Add cosmocc toolchain support

[waruqi]

build-once run-anywhere

https://github.com/jart/cosmopolitan

Roadmap

#4704

• download and use cosmocc toolchain automatically
• support projects
  • console
  • static library
• support platforms
  • windows/msys2
  • linux
  • macosx

Example projects

see https://github.com/xmake-io/xmake/tree/master/tests/projects/c/cosmocc

Console

add_rules("mode.debug", "mode.release")

add_requires("cosmocc")

target("test")
    set_kind("binary")
    add_files("src/*.c")
    set_toolchains("@cosmocc")

Static library

add_rules("mode.release", "mode.debug")

add_requires("cosmocc")
set_toolchains("@cosmocc")

target("foo")
    set_kind("static")
    add_files("src/foo.c")

target("demo")
    set_kind("binary")
    add_deps("foo")
    add_files("src/main.c")

Linux

ruki:console$ xmake 
checking for platform ... linux
checking for architecture ... x86_64
note: install or modify (m) these packages (pass -y to skip confirm)?
in xmake-repo:
  -> cosmocc 3.2.4 
please input: y (y/n/m)

  => install cosmocc 3.2.4 .. ok   
[ 25%]: cache compiling.release src/main.c
[ 50%]: linking.release test
[100%]: build ok, spent 1.548s
ruki:console$ xmake run
hello world

ruki:console$ xmake -v
[ 25%]: cache compiling.release src/main.c
/home/ruki/.xmake/packages/c/cosmocc/3.2.4/f3d565918c3c4585af8de6edefe141a3/bin/cosmocc -c -fvisibility=hidden -O3 -DNDEBUG -o build/.objs/test/linux/x86_64/release/src/main.c.o src/main.c
checking for flags (-MMD -MF) ... ok
checking for flags (-fdiagnostics-color=always) ... ok
checking for cosmoc++ ... /home/ruki/.xmake/packages/c/cosmocc/3.2.4/f3d565918c3c4585af8de6edefe141a3/bin/cosmoc++
checking for the linker (ld) ... cosmoc++
checking for /home/ruki/.xmake/packages/c/cosmocc/3.2.4/f3d565918c3c4585af8de6edefe141a3/bin/cosmoc++ ... ok
checking for flags (-fPIC) ... ok
[ 50%]: linking.release test
/home/ruki/.xmake/packages/c/cosmocc/3.2.4/f3d565918c3c4585af8de6edefe141a3/bin/cosmoc++ -o build/linux/x86_64/release/test build/.objs/test/linux/x86_64/release/src/main.c.o
[100%]: build ok, spent 1.652s

Windows/Msys2

We need to run cosmocc on Msys2, because cosmocc is a shell script, it need to run bash/sh.

wangrunqing@IIGS-A8825-D MINGW64 /d/projects/personal/xmake/tests/projects/c/cosmocc/console
$ xmake
checking for platform ... mingw
checking for architecture ... x86_64
checking for mingw directory ... C:/msys64/mingw64
note: install or modify (m) these packages (pass -y to skip confirm)?
in xmake-repo:
  -> cosmocc 3.2.4
please input: y (y/n/m)

  => download https://github.com/xmake-mirror/cosmopolitan/releases/download/3.2.4/cosmocc-3.2.4.zip .. ok
  => install cosmocc 3.2.4 .. ok
[ 25%]: cache compiling.release src\main.c
[ 50%]: linking.release test.exe
[100%]: build ok, spent 9.453s

wangrunqing@IIGS-A8825-D MINGW64 /d/projects/personal/xmake/tests/projects/c/cosmocc/console
$ xmake run
hello world

MacOS

ruki:static_library ruki$ xmake
checking for platform ... macosx
checking for architecture ... x86_64
checking for Xcode directory ... /Applications/Xcode.app
checking for Codesign Identity of Xcode ... Apple Development: waruqi@gmail.com (T3NA4MRVPU)
checking for SDK version of Xcode for macosx (x86_64) ... 14.0
checking for Minimal target version of Xcode for macosx (x86_64) ... 14.0
[ 25%]: cache compiling.release src/foo.c
[ 25%]: cache compiling.release src/main.c
[ 50%]: archiving.release libfoo.a
[ 75%]: linking.release demo
[100%]: build ok, spent 3.099s
ruki:static_library ruki$ xmake run
add(1, 2) = 3

[waruqi]

I have added cosmocc package for windows. xmake-io/xmake-repo#3248

But we need to install sh/bash and update xmake/core to dev version.