diff options
Diffstat (limited to 'include/depends.mk')
| -rw-r--r-- | include/depends.mk | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/include/depends.mk b/include/depends.mk new file mode 100644 index 0000000..53e5b1e --- /dev/null +++ b/include/depends.mk @@ -0,0 +1,48 @@ +# +# Copyright (C) 2007 OpenWrt.org +# +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. +# +# define a dependency on a subtree +# parameters: +# 1: directories/files +# 2: directory dependency +# 3: tempfile for file listings +# 4: find options + +DEP_FINDPARAMS := -x "*/.svn*" -x ".*" -x "*:*" -x "*\!*" -x "* *" -x "*\\\#*" -x "*/.*_check" -x "*/.*.swp" + +find_md5=$(SH_FUNC) find $(1) -type f $(patsubst -x,-and -not -path,$(DEP_FINDPARAMS) $(2)) | md5s + +define rdep + .PRECIOUS: $(2) + .SILENT: $(2)_check + + $(2): $(2)_check + +ifneq ($(wildcard $(2)),) + $(2)_check:: + $(if $(3), \ + $(call find_md5,$(1),$(4)) > $(3).1; \ + { [ \! -f "$(3)" ] || diff $(3) $(3).1 >/dev/null; } && \ + ) \ + { \ + [ -f "$(2)_check.1" ] && mv "$(2)_check.1"; \ + $(TOPDIR)/scripts/timestamp.pl $(DEP_FINDPARAMS) $(4) -n $(2) $(1) && { \ + $(call debug_eval,$(SUBDIR),r,echo "No need to rebuild $(2)";) \ + touch -r "$(2)" "$(2)_check"; \ + } \ + } || { \ + $(call debug_eval,$(SUBDIR),r,echo "Need to rebuild $(2)";) \ + touch "$(2)_check"; \ + } + $(if $(3), mv $(3).1 $(3)) +else + $(2)_check:: + $(if $(3), rm -f $(3) $(3).1) + $(call debug_eval,$(SUBDIR),r,echo "Target $(2) not built") +endif + +endef + |