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-rw-r--r--Documentation/kbuild/makefiles.txt7
1 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index b7d6abb501a..50f4eddf899 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -390,7 +390,7 @@ more details, with real examples.
The kernel may be built with several different versions of
$(CC), each supporting a unique set of features and options.
kbuild provide basic support to check for valid options for $(CC).
- $(CC) is useally the gcc compiler, but other alternatives are
+ $(CC) is usually the gcc compiler, but other alternatives are
available.
as-option
@@ -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.