diff options
| -rw-r--r-- | Rules.mak | 74 |
1 files changed, 46 insertions, 28 deletions
@@ -1,6 +1,5 @@ # Rules.make for uClibc # -# Copyright (C) 2000 by Lineo, inc. # Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> # # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. @@ -8,16 +7,16 @@ #----------------------------------------------------------- # This file contains rules which are shared between multiple -# Makefiles. All normal configuration options live in the -# file named ".config". Don't mess with this file unless +# Makefiles. All normal configuration options live in the +# file named ".config". Don't mess with this file unless # you know what you are doing. #----------------------------------------------------------- -# If you are running a cross compiler, you will want to set -# 'CROSS' to something more interesting ... Target -# architecture is determined by asking the CC compiler what -# arch it compiles things for, so unless your compiler is +# If you are running a cross compiler, you will want to set +# 'CROSS' to something more interesting ... Target +# architecture is determined by asking the CC compiler what +# arch it compiles things for, so unless your compiler is # broken, you should not need to specify TARGET_ARCH. # # Most people will set this stuff on the command line, i.e. @@ -67,7 +66,7 @@ export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE # Now config hard core MAJOR_VERSION := 0 MINOR_VERSION := 9 -SUBLEVEL := 28 +SUBLEVEL := 29 VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL) # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc. LC_ALL := C @@ -121,6 +120,24 @@ check_ld=$(shell \ ARFLAGS:=cr OPTIMIZATION:= +# Use '-Os' optimization if available, else use -O2, allow Config to override +OPTIMIZATION+=$(call check_gcc,-Os,-O2) +# Use the gcc 3.4 -funit-at-a-time optimization when available +OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,) + +GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1) +#GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2) + +ifeq ($(GCC_MAJOR_VER),4) +# shrinks code, results are from 4.0.2 +# 0.36% +OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,) +# 0.34% +OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,) +# 0.1% +OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,) +endif + PICFLAG:=-fPIC PIEFLAG_NAME:=-fPIE @@ -226,11 +243,19 @@ endif ifeq ($(TARGET_ARCH),cris) CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux + CPU_LDFLAGS-$(CONFIG_CRISV32)+=-mcrislinux CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux PICFLAG:=-fpic PIEFLAG_NAME:=-fpie endif +ifeq ($(TARGET_ARCH),m68k) + # -fPIC is only supported for 68020 and above. It is not supported + # for 68000, 68010, or Coldfire. + PICFLAG:=-fpic + PIEFLAG_NAME:=-fpie +endif + ifeq ($(TARGET_ARCH),powerpc) # PowerPC can hold 8192 entries in its GOT with -fpic which is more than # enough. Therefore use -fpic which will reduce code size and generates @@ -240,9 +265,7 @@ ifeq ($(TARGET_ARCH),powerpc) endif ifeq ($(TARGET_ARCH),bfin) - # This should also work, but why bother ? ;) - #PICFLAG:=-fPIC -mid-shared-library - PICFLAG:=-fpic + PICFLAG:=-mfdpic endif ifeq ($(TARGET_ARCH),frv) @@ -265,14 +288,14 @@ else export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG)) endif endif -# We need to keep track of both the CC PIE flag (above) as -# well as the LD PIE flag (below) because we can't rely on +# We need to keep track of both the CC PIE flag (above) as +# well as the LD PIE flag (below) because we can't rely on # gcc passing -pie if we used -fPIE ifndef LDPIEFLAG ifneq ($(UCLIBC_BUILD_PIE),y) export LDPIEFLAG:= else -export LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie") +export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie") endif endif @@ -285,13 +308,8 @@ export ASNEEDED:=$(shell (LD_TMP=$(mktemp LD_XXXXXX) ; echo "GROUP ( AS_NEEDED ( endif endif -# Use '-Os' optimization if available, else use -O2, allow Config to override -OPTIMIZATION+=$(call check_gcc,-Os,-O2) -# Use the gcc 3.4 -funit-at-a-time optimization when available -OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,) - # Add a bunch of extra pedantic annoyingly strict checks -XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing +XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing ifeq ($(EXTRA_WARNINGS),y) XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations @@ -344,6 +362,8 @@ endif #CFLAGS += $(call check_gcc,-std=c99,) LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc +# binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok +#LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections) ifeq ($(UCLIBC_BUILD_RELRO),y) LDFLAGS_NOSTRIP+=-z relro @@ -360,10 +380,10 @@ CFLAGS += -O0 -g3 else CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS) endif -ifeq ($(NOSTRIP),y) -STRIPTOOL := true -Stripping_disabled -else +ifeq ($(DOSTRIP),y) LDFLAGS += -s +else +STRIPTOOL := true -Stripping_disabled endif ifeq ($(DOMULTI),y) @@ -372,8 +392,7 @@ ifeq ($(DOMULTI),y) # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources # gcc-4.0.x supports it, supports the --combine flag, but does not need it # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless -GCC_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1) -ifeq ($(GCC_VER),3) +ifeq ($(GCC_MAJOR_VER),3) DOMULTI:=n else CFLAGS+=$(call check_gcc,--combine,) @@ -404,7 +423,6 @@ PTINC:= -I$(PTDIR) \ -I$(PTDIR)/sysdeps/generic \ -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \ -I$(top_srcdir)ldso/include - # # Test for TLS if NPTL support was selected. # @@ -433,8 +451,8 @@ PTINC := \ endif CFLAGS+=$(PTINC) else - PTNAME := - PTINC := + PTNAME := + PTINC := endif # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include' |