jit: on OS X, add -Wl,-undefined,dynamic_lookup to driver invocation

2015-08-13 David Malcolm <[email protected]> Backport from mainline r226882 2015-08-13 David Malcolm <[email protected]> * jit-playback.c (invoke_driver): On OS X, add "-Wl,-undefined,dynamic_lookup" to the driver arguments. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-5-branch@226883 138bc75d-0d04-0410-961f-82ee72b054a4
gcc-mirror · Aug 14, 2015 · 2f88614 · 2f88614
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diff --git a/gcc/jit/ChangeLog b/gcc/jit/ChangeLog
@@ -1,3 +1,11 @@
+2015-08-13  David Malcolm  <[email protected]>
+
+	Backport from mainline r226882
+	2015-08-13  David Malcolm  <[email protected]>
+
+	* jit-playback.c (invoke_driver): On OS X, add
+	"-Wl,-undefined,dynamic_lookup" to the driver arguments.
+
 2015-07-23  David Malcolm  <[email protected]>
 
 	Backport from mainline r226126

diff --git a/gcc/jit/jit-playback.c b/gcc/jit/jit-playback.c
@@ -2461,6 +2461,15 @@ invoke_driver (const char *ctxt_progname,
      time.  */
   ADD_ARG ("-fno-use-linker-plugin");
 
+#if defined (DARWIN_X86) || defined (DARWIN_PPC)
+  /* OS X's linker defaults to treating undefined symbols as errors.
+     If the context has any imported functions or globals they will be
+     undefined until the .so is dynamically-linked into the process.
+     Ensure that the driver passes in "-undefined dynamic_lookup" to the
+     linker.  */
+  ADD_ARG ("-Wl,-undefined,dynamic_lookup");
+#endif
+
   /* pex argv arrays are NULL-terminated.  */
   argvec.safe_push (NULL);