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On Wed, 2011-11-16 at 08:30 -0500, Willie Wong wrote: |
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> On Wed, Nov 16, 2011 at 03:29:27PM +0700, Pandu Poluan wrote: |
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> > > what does "graphite" add ? |
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> > > |
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> > |
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> > It makes gcc-4.5.3 use a newer method to detect parallelism, thus |
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> > (potentially) makes programs compiled by gcc to have better multithreaded |
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> > performance. |
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> |
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> Now, why can't the USE descriptions be like the kernel option |
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> descriptions and have something like what Pandu wrote included? |
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|
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$ equery u gcc |
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[ Legend : U - final flag setting for installation] |
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[ : I - package is installed with flag ] |
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[ Colors : set, unset ] |
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* Found these USE flags for sys-devel/gcc-4.5.3-r1: |
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U I |
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- - bootstrap : !!internal use only!! DO NOT SET THIS FLAG YOURSELF!, |
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used |
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during original system bootstrapping [make stage2] |
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- - build : !!internal use only!! DO NOT SET THIS FLAG YOURSELF!, |
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used for |
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creating build images and the first half of |
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bootstrapping |
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[make stage1] |
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+ + cxx : Builds support for C++ (bindings, extra libraries, code |
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generation, ...) |
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- - doc : Adds extra documentation (API, Javadoc, etc). It is |
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recommended to enable per package instead of globally |
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- - fortran : Adds support for fortran (formerly f77) |
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- - gcj : Enable building with gcj (The GNU Compiler for the |
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Javatm |
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Programming Language) |
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- - graphite : Add support for the framework for loop optimizations |
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based on |
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a polyhedral intermediate representation |
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- - gtk : Adds support for x11-libs/gtk+ (The GIMP Toolkit) |
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+ + lto : Add support for link-time optimizations (unsupported, |
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use at |
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your own risk). |
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- - mudflap : Add support for mudflap, a pointer use checking library |
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- - multislot : Allow for SLOTs to include minor version (3.3.4 instead |
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of |
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just 3.3) |
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- - nls : Adds Native Language Support (using gettext - GNU |
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locale |
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utilities) |
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- - nocxx : Old flag -- USE=cxx from now on |
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- - nopie : Disable PIE support (NOT FOR GENERAL USE) |
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- - nossp : Disable SSP support (NOT FOR GENERAL USE) |
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+ + nptl : Enable support for Native POSIX Threads Library, the |
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new |
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threading module (requires linux-2.6 or better usually) |
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- - objc : Build support for the Objective C code language |
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- - objc++ : Build support for the Objective C++ language |
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- - objc-gc : Build support for the Objective C code language Garbage |
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Collector |
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- - openmp : Build support for the OpenMP (support parallel |
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computing), |
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requires >=sys-devel/gcc-4.2 built with USE="openmp" |
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- - test : Workaround to pull in packages needed to run with |
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FEATURES=test. Portage-2.1.2 handles this internally, |
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so don't |
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set it in make.conf/package.use anymore |
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- - vanilla : Do not add extra patches which change default |
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behaviour; DO |
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NOT USE THIS ON A GLOBAL SCALE as the severity of the |
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meaning |
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changes drastically |
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