acos.s fix: use the formula acos(x) = atan2(sqrt(1-x),sqrt(1+x))
[musl] / include / dlfcn.h
2011-06-27 Rich Felkerfurther fixup dlfcn.h
2011-06-27 Rich Felkermatch LSB/glibc constants for dynamic loader
2011-02-12 Rich Felkerinitial check-in, version 0.5.0