在 2026-10-8 14:25, Zhongteng Gui 写道:
As I've said in the original commit message, I did lots of searches before, and I think this is inherited from the very-old MSYS 1 together with MinGW (no -w64). Also, I doubt it can't even build some older GCC versions, not to say latest GCC 16/17. (The last proved version was GCC 6, see [1]).Most modern distributions (that can build GCC 16) as I've listed in the commit message usually use `sed` to replace `/mingw` with either `/usr` or their own prefixes. This is very hacky, and I think (and it'v proved to work in MSYS2 and conda-forge) that it's better to use --sysroot with no special prefixes.
For Cygwin the headers and libraries for Cygwin-to-native cross-compilers are located in (https://cygwin.com/pipermail/cygwin-apps/2012-March/029797.html) * /usr/i686-w64-mingw32/sys-root/mingw/{include,lib} (CRT) * /usr/i686-w64-mingw32/sys-root/w32api/{include,lib} (Platform) * /usr/x86_64-w64-mingw32/sys-root/mingw/{include,lib} (CRT) * /usr/x86_64-w64-mingw32/sys-root/w32api/{include,lib} (Platform)
From 92e86faf25ae7f5a95c1572fc93b2a2bc62a7670 Mon Sep 17 00:00:00 2001 From: Zhongteng Gui <[email protected]> Date: Thu, 8 Oct 2026 13:56:45 +0800 Subject: [PATCH v2] mingw: Remove outdated /mingw stuff from FLAGS_FOR_TARGET [PR126608] /mingw is only used by MSYS 1, which has been obsolete for a long time. The current users of target *-w64-mingw32 either uses their own prefix (MSYS2 and its derivatives, w64devkit, etc.), or use the default prefix /usr (Cross-compiling on linux, e.g. Conda-forge). More cleanups of /mingw may be done in future patches. ChangeLog: PR target/126608 * configure.ac (x86_64-*mingw* | *-w64-mingw*): Do not use /mingw symlink. Signed-off-by: Zhongteng Gui <[email protected]> --- configure.ac | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/configure.ac b/configure.ac index c5de225b0ac..c81755ebbb6 100644 --- a/configure.ac +++ b/configure.ac @@ -3948,9 +3948,7 @@ esaccase "$target" inx86_64-*mingw* | *-w64-mingw*) - # MinGW-w64 does not use newlib, nor does it use winsup. It may, - # however, use a symlink named 'mingw' in ${prefix} . - FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include' + # MinGW-w64 does not use newlib, nor does it use winsup. No special flags needed. ;; *-mingw*) # MinGW can't be handled as Cygwin above since it does not use newlib.
This checks `$target` so may affect Cygwin as well. -- Best regards, LIU Hao
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