mtd/mtd-user.h is missing on FreeBSD hosts; add a macro to test whether a specific host header is present and use it to decide to build fw_printenv if mtd/mtd-user.h is present. ---
How about this approach?
If it's ok, then I could extend it to handle the MTD_VERSION=old case as well, perhaps replacing this MTD_VERSION with a test for linux/mtd/mtd.h.
I would have preferred putting this in /Makefile to disable the make -C tools/env altogether, but config.mk isn't included by default so HOSTCC isn't available for the test.
tools/env/Makefile | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/tools/env/Makefile b/tools/env/Makefile index 2f7a59c..294bb95 100644 --- a/tools/env/Makefile +++ b/tools/env/Makefile @@ -36,7 +36,18 @@ ifeq ($(MTD_VERSION),old) HOSTCPPFLAGS += -DMTD_OLD endif
+# macro to check whether a host header is present; outputs 1 if present, 0 if +# not +check_include = $(shell echo | $(HOSTCC) $(HOSTCFLAGS_NOPED) -E -include $(1) -o /dev/null - 2>/dev/null && echo 1 || echo 0) + +# whether to build tools/env or not +has_mtd_user := $(call check_include, mtd/mtd-user.h) + +ifeq ($(has_mtd_user),1) all: $(obj)fw_printenv +else +all: +endif
# Some files complain if compiled with -pedantic, use HOSTCFLAGS_NOPED $(obj)fw_printenv: $(HOSTSRCS) $(HEADERS)