build: Add build flag to enable sparse checking of C source files

Similar to the 'make C=1' for the Linux kernel, wire up the sparse
command for our build system in a similar fashion. Use 'make C=1 [tool]'
to check the source files using sparse. Of course, the sparse tool needs
to be installed and available in your $PATH for this to work.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 7 insertions, 0 deletions

diff --git a/Cmds b/Cmds
index 9d2675f..247a972 100644
--- a/Cmds
+++ b/Cmds
@@ -14,6 +14,13 @@ else
   STRIP = $(Q)echo -e "  STRIP\t$@" && $(CROSS_COMPILE)strip
 endif
 
+# sparse related
+ifeq ($(C), 1)
+  CHECK = $(Q)echo -e "  CHECK\t$<" && sparse
+else
+  CHECK = $(Q)true
+endif
+
 # Flex/bison related
 LEX = $(Q)echo -e "  LEX\t$<" && flex
 YAAC = $(Q)echo -e "  YAAC\t$<" && bison