diff options
Diffstat (limited to 'Rules.mak')
| -rw-r--r-- | Rules.mak | 56 |
1 files changed, 32 insertions, 24 deletions
@@ -71,6 +71,16 @@ HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc. LC_ALL:= C +# initialize flags here +CFLAGS:= +CFLAGS_COMBINE:= +CFLAGS_PIC:= +LD_FLAGS:= +LIB_LDFLAGS:= +PROG_LDFLAGS:= +PROG_CFLAGS:= +OPTIMIZATIONS:= + # If you want to add some simple compiler switches (like -march=i686), # especially from the command line, use this instead of CFLAGS directly. # For optimization overrides, it's better still to set OPTIMIZATIONS. @@ -94,7 +104,7 @@ CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS))) WARNINGS=-Wall -Wstrict-prototypes -Wshadow CFLAGS+=-I$(top_builddir)/include -I$(top_srcdir)/include -ARFLAGS=cruP +ARFLAGS=cru @@ -149,8 +159,8 @@ __TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \ ) endif -$(call check_gcc,CFLAGS,-funsigned-char,) -$(call check_gcc,CFLAGS,-mmax-stack-frame=256,) +CFLAGS+=$(call check_gcc,CFLAGS,-funsigned-char,) +CFLAGS+=$(call check_gcc,CFLAGS,-mmax-stack-frame=256,) #-------------------------------------------------------- # Arch specific compiler optimization stuff should go here. @@ -158,51 +168,51 @@ $(call check_gcc,CFLAGS,-mmax-stack-frame=256,) # for OPTIMIZATIONS... # use '-Os' optimization if available, else use -O2 -$(call check_gcc,OPTIMIZATIONS,-Os,-O2) +OPTIMIZATIONS+=$(call check_gcc,OPTIMIZATIONS,-Os,-O2) # gcc 2.95 exits with 0 for "unrecognized option" -$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ +CFLAGS_COMBINE+=$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ $(if $(call cc_ge,3,0),\ $(call check_gcc,CFLAGS_COMBINE,--combine,))) -$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ +OPTIMIZATIONS+=$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ $(call check_gcc,OPTIMIZATIONS,-funit-at-a-time,)) # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25795 -#$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ +#PROG_CFLAGS+=$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ # $(call check_gcc,PROG_CFLAGS,-fwhole-program,)) -$(call check_ld,LIB_LDFLAGS,--enable-new-dtags,) -#$(call check_ld,LIB_LDFLAGS,--reduce-memory-overheads,) -#$(call check_ld,LIB_LDFLAGS,--as-needed,) -#$(call check_ld,LIB_LDFLAGS,--warn-shared-textrel,) +LIB_LDFLAGS+=$(call check_ld,LIB_LDFLAGS,--enable-new-dtags,) +#LIB_LDFLAGS+=$(call check_ld,LIB_LDFLAGS,--reduce-memory-overheads,) +#LIB_LDFLAGS+=$(call check_ld,LIB_LDFLAGS,--as-needed,) +#LIB_LDFLAGS+=$(call check_ld,LIB_LDFLAGS,--warn-shared-textrel,) -$(call check_ld,PROG_LDFLAGS,--gc-sections,) +PROG_LDFLAGS+=$(call check_ld,PROG_LDFLAGS,--gc-sections,) # Some nice architecture specific optimizations ifeq ($(__TARGET_ARCH),arm) OPTIMIZATIONS+=-fstrict-aliasing endif # arm -$(if $(call is_eq,$(__TARGET_ARCH),i386),\ +OPTIMIZATIONS+=$(if $(call is_eq,$(__TARGET_ARCH),i386),\ $(call check_gcc,OPTIMIZATIONS,-march=i386,)) # gcc-4.0 and older seem to benefit from these -$(if $(call cc_le,4,0),\ +OPTIMIZATIONS+=$(if $(call cc_le,4,0),\ $(call check_gcc,OPTIMIZATIONS,-mpreferred-stack-boundary=2,)\ $(call check_gcc,OPTIMIZATIONS,-falign-functions=1 -falign-jumps=1 -falign-loops=1,\ -malign-functions=0 -malign-jumps=0 -malign-loops=0)) # gcc-4.1 and beyond seem to benefit from these # turn off flags which hurt -Os -$(if $(call cc_ge,4,1),\ +OPTIMIZATIONS+=$(if $(call cc_ge,4,1),\ $(call check_gcc,OPTIMIZATIONS,-fno-tree-loop-optimize,)\ $(call check_gcc,OPTIMIZATIONS,-fno-tree-dominator-opts,)\ $(call check_gcc,OPTIMIZATIONS,-fno-strength-reduce,)\ \ $(call check_gcc,OPTIMIZATIONS,-fno-branch-count-reg,)) -$(call check_gcc,OPTIMIZATIONS,-fomit-frame-pointer,) +OPTIMIZATIONS+=$(call check_gcc,OPTIMIZATIONS,-fomit-frame-pointer,) # #-------------------------------------------------------- @@ -227,9 +237,7 @@ else endif endif -$(if $(call is_eq,$(CONFIG_DEBUG),y),\ - $(call check_ld,LDFLAGS,--warn-common,),\ - $(call check_ld,LDFLAGS,--warn-common,)$(call check_ld,LDFLAGS,--sort-common,)) +LDFLAGS+=$(if $(call is_eq,$(CONFIG_DEBUG),y),$(call check_ld,LDFLAGS,--warn-common,)$(call check_ld,LDFLAGS,--sort-common,)) ifeq ($(CONFIG_DEBUG),y) CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging @@ -237,14 +245,15 @@ else CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment endif -$(if $(call is_eq,$(CONFIG_STATIC),y),\ +PROG_CFLAGS+=$(if $(call is_eq,$(CONFIG_STATIC),y),\ $(call check_gcc,PROG_CFLAGS,-static,)) -$(call check_gcc,CFLAGS_SHARED,-shared,) +CFLAGS_SHARED+=$(call check_gcc,CFLAGS_SHARED,-shared,) LIB_CFLAGS+=$(CFLAGS_SHARED) -$(if $(call is_eq,$(CONFIG_BUILD_LIBBUSYBOX),y),\ +CFLAGS_PIC+=$(if $(call is_eq,$(CONFIG_BUILD_LIBBUSYBOX),y),\ $(call check_gcc,CFLAGS_PIC,-fPIC,)) +LIB_CFLAGS+=$(CFLAGS_PIC) ifeq ($(CONFIG_SELINUX),y) LIBRARIES += -lselinux @@ -379,12 +388,11 @@ ifdef rules-mak-rules .SUFFIXES: .c .S .o .os .om .osm .oS .so .a .s .i .E # generic rules -%.o: %.c ; $(compile.c) -%.os: %.c ; $(compile.c) $(CFLAGS_PIC) %.o: ; $(compile.c) %.os: ; $(compile.c) $(CFLAGS_PIC) %.om: ; $(compile.m) %.osm: ; $(compile.m) $(CFLAGS_PIC) +%.a: ; $(do_ar) endif # rules-mak-rules |