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Separate headers from source files

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The short answer for why we need to do this is so we can consistently do
`#include "nix/..."`. Without this change, there are ways to still make
that work, but they are hacky, and they have downsides such as making it
harder to make sure headers from the wrong Nix library (e..g.
`libnixexpr` headers in `libnixutil`) aren't being used.

The C API alraedy used `nix_api_*`, so its headers are *not* put in
subdirectories accordingly.

Progress on #7876

We resisted doing this for a while because it would be annoying to not
have the header source file pairs close by / easy to change file
path/name from one to the other. But I am ameliorating that with
symlinks in the next commit.

(cherry picked from commit f3e1c47f47)
This commit is contained in:
John Ericson 2025-02-20 14:15:07 -05:00
parent c0b219cf46
commit 15658b259f
662 changed files with 2967 additions and 2906 deletions
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34
src/libstore/linux/fchmodat2-compat.hh
View file

@ -1,34 +0,0 @@
/*
* Determine the syscall number for `fchmodat2`.
*
* On most platforms this is 452. Exceptions can be found on
* a glibc git checkout via `rg --pcre2 'define __NR_fchmodat2 (?!452)'`.
*
* The problem is that glibc 2.39 and libseccomp 2.5.5 are needed to
* get the syscall number. However, a Nix built against nixpkgs 23.11
* (glibc 2.38) should still have the issue fixed without depending
* on the build environment.
*
* To achieve that, the macros below try to determine the platform and
* set the syscall number which is platform-specific, but
* in most cases 452.
*
* TODO: remove this when 23.11 is EOL and the entire (supported) ecosystem
* is on glibc 2.39.
*/
#if HAVE_SECCOMP
# if defined(__alpha__)
# define NIX_SYSCALL_FCHMODAT2 562
# elif defined(__x86_64__) && SIZE_MAX == 0xFFFFFFFF // x32
# define NIX_SYSCALL_FCHMODAT2 1073742276
# elif defined(__mips__) && defined(__mips64) && defined(_ABIN64) // mips64/n64
# define NIX_SYSCALL_FCHMODAT2 5452
# elif defined(__mips__) && defined(__mips64) && defined(_ABIN32) // mips64/n32
# define NIX_SYSCALL_FCHMODAT2 6452
# elif defined(__mips__) && defined(_ABIO32) // mips32
# define NIX_SYSCALL_FCHMODAT2 4452
# else
# define NIX_SYSCALL_FCHMODAT2 452
# endif
#endif // HAVE_SECCOMP