From 062aa8af7b8545386514ecc9359c485f34e7c0c7 Mon Sep 17 00:00:00 2001 From: Simon Marlow Date: Mon, 5 Jul 2010 10:30:14 +0000 Subject: [PATCH] Disable dynamic linking optimisations on OS X To improve performance of the RTS when dynamically linked on x86, I previously disabled -fPIC for certain critical modules (the GC, and a few others). However, build reports suggest that the dynamic linker on OS X doesn't like this, so I'm disabling this optimsation on that platform. --- rts/ghc.mk | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/rts/ghc.mk b/rts/ghc.mk index 397ab8d..7815e77 100644 --- a/rts/ghc.mk +++ b/rts/ghc.mk @@ -317,8 +317,18 @@ rts/RtsUtils_CC_OPTS += -DGhcEnableTablesNextToCode=$(DQ)$(GhcEnableTablesNextTo # must be compiled with -fPIC (since the 32-bit relocations generated # by the default small memory can't be resolved at runtime). So we # only do this on i386. - +# +# This apparently doesn't work on OS X (Darwin) where we get errors of +# the form +# +# ld: absolute addressing (perhaps -mdynamic-no-pic) used in _stg_ap_0_fast from rts/dist/build/Apply.dyn_o not allowed in slidable image +# +# and lots of these warnings: +# +# ld: warning codegen in _stg_ap_pppv_fast (offset 0x0000005E) prevents image from loading in dyld shared cache +# ifeq "$(TargetArch_CPP)" "i386" +ifneq "$(TargetOS_CPP)" "darwin" rts/sm/Evac_HC_OPTS += -fno-PIC rts/sm/Evac_thr_HC_OPTS += -fno-PIC rts/sm/Scav_HC_OPTS += -fno-PIC @@ -334,6 +344,7 @@ rts/PrimOps_HC_OPTS += -fno-PIC -static rts/Apply_HC_OPTS += -fno-PIC -static rts/dist/build/AutoApply_HC_OPTS += -fno-PIC -static endif +endif # ffi.h triggers prototype warnings, so disable them here: rts/Interpreter_CC_OPTS += -Wno-strict-prototypes -- 1.7.10.4