ])
+
+AS_IF([test "x$enable_Bsymbolic" = "xyes"], [JSON_LINK_FLAGS=-Wl[,]-Bsymbolic-functions])
+JSON_LT_LDFLAGS="$JSON_LT_LDFLAGS $JSON_LINK_FLAGS"
+
 AC_SUBST(JSON_LT_LDFLAGS)
 
 dnl === Dependencies ==========================================================
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