diff options
Diffstat (limited to 'Documentation/kbuild/kbuild.rst')
| -rw-r--r-- | Documentation/kbuild/kbuild.rst | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/kbuild/kbuild.rst b/Documentation/kbuild/kbuild.rst index 9c8d1d046ea5..3388a10f2dcc 100644 --- a/Documentation/kbuild/kbuild.rst +++ b/Documentation/kbuild/kbuild.rst @@ -22,6 +22,11 @@ modules.builtin.modinfo This file contains modinfo from all modules that are built into the kernel. Unlike modinfo of a separate module, all fields are prefixed with module name. +modules.builtin.ranges +---------------------- +This file contains address offset ranges (per ELF section) for all modules +that are built into the kernel. Together with System.map, it can be used +to associate module names with symbols. Environment variables ===================== @@ -86,6 +91,17 @@ HOSTRUSTFLAGS ------------- Additional flags to be passed to $(HOSTRUSTC) when building host programs. +PROCMACROLDFLAGS +---------------- +Flags to be passed when linking Rust proc macros. Since proc macros are loaded +by rustc at build time, they must be linked in a way that is compatible with +the rustc toolchain being used. + +For instance, it can be useful when rustc uses a different C library than +the one the user wants to use for host programs. + +If unset, it defaults to the flags passed when linking host programs. + HOSTLDFLAGS ----------- Additional flags to be passed when linking host programs. @@ -129,10 +145,21 @@ KBUILD_OUTPUT ------------- Specify the output directory when building the kernel. +This variable can also be used to point to the kernel output directory when +building external modules against a pre-built kernel in a separate build +directory. Please note that this does NOT specify the output directory for the +external modules themselves. (Use KBUILD_EXTMOD_OUTPUT for that purpose.) + The output directory can also be specified using "O=...". Setting "O=..." takes precedence over KBUILD_OUTPUT. +KBUILD_EXTMOD_OUTPUT +-------------------- +Specify the output directory for external modules. + +Setting "MO=..." takes precedence over KBUILD_EXTMOD_OUTPUT. + KBUILD_EXTRA_WARN ----------------- Specify the extra build checks. The same value can be assigned by passing |