Crafter.Build/tests/MingwSysroot/fixture/failing.cpp

// SPDX-License-Identifier: LGPL-3.0-only
// SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®

// Stops in a header of the stand-in mingw-w64, so that the error clang
// reports is located in one.
#include <crafter_probe_error.h>
fix(mingw): view only a prefix that holds a Linux system The first fix showed clang every mingw prefix through a view of its mingw-w64 parts. That broke a prefix that holds mingw-w64 alone, where Windows libraries installed with --prefix land in include/ and lib/: with CRAFTER_MINGW_DIR=/opt/mingw, <SDL2/SDL.h> and -lSDL2 were no longer found. Such a prefix is clang's sysroot whole again. Only a prefix that also holds a Linux system gets the view (Toolchain::mingwPrefixIsSystem): the host's /usr inside the Flatpak, whatever its include/ holds, and a prefix whose include/ has a C library's features.h, which every glibc and musl header includes and mingw-w64 has no use for, as CRAFTER_MINGW_DIR=/usr has. MakeMingwSysroot makes the view in the cache, or in $XDG_RUNTIME_DIR/crafter.build when the cache's filesystem takes no symbolic links (vfat, exFAT, CIFS without unix extensions): the XDG spec promises them there, and nothing else in the cache needs them. Its path is absolute, because CMake runs the compiler from directories of its own and a relative cache did not resolve from there. The prefix is resolved once, absolute and lexically normal, so /opt/mingw/ and /opt/mingw are one prefix and not two builds. clang names a header by the path it found it at, so every diagnostic from a viewed mingw-w64 header named a hashed cache directory. RunBuildCommand now writes paths into the view as paths into the prefix, as BuildStdPcm did for its manifest messages already. Also from the review of PR #44: SysrootCompileFlags builds a mingw command, which can make a view, so it redirects the cache like the other tests; the manifest filter's comment names what it still keeps out; the C path asks MingwSysroot() once. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> 2026-10-31 22:58:30 +01:00			`// SPDX-License-Identifier: LGPL-3.0-only`
			`// SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®`

			`// Stops in a header of the stand-in mingw-w64, so that the error clang`
			`// reports is located in one.`
			`#include <crafter_probe_error.h>`