README: add doc for how to supply user specific compiler flags to Kbuild

Probably not all users are aware of this possibility, thus add a pointer to the README. Also add a useful example. Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

README: add doc for how to supply user specific compiler flags to Kbuild
Probably not all users are aware of this possibility, thus add a pointer to the README. Also add a useful example. Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Daniel Schwierzeck · Tom Rini
1 parent bf8f4c4400
Showing 1 changed file with 5 additions and 0 deletions Side-by-side Diff
README
@@ -3719,6 +3719,11 @@
 Note that the command line "O=" setting overrides the KBUILD_OUTPUT environment
 variable.
  
+User specific CPPFLAGS, AFLAGS and CFLAGS can be passed to the compiler by
+setting the according environment variables KCPPFLAGS, KAFLAGS and KCFLAGS.
+For example to treat all compiler warnings as errors:
+
+	make KCFLAGS=-Werror
  
 Please be aware that the Makefiles assume you are using GNU make, so
 for instance on NetBSD you might need to use "gmake" instead of
...	...	@@ -3719,6 +3719,11 @@
3719	3719	Note that the command line "O=" setting overrides the KBUILD_OUTPUT environment
3720	3720	variable.
3721	3721
	3722	+User specific CPPFLAGS, AFLAGS and CFLAGS can be passed to the compiler by
	3723	+setting the according environment variables KCPPFLAGS, KAFLAGS and KCFLAGS.
	3724	+For example to treat all compiler warnings as errors:
	3725	+
	3726	+ make KCFLAGS=-Werror
3722	3727
3723	3728	Please be aware that the Makefiles assume you are using GNU make, so
3724	3729	for instance on NetBSD you might need to use "gmake" instead of