x86_64: add -fno-builtin to gcc command line for .hc files.

This seems to be required now that we're stealing more registers.

diff --git a/ghc/compiler/main/DynFlags.hs b/ghc/compiler/main/DynFlags.hs
index b1eb433..8f6ac1f 100644 (file)
--- a/ghc/compiler/main/DynFlags.hs
+++ b/ghc/compiler/main/DynFlags.hs
@@ -1266,11 +1266,15 @@ machdepCCOpts dflags
                        -- and get in the way of -split-objs.  Another option
                        -- would be to throw them away in the mangler, but this
                        -- is easier.
-                "-fno-unit-at-a-time"
+                "-fno-unit-at-a-time",
                        -- unit-at-a-time doesn't do us any good, and screws
                        -- up -split-objs by moving the split markers around.
                        -- It's only turned on with -O2, but put it here just
                        -- in case someone uses -optc-O2.
+                "-fno-builtin"
+                       -- calling builtins like strlen() using the FFI can
+                       -- cause gcc to run out of regs, so use the external
+                       -- version.
                ] )
 
 #elif mips_TARGET_ARCH