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author | Eli Zaretskii <eliz@gnu.org> | 2023-06-24 10:23:07 +0300 |
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committer | Eli Zaretskii <eliz@gnu.org> | 2023-06-24 10:23:07 +0300 |
commit | 679e9d7c56e2296e3a218290d941e28002bf7722 (patch) | |
tree | 7ce0f554446f23711759fd21fdd5f14fc59fb0c9 /etc | |
parent | fdc1a12ed1a2ceaebf21ec68752e85dd4527ceab (diff) | |
download | emacs-679e9d7c56e2296e3a218290d941e28002bf7722.tar.gz |
; Mention MinGW64 GCC 13.1 problems in PROBLEMS
* etc/PROBLEMS: Mention the problems building with MinGW64 GCC
13.1. (Bug#63365)
Diffstat (limited to 'etc')
-rw-r--r-- | etc/PROBLEMS | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/etc/PROBLEMS b/etc/PROBLEMS index e5baa8ee18a..80b3b9945c4 100644 --- a/etc/PROBLEMS +++ b/etc/PROBLEMS @@ -3422,6 +3422,39 @@ See https://lists.gnu.org/r/emacs-devel/2010-07/msg01266.html +*** Building the MS-Windows port with native compilation fails + +This is known to happen when using MinGW64 GCC 13.1, and seems to +affect byte-compilation: the built Emacs crashes while byte-compiling +some Lisp files. (This doesn't happen when building a release +tarball, because all the Lisp files are already byte-compiled there, +but then Emacs could crash later when you use it to byte-compile your +or third-party Lisp packages.) + +The reason seems to be specific to MS-Windows or the MinGW64 port of +GCC 13.1, and is somehow related to optimizations in this GCC version. +There are several known workarounds: + + . Use non-default optimization flags. For example, configuring the + build like this will avoid the problem: + + CFLAGS='-O1 -gdwarf-4 -g3' ./configure ... + + (replace the ellipsis "..." with the rest of 'configure' options + and arguments). + + . Prevent GCC from performing a specific optimization: + + CFLAGS='-O2 -gdwarf-4 -g3 -fno-optimize-sibling-calls' ./configure ... + + This is actually a variant of the previous workaround, except that + it allows you to have almost the full set of optimizations used by + -O2. + + . Downgrade to GCC 12.x. + + . Build Emacs without native compilation. + *** Building the native MS-Windows port fails due to unresolved externals The linker error messages look like this: |