Provide a simple way to run Coccinelle against all source files, in the
form of a Makefile target.  Running "make coccicheck" applies each
.cocci file in contrib/coccinelle/ on all source files.  It generates
a .patch file for each .cocci file, containing the actual changes for
effecting the transformations described by the semantic patches.

Non-empty .patch files are reported.  They can be applied to the work
tree using "patch -p0", but should be checked to e.g. make sure they
don't screw up formatting or create circular references.

Coccinelle's diagnostic output (stderr) is piped into .log files.

Linux has a much more elaborate make target of the same name; let's
start nice and easy.

Signed-off-by: Rene Scharfe <l....@web.de>
---
 Makefile | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Makefile b/Makefile
index 7f18492..74b2788 100644
--- a/Makefile
+++ b/Makefile
@@ -461,6 +461,7 @@ CURL_CONFIG = curl-config
 PTHREAD_LIBS = -lpthread
 PTHREAD_CFLAGS =
 GCOV = gcov
+SPATCH = spatch
 
 export TCL_PATH TCLTK_PATH
 
@@ -2307,6 +2308,18 @@ check: common-cmds.h
                exit 1; \
        fi
 
+C_SOURCES = $(patsubst %.o,%.c,$(C_OBJ))
+%.cocci.patch: %.cocci $(C_SOURCES)
+       @echo '    ' SPATCH $<; \
+       for f in $(C_SOURCES); do \
+               $(SPATCH) --sp-file $< $$f; \
+       done >$@ 2>$@.log; \
+       if test -s $@; \
+       then \
+               echo '    ' SPATCH result: $@; \
+       fi
+coccicheck: $(patsubst %.cocci,%.cocci.patch,$(wildcard 
contrib/coccinelle/*.cocci))
+
 ### Installation rules
 
 ifneq ($(filter /%,$(firstword $(template_dir))),)
@@ -2498,6 +2511,7 @@ clean: profile-clean coverage-clean
        $(RM) -r $(GIT_TARNAME) .doc-tmp-dir
        $(RM) $(GIT_TARNAME).tar.gz git-core_$(GIT_VERSION)-*.tar.gz
        $(RM) $(htmldocs).tar.gz $(manpages).tar.gz
+       $(RM) contrib/coccinelle/*.cocci.patch*
        $(MAKE) -C Documentation/ clean
 ifndef NO_PERL
        $(MAKE) -C gitweb clean
-- 
2.10.0

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