The fstat,lstat,stat,mknod stubs used to build older (before v2.33)
glibc versions depend on the weak_hidden_alias macro. It was removed
from the glibc libc-symbols header, so patch it back in for the older
builds.
The scope of libc_nonshared.a was greatly changed in glibc 2.33 and
2.34, but only the change from 2.34 was reflected so far. Glibc 2.33
finally switched to versioned symbols for stat functions, meaning that
libc_nonshared.a no longer contains them since 2.33. Relevant files were
therefore reverted to 2.32 versions and renamed accordingly.
This commit also removes errno.c, which was probably added to
libc_nonshared.a based on a wrong assumption that glibc/include/errno.h
requires glibc/csu/errno.c. In reality errno.h should refer to
__libc_errno (not to be confused with the public __errno_location),
which should be imported from libc.so. The inclusion of errno.c resulted
in wrong compile options as well; this commit fixes them as well.
These are tripping on 32-bit x86 but are intended to prevent glibc
itself from being built with a bad configuration. Zig is only using this
file to create libc_nonshared.a, so it's not relevant.
This is the only place in all of glibc that this macro is referenced.
What is it doing? Only preventing fstatat.c from knowing the type
definition of `__time64_t`, apparently.
Fixes compilation of fstatat.c on 32-bit x86.
I could have just included the file from upstream glibc, but it was too
silly so I just inlined it. This patch could be dropped in a future
glibc update if desired. If omitted it will cause easily solvable
C compilation failures building glibc nonshared.
- `fcntl` was renamed to `fcntl64` in glibc 2.28 (see #9485)
- `res_{,n}{search,query,querydomain}` became "their own" symbols since
glibc 2.34: they were prefixed with `__` before.
This PR makes it possible to use `fcntl` with glibc 2.27 or older and
the `res_*` functions with glibc 2.33 or older.
These patches will become redundant with universal-headers and can be
dropped. But we have to do with what we have now.
The fstat,lstat,stat,mknod stubs used to build older (before v2.33)
glibc versions depend on the weak_hidden_alias macro. It was removed
from the glibc libc-symbols header, so patch it back in for the older
builds.
The scope of libc_nonshared.a was greatly changed in glibc 2.33 and
2.34, but only the change from 2.34 was reflected so far. Glibc 2.33
finally switched to versioned symbols for stat functions, meaning that
libc_nonshared.a no longer contains them since 2.33. Relevant files were
therefore reverted to 2.32 versions and renamed accordingly.
This commit also removes errno.c, which was probably added to
libc_nonshared.a based on a wrong assumption that glibc/include/errno.h
requires glibc/csu/errno.c. In reality errno.h should refer to
__libc_errno (not to be confused with the public __errno_location),
which should be imported from libc.so. The inclusion of errno.c resulted
in wrong compile options as well; this commit fixes them as well.
Fixes#16152
These are tripping on 32-bit x86 but are intended to prevent glibc
itself from being built with a bad configuration. Zig is only using this
file to create libc_nonshared.a, so it's not relevant.
This is the only place in all of glibc that this macro is referenced.
What is it doing? Only preventing fstatat.c from knowing the type
definition of `__time64_t`, apparently.
Fixes compilation of fstatat.c on 32-bit x86.
I could have just included the file from upstream glibc, but it was too
silly so I just inlined it. This patch could be dropped in a future
glibc update if desired. If omitted it will cause easily solvable
C compilation failures building glibc nonshared.
- `fcntl` was renamed to `fcntl64` in glibc 2.28 (see #9485)
- `res_{,n}{search,query,querydomain}` became "their own" symbols since
glibc 2.34: they were prefixed with `__` before.
This PR makes it possible to use `fcntl` with glibc 2.27 or older and
the `res_*` functions with glibc 2.33 or older.
These patches will become redundant with universal-headers and can be
dropped. But we have to do with what we have now.
- `fcntl` was renamed to `fcntl64` in glibc 2.28 (see #9485)
- `res_{,n}{search,query,querydomain}` became "their own" symbols since
glibc 2.34: they were prefixed with `__` before.
This PR makes it possible to use `fcntl` with glibc 2.27 or older and
the `res_*` functions with glibc 2.33 or older.
These patches will become redundant with universal-headers and can be
dropped. But we have to do with what we have now.
Closes#9485
also use the common naming convention for glibc versions ("2.33" rather
than "2-33").
I also verified that these files are exactly identical to the previous
files from before zig updated to glibc 2.34.
__libc_start_main() from glibc.2.33.so or older needs to have a __libc_csu_init function callback parameter.
glibc-2.34 on the other hand has a different __libc_start_main() that does not use it,
and the start.S file from glibc-2.34 no longer construct the init function and pass null when calling __libc_start_main.
So, When targetting an older glibc, use the start.s files as they were in glibc-2.33 and construct the __libc_csu_init function.
fixes#10386#10512
Upstream, some of the nonshared functions moved to be different for hurd
and for linux. Since our glibc is linux-only we update to use the
linux-specific files.
This fixes std lib tests for x86_64 when linking glibc.
This commit introduces tools/update_glibc.zig to update the start files
for next time.
Some notable changes in recent glibc:
* abi-note.S has been changed to abi-note.c but we resist the change to
keep it easier to compile the start files.
* elf-init.c has been deleted upstream. Further testing should be done
to verify that binaries against glibc omitting elf-init.c still run
properly on oldel glibc linux systems.
Closes#4926
This commit upgrades glibc shared library stub-creating code to use the
new abilists file which is generated by the new glibc-abi-tool project:
https://github.com/ziglang/glibc-abi-tool/
The abilists file is different in these ways:
* It additionally encodes whether a symbol is a function or an object,
and if it is an object, it additionally encodes the size in bytes.
* It additionally encodes migrations of symbols from one library to
another between glibc versions.
* It is binary data instead of ascii.
* It is one file instead of three.
* It is 165 KB instead of 200 KB.
This solves three bugs:
Fixes#7667Fixes#8714Fixes#8896
