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Merged
merged 2 commits into from
Nov 17, 2025
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Merged

Use UCRT-based mingw-w64 GCC toolchain on Windows #2171

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0d6ffe6
Use UCRT-based mingw-w64 GCC toolchain on Windows
eramongodb Nov 14, 2025
3678985
Avoid mingw-w64 GCC linker compatibility issues with lld (?)
eramongodb Nov 14, 2025
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2 changes: 2 additions & 0 deletions .evergreen/generated_configs/legacy-config.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -139,6 +139,7 @@ functions:
set -o errexit
# Build libmongoc with CMake and compile a program that links
# dynamically to it, using variables from pkg-config.exe.
"PATH="/cygdrive/c/ProgramData/chocolatey/lib/winlibs/tools/mingw64/bin:${PATH:-}" # mingw-w64 GCC
cmd.exe /c .\\.evergreen\\scripts\\link-sample-program-mingw.cmd
link sample program MSVC bson:
- command: shell.exec
Expand All @@ -165,6 +166,7 @@ functions:
set -o errexit
# Build libmongoc with CMake and compile a program that links
# dynamically to it, using variables from pkg-config.exe.
"PATH="/cygdrive/c/ProgramData/chocolatey/lib/winlibs/tools/mingw64/bin:${PATH:-}" # mingw-w64 GCC
cmd.exe /c .\\.evergreen\\scripts\\link-sample-program-mingw-bson.cmd
update codecov.io:
- command: shell.exec
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2 changes: 2 additions & 0 deletions .evergreen/legacy_config_generator/evergreen_config_lib/functions.py
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Expand Up @@ -157,6 +157,7 @@
r"""
# Build libmongoc with CMake and compile a program that links
# dynamically to it, using variables from pkg-config.exe.
"PATH="/cygdrive/c/ProgramData/chocolatey/lib/winlibs/tools/mingw64/bin:${PATH:-}" # mingw-w64 GCC
cmd.exe /c .\\.evergreen\\scripts\\link-sample-program-mingw.cmd
""",
)
Expand Down Expand Up @@ -185,6 +186,7 @@
r"""
# Build libmongoc with CMake and compile a program that links
# dynamically to it, using variables from pkg-config.exe.
"PATH="/cygdrive/c/ProgramData/chocolatey/lib/winlibs/tools/mingw64/bin:${PATH:-}" # mingw-w64 GCC
cmd.exe /c .\\.evergreen\\scripts\\link-sample-program-mingw-bson.cmd
""",
)
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16 changes: 7 additions & 9 deletions .evergreen/scripts/compile-windows.sh
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Expand Up @@ -84,21 +84,19 @@ build_dir="cmake-build"
find_ccache_and_export_vars "$(pwd)" || true

if [[ "${CC}" =~ 'gcc' ]]; then
PATH="/cygdrive/c/ProgramData/chocolatey/lib/winlibs/tools/mingw64/bin:${PATH:-}" # mingw-w64 GCC

export CMAKE_GENERATOR="Ninja"

# MinGW has trouble compiling src/cpp-check.cpp without some assistance.
configure_flags_append "-DCMAKE_CXX_STANDARD=11"

cmake \
-S . \
-B "${build_dir:?}" \
-G "Ninja" \
"${configure_flags[@]}" \
"${extra_configure_flags[@]}"
# mingw-w64 doesn't like lld (hangs indefinitely?).
configure_flags_append "-DMONGO_USE_LLD=OFF"

cmake "${configure_flags[@]}" "${extra_configure_flags[@]}" -B "${build_dir:?}"

cmake --build "${build_dir:?}"
cmake --build "${build_dir:?}" --target mongo_c_driver_tests
cmake --build "${build_dir:?}" --target mongo_c_driver_examples
cmake --build "${build_dir:?}" --target all mongo_c_driver_tests mongo_c_driver_examples
else
# MSBuild task-based parallelism (VS 2019 16.3 and newer).
export UseMultiToolTask=true
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2 changes: 1 addition & 1 deletion .evergreen/scripts/link-sample-program-mingw-bson.cmd
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Expand Up @@ -25,7 +25,7 @@ set version=1.31.0
cd %BUILD_DIR% || goto :error

rem Build libmongoc, with flags that the downstream R driver mongolite uses
uvx cmake -G "Ninja" DCMAKE_INSTALL_PREFIX=%INSTALL_DIR% -DCMAKE_C_FLAGS="-pedantic" -DCMAKE_PREFIX_PATH=%INSTALL_DIR%\lib\cmake -DENABLE_STATIC=ON .. || goto :error
uvx cmake -G "Ninja" -DMONGO_USE_LLD=OFF -DCMAKE_INSTALL_PREFIX=%INSTALL_DIR% -DCMAKE_C_FLAGS="-pedantic" -DCMAKE_PREFIX_PATH=%INSTALL_DIR%\lib\cmake -DENABLE_STATIC=ON .. || goto :error
uvx cmake --build . --parallel || goto :error
uvx cmake --build . --target install || goto :error

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2 changes: 1 addition & 1 deletion .evergreen/scripts/link-sample-program-mingw.cmd
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Expand Up @@ -25,7 +25,7 @@ set major=1
cd %BUILD_DIR% || goto :error

rem Build libmongoc, with flags that the downstream R driver mongolite uses
uvx cmake -G "Ninja" -DCMAKE_INSTALL_PREFIX=%INSTALL_DIR% -DCMAKE_C_FLAGS="-pedantic" -DCMAKE_PREFIX_PATH=%INSTALL_DIR%\lib\cmake %CMAKE_FLAGS% .. || goto :error
uvx cmake -G "Ninja" -DMONGO_USE_LLD=OFF -DCMAKE_INSTALL_PREFIX=%INSTALL_DIR% -DCMAKE_C_FLAGS="-pedantic" -DCMAKE_PREFIX_PATH=%INSTALL_DIR%\lib\cmake %CMAKE_FLAGS% .. || goto :error
uvx cmake --build . --parallel || goto :error
uvx cmake --build . --target install || goto :error

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