build: Add MinGW-w64 32-bit (i686) cross-compilation support#2067

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JohnsterID wants to merge 16 commits intoTheSuperHackers:mainfrom

JohnsterID:mingw-w64-build

Commits on Jan 18, 2026

build(cmake): Add MinGW-w64 toolchain and base configuration (#2067)
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build(cmake): Add widl integration for COM interface generation (#2067)
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build(cmake): Add ReactOS ATL and PSEH compatibility layer (#2067)
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build(cmake): Add ReactOS COM support utilities (comsupp) (#2067)
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build(deps): Update external dependencies for MinGW-w64 support (#2067)
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build(cmake): Configure MinGW-specific compiler and linker settings (#2067)
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build(cmake): Add MinGW CMake presets for i686 (#2067)
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fix(precompiled): Add ATL compatibility to precompiled headers (#2067)
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fix(cmake): Fix CMake dependencies and library linking for MinGW (#2067)
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fix(core): Add MinGW-w64 compatibility fixes to Core libraries (#2067)
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fix(headers): Add missing forward declarations for MinGW (#2067)
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fix(linkage): Fix static/extern linkage mismatches for MinGW (#2067)
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fix(calling-convention): Standardize calling conventions and variadic macros (#2067)
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fix(compatibility): Add compiler guards and GCC inline assembly for StackDump (#2067)
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fix(casts): Add explicit void* casts for function pointers (#2067)
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fix(debug): Simplify unconditional DEBUG_ASSERTCRASH to DEBUG_CRASH (#2067)
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