include/prereq.mk

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 #
   3 # Copyright (C) 2006-2020 OpenWrt.org
   4
   5 ifneq ($(__prereq_inc),1)
   6 __prereq_inc:=1
   7
   8 prereq:
   9         if [ -f $(TMP_DIR)/.prereq-error ]; then \
  10                 echo; \
  11                 cat $(TMP_DIR)/.prereq-error; \
  12                 rm -f $(TMP_DIR)/.prereq-error; \
  13                 echo; \
  14                 false; \
  15         fi
  16
  17 .SILENT: prereq
  18 endif
  19
  20 PREREQ_PREV=
  21
  22 # 1: display name
  23 # 2: error message
  24 define Require
  25   export PREREQ_CHECK=1
  26   ifeq ($$(CHECK_$(1)),)
  27     prereq: prereq-$(1)
  28
  29     prereq-$(1): $(if $(PREREQ_PREV),prereq-$(PREREQ_PREV)) FORCE
  30                 printf "Checking '$(1)'... "
  31                 if $(NO_TRACE_MAKE) -f $(firstword $(MAKEFILE_LIST)) check-$(1) PATH="$(ORIG_PATH)" >/dev/null 2>/dev/null; then \
  32                         echo 'ok.'; \
  33                 elif $(NO_TRACE_MAKE) -f $(firstword $(MAKEFILE_LIST)) check-$(1) PATH="$(ORIG_PATH)" >/dev/null 2>/dev/null; then \
  34                         echo 'updated.'; \
  35                 else \
  36                         echo 'failed.'; \
  37                         echo "$(PKG_NAME): $(strip $(2))" >> $(TMP_DIR)/.prereq-error; \
  38                 fi
  39
  40     check-$(1): FORCE
  41           $(call Require/$(1))
  42     CHECK_$(1):=1
  43
  44     .SILENT: prereq-$(1) check-$(1)
  45     .NOTPARALLEL:
  46   endif
  47
  48   PREREQ_PREV=$(1)
  49 endef
  50
  51
  52 define RequireCommand
  53   define Require/$(1)
  54     command -v $(1)
  55   endef
  56
  57   $$(eval $$(call Require,$(1),$(2)))
  58 endef
  59
  60 define RequireHeader
  61   define Require/$(1)
  62     [ -e "$(1)" ]
  63   endef
  64
  65   $$(eval $$(call Require,$(1),$(2)))
  66 endef
  67
  68 # 1: header to test
  69 # 2: failure message
  70 # 3: optional compile time test
  71 # 4: optional link library test (example -lncurses)
  72 define RequireCHeader
  73   define Require/$(1)
  74     echo 'int main(int argc, char **argv) { $(3); return 0; }' | gcc -include $(1) -x c -o $(TMP_DIR)/a.out - $(4)
  75   endef
  76
  77   $$(eval $$(call Require,$(1),$(2)))
  78 endef
  79
  80 define QuoteHostCommand
  81 '$(subst ','"'"',$(strip $(1)))'
  82 endef
  83
  84 # 1: display name
  85 # 2: failure message
  86 # 3: test
  87 define TestHostCommand
  88   define Require/$(1)
  89         ($(3)) >/dev/null 2>/dev/null
  90   endef
  91
  92   $$(eval $$(call Require,$(1),$(2)))
  93 endef
  94
  95 # 1: canonical name
  96 # 2: failure message
  97 # 3+: candidates
  98 define SetupHostCommand
  99   define Require/$(1)
 100         mkdir -p "$(STAGING_DIR_HOST)/bin"; \
 101         for cmd in $(call QuoteHostCommand,$(3)) $(call QuoteHostCommand,$(4)) \
 102                    $(call QuoteHostCommand,$(5)) $(call QuoteHostCommand,$(6)) \
 103                    $(call QuoteHostCommand,$(7)) $(call QuoteHostCommand,$(8)) \
 104                    $(call QuoteHostCommand,$(9)) $(call QuoteHostCommand,$(10)) \
 105                    $(call QuoteHostCommand,$(11)) $(call QuoteHostCommand,$(12)); do \
 106                 if [ -n "$$$$$$$$cmd" ]; then \
 107                         bin="$$$$$$$$(command -v "$$$$$$$${cmd%% *}")"; \
 108                         if [ -x "$$$$$$$$bin" ] && eval "$$$$$$$$cmd" >/dev/null 2>/dev/null; then \
 109                                 case "$$$$$$$$(ls -dl -- $(STAGING_DIR_HOST)/bin/$(strip $(1)))" in \
 110                                         *" -> $$$$$$$$bin"*) \
 111                                                 [ -x "$(STAGING_DIR_HOST)/bin/$(strip $(1))" ] && exit 0 \
 112                                                 ;; \
 113                                 esac; \
 114                                 ln -sf "$$$$$$$$bin" "$(STAGING_DIR_HOST)/bin/$(strip $(1))"; \
 115                                 exit 1; \
 116                         fi; \
 117                 fi; \
 118         done; \
 119         exit 1
 120   endef
 121
 122   $$(eval $$(call Require,$(1),$(if $(2),$(2),Missing $(1) command)))
 123 endef