diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 32 |
1 files changed, 28 insertions, 4 deletions
@@ -299,9 +299,7 @@ KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) # have older compilers as their default, so we make it explicit for # these that our host tools are GNU11 (i.e. C11 w/ GNU extensions). CSTD_FLAG := -std=gnu11 -ifeq ($(HOSTOS),linux) KBUILD_HOSTCFLAGS += $(CSTD_FLAG) -endif ifeq ($(HOSTOS),cygwin) KBUILD_HOSTCFLAGS += -ansi @@ -415,7 +413,13 @@ PERL = perl PYTHON ?= python PYTHON2 = python2 PYTHON3 ?= python3 -DTC ?= $(objtree)/scripts/dtc/dtc + +# The devicetree compiler and pylibfdt are automatically built unless DTC is +# provided. If DTC is provided, it is assumed the pylibfdt is available too. +DTC_INTREE := $(objtree)/scripts/dtc/dtc +DTC ?= $(DTC_INTREE) +DTC_MIN_VERSION := 010406 + CHECK = sparse CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ @@ -1951,9 +1955,29 @@ endif endif +# Check dtc and pylibfdt, if DTC is provided, else build them PHONY += scripts_dtc scripts_dtc: scripts_basic - $(Q)$(MAKE) $(build)=scripts/dtc + $(Q)if test "$(DTC)" = "$(DTC_INTREE)"; then \ + $(MAKE) $(build)=scripts/dtc; \ + else \ + if ! $(DTC) -v >/dev/null; then \ + echo '*** Failed to check dtc version: $(DTC)'; \ + false; \ + else \ + if test "$(call dtc-version)" -lt $(DTC_MIN_VERSION); then \ + echo '*** Your dtc is too old, please upgrade to dtc $(DTC_MIN_VERSION) or newer'; \ + false; \ + else \ + if [ -n "$(CONFIG_PYLIBFDT)" ]; then \ + if ! echo "import libfdt" | $(PYTHON3) 2>/dev/null; then \ + echo '*** pylibfdt does not seem to be available with $(PYTHON3)'; \ + false; \ + fi; \ + fi; \ + fi; \ + fi; \ + fi # --------------------------------------------------------------------------- quiet_cmd_cpp_lds = LDS $@ |