Commit 0c3b7e42 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

tools build: Add support for host programs format 



In some cases, like for fixdep and shortly for jevents, we need to build a tool
to run on the host that will be used in building a tool, such as perf, that is
being cross compiled, so do like the kernel and provide HOSTCC, HOSTLD and HOSTAR
to do that.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Requested-by: default avatarAndi Kleen <andi@firstfloor.org>
Requested-and-Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/20160927141846.GA6589@krava


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 18ef15c6

tools/build/Build.include

+5 −0
Original line number Diff line number Diff line
@@ -90,3 +90,8 @@ if_changed = $(if $(strip $(any-prereq) $(arg-check)), \ 
# - per object C flags

# - BUILD_STR macro to allow '-D"$(variable)"' constructs

c_flags = -Wp,-MD,$(depfile),-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))



###

## HOSTCC C flags



host_c_flags = -Wp,-MD,$(depfile),-MT,$@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))

tools/build/Makefile

+6 −0
Original line number Diff line number Diff line
@@ -14,6 +14,12 @@ endef 
$(call allow-override,CC,$(CROSS_COMPILE)gcc)

$(call allow-override,LD,$(CROSS_COMPILE)ld)



HOSTCC ?= gcc

HOSTLD ?= ld

HOSTAR ?= ar



export HOSTCC HOSTLD HOSTAR



ifeq ($(V),1)

  Q =

else

tools/build/Makefile.build

+15 −4
Original line number Diff line number Diff line
@@ -58,6 +58,9 @@ quiet_cmd_mkdir = MKDIR $(dir $@) 
quiet_cmd_cc_o_c = CC       $@

      cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<



quiet_cmd_host_cc_o_c = HOSTCC   $@

      cmd_host_cc_o_c = $(HOSTCC) $(host_c_flags) -c -o $@ $<



quiet_cmd_cpp_i_c = CPP      $@

      cmd_cpp_i_c = $(CC) $(c_flags) -E -o $@ $<
@@ -72,14 +75,22 @@ quiet_cmd_ld_multi = LD $@ 
      cmd_ld_multi = $(if $(strip $(obj-y)),\

                     $(LD) -r -o $@  $(filter $(obj-y),$^),rm -f $@; $(AR) rcs $@)



quiet_cmd_host_ld_multi = HOSTLD   $@

      cmd_host_ld_multi = $(if $(strip $(obj-y)),\

                          $(HOSTLD) -r -o $@  $(filter $(obj-y),$^),rm -f $@; $(HOSTAR) rcs $@)



ifneq ($(filter $(obj),$(hostprogs)),)

  host = host_

endif



# Build rules

$(OUTPUT)%.o: %.c FORCE

	$(call rule_mkdir)

	$(call if_changed_dep,cc_o_c)

	$(call if_changed_dep,$(host)cc_o_c)



$(OUTPUT)%.o: %.S FORCE

	$(call rule_mkdir)

	$(call if_changed_dep,cc_o_c)

	$(call if_changed_dep,$(host)cc_o_c)



$(OUTPUT)%.i: %.c FORCE

	$(call rule_mkdir)
@@ -119,7 +130,7 @@ $(sort $(subdir-obj-y)): $(subdir-y) ; 


$(in-target): $(obj-y) FORCE

	$(call rule_mkdir)

	$(call if_changed,ld_multi)

	$(call if_changed,$(host)ld_multi)



__build: $(in-target)

	@:

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