to prerequisites are referenced with $(src) (because they are not
generated files).
+ $(kecho)
+ echoing information to user in a rule is often a good practice
+ but when execution "make -s" one does not expect to see any output
+ except for warnings/errors.
+ To support this kbuild define $(kecho) which will echo out the
+ text following $(kecho) to stdout except if "make -s" is used.
+
+ Example:
+ #arch/blackfin/boot/Makefile
+ $(obj)/vmImage: $(obj)/vmlinux.gz
+ $(call if_changed,uimage)
+ @$(kecho) 'Kernel: $@ is ready'
+
+
--- 3.11 $(CC) support functions
The kernel may be built with several different versions of
to the user why it stops.
cc-cross-prefix
- cc-cross-prefix is used to check if there exist a $(CC) in path with
+ cc-cross-prefix is used to check if there exists a $(CC) in path with
one of the listed prefixes. The first prefix where there exist a
prefix$(CC) in the PATH is returned - and if no prefix$(CC) is found
then nothing is returned.
Additional prefixes are separated by a single space in the
call of cc-cross-prefix.
- This functionality is usefull for architecture Makefile that try
- to set CROSS_COMPILE to well know values but may have several
+ This functionality is useful for architecture Makefiles that try
+ to set CROSS_COMPILE to well-known values but may have several
values to select between.
- It is recommended only to try to set CROSS_COMPILE is it is a cross
- build (host arch is different from target arch). And is CROSS_COMPILE
+ It is recommended only to try to set CROSS_COMPILE if it is a cross
+ build (host arch is different from target arch). And if CROSS_COMPILE
is already set then leave it with the old value.
Example: