unit-tests: implement the unit-testing framework

This set of patches adds a simple unit-testing framework to Busybox

unit-tests: add some helper macros for unit-test framework implementation
unit-tests: implement the unit-testing framework
unit-tests: add basic documentation on writing the unit test cases
unit-tests: modify the Makefile 'test' target to run unit-tests too
unit-tests: add two example test cases
unit-tests: modify the existing strrstr test code to use the unit-test framework

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/platform.h b/include/platform.h
index 92f775551..413c2224c 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -76,6 +76,9 @@
 # define UNUSED_PARAM_RESULT
 #endif
 
+/* used by unit test machinery to run registration functions */
+#define INIT_LAST __attribute__ ((constructor(2000)))
+
 /* -fwhole-program makes all symbols local. The attribute externally_visible
  * forces a symbol global.  */
 #if __GNUC_PREREQ(4,1)