glibc/sysdeps/powerpc/Makefile
Roland McGrath c8f3e6bcf0 Fix ABI compatibility with libc compiled with old tools on powerpc.
Changes contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>
	and Jack Howarth <howarth@bromo.med.uc.edu>.
	* sysdeps/powerpc/Makefile [$(have-protected) = yes]
	(CPPFLAGS-divdi3.c, CPPFLAGS-libgcc-compat.S): New variables,
	pass -DHAVE_DOT_HIDDEN for these files.
	* sysdeps/powerpc/Versions (libc: GLIBC_2.0): Added __floatdidf,
	__floatdisf.
	* sysdeps/powerpc/divdi3.c: New file.
	* sysdeps/powerpc/libgcc-compat.S: New file, replacement for ...
	* sysdeps/powerpc/libgcc-compat.c: ... this, file removed.
2002-08-20 21:27:26 +00:00

60 lines
1.6 KiB
Makefile

# We always want to use the new mnemonic syntax even if we are on a RS6000
# machine.
+cflags += -mnew-mnemonics -Wa,-mppc -mpowerpc
asm-CPPFLAGS += -Wa,-mppc
ifeq ($(with-fp),no)
+cflags += -msoft-float
sysdep-LDFLAGS += -msoft-float
endif
ifeq ($(subdir),gmon)
sysdep_routines += ppc-mcount
endif
ifeq ($(subdir),misc)
sysdep_routines += gprsave0 gprrest0 gprsave1 gprrest1
endif
# On PPC, -fpic works until the GOT contains 2^15 bytes, and possibly
# more depending on how clever the linker is. Each GOT entry takes 4 bytes,
# so that's at least 8192 entries. Since libc only uses about 2000 entries,
# we want to use -fpic, because this generates fewer relocs.
ifeq (yes,$(build-shared))
pic-ccflag = -fpic
endif
ifeq ($(subdir),csu)
ifneq ($(elf),no)
# The initfini generation code doesn't work in the presence of -fPIC, so
# we use -fpic instead which is much better.
CFLAGS-initfini.s = -g0 -fpic -O1
# There is no benefit to using sdata for these objects, and the user
# of the library should be able to control what goes into sdata.
CFLAGS-init.o = -G0
CFLAGS-gmon-start.o = -G0
endif
ifeq (yes,$(build-shared))
# Compatibility
ifeq (yes,$(have-protected))
CPPFLAGS-divdi3.c = -DHAVE_DOT_HIDDEN
CPPFLAGS-libgcc-compat.S = -DHAVE_DOT_HIDDEN
endif
sysdep_routines += divdi3 libgcc-compat
shared-only-routines += divdi3 libgcc-compat
endif
endif
ifeq ($(subdir),string)
CFLAGS-memcmp.c += -Wno-uninitialized
endif
ifeq ($(subdir),elf)
# extra shared linker files to link into dl-allobjs.so and libc
sysdep-dl-routines += dl-machine
sysdep_routines += dl-machine
# extra shared linker files to link only into dl-allobjs.so
sysdep-rtld-routines += dl-machine dl-start
endif