[Buildroot] [PATCH 1 of 2 v4] Makefile.package.in: add utility functions find*clauses and notfirstword

Thomas De Schampheleire patrickdepinguin+buildroot at gmail.com
Wed Feb 15 08:03:01 UTC 2012


This patch adds a few utility functions to Makefile.package.in.

Functions finddirclauses and findfileclauses help in building a find command
that skips a set of directories and performs operations on a set of files.
This pattern can for example be used to keep certain files or directories from
being stripped, or to remove certain files from a package installation.

The notfirstword function is the inverse of the 'firstword' function in make:
it returns all but the first word.

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire at gmail.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>

---
v4: simplify find*clauses even further. Thanks, Arnout!
v3: use -path instead of -wholename; fix a bug in finddirclauses. Thanks, Cam.
v2: integrate _cont variants in main find*clauses functions. Thanks, Arnout.

 package/Makefile.package.in |  10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/package/Makefile.package.in b/package/Makefile.package.in
--- a/package/Makefile.package.in
+++ b/package/Makefile.package.in
@@ -87,6 +87,16 @@ MESSAGE = echo "$(TERM_BOLD)>>> $($(PKG)
 TERM_BOLD := $(shell tput smso)
 TERM_RESET := $(shell tput rmso)
 
+# Utility functions for 'find'
+# findfileclauses(filelist) => -name 'X' -o -name 'Y'
+findfileclauses = $(call notfirstword,$(patsubst %,-o -name '%',$(1)))
+# finddirclauses(base, dirlist) => -path 'base/dirX' -o -path 'base/dirY'
+finddirclauses = $(call notfirstword,$(patsubst %,-o -path '$(1)/%',$(2)))
+
+# Miscellaneous utility functions
+# notfirstword(wordlist): returns all but the first word in wordlist
+notfirstword = $(wordlist 2,$(words $(1)),$(1))
+
 # Download method commands
 WGET:=$(call qstrip,$(BR2_WGET)) $(QUIET)
 SVN:=$(call qstrip,$(BR2_SVN))


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