| 1 | # |
| 2 | # Copyright (C) 2006-2007 OpenWrt.org |
| 3 | # |
| 4 | # This is free software, licensed under the GNU General Public License v2. |
| 5 | # See /LICENSE for more information. |
| 6 | # |
| 7 | |
| 8 | ifneq ($(__prereq_inc),1) |
| 9 | __prereq_inc:=1 |
| 10 | |
| 11 | prereq: |
| 12 | if [ -f $(TMP_DIR)/.prereq-error ]; then \ |
| 13 | echo; \ |
| 14 | cat $(TMP_DIR)/.prereq-error; \ |
| 15 | rm -f $(TMP_DIR)/.prereq-error; \ |
| 16 | echo; \ |
| 17 | false; \ |
| 18 | fi |
| 19 | |
| 20 | .SILENT: prereq |
| 21 | endif |
| 22 | |
| 23 | define Require |
| 24 | export PREREQ_CHECK=1 |
| 25 | ifeq ($$(CHECK_$(1)),) |
| 26 | prereq: prereq-$(1) |
| 27 | |
| 28 | prereq-$(1): FORCE |
| 29 | echo -n "Checking '$(1)'... " |
| 30 | if $(NO_TRACE_MAKE) -f $(firstword $(MAKEFILE_LIST)) check-$(1) >/dev/null 2>/dev/null; then \ |
| 31 | echo 'ok.'; \ |
| 32 | else \ |
| 33 | echo 'failed.'; \ |
| 34 | echo -e "$(PKG_NAME): $(strip $(2))" | perl -ne 's/\\\s*/\n/g,print' >> $(TMP_DIR)/.prereq-error; \ |
| 35 | fi |
| 36 | |
| 37 | check-$(1): FORCE |
| 38 | $(call Require/$(1)) |
| 39 | CHECK_$(1):=1 |
| 40 | |
| 41 | .SILENT: prereq-$(1) check-$(1) |
| 42 | endif |
| 43 | endef |
| 44 | |
| 45 | |
| 46 | define RequireCommand |
| 47 | define Require/$(1) |
| 48 | which $(1) |
| 49 | endef |
| 50 | |
| 51 | $$(eval $$(call Require,$(1),$(2))) |
| 52 | endef |
| 53 | |
| 54 | define RequireHeader |
| 55 | define Require/$(1) |
| 56 | [ -e "$(1)" ] |
| 57 | endef |
| 58 | |
| 59 | $$(eval $$(call Require,$(1),$(2))) |
| 60 | endef |
| 61 | |
| 62 | .NOTPARALLEL: |
| 63 | |
