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Diffstat (limited to 'Documentation/kbuild/makefiles.txt')
| -rw-r--r-- | Documentation/kbuild/makefiles.txt | 43 |
1 files changed, 7 insertions, 36 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index e18daca65ccd..7003141a6d4f 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -45,10 +45,9 @@ This document describes the Linux kernel Makefiles. === 7 Kbuild syntax for exported headers --- 7.1 no-export-headers - --- 7.2 genhdr-y - --- 7.3 generic-y - --- 7.4 generated-y - --- 7.5 mandatory-y + --- 7.2 generic-y + --- 7.3 generated-y + --- 7.4 mandatory-y === 8 Kbuild Variables === 9 Makefile language @@ -487,22 +486,6 @@ more details, with real examples. respectively. Note: cc-option-yn uses KBUILD_CFLAGS for $(CC) options - cc-option-align - gcc versions >= 3.0 changed the type of options used to specify - alignment of functions, loops etc. $(cc-option-align), when used - as prefix to the align options, will select the right prefix: - gcc < 3.00 - cc-option-align = -malign - gcc >= 3.00 - cc-option-align = -falign - - Example: - KBUILD_CFLAGS += $(cc-option-align)-functions=4 - - In the above example, the option -falign-functions=4 is used for - gcc >= 3.00. For gcc < 3.00, -malign-functions=4 is used. - Note: cc-option-align uses KBUILD_CFLAGS for $(CC) options - cc-disable-warning cc-disable-warning checks if gcc supports a given warning and returns the commandline switch to disable it. This special function is needed, @@ -1277,18 +1260,7 @@ See subsequent chapter for the syntax of the Kbuild file. avoid exporting specific headers (e.g. kvm.h) on architectures that do not support it. It should be avoided as much as possible. - --- 7.2 genhdr-y - - genhdr-y specifies asm files to be generated. - - Example: - #arch/x86/include/uapi/asm/Kbuild - genhdr-y += unistd_32.h - genhdr-y += unistd_64.h - genhdr-y += unistd_x32.h - - - --- 7.3 generic-y + --- 7.2 generic-y If an architecture uses a verbatim copy of a header from include/asm-generic then this is listed in the file @@ -1315,11 +1287,10 @@ See subsequent chapter for the syntax of the Kbuild file. Example: termios.h #include <asm-generic/termios.h> - --- 7.4 generated-y + --- 7.3 generated-y If an architecture generates other header files alongside generic-y - wrappers, and not included in genhdr-y, then generated-y specifies - them. + wrappers, generated-y specifies them. This prevents them being treated as stale asm-generic wrappers and removed. @@ -1331,7 +1302,7 @@ See subsequent chapter for the syntax of the Kbuild file. --- 7.5 mandatory-y mandatory-y is essentially used by include/uapi/asm-generic/Kbuild.asm - to define the minimun set of headers that must be exported in + to define the minimum set of headers that must be exported in include/asm. The convention is to list one subdir per line and |