musl gcc cross build

• https://musl.cc
• https://github.com/richfelker/musl-cross-make/commits/master/
• https://git.zv.io/toolchains/musl-cross-make

Due https://musl.cc not updating binaries over 2 years, but upstream git updating, rebuild musl-cross-make ourself, depends on upstream hashes

Local build

• Clone upstream git

  $ git clone --depth=1 https://git.zv.io/toolchains/musl-cross-make musl-cross
  

• Copy config.mak.yourmodification to musl-cross/config.mak, config.mak reference
• cd musl-cross
• make -j$(nproc)
• make install
• The compiled binary at output path

The output path already portable copy to another system or bind mount to another container, etc.