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Diffstat (limited to 'Documentation/kbuild/makefiles.txt')
-rw-r--r-- | Documentation/kbuild/makefiles.txt | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index 14ef3868a328..0706699c9da9 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt | |||
@@ -407,6 +407,20 @@ more details, with real examples. | |||
407 | The second argument is optional, and if supplied will be used | 407 | The second argument is optional, and if supplied will be used |
408 | if first argument is not supported. | 408 | if first argument is not supported. |
409 | 409 | ||
410 | ld-option | ||
411 | ld-option is used to check if $(CC) when used to link object files | ||
412 | supports the given option. An optional second option may be | ||
413 | specified if first option are not supported. | ||
414 | |||
415 | Example: | ||
416 | #arch/i386/kernel/Makefile | ||
417 | vsyscall-flags += $(call ld-option, -Wl$(comma)--hash-style=sysv) | ||
418 | |||
419 | In the above example vsyscall-flags will be assigned the option | ||
420 | -Wl$(comma)--hash-style=sysv if it is supported by $(CC). | ||
421 | The second argument is optional, and if supplied will be used | ||
422 | if first argument is not supported. | ||
423 | |||
410 | cc-option | 424 | cc-option |
411 | cc-option is used to check if $(CC) support a given option, and not | 425 | cc-option is used to check if $(CC) support a given option, and not |
412 | supported to use an optional second option. | 426 | supported to use an optional second option. |