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| author | Andi Kleen <ak@suse.de> | 2006-09-26 10:52:30 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-26 10:52:30 +0200 |
| commit | e2414910f212c52d9d7c64c99a22863488ac5b48 (patch) | |
| tree | 5a7e55191ace4aa755c0684bcefc9cf1b124128c /Documentation/kbuild/makefiles.txt | |
| parent | [PATCH] Use BUILD_BUG_ON in apic.c build sanity checking (diff) | |
| download | linux-e2414910f212c52d9d7c64c99a22863488ac5b48.tar.xz linux-e2414910f212c52d9d7c64c99a22863488ac5b48.zip | |
[PATCH] x86: Detect CFI support in the assembler at runtime
... instead of using a CONFIG option. The config option still controls
if the resulting executable actually has unwind information.
This is useful to prevent compilation errors when users select
CONFIG_STACK_UNWIND on old binutils and also allows to use
CFI in the future for non kernel debugging applications.
Cc: jbeulich@novell.com
Cc: sam@ravnborg.org
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'Documentation/kbuild/makefiles.txt')
| -rw-r--r-- | Documentation/kbuild/makefiles.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index b7d6abb501a6..e2cbd59cf2d0 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -421,6 +421,11 @@ more details, with real examples. The second argument is optional, and if supplied will be used if first argument is not supported. + as-instr + as-instr checks if the assembler reports a specific instruction + and then outputs either option1 or option2 + C escapes are supported in the test instruction + cc-option cc-option is used to check if $(CC) supports a given option, and not supported to use an optional second option. |