diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kbuild/kconfig-language.txt | 14 | ||||
| -rw-r--r-- | Documentation/kbuild/makefiles.txt | 22 |
2 files changed, 35 insertions, 1 deletions
diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt index fe8b0c4892c..616043a6da9 100644 --- a/Documentation/kbuild/kconfig-language.txt +++ b/Documentation/kbuild/kconfig-language.txt @@ -77,7 +77,12 @@ applicable everywhere (see syntax). Optionally, dependencies only for this default value can be added with "if". -- dependencies: "depends on"/"requires" <expr> +- type definition + default value: + "def_bool"/"def_tristate" <expr> ["if" <expr>] + This is a shorthand notation for a type definition plus a value. + Optionally dependencies for this default value can be added with "if". + +- dependencies: "depends on" <expr> This defines a dependency for this menu entry. If multiple dependencies are defined, they are connected with '&&'. Dependencies are applied to all other options within this menu entry (which also @@ -289,3 +294,10 @@ source: "source" <prompt> This reads the specified configuration file. This file is always parsed. + +mainmenu: + + "mainmenu" <prompt> + +This sets the config program's title bar if the config program chooses +to use it. diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index f099b814d38..6166e2d7da7 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -518,6 +518,28 @@ more details, with real examples. 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 exist 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$(CC) is found + then nothing is returned. + Additional prefixes are separated by a single space in the + call of cc-cross-prefix. + This functionality is usefull for architecture Makefile that try + to set CROSS_COMPILE to well know values but may have several + values to select between. + It is recommended only to try to set CROSS_COMPILE is it is a cross + build (host arch is different from target arch). And is CROSS_COMPILE + is already set then leave it with the old value. + + Example: + #arch/m68k/Makefile + ifneq ($(SUBARCH),$(ARCH)) + ifeq ($(CROSS_COMPILE),) + CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu-) + endif + endif + === 4 Host Program support Kbuild supports building executables on the host for use during the |