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| author |  Ian Rogers <irogers@google.com>
| 2023-01-26 11:06:06 -0800 |
|---|---|---|
| committer |  Josh Poimboeuf <jpoimboe@kernel.org>
| 2023-02-01 09:15:18 -0800 |
| commit | cd955bdd6aa5ec54cdef622a142f8899a64b5446 (patch) | |
| tree | 729a92ef012b90e68e36ee2e09729041d8391645 /tools/objtool | |
| parent | objtool: Properly support make V=1 (diff) | |
| download | linux-cd955bdd6aa5ec54cdef622a142f8899a64b5446.tar.gz linux-cd955bdd6aa5ec54cdef622a142f8899a64b5446.tar.bz2 linux-cd955bdd6aa5ec54cdef622a142f8899a64b5446.zip | |
objtool: Fix HOSTCC flag usage
HOSTCC is always wanted when building objtool. Setting CC to HOSTCC
happens after tools/scripts/Makefile.include is included, meaning
flags (like CFLAGS) are set assuming say CC is gcc, but then it can be
later set to HOSTCC which may be clang. tools/scripts/Makefile.include
is needed for host set up and common macros in objtool's
Makefile. Rather than override the CC variable to HOSTCC, just pass CC
as HOSTCC to the sub-makes of Makefile.build, the libsubcmd builds and
also to the linkage step.
Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20230126190606.40739-4-irogers@google.com
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/Makefile | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile index d54b66986627..83b100c1e7f6 100644 --- a/tools/objtool/Makefile +++ b/tools/objtool/Makefile @@ -2,11 +2,6 @@ include ../scripts/Makefile.include include ../scripts/Makefile.arch -# always use the host compiler -AR = $(HOSTAR) -CC = $(HOSTCC) -LD = $(HOSTLD) - ifeq ($(srctree),) srctree := $(patsubst %/,%,$(dir $(CURDIR))) srctree := $(patsubst %/,%,$(dir $(srctree))) @@ -34,13 +29,18 @@ INCLUDES := -I$(srctree)/tools/include \ -I$(srctree)/tools/objtool/include \ -I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \ -I$(LIBSUBCMD_OUTPUT)/include +# Note, EXTRA_WARNINGS here was determined for CC and not HOSTCC, it +# is passed here to match a legacy behavior. WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed -Wno-nested-externs -CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS) -LDFLAGS += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS) +OBJTOOL_CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS) +OBJTOOL_LDFLAGS := $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS) # Allow old libelf to be used: -elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr) -CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED) +elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(HOSTCC) $(OBJTOOL_CFLAGS) -x c -E - | grep elf_getshdr) +OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED) + +# Always want host compilation. +HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" AWK = awk MKDIR = mkdir @@ -61,12 +61,14 @@ export BUILD_ORC export srctree OUTPUT CFLAGS SRCARCH AWK include $(srctree)/tools/build/Makefile.include -$(OBJTOOL_IN): fixdep FORCE +$(OBJTOOL_IN): fixdep $(LIBSUBCMD) FORCE $(Q)$(CONFIG_SHELL) ./sync-check.sh - $(Q)$(MAKE) $(build)=objtool + $(Q)$(MAKE) $(build)=objtool $(HOST_OVERRIDES) CFLAGS="$(OBJTOOL_CFLAGS)" \ + LDFLAGS="$(OBJTOOL_LDFLAGS)" + $(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN) - $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@ + $(QUIET_LINK)$(HOSTCC) $(OBJTOOL_IN) $(OBJTOOL_LDFLAGS) -o $@ $(LIBSUBCMD_OUTPUT): @@ -75,6 +77,7 @@ $(LIBSUBCMD_OUTPUT): $(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE $(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \ DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \ + $(HOST_OVERRIDES) EXTRA_CFLAGS="$(OBJTOOL_CFLAGS)" \ $@ install_headers $(LIBSUBCMD)-clean: |