WASI's values for SEEK_CUR, SEEK_SET, and SEEK_END differ from musl's
values, so fix musl code that bakes in knowledge of these values.
This fixes src/functional/memstream.c.
POSIX requires fcntl.h to define the SEEK_* macros, so this satisfies
that requirement. Also, this allows <stdio.h> to avoid including as much
unnecessary content.
This fixes one issue with src/api/fcntl.c.
These functions aren't specific to the underlying system call interface,
so they don't need to be in the "bottom half".
This also fixes src/functional/inet_pton.c and
src/regression/inet_pton-empty-last-field.c in musl's libc-test.
This was commented out earlier when timezone handling was more in flux,
but it's ok to minimally support this now.
This fixes src/functional/strftime.c in libc-test.
Initialize `environ` even if there are no environment variables, so that
it alwasy points to a NULL-terminated array even if that array just
contains the NULL. This fixes src/functional/env.c.
Remove build rules for $(SYSROOT) and $(SYSROOT_INC). The latter
becomes `include_dirs`. The former is not needed, instead just add
startup_files to the finish rule.
`lseek(x, 0, SEEK_CUR)` has no effect other than to return the current
file offset. The patch here uses a macro with `__builtin_constant_p` to
recognize this case and rewrite it to a library call that uses `fd_tell`
rather than `fd_seek`, so that programs that don't need actual seeking
don't end up importing `fd_seek`.
This is also the first usage of `__wasi_fd_tell` in WASI libc, so this
adds it to undefined-symbols.txt.
Some systems, such as Darwin, only declare getentropy in <sys/random.h>,
so declare it there on WASI too for compatibility.
Also, give getentropy the underscore-prefix/weak-symbol treatment, as
it's not a standard-reserved identifier.
Some of these fields are only needed for threads, some are not needed at
all. Removing them helps prevent code from accidentally using them, such
as when we merge in new musl versions.
Previously, FD_SET and friends were missing their actual definitions.
This provides definitions, entirely within the system headers in a
way that doesn't need instantiated out-of-line definitions.
Most of the changes are in threads, TLS, dynamic linking, and other
features wasi doesn't yet use, but there are some bug fixes in code
wasi does use.
atanl.c - local changes no longer needed as they've now landed upstream.
include/alltypes.h.in - Upstream now makes FILE a complete type in
pre-C11 mode. For WASI, this level of pre-C11 strictness isn't as
important, and having multiple incompatible definitions of _IO_FILE
that are kept separate only by clever use of translation unit
boundaries can confuse some tools, so stick with the incomplete type.
