Add __PIC__ define for -fPIC compiled C code

diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs
index ce58c90..8880550 100644 (file)
--- a/compiler/main/DynFlags.hs
+++ b/compiler/main/DynFlags.hs
@@ -470,7 +470,9 @@ defaultDynFlags =
         hpcDir                 = ".hpc",
 
        opt_L                   = [],
-       opt_P                   = [],
+       opt_P                   = (if opt_PIC
+                                  then ["-D__PIC__"]
+                                  else []),
        opt_F                   = [],
        opt_c                   = [],
        opt_a                   = [],
@@ -1628,15 +1630,18 @@ picCCOpts dflags
       --     in dynamic libraries.
 
     | opt_PIC
-        = ["-fno-common"]
+        = ["-fno-common", "-D__PIC__"]
     | otherwise
         = ["-mdynamic-no-pic"]
 #elif mingw32_TARGET_OS
       -- no -fPIC for Windows
+    | opt_PIC
+        = ["-D__PIC__"]
+    | otherwise
         = []
 #else
     | opt_PIC
-        = ["-fPIC"]
+        = ["-fPIC", "-D__PIC__"]
     | otherwise
         = []
 #endif