PATH_MAX is not defined unless we pull in <limits.h> on musl. --- astyle/src/astyle_main.cpp.old 2018-01-11 17:18:19.000000000 +0000 +++ astyle/src/astyle_main.cpp 2020-07-19 20:23:56.774222078 +0000 @@ -37,6 +37,7 @@ #include <algorithm> #include <cerrno> +#include <climits> #include <clocale> // needed by some compilers #include <cstdlib> #include <fstream>