Force -fPIC when linking against dynamic libraries on Mac OS/X.

Otherwise you get
/tmp/ghc7602_0/ghc7602_0.s:207:0:
   non-relocatable subtraction expression, "___stginit_Lib_dyn" minus "L1x2;4"
/tmp/ghc7602_0/ghc7602_0.s:207:0:
   symbol: "___stginit_Lib_dyn" can't be undefined in a subtraction expression

diff --git a/compiler/main/StaticFlags.hs b/compiler/main/StaticFlags.hs
index 9553081..d57ca18 100644 (file)
--- a/compiler/main/StaticFlags.hs
+++ b/compiler/main/StaticFlags.hs
@@ -271,6 +271,8 @@ opt_UF_DearOp            = ( 4 :: Int)
 opt_PIC :: Bool
 #if darwin_TARGET_OS && x86_64_TARGET_ARCH
 opt_PIC                         = True
 opt_PIC :: Bool
 #if darwin_TARGET_OS && x86_64_TARGET_ARCH
 opt_PIC                         = True

+#elif darwin_TARGET_OS
+opt_PIC                         = lookUp (fsLit "-fPIC") || not opt_Static

 #else
 opt_PIC                         = lookUp (fsLit "-fPIC")
 #endif
 #else
 opt_PIC                         = lookUp (fsLit "-fPIC")
 #endif