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| author | Yuqian Yang <crupest@crupest.life> | 2025-02-08 21:29:31 +0800 |
|---|---|---|
| committer | Yuqian Yang <crupest@crupest.life> | 2025-02-09 20:48:22 +0800 |
| commit | 75c0fb3644a43da6299660799d6c7ebbbe6fc4b7 (patch) | |
| tree | 8aa14cd42d9b8d2a028836918e588c394bbc400a /absl/debugging/internal/vdso_support.h | |
| parent | 87ca79e3186203c8277d9ebc6292f0054cfa1c2f (diff) | |
| download | abseil-hurd.tar.gz abseil-hurd.tar.bz2 abseil-hurd.zip | |
Port abseil to GNU/Hurd.hurd
abseil has failed to build on GNU/Hurd for a long time. Now
let's make it work! :)
Note that `__GNU__` is the macro for detecting GNU/Hurd. And
`__MACH__` is also defined there besides on Apple platform.
They are both "mach" but with different implementation and
platform details. Here are the works,
* Mark platform features (not) supported by GNU/Hurd.
* Supports `mmap` and `write`.
* Not supports `vdso`. It's specific to Linux.
* Not supports `ELF_SYMBOLIZE` for now. GNU/Hurd uses ELF as
the binary format. But symbolizing in abseil relies on
reading object file path from `/proc/self/task/<pid>/maps`
(Linux specific) or `/proc/self/maps`. GNU/Hurd does have
the latter. However, due to its micro-kernel design, it's
currently unable to get the file path info there.
* Disable stack consumption measurement. The problem behind
it is that GNU/Hurd uses a very different way to implement
signal handling. Due to compiler behavior, it is
impossible to get a stable, valid and reliable statictic
data. In my test environment, it's 96 bytes (< 100) for
current codes.
* GNU/Hurd uses different errno and messages than Linux. So
related things are adjusted accordingly.
* Fix a misuse of `__MACH__`, which should actually be
`__APPLE__`.
* Fix a missing including of `signal.h` for using `SIGABRT`.
Otherwise compilation will fail with undefined symbol error
on GNU/Hurd.
Signed-off-by: Yuqian Yang <crupest@crupest.life>
Diffstat (limited to 'absl/debugging/internal/vdso_support.h')
| -rw-r--r-- | absl/debugging/internal/vdso_support.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/absl/debugging/internal/vdso_support.h b/absl/debugging/internal/vdso_support.h index 6562c6c2..cfca78d3 100644 --- a/absl/debugging/internal/vdso_support.h +++ b/absl/debugging/internal/vdso_support.h @@ -48,7 +48,7 @@ #ifdef ABSL_HAVE_VDSO_SUPPORT #error ABSL_HAVE_VDSO_SUPPORT cannot be directly set -#else +#elif !defined(__GNU__) #define ABSL_HAVE_VDSO_SUPPORT 1 #endif |