[Buildroot] [PATCH 0 of 2 v4] Add find utility functions / exclude files from strip

[Buildroot] [PATCH 0 of 2 v4] Add find utility functions / exclude files from strip

[Thomas De Schampheleire]

This patch series adds a few utility functions to Makefile.package.in that
help in composing find commands, and uses these functions to exclude
user-configured files and directories from being stripped in target-finalize.

Thanks to input from Arnout, the find functions are now much simpler and
should be clearly understandable by everyone.

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>

---
v4: simplify find functions even further; whitespace changes
v3: update based on review comments, remove Python changes for now
v2: simplify find functions

 Config.in                   |  19 +++++++++++++++++++
 Makefile                    |  10 ++++++++--
 package/Makefile.package.in |  10 ++++++++++
 3 files changed, 37 insertions(+), 2 deletions(-)

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

[Thomas De Schampheleire]

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@gmail.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@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))

[Buildroot] [PATCH 2 of 2 v4] build: add option to exclude executables/dirs from being stripped

[Thomas De Schampheleire]

Sometimes it may be desirable to keep debug symbols for some binaries and
libraries on the target. This commit introduces the config option
BR2_STRIP_EXCLUDE_FILES, which is interpreted as a list of such binaries
and libraries, and the option BR2_STRIP_EXCLUDE_DIRS, which indicates
directories excluded from stripping entirely.
These exclusions are passed to the find command in the target-finalize step.

Signed-off-by: Sven Neumann <s.neumann@raumfeld.com>
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

---
v4: whitespace changes
v3: merge with redundant patch 'stripping: use findfileclauses utility function'
v2: add the possibility to exclude entire directories

 Config.in |  19 +++++++++++++++++++
 Makefile  |  10 ++++++++--
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/Config.in b/Config.in
--- a/Config.in
+++ b/Config.in
@@ -262,6 +262,25 @@ config BR2_STRIP_none
 	  none    do not strip (only for debugging!)
 endchoice
 
+config BR2_STRIP_EXCLUDE_FILES
+	string "executables that should not be stripped"
+	depends on !BR2_STRIP_none
+	default ""
+	help
+	  You may specify a space-separated list of binaries and libraries
+	  here that should not be stripped on the target.
+
+config BR2_STRIP_EXCLUDE_DIRS
+	string "directories that should be skipped when stripping"
+	depends on !BR2_STRIP_none
+	default ""
+	help
+	  You may specify a space-separated list of directories that should
+	  be skipped when stripping. Binaries and libraries in these
+	  directories will not be touched.
+	  The directories should be specified relative to the target directory,
+	  without leading slash.
+
 choice
 	prompt "gcc optimization level"
 	default BR2_OPTIMIZE_S
diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
@@ -437,6 +437,13 @@ endif
 erase-fakeroots:
 	rm -f $(BUILD_DIR)/.fakeroot*
 
+STRIP_FIND_CMD = find $(TARGET_DIR)
+ifneq (,$(call qstrip,$(BR2_STRIP_EXCLUDE_DIRS)))
+STRIP_FIND_CMD += \( $(call finddirclauses,$(TARGET_DIR),$(call qstrip,$(BR2_STRIP_EXCLUDE_DIRS))) \) -prune -o
+endif
+STRIP_FIND_CMD += -type f -perm +111
+STRIP_FIND_CMD += -not \( $(call findfileclauses,libthread_db*.so* $(call qstrip,$(BR2_STRIP_EXCLUDE_FILES))) \) -print
+
 target-finalize:
 ifeq ($(BR2_HAVE_DEVFILES),y)
 	( support/scripts/copy.sh $(STAGING_DIR) $(TARGET_DIR) )
@@ -461,8 +468,7 @@ endif
 ifeq ($(BR2_PACKAGE_PYTHON_PYC_ONLY),y)
 	find $(TARGET_DIR)/usr/lib/ -name '*.py' -print0 | xargs -0 rm -f
 endif
-	find $(TARGET_DIR) -type f -perm +111 '!' -name 'libthread_db*.so*' | \
-		xargs $(STRIPCMD) 2>/dev/null || true
+	$(STRIP_FIND_CMD) | xargs $(STRIPCMD) 2>/dev/null || true
 	find $(TARGET_DIR)/lib/modules -type f -name '*.ko' | \
 		xargs -r $(KSTRIPCMD) || true
 

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

[Arnout Vandecappelle]

On Wednesday 15 February 2012 09:03:01 Thomas De Schampheleire wrote:
> 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@gmail.com>
> Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

-- 
Arnout Vandecappelle                               arnout at mind be
Senior Embedded Software Architect                 +32-16-286540
Essensium/Mind                                     http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium                BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F
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