meson/13935.patch

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From d082aec6ce0a3dc8ec7b3748a5130634d1f1c098 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Wed, 20 Nov 2024 16:19:49 +0100
Subject: [PATCH] rust: fix computation of library directory
Using a rustup-based toolchain fails the "rust/2 sharedlib" test for me:
./prog: error while loading shared libraries: libstd-211931512faabf29.so: cannot open shared object file: No such file or directory
This happens because recent rustup places the standard library under
SYSROOT/lib/rustlib/TARGET/lib. Retrieve the right directory using
"--print target-libdir". This also provides a more accurate version
for rustc installed in /usr.
Before:
$ echo $(/usr/bin/rustc --print sysroot)/lib
/usr/lib
After:
$ /usr/bin/rustc --print target-libdir
/usr/lib/rustlib/x86_64-unknown-linux-gnu/lib
While at it, cache the value to avoid repeated process invocation.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
mesonbuild/backend/ninjabackend.py | 2 +-
mesonbuild/compilers/rust.py | 7 +++++++
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
index 05d5320798fd..5716ea29e351 100644
--- a/mesonbuild/backend/ninjabackend.py
+++ b/mesonbuild/backend/ninjabackend.py
@@ -2125,7 +2125,7 @@ def _link_library(libname: str, static: bool, bundle: bool = False):
# ... but then add rustc's sysroot to account for rustup
# installations
for rpath_arg in rpath_args:
- args += ['-C', 'link-arg=' + rpath_arg + ':' + os.path.join(rustc.get_sysroot(), 'lib')]
+ args += ['-C', 'link-arg=' + rpath_arg + ':' + rustc.get_target_libdir()]
proc_macro_dylib_path = None
if getattr(target, 'rust_crate_type', '') == 'proc-macro':
diff --git a/mesonbuild/compilers/rust.py b/mesonbuild/compilers/rust.py
index f09911db642c..02ac593842ad 100644
--- a/mesonbuild/compilers/rust.py
+++ b/mesonbuild/compilers/rust.py
@@ -142,11 +142,18 @@ def _native_static_libs(self, work_dir: str, source_name: str) -> None:
def get_dependency_gen_args(self, outtarget: str, outfile: str) -> T.List[str]:
return ['--dep-info', outfile]
+ @functools.lru_cache(maxsize=None)
def get_sysroot(self) -> str:
cmd = self.get_exelist(ccache=False) + ['--print', 'sysroot']
p, stdo, stde = Popen_safe_logged(cmd)
return stdo.split('\n', maxsplit=1)[0]
+ @functools.lru_cache(maxsize=None)
+ def get_target_libdir(self) -> str:
+ cmd = self.get_exelist(ccache=False) + ['--print', 'target-libdir']
+ p, stdo, stde = Popen_safe_logged(cmd)
+ return stdo.split('\n', maxsplit=1)[0]
+
@functools.lru_cache(maxsize=None)
def get_crt_static(self) -> bool:
cmd = self.get_exelist(ccache=False) + ['--print', 'cfg']