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| author | Bernhard Reutner-Fischer | 2006-01-27 15:45:56 +0000 |
|---|---|---|
| committer | Bernhard Reutner-Fischer | 2006-01-27 15:45:56 +0000 |
| commit | 08a1b5095d710c5d905056a9daa14a1acad5590b (patch) | |
| tree | 2b3632bc1361c718d8f80b7c95240730b7f52d71 | |
| parent | 79af7d5debe2f40ca1128975167243d4bb00fb51 (diff) | |
| download | busybox-08a1b5095d710c5d905056a9daa14a1acad5590b.zip busybox-08a1b5095d710c5d905056a9daa14a1acad5590b.tar.gz | |
- add a macro to check for ld and as flags
Very unreliable as e.g the ld check will see the flags supported by each emulation, not just the active one.
good enough for now..
Fix would be to crate one or more dummy .c files and accually try if a flag
works.
| -rw-r--r-- | Makefile | 3 | ||||
| -rw-r--r-- | Rules.mak | 32 |
2 files changed, 27 insertions, 8 deletions
@@ -277,8 +277,7 @@ endif $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) -shared \ $(CFLAGS_PIC) \ -Wl,-soname=$(LD_LIBBUSYBOX).$(MAJOR_VERSION) \ - -Wl,--enable-new-dtags -Wl,--reduce-memory-overheads \ - -Wl,-z,combreloc -Wl,-shared -Wl,--as-needed -Wl,--warn-shared-textrel \ + -Wl,-z,combreloc $(LIB_LDFLAGS) \ -o $(@) \ -Wl,--start-group -Wl,--whole-archive \ $(LIBRARY_DEFINE) $(^) \ @@ -115,6 +115,20 @@ check_gcc=$(shell \ then echo "$(1)"; else echo "$(2)"; fi \ fi) +# A not very robust macro to check for available ld flags +check_ld=$(shell \ + echo "checking='$(1)'" >> foo.txt ; \ + if [ "x$(1)" != "x" ]; then \ + $(LD) --help | grep -q \\$(1) && echo "-Wl,$(1)$(2)" ; \ + fi) + +# A not very robust macro to check for available as flags +check_as=$(shell \ + if [ "x$(1)" != "x" ]; then \ + $(AS) --help | grep -q "\\$(1)" && echo "-Wa,$(1)$(2)" ; \ + fi) + + # Setup some shortcuts so that silent mode is silent like it should be ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS)) export MAKE_IS_SILENT=n @@ -145,10 +159,15 @@ OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,) PROG_CFLAGS+=$(call check_gcc,-fwhole-program,) endif # CONFIG_BUILD_AT_ONCE +LIB_LDFLAGS:=$(call check_ld,--enable-new-dtags,) +#LIB_LDFLAGS+=$(call check_ld,--reduce-memory-overheads,) +#LIB_LDFLAGS+=$(call check_ld,--as-needed,) +#LIB_LDFLAGS+=$(call check_ld,--warn-shared-textrel,) + + # Some nice architecture specific optimizations ifeq ($(strip $(TARGET_ARCH)),arm) OPTIMIZATION+=-fstrict-aliasing - OPTIMIZATION+=$(call check_gcc,-msingle-pic-base,) endif ifeq ($(strip $(TARGET_ARCH)),i386) OPTIMIZATION+=$(call check_gcc,-march=i386,) @@ -169,7 +188,7 @@ ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0) OPTIMIZATION+=$(call check_gcc,-fno-branch-count-reg,) endif # gcc-4.1 and beyond endif -OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer +OPTIMIZATIONS:=$(OPTIMIZATION) $(call check_gcc,-fomit-frame-pointer,) # #-------------------------------------------------------- @@ -195,21 +214,22 @@ else endif ifeq ($(strip $(CONFIG_DEBUG)),y) CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE - LDFLAGS +=-Wl,-warn-common + LDFLAGS += $(call check_ld,-warn-common,) STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging else CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG - LDFLAGS += -Wl,-warn-common -Wl,--sort-common + LDFLAGS += $(call check_ld,-warn-common,) + LDFLAGS += $(call check_ld,--sort-common,) STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment endif ifeq ($(strip $(CONFIG_STATIC)),y) - LDFLAGS += --static + LDFLAGS += $(call check_ld,--static,) #else # LIBRARIES += -ldl endif ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y) - CFLAGS_PIC:= -fPIC #-DPIC + CFLAGS_PIC:= $(call check_gcc,-fPIC,) endif ifeq ($(strip $(CONFIG_SELINUX)),y) |