Almost all of it. Musl AFAIK strongly sticks to the standard. It is one of the biggest things holding back wider adoption. Similar to the dependence between th

Almost all of it. Musl AFAIK strongly sticks to the standard. It is one of the biggest things holding back wider adoption. Similar to the dependence between the linux kernel and GCC. Clang should work but linux also has the 'GNUisms' so deep there a big project called LLVMlinux to correct it.