Hu wrote:It looks like some expansion that was supposed to become a command instead expanded to the empty string, causing && to be the first non-empty token in that subexpression. It is not legal as an initial token, hence the shell error. Do you have any unusual environment variables set? Why are you building the kernel as root? If you can find the specific Makefile and line responsible for that recipe, you should be able to identify what variable expanded to an empty string.
Yep. Been strace'ing around and found the Makefile
/usr/src/linux-4.14.61-gentoo/tools/build/Makefile.build
Code: Select all
[pid 30488] execve("/bin/sh", ["/bin/sh", "-c", "set -e; && /usr/src/linux-4.14.61-gentoo/tools/objtool//fixdep /usr/src/linux-4.14.61-gentoo/tools/objtool/.exec-cmd.o.d /usr/src/linux-4.14.61-gentoo/tools/objtool/exec-cmd.o '' > /usr/src/linux-4.14.61-gentoo/tools/objtool/.exec-cmd.o.tmp; rm -f /usr/src/linux-4.14.61-gentoo/tools/objtool/.exec-cmd.o.d; mv -f /usr/src/linux-4.14.61-gentoo/tools/objtool/.exec-cmd.o.tmp /usr/src/linux-4.14.61-gentoo/tools/objtool/.exec-cmd.o.cmd"], 0x55d81c22aad0 /* 155 vars */ <unfinished ...>
Here's the file:
Code: Select all
# SPDX-License-Identifier: GPL-2.0
###
# Main build makefile.
#
# Lots of this code have been borrowed or heavily inspired from parts
# of kbuild code, which is not credited, but mostly developed by:
#
# Copyright (C) Sam Ravnborg <sam@mars.ravnborg.org>, 2015
# Copyright (C) Linus Torvalds <torvalds@linux-foundation.org>, 2015
#
PHONY := __build
__build:
ifeq ($(V),1)
quiet =
Q =
else
quiet=quiet_
Q=@
endif
ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
quiet=silent_
endif
build-dir := $(srctree)/tools/build
# Define $(fixdep) for dep-cmd function
ifeq ($(OUTPUT),)
fixdep := $(build-dir)/fixdep
else
fixdep := $(OUTPUT)/fixdep
endif
# Generic definitions
include $(build-dir)/Build.include
# do not force detected configuration
-include $(OUTPUT).config-detected
# Init all relevant variables used in build files so
# 1) they have correct type
# 2) they do not inherit any value from the environment
subdir-y :=
obj-y :=
subdir-y :=
subdir-obj-y :=
# Build definitions
build-file := $(dir)/Build
-include $(build-file)
quiet_cmd_flex = FLEX $@
quiet_cmd_bison = BISON $@
# Create directory unless it exists
quiet_cmd_mkdir = MKDIR $(dir $@)
cmd_mkdir = mkdir -p $(dir $@)
rule_mkdir = $(if $(wildcard $(dir $@)),,@$(call echo-cmd,mkdir) $(cmd_mkdir))
# Compile command
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_cxx_o_c = CXX $@
cmd_cxx_o_c = $(CXX) $(cxx_flags) -c -o $@ $<
quiet_cmd_cpp_i_c = CPP $@
cmd_cpp_i_c = $(CC) $(c_flags) -E -o $@ $<
quiet_cmd_cc_s_c = AS $@
cmd_cc_s_c = $(CC) $(c_flags) -S -o $@ $<
quiet_cmd_gen = GEN $@
# Link agregate command
# If there's nothing to link, create empty $@ object.
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)
$(call if_changed_dep,$(host)cc_o_c)
$(OUTPUT)%.o: %.cpp FORCE
$(call rule_mkdir)
$(call if_changed_dep,cxx_o_c)
$(OUTPUT)%.o: %.S FORCE
$(call rule_mkdir)
$(call if_changed_dep,$(host)cc_o_c)
$(OUTPUT)%.i: %.c FORCE
$(call rule_mkdir)
$(call if_changed_dep,cpp_i_c)
$(OUTPUT)%.s: %.S FORCE
$(call rule_mkdir)
$(call if_changed_dep,cpp_i_c)
$(OUTPUT)%.s: %.c FORCE
$(call rule_mkdir)
$(call if_changed_dep,cc_s_c)
# Gather build data:
# obj-y - list of build objects
# subdir-y - list of directories to nest
# subdir-obj-y - list of directories objects 'dir/$(obj)-in.o'
obj-y := $($(obj)-y)
subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
obj-y := $(patsubst %/, %/$(obj)-in.o, $(obj-y))
subdir-obj-y := $(filter %/$(obj)-in.o, $(obj-y))
# '$(OUTPUT)/dir' prefix to all objects
objprefix := $(subst ./,,$(OUTPUT)$(dir)/)
obj-y := $(addprefix $(objprefix),$(obj-y))
subdir-obj-y := $(addprefix $(objprefix),$(subdir-obj-y))
# Final '$(obj)-in.o' object
in-target := $(objprefix)$(obj)-in.o
PHONY += $(subdir-y)
$(subdir-y):
$(Q)$(MAKE) -f $(build-dir)/Makefile.build dir=$(dir)/$@ obj=$(obj)
$(sort $(subdir-obj-y)): $(subdir-y) ;
$(in-target): $(obj-y) FORCE
$(call rule_mkdir)
$(call if_changed,$(host)ld_multi)
__build: $(in-target)
@:
PHONY += FORCE
FORCE:
# Include all cmd files to get all the dependency rules
# for all objects included
targets := $(wildcard $(sort $(obj-y) $(in-target) $(MAKECMDGOALS)))
cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
ifneq ($(cmd_files),)
include $(cmd_files)
endif
.PHONY: $(PHONY)
