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| author | Michael Matz <matz@suse.de> | 2006-05-09 15:40:12 +0000 |
|---|---|---|
| committer | Michael Matz <matz@gcc.gnu.org> | 2006-05-09 15:40:12 +0000 |
| commit | fa959ce486f4e61e26a48d509e2f9980d35eca1b (patch) | |
| tree | edfdcf7946b106c46521aab6bfcb76f775a8a190 /gcc/doc | |
| parent | f9c3744b7f05d9e60ff8776111ad9049b55d863a (diff) | |
| download | gcc-fa959ce486f4e61e26a48d509e2f9980d35eca1b.zip gcc-fa959ce486f4e61e26a48d509e2f9980d35eca1b.tar.gz gcc-fa959ce486f4e61e26a48d509e2f9980d35eca1b.tar.bz2 | |
config.host (<i[34567]86-*-*, [...]): Set host_extra_gcc_objs and host_xmake_file.
* config.host (<i[34567]86-*-*, x86_64-*-*>): Set
host_extra_gcc_objs and host_xmake_file.
(<*-*-linux*>): Don't overwrite host_xmake_file.
* gcc.c (static_spec_functions): Add EXTRA_SPEC_FUNCTIONS.
* config/i386/i386.h (EXTRA_SPEC_FUNCTIONS): Define.
(host_detect_local_cpu): Declare.
(CC1_CPU_SPEC): Add -march=native and -mtune=native cases.
* config/i386/i386.c (override_options): Handle -mtune=native
as -mtune=generic.
* config/i386/x-i386: New file.
* config/i386/driver-i386.c: New file.
* doc/invoke.texi (<i386 and x86-64 Options>): Describe
cpu-type "native".
From-SVN: r113655
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 71c6925..bf1fe7c 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -9176,6 +9176,13 @@ indicates the instruction set the compiler can use, and there is no generic instruction set applicable to all processors. In contrast, @option{-mtune} indicates the processor (or, in this case, collection of processors) for which the code is optimized. +@item native +This selects the CPU to tune for at compilation time by determining +the processor type of the compiling machine. Using @option{-mtune=native} +will produce code optimized for the local machine under the constraints +of the selected instruction set. Using @option{-march=native} will +enable all instruction subsets supported by the local machine (hence +the result might not run on different machines). @item i386 Original Intel's i386 CPU@. @item i486 |