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

* Avoid mingw-w64 GCC linker compatibility issues(?) with lld

Author: eramongodb

.evergreen/generated_configs/legacy-config.yml

@@ -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:${PATH:-}" # mingw-w64 GCC
         cmd.exe /c .\\.evergreen\\scripts\\link-sample-program-mingw.cmd
   link sample program MSVC bson:
   - command: shell.exec
@@ -165,6 +166,7 @@ functions:
         set -o errexit
         # Build libmongoc with CMake and compile a program that links
         # dynamically to it, using variables from pkg-config.exe.
+        "PATH="/cygdrive/c/ProgramData/chocolatey/lib/winlibs/tools/mingw64/bin:${PATH:-}" # mingw-w64 GCC
         cmd.exe /c .\\.evergreen\\scripts\\link-sample-program-mingw-bson.cmd
   update codecov.io:
   - command: shell.exec

.evergreen/legacy_config_generator/evergreen_config_lib/functions.py

@@ -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:${PATH:-}" # mingw-w64 GCC
                     cmd.exe /c .\\.evergreen\\scripts\\link-sample-program-mingw.cmd
                     """,
                 )
@@ -185,6 +186,7 @@
                     r"""
                     # Build libmongoc with CMake and compile a program that links
                     # dynamically to it, using variables from pkg-config.exe.
+                    "PATH="/cygdrive/c/ProgramData/chocolatey/lib/winlibs/tools/mingw64/bin:${PATH:-}" # mingw-w64 GCC
                     cmd.exe /c .\\.evergreen\\scripts\\link-sample-program-mingw-bson.cmd
                     """,
                 )

.evergreen/scripts/compile-windows.sh

@@ -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

.evergreen/scripts/link-sample-program-mingw-bson.cmd

@@ -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
 

.evergreen/scripts/link-sample-program-mingw.cmd

@@ -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