.travis.yml: add a travis build entry to run tests under valgrind

Makefile.am: add valgrind to the AM_TESTS_ENVIRONMENT
configure.ac: enable valgrind testing option for ./configure
m4/valgrind-tests.m4: enable tracing children for libtool wrapper
script compatibility, but ignore standard binaries in /usr or /bin

.travis.yml

@@ -9,3 +9,5 @@ install:
 script:
     - ./autogen.sh
     - ./configure && make distcheck && make clean
+    - ./configure --enable-valgrind-tests && make distcheck
+      DISTCHECK_CONFIGURE_FLAGS="--enable-valgrind-tests" && make clean

Makefile.am

@@ -92,6 +92,8 @@ protoc_c_protoc_c_LDADD = \
 # protobuf-c tests
 #
 
+AM_TESTS_ENVIRONMENT = $(VALGRIND)
+
 check_PROGRAMS += \
 	t/generated-code/test-generated-code \
 	t/generated-code2/test-generated-code2

configure.ac

@@ -41,6 +41,8 @@ else
 fi
 AM_CONDITIONAL([BUILD_COMPILER], [test "x$enable_protoc" != "xno"])
 
+gl_VALGRIND_TESTS
+
 AC_C_BIGENDIAN
 
 AC_OUTPUT

m4/valgrind-tests.m4

@@ -23,7 +23,8 @@ AC_DEFUN([gl_VALGRIND_TESTS],
 
   if test -n "$VALGRIND" && $VALGRIND -q true > /dev/null 2>&1; then
     opt_valgrind_tests=yes
-    VALGRIND="$VALGRIND -q --error-exitcode=1 --leak-check=full"
+    VALGRIND="$VALGRIND -q --error-exitcode=1 --leak-check=full \
+	--trace-children=yes --trace-children-skip=/usr/*,/bin/*"
   else
     opt_valgrind_tests=no
     VALGRIND=