Merge pull request #9703 from miri64/pkg/fix/format-str-literal

pkg: deal with format string non-literals

pkg/libcoap/Makefile

@@ -12,3 +12,7 @@ all: git-download
 	"$(MAKE)" -C $(PKG_BUILDDIR)
 
 include $(RIOTBASE)/pkg/pkg.mk
+
+ifeq (llvm,$(TOOLCHAIN))
+  CFLAGS += -Wno-format-nonliteral
+endif

pkg/openthread/contrib/platform_logging.c

@@ -28,6 +28,7 @@
 
 /* adapted from OpenThread posix example:
  * See: https://github.com/openthread/openthread/blob/master/examples/platforms/posix/logging.c */
+__attribute__((__format__ (__printf__, 3, 4)))
 void otPlatLog(otLogLevel aLogLevel, otLogRegion aLogRegion, const char *aFormat, ...)
 {
     va_list args;

pkg/tinydtls/Makefile

@@ -17,3 +17,7 @@ all: git-download
 	"$(MAKE)" -C $(PKG_BUILDDIR)
 
 include $(RIOTBASE)/pkg/pkg.mk
+
+ifeq (llvm,$(TOOLCHAIN))
+  CFLAGS += -Wno-format-nonliteral
+endif