Compilation fails on Windows with GNU toolchain

On Windows, with the MSVC toolchain, no issue. With the GNU toolchain, I get an error. Does it require a separate installation of Mingw that includes gcc? So, more specifically * `rustup default stable-x86_64-pc-windows-msvc` works * `rustup default stable-x86_64-pc-windows-gnu` gives the error below ``` Microsoft Windows [Version 10.0.19045.5487] (c) Microsoft Corporation. All rights reserved. D:\projects\rust\_clones\stacker>cargo build Compiling cfg-if v1.0.0 Compiling psm v0.1.25 (D:\projects\rust\_clones\stacker\psm) Compiling stacker v0.1.19 (D:\projects\rust\_clones\stacker) Compiling windows_x86_64_gnu v0.52.6 Compiling libc v0.2.171 Compiling windows-targets v0.52.6 Compiling windows-sys v0.59.0 warning: stacker@0.1.19: Compiler family detection failed due to error: ToolNotFound: failed to find tool "gcc.exe": program not found (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help) error: failed to run custom build command for `stacker v0.1.19 (D:\projects\rust\_clones\stacker)` Caused by: process didn't exit successfully: `D:\projects\rust\_clones\stacker\target\debug\build\stacker-9b86e9bdd73208ee\build-script-build` (exit code: 1) --- stdout OUT_DIR = Some(D:\projects\rust\_clones\stacker\target\debug\build\stacker-f050fe67fe900bca\out) OPT_LEVEL = Some(0) TARGET = Some(x86_64-pc-windows-gnu) HOST = Some(x86_64-pc-windows-gnu) cargo:rerun-if-env-changed=CC_x86_64-pc-windows-gnu CC_x86_64-pc-windows-gnu = None cargo:rerun-if-env-changed=CC_x86_64_pc_windows_gnu CC_x86_64_pc_windows_gnu = None cargo:rerun-if-env-changed=HOST_CC HOST_CC = None cargo:rerun-if-env-changed=CC CC = None cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT cargo:warning=Compiler family detection failed due to error: ToolNotFound: failed to find tool "gcc.exe": program not found (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help) RUSTC_WRAPPER = None cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS CRATE_CC_NO_DEFAULTS = None DEBUG = Some(true) CARGO_CFG_TARGET_FEATURE = Some(cmpxchg16b,fxsr,sse,sse2,sse3) cargo:rerun-if-env-changed=CFLAGS CFLAGS = None cargo:rerun-if-env-changed=HOST_CFLAGS HOST_CFLAGS = None cargo:rerun-if-env-changed=CFLAGS_x86_64_pc_windows_gnu CFLAGS_x86_64_pc_windows_gnu = None cargo:rerun-if-env-changed=CFLAGS_x86_64-pc-windows-gnu CFLAGS_x86_64-pc-windows-gnu = None CARGO_ENCODED_RUSTFLAGS = Some() --- stderr error occurred in cc-rs: failed to find tool "gcc.exe": program not found (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help) warning: build failed, waiting for other jobs to finish... warning: psm@0.1.25: Compiler family detection failed due to error: ToolNotFound: failed to find tool "gcc.exe": program not found (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help) warning: psm@0.1.25: Compiler family detection failed due to error: ToolNotFound: failed to find tool "gcc.exe": program not found (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help) error: failed to run custom build command for `psm v0.1.25 (D:\projects\rust\_clones\stacker\psm)` Caused by: process didn't exit successfully: `D:\projects\rust\_clones\stacker\target\debug\build\psm-fb2b73dd4fd8303e\build-script-build` (exit code: 1) --- stdout cargo:rustc-check-cfg=cfg(switchable_stack,asm,link_asm) OPT_LEVEL = Some(0) OUT_DIR = Some(D:\projects\rust\_clones\stacker\target\debug\build\psm-b519261e4261083d\out) TARGET = Some(x86_64-pc-windows-gnu) HOST = Some(x86_64-pc-windows-gnu) cargo:rerun-if-env-changed=CC_x86_64-pc-windows-gnu CC_x86_64-pc-windows-gnu = None cargo:rerun-if-env-changed=CC_x86_64_pc_windows_gnu CC_x86_64_pc_windows_gnu = None cargo:rerun-if-env-changed=HOST_CC HOST_CC = None cargo:rerun-if-env-changed=CC CC = None cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT cargo:warning=Compiler family detection failed due to error: ToolNotFound: failed to find tool "gcc.exe": program not found (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help) RUSTC_WRAPPER = None cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS CRATE_CC_NO_DEFAULTS = None DEBUG = Some(true) CARGO_CFG_TARGET_FEATURE = Some(cmpxchg16b,fxsr,sse,sse2,sse3) cargo:rerun-if-env-changed=CFLAGS CFLAGS = None cargo:rerun-if-env-changed=HOST_CFLAGS HOST_CFLAGS = None cargo:rerun-if-env-changed=CFLAGS_x86_64_pc_windows_gnu CFLAGS_x86_64_pc_windows_gnu = None cargo:rerun-if-env-changed=CFLAGS_x86_64-pc-windows-gnu CFLAGS_x86_64-pc-windows-gnu = None CARGO_ENCODED_RUSTFLAGS = Some() cargo:rustc-cfg=asm cargo:rustc-cfg=link_asm cargo:warning=Compiler family detection failed due to error: ToolNotFound: failed to find tool "gcc.exe": program not found (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help) --- stderr error occurred in cc-rs: failed to find tool "gcc.exe": program not found (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help) D:\projects\rust\_clones\stacker> ```