With latest musl the build is failing when using clang-17+ because it treats implicit function declarations as errors. Musl has removed the declaration in string.h [1]

It fails with following errors

../attr-2.5.1/tools/attr.c:72:13: error: call to undeclared function 'basename'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   72 |         progname = basename(argv[0]);
      |                    ^
../attr-2.5.1/tools/attr.c:72:11: error: incompatible integer to pointer conversion assigning to 'char *' from 'int' [-Wint-conversion]
   72 |         progname = basename(argv[0]);
      |                  ^ ~~~~~~~~~~~~~~~~~
2 errors generated.
make[1]: * [Makefile:980: tools/attr.o] Error 1

[1] https://git.musl-libc.org/cgit/musl/commit/?id=725e17ed6dff4d0cd22487bb64470881e86a92e7