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| author | Andrew Stubbs <ams@codesourcery.com> | 2011-10-18 14:14:14 +0000 |
|---|---|---|
| committer | Andrew Stubbs <ams@gcc.gnu.org> | 2011-10-18 14:14:14 +0000 |
| commit | 33aa08b35b357f8a567b6d7c8c1a55162fe0604c (patch) | |
| tree | 8ecbf80cbd6e807c88fbc66f5ba482431661e5ea /gcc/doc | |
| parent | aa6e723726a1e0ab392e436112ba18d071f927af (diff) | |
| download | gcc-33aa08b35b357f8a567b6d7c8c1a55162fe0604c.zip gcc-33aa08b35b357f8a567b6d7c8c1a55162fe0604c.tar.gz gcc-33aa08b35b357f8a567b6d7c8c1a55162fe0604c.tar.bz2 | |
config.host (arm*-*-linux*): Add driver-arm.o and x-arm.
2011-10-18 Andrew Stubbs <ams@codesourcery.com>
gcc/
* config.host (arm*-*-linux*): Add driver-arm.o and x-arm.
* config/arm/arm.opt: Add 'native' processor_type and
arm_arch enum values.
* config/arm/arm.h (host_detect_local_cpu): New prototype.
(EXTRA_SPEC_FUNCTIONS): New define.
(MCPU_MTUNE_NATIVE_SPECS): New define.
(DRIVER_SELF_SPECS): New define.
* config/arm/driver-arm.c: New file.
* config/arm/x-arm: New file.
* doc/invoke.texi (ARM Options): Document -mcpu=native,
-mtune=native and -march=native.
From-SVN: r180139
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index ac50a31..4f55dbc 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -10397,10 +10397,16 @@ assembly code. Permissible names are: @samp{arm2}, @samp{arm250}, @samp{fa526}, @samp{fa626}, @samp{fa606te}, @samp{fa626te}, @samp{fmp626}, @samp{fa726te}. + @option{-mcpu=generic-@var{arch}} is also permissible, and is equivalent to @option{-march=@var{arch} -mtune=generic-@var{arch}}. See @option{-mtune} for more information. +@option{-mcpu=native} causes the compiler to auto-detect the CPU +of the build computer. At present, this feature is only supported on +Linux, and not all architectures are recognised. If the auto-detect is +unsuccessful the option has no effect. + @item -mtune=@var{name} @opindex mtune This option is very similar to the @option{-mcpu=} option, except that @@ -10419,6 +10425,11 @@ processors, balancing between optimizations that benefit some CPUs in the range, and avoiding performance pitfalls of other CPUs. The effects of this option may change in future GCC versions as CPU models come and go. +@option{-mtune=native} causes the compiler to auto-detect the CPU +of the build computer. At present, this feature is only supported on +Linux, and not all architectures are recognised. If the auto-detect is +unsuccessful the option has no effect. + @item -march=@var{name} @opindex march This specifies the name of the target ARM architecture. GCC uses this @@ -10432,6 +10443,11 @@ of the @option{-mcpu=} option. Permissible names are: @samp{armv2}, @samp{armv7}, @samp{armv7-a}, @samp{armv7-r}, @samp{armv7-m}, @samp{iwmmxt}, @samp{iwmmxt2}, @samp{ep9312}. +@option{-march=native} causes the compiler to auto-detect the architecture +of the build computer. At present, this feature is only supported on +Linux, and not all architectures are recognised. If the auto-detect is +unsuccessful the option has no effect. + @item -mfpu=@var{name} @itemx -mfpe=@var{number} @itemx -mfp=@var{number} |