Comment by AndyKelley

Is that building Go with Go? Or actual bootstrapping? Check this out...

Building Zig with Zig:

    andy@bark ~/s/zig (master)> time zig build
    
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    Executed in   11.67 secs    fish           external

Bootstrapping with only a C compiler dependency (not even make or shell!):

    andy@bark ~/s/zig (master)> time cc -o bootstrap bootstrap.c; and time ./bootstrap
    
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    Executed in   55.10 millis    fish           external
    
    gcc -o zig-wasm2c stage1/wasm2c.c -O2 -std=c99
    ./zig-wasm2c stage1/zig1.wasm zig1.c
    gcc -o zig1 zig1.c stage1/wasi.c -std=c99 -Os -lm
    ./zig1 lib build-exe -ofmt=c -lc -OReleaseSmall --name zig2 -femit-bin=zig2.c -target x86_64-linux --dep build_options --dep aro -Mroot=src/main.zig -Mbuild_options=config.zig -Maro=lib/compiler/aro/aro.zig
    ./zig1 lib build-obj -ofmt=c -OReleaseSmall --name compiler_rt -femit-bin=compiler_rt.c -target x86_64-linux -Mroot=lib/compiler_rt.zig
    gcc -o zig2 zig2.c compiler_rt.c -std=c99 -O2 -fno-stack-protector -Istage1 -Wl,-z,stack-size=0x10000000 -pthread
    
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    Executed in  305.06 secs    fish           external