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authorDaniel Schwierzeck <daniel.schwierzeck@gmail.com>2018-01-26 16:31:04 +0100
committerTom Rini <trini@konsulko.com>2018-02-04 22:55:34 -0500
commit215bb1c14749591d2ac486682fad68fffc1c6bdb (patch)
tree64c5df6f2ba1178ca5e641a625fd3b023fa0b147 /README
parentbf8f4c4400e3c45acf0773ce381b70f5625be724 (diff)
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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>
Diffstat (limited to 'README')
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diff --git a/README b/README
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--- a/README
+++ b/README
@@ -3719,6 +3719,11 @@ this behavior and build U-Boot to some external directory:
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