gcc/config/mh-darwin

# 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%.  Don't add it if the compiler doesn't also support
# -mno-dynamic-no-pic to undo it.
DARWIN_MDYNAMIC_NO_PIC := \
`case ${host} in i?86-*-darwin* | powerpc-*-darwin*) \
   $(CC) -S -xc /dev/null -o /dev/null -mno-dynamic-no-pic 2>/dev/null \
   && echo -mdynamic-no-pic ;; esac`
DARWIN_GCC_MDYNAMIC_NO_PIC := \
`case ${host} in i?86-*-darwin* | powerpc-*-darwin*) \
   $(CC) -S -xc /dev/null -o /dev/null -mno-dynamic-no-pic 2>/dev/null \
   || echo -mdynamic-no-pic ;; esac`

# ld on Darwin versions >= 10.7 defaults to PIE executables. Disable this for
# gcc components, since it is incompatible with our pch implementation.
DARWIN_NO_PIE := `case ${host} in *-*-darwin[1][1-9]*) echo -Wl,-no_pie ;; esac;`

BOOT_CFLAGS += $(DARWIN_MDYNAMIC_NO_PIC)
BOOT_LDFLAGS += $(DARWIN_NO_PIE)

# Similarly, for cross-compilation.
STAGE1_CFLAGS += $(DARWIN_MDYNAMIC_NO_PIC)
STAGE1_LDFLAGS += $(DARWIN_NO_PIE)

# Without -mno-dynamic-no-pic support, add -mdynamic-no-pic just to later
# stages when we know it is built with gcc.
STAGE2_CFLAGS += $(DARWIN_GCC_MDYNAMIC_NO_PIC)
STAGE3_CFLAGS += $(DARWIN_GCC_MDYNAMIC_NO_PIC)
STAGE4_CFLAGS += $(DARWIN_GCC_MDYNAMIC_NO_PIC)