fragattacks/src/build.rules
Johannes Berg ac1447ae9d build: Rebuild libs all the time
When files change that go into a static library such as libutils.a, then
libutils.a doesn't get rebuilt from, e.g., wlantest because the
top-level Makefile just calls the library make if the library doesn't
exist yet.

Change that by making the library depend on a phony target (cannot make
it itself phony due to the pattern) so that the build will always
recurse into the library build, and check there if the library needs to
be rebuilt.

While at it, remove the (actually unnecessary) mkdir so it doesn't get
done each and every time you do 'make'.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-10-12 20:18:02 +03:00

110 lines
2.2 KiB
Plaintext

.PHONY: all
all: _all
# disable built-in rules
.SUFFIXES:
# setup some variables
ROOTDIR := $(dir $(lastword $(MAKEFILE_LIST)))
ROOTDIR := $(dir $(ROOTDIR:%../src/=%))../
BUILDDIR ?= $(abspath $(ROOTDIR)build)
BUILDDIR := $(BUILDDIR:%/=%)
ABSROOT := $(abspath $(ROOTDIR))
ifeq ($(origin OUT),command line)
_PROJ := $(OUT:%/=%)
_PROJ := $(_PROJ:$(BUILDDIR)/%=%)
else
_PROJ := $(abspath $(dir $(firstword $(MAKEFILE_LIST))))
_PROJ := $(_PROJ:$(ABSROOT)/%=%)
endif
ifndef CC
CC=gcc
endif
ifndef RANLIB
RANLIB=ranlib
endif
ifndef LDO
LDO=$(CC)
endif
ifndef CFLAGS
CFLAGS = -MMD -O2 -Wall -g
endif
ifneq ($(CONFIG_FILE),)
-include $(CONFIG_FILE)
# export for sub-makefiles
export CONFIG_CODE_COVERAGE
.PHONY: verify_config
verify_config:
@if [ ! -r $(CONFIG_FILE) ]; then \
echo 'Building $(firstword $(ALL)) requires a configuration file'; \
echo '(.config). See README for more instructions. You can'; \
echo 'run "cp defconfig .config" to create an example'; \
echo 'configuration.'; \
exit 1; \
fi
VERIFY := verify_config
else
VERIFY :=
endif
# default target
.PHONY: _all
_all: $(VERIFY) $(ALL) $(EXTRA_TARGETS)
# continue setup
COVSUFFIX := $(if $(CONFIG_CODE_COVERAGE),-cov,)
PROJ := $(_PROJ)$(COVSUFFIX)
Q=@
E=echo
ifeq ($(V), 1)
Q=
E=true
endif
ifeq ($(QUIET), 1)
Q=@
E=true
endif
ifeq ($(Q),@)
MAKEFLAGS += --no-print-directory
endif
_DIRS := $(BUILDDIR)/$(PROJ)
.PHONY: _make_dirs
_make_dirs:
@mkdir -p $(_DIRS)
$(BUILDDIR)/$(PROJ)/src/%.o: $(ROOTDIR)src/%.c $(CONFIG_FILE) | _make_dirs
$(Q)$(CC) -c -o $@ $(CFLAGS) $<
@$(E) " CC " $<
$(BUILDDIR)/$(PROJ)/%.o: %.c $(CONFIG_FILE) | _make_dirs
$(Q)$(CC) -c -o $@ $(CFLAGS) $<
@$(E) " CC " $<
# for the fuzzing tests
$(BUILDDIR)/$(PROJ)/wpa_supplicant/%.o: $(ROOTDIR)wpa_supplicant/%.c $(CONFIG_FILE) | _make_dirs
$(Q)$(CC) -c -o $@ $(CFLAGS) $<
@$(E) " CC " $<
# libraries - they know how to build themselves
# (lib_phony so we recurse all the time)
.PHONY: lib_phony
lib_phony:
# nothing
$(BUILDDIR)/$(PROJ)/%.a: $(CONFIG_FILE) lib_phony
$(Q)$(MAKE) -C $(ROOTDIR)$(dir $(@:$(BUILDDIR)/$(PROJ)/%=%)) OUT=$(abspath $(dir $@))/
BUILDOBJ = $(patsubst %,$(BUILDDIR)/$(PROJ)/%,$(patsubst $(ROOTDIR)%,%,$(1)))
.PHONY: common-clean
common-clean:
$(Q)rm -rf $(ALL) $(BUILDDIR)/$(PROJ)