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-rw-r--r--Documentation/kbuild/makefiles.txt14
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.