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Diffstat (limited to 'Documentation/kbuild/makefiles.txt')
| -rw-r--r-- | Documentation/kbuild/makefiles.txt | 24 |
1 files changed, 6 insertions, 18 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index 7b6a2b2bdc98..bf28c47bfd72 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -537,21 +537,6 @@ more details, with real examples. The third parameter may be a text as in this example, but it may also be an expanded variable or a macro. - cc-fullversion - cc-fullversion is useful when the exact version of gcc is needed. - One typical use-case is when a specific GCC version is broken. - cc-fullversion points out a more specific version than cc-version does. - - Example: - #arch/powerpc/Makefile - $(Q)if test "$(cc-fullversion)" = "040200" ; then \ - echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ - false ; \ - fi - - In this example for a specific GCC version the build will error out - explaining to the user why it stops. - cc-cross-prefix cc-cross-prefix is used to check if there exists a $(CC) in path with one of the listed prefixes. The first prefix where there exist a @@ -1311,9 +1296,12 @@ See subsequent chapter for the syntax of the Kbuild file. --- 7.4 mandatory-y - mandatory-y is essentially used by include/uapi/asm-generic/Kbuild.asm - to define the minimum set of headers that must be exported in - include/asm. + mandatory-y is essentially used by include/(uapi/)asm-generic/Kbuild.asm + to define the minimum set of ASM headers that all architectures must have. + + This works like optional generic-y. If a mandatory header is missing + in arch/$(ARCH)/include/(uapi/)/asm, Kbuild will automatically generate + a wrapper of the asm-generic one. The convention is to list one subdir per line and preferably in alphabetic order. |