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| author |   Matthias Maier <tamiko@43-1.org> | 2018-06-23 12:50:46 -0500 |
|---|---|---|
| committer | Matthias Maier <tamiko@43-1.org> | 2018-06-23 13:50:52 -0500 |
| commit | ed081df12a0fbb5ee39bb148e692a625bd8a4317 (patch) | |
| tree | 8be1febd6def051b8baa2d42de3a880d87ee041e | |
| parent | New item: Python 3.6 to become the default target (diff) | |
| download | gentoo-ed081df12a0fbb5ee39bb148e692a625bd8a4317.tar.gz gentoo-ed081df12a0fbb5ee39bb148e692a625bd8a4317.tar.bz2 gentoo-ed081df12a0fbb5ee39bb148e692a625bd8a4317.zip | |
2018-06-23-mpfr-4-update: Add news item
| -rw-r--r-- | 2018-06-23-mpfr-4-update/2018-06-23-mpfr-4-update.en.txt | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/2018-06-23-mpfr-4-update/2018-06-23-mpfr-4-update.en.txt b/2018-06-23-mpfr-4-update/2018-06-23-mpfr-4-update.en.txt new file mode 100644 index 000000000000..a93df9a5a11f --- /dev/null +++ b/2018-06-23-mpfr-4-update/2018-06-23-mpfr-4-update.en.txt @@ -0,0 +1,29 @@ +Title: dev-libs/mpfr 4 upgrade +Author: Matthias Maier <tamiko@gentoo.org> +Posted: 2018-06-23 +Revision: 1 +News-Item-Format: 2.0 +Display-If-Installed: <dev-libs/mpfr-4 + +dev-libs/mpfr-4 introduced an ABI and soname change that has the potential +of breaking the compiler toolchain. In order to minimize potential problems +it is strongly recommended to rebuild mpc and gcc immediately after mpfr. +You can do this by running + + emerge --ask --oneshot ">=dev-libs/mpfr-4" dev-libs/mpc sys-devel/gcc + +Detailed explanation: + +libmpfr.so is used by libmpc.so (provided by dev-libs/mpc), as well as by +internal executables (e.g. cc1, cc1plus) of sys-devel/gcc. Appropriate +subslots in mpfr and slot-operators in dependencies in mpc and gcc will +cause a rebuild of mpc and gcc after an upgrade of mpfr. + +However, after mpfr-4 is installed and mpc rebuiltd, but *before* gcc is +rebuilt, gcc will be in an inconsistent state wherein symbols from +incorrect library versions of mpfr might get used. This can result in +segfaults and internal compiler errors. It is therefore important to +rebuild gcc immmediately after mpc. + +A detailed update guide with troubleshoot section can be found on the wiki: +https://wiki.gentoo.org/wiki/Mpfr4-update-guide |