On Tue, Jan 17, 2023 at 03:20:38PM -0800, Ian Rogers wrote: > On Tue, Jan 17, 2023 at 2:07 PM Jiri Olsa <olsajiri@xxxxxxxxx> wrote: > > > > On Mon, Jan 16, 2023 at 01:57:51PM -0800, Ian Rogers wrote: > > > HOSTCC is always wanted when building. Setting CC to HOSTCC happens > > > after tools/scripts/Makefile.include is included, meaning flags 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 > > > CC to HOSTCC, just pass CC as HOSTCC to Makefile.build, the libsubcmd > > > builds and the linkage step. This means the Makefiles don't see things > > > like CC changing and tool flag determination, and similar, work > > > properly. > > > > > > Also, clear the passed subdir as otherwise an outer build may break by > > > inadvertently passing an inappropriate value. > > > > > > Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx> > > > > lgtm did you try cross build and build with clang? > > Hmm.. I don't have a cross build but I checked clang. Any chance you > could check the cross build? ok, I'll try tomorrow jirka > > Thanks, > Ian > > > jirka > > > > > --- > > > tools/bpf/resolve_btfids/Makefile | 17 +++++++---------- > > > 1 file changed, 7 insertions(+), 10 deletions(-) > > > > > > diff --git a/tools/bpf/resolve_btfids/Makefile b/tools/bpf/resolve_btfids/Makefile > > > index 76b737b2560d..515d87b32fb8 100644 > > > --- a/tools/bpf/resolve_btfids/Makefile > > > +++ b/tools/bpf/resolve_btfids/Makefile > > > @@ -18,14 +18,11 @@ else > > > endif > > > > > > # always use the host compiler > > > -AR = $(HOSTAR) > > > -CC = $(HOSTCC) > > > -LD = $(HOSTLD) > > > -ARCH = $(HOSTARCH) > > > +HOST_OVERRIDES := AR=$(HOSTAR) CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" \ > > > + ARCH=$(HOSTARCH) EXTRA_CFLAGS="$(HOSTCFLAGS) $(KBUILD_HOSTCFLAGS)" > > > + > > > RM ?= rm > > > CROSS_COMPILE = > > > -CFLAGS := $(KBUILD_HOSTCFLAGS) > > > -LDFLAGS := $(KBUILD_HOSTLDFLAGS) > > > > > > OUTPUT ?= $(srctree)/tools/bpf/resolve_btfids/ > > > > > > @@ -56,12 +53,12 @@ $(OUTPUT) $(OUTPUT)/libsubcmd $(LIBBPF_OUT): > > > > > > $(SUBCMDOBJ): fixdep FORCE | $(OUTPUT)/libsubcmd > > > $(Q)$(MAKE) -C $(SUBCMD_SRC) OUTPUT=$(SUBCMD_OUT) \ > > > - DESTDIR=$(SUBCMD_DESTDIR) prefix= \ > > > + DESTDIR=$(SUBCMD_DESTDIR) $(HOST_OVERRIDES) prefix= subdir= \ > > > $(abspath $@) install_headers > > > > > > $(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUT) > > > $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(LIBBPF_OUT) \ > > > - DESTDIR=$(LIBBPF_DESTDIR) prefix= EXTRA_CFLAGS="$(CFLAGS)" \ > > > + DESTDIR=$(LIBBPF_DESTDIR) $(HOST_OVERRIDES) prefix= subdir= \ > > > $(abspath $@) install_headers > > > > > > CFLAGS += -g \ > > > @@ -76,11 +73,11 @@ export srctree OUTPUT CFLAGS Q > > > include $(srctree)/tools/build/Makefile.include > > > > > > $(BINARY_IN): fixdep FORCE prepare | $(OUTPUT) > > > - $(Q)$(MAKE) $(build)=resolve_btfids > > > + $(Q)$(MAKE) $(build)=resolve_btfids $(HOST_OVERRIDES) > > > > > > $(BINARY): $(BPFOBJ) $(SUBCMDOBJ) $(BINARY_IN) > > > $(call msg,LINK,$@) > > > - $(Q)$(CC) $(BINARY_IN) $(LDFLAGS) -o $@ $(BPFOBJ) $(SUBCMDOBJ) $(LIBS) > > > + $(Q)$(HOSTCC) $(BINARY_IN) $(KBUILD_HOSTLDFLAGS) -o $@ $(BPFOBJ) $(SUBCMDOBJ) $(LIBS) > > > > > > clean_objects := $(wildcard $(OUTPUT)/*.o \ > > > $(OUTPUT)/.*.o.cmd \ > > > -- > > > 2.39.0.314.g84b9a713c41-goog > > >
