[RFC/PATCH] Makefile: suppress some cppcheck false-positives

[Chris Packham <judge.packham@gmail.com>]

Pass a list of suppressions to cppcheck so that legitimate errors are
more obvious.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
---

On Thu, Dec 15, 2016 at 12:24 AM, Jeff King <peff@peff.net> wrote:
> The patch itself is OK to me, I guess. The interesting part will be
> whether people start actually _using_ cppcheck and squelching the false
> positives. I'm not sure how I feel about the in-code annotations. I'd
> have to see a patch first.

So here's a patch that adds supression files. It would work well for
things in contrib/compat that don't change that often. It would be a
nightmare to maintain for high-touch code.

 Makefile       | 7 ++++++-
 nedmalloc.supp | 4 ++++
 regcomp.supp   | 8 ++++++++
 3 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 nedmalloc.supp
 create mode 100644 regcomp.supp

diff --git a/Makefile b/Makefile
index e5c86decf..bb335ca0f 100644
--- a/Makefile
+++ b/Makefile
@@ -2637,7 +2637,12 @@ cover_db_html: cover_db
 
 .PHONY: cppcheck
 
-CPPCHECK_FLAGS = --force --quiet --inline-suppr $(if $(CPPCHECK_ADD),--enable=$(CPPCHECK_ADD))
+CPPCHECK_SUPP = --suppressions-list=nedmalloc.supp \
+	--suppressions-list=regcomp.supp
+
+CPPCHECK_FLAGS = --force --quiet --inline-suppr \
+	$(if $(CPPCHECK_ADD),--enable=$(CPPCHECK_ADD)) \
+	$(CPPCHECK_SUPP)
 
 cppcheck:
 	@cppcheck --version
diff --git a/nedmalloc.supp b/nedmalloc.supp
new file mode 100644
index 000000000..37bd54def
--- /dev/null
+++ b/nedmalloc.supp
@@ -0,0 +1,4 @@
+nullPointer:compat/nedmalloc/malloc.c.h:4093
+nullPointer:compat/nedmalloc/malloc.c.h:4106
+memleak:compat/nedmalloc/malloc.c.h:4646
+
diff --git a/regcomp.supp b/regcomp.supp
new file mode 100644
index 000000000..3ae023c26
--- /dev/null
+++ b/regcomp.supp
@@ -0,0 +1,8 @@
+memleak:compat/regex/regcomp.c:3086
+memleak:compat/regex/regcomp.c:3634
+memleak:compat/regex/regcomp.c:3086
+memleak:compat/regex/regcomp.c:3634
+uninitvar:compat/regex/regcomp.c:2802
+uninitvar:compat/regex/regcomp.c:2805
+memleak:compat/regex/regcomp.c:532
+
-- 
2.11.0.24.ge6920cf