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* README: add 'Releasing' sectionv2.3.1Sergei Trofimovich2020-06-211-0/+6
| | | | Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* README: document c89/c99 wrapper presenceSergei Trofimovich2020-06-211-0/+3
| | | | Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* README: add examples of querying facts about toolchainsSergei Trofimovich2019-09-071-3/+12
| | | | Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* gcc-config: drop empty /etc/env.d/05gcc-${CTARGET} filesSergei Trofimovich2019-09-071-7/+0
| | | | | | | Thesse files are generated for cross-gcc only. Were empty since Aug 2018. Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* gcc-config: don't recreate unused '.NATIVE' symlink.Sergei Trofimovich2019-09-071-6/+0
| | | | | | As gcc-wrapper is gone nothing should use it anymore. Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* README: clarify status of /etc/env.d/gcc/.NATIVESergei Trofimovich2019-09-061-2/+7
| | | | Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* Convert binary wrapper to a symlink wrapper.v2.0Sergei Trofimovich2018-08-241-59/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before the change: /usr/bin/gcc and friends were a copy of /usr/$(libexecdir)/misc/gcc-config After the change: /usr/bin/gcc is a symlink to a real compiler binary. Examples: /usr/${CTARGET}/gcc-bin/${GCC_VER}/gcc (native) /usr/${CHOST}/${CTARGET}/gcc-bin/${GCC_VER}/gcc (cross) gcc-config is a binary wrapper that does (or did) a few things: - [removed in 2011] injects additional CFLAGS_${ABI} Removed in commit 7ac40f3eb8434961f70485247d883f5b3009dcf2 "Stop auto appending CFLAGS_<abi> from the env." - traverses PATH for real compiler binary and reexecutes it. - reads /etc/env.d/05gcc-${CTARGET} as a fallback if PATH is empty. Today binary wrapper does only PATH resolution and re-execution. This change has a few minor benefits: - PATH will not contain explicit /usr/${CHOST}/${CTARGET}/gcc-bin/${GCC_VER} entry. This will make PATH shorter for those who have mavy cross-compilers installed. - compiler switch will not require sourcing '. /etc/profile' as changes are applied as soon an symlink is switched. - ccache will see gcc binary changes directly and react accordingly. Previously in default configuration ccache cache depended on state of /usr/$(libexecdir)/misc/gcc-config See bug #640958 where ccache did not notice USE=-pie -> USE=pie switch. - Reasoning about PATH ordering is straightforward: all available binaries (as symlinks) are in /usr/bin. See bug #255695 where PATH ordering changed and bug #626606 where people get confused on what is in /usr/bin/gcc binary. Bug: https://bugs.gentoo.org/626606 Bug: https://bugs.gentoo.org/255695 Bug: https://bugs.gentoo.org/640958 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* README: document /etc/env.d/04gcc-${CTARGET}Sergei Trofimovich2018-08-241-2/+15
| | | | Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* README: fix typos s/Practially/Practically and s/tolchain/toolchain/Sergei Trofimovich2018-08-241-2/+2
| | | | | | Noticed by [Arfrever]. Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
* README: add basic description of how gcc-config worksSergei Trofimovich2018-08-241-0/+103
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>