I've been experimenting with the idea of building native crosses on my most
capable machine, for the many variants of darwin we now have, and then using
the older/slower hardware for test only.
This has uncovered a few issues with cross/native cross flags etc.
this patch adjusts the mh-darwin fragment to ensure
(i) that PIE is disabled for gcc exes on Darwin hosts since it is
incompatible with the current PCH implementation.
(ii) that -mdynamic-no-pic is used for m32 hosts.
… for crosses as well as bootstraps (and, also, for stage1 compilations when
bootstrapping on a darwin host).
OK for trunk?
Iain
config:
* mh-darwin (BOOT_CFLAGS): Only add -mdynamic-no-pic for m32 hosts.
(STAGE1_CFLAGS, STAGE1_LDFLAGS): New.
Fix over-length lines and amend comments.
diff --git a/config/mh-darwin b/config/mh-darwin
index 19bf265..a039f20 100644
--- a/config/mh-darwin
+++ b/config/mh-darwin
@@ -1,7 +1,18 @@
# The -mdynamic-no-pic ensures that the compiler executable is built without
# position-independent-code -- the usual default on Darwin. This fix speeds
# compiles by 3-5%.
-BOOT_CFLAGS += -mdynamic-no-pic
+BOOT_CFLAGS += \
+`case ${host} in i?86-*-darwin* | powerpc-*-darwin*) \
+ echo -mdynamic-no-pic ;; esac;`
-# Ensure we don't try and use -pie, as it is incompatible with pch.
-BOOT_LDFLAGS += `case ${host} in *-*-darwin[1][1-9]*) echo -Wl,-no_pie ;;
esac;`
+# ld on Darwin versions >= 10.7 defaults to PIE executables. Disable this for
+# gcc components, since it is incompatible with our pch implementation.
+BOOT_LDFLAGS += \
+`case ${host} in *-*-darwin[1][1-9]*) echo -Wl,-no_pie ;; esac;`
+
+# Similarly, for cross-compilation.
+STAGE1_CFLAGS += \
+`case ${host} in i?86-*-darwin* | powerpc-*-darwin*)\
+ echo -mdynamic-no-pic ;; esac;`
+STAGE1_LDFLAGS += \
+`case ${host} in *-*-darwin[1][1-9]*) echo -Wl,-no_pie ;; esac;`
