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From: https://github.com/lz4/lz4/pull/1468
commit 63267a77d863f63826d8b13ddb8c190d3a4c01c5
Author: Holger Hoffstätte <holger@applied-asynchrony.com>
Date: Mon Jul 22 22:11:19 2024 +0200
Fix stack alignment of _start() in freestanding test
When the freestanding test is built with any kind of optimization
that enables vectorized loops, special care must be taken to align
the stack for _start() at a 16-byte boundary.
diff --git a/tests/freestanding.c b/tests/freestanding.c
index 6109aa7..96de9d3 100644
--- a/tests/freestanding.c
+++ b/tests/freestanding.c
@@ -225,7 +225,7 @@ EXTERN_C int memcmp(const void *s1, const void *s2, size_t n) {
//
-EXTERN_C void _start(void) {
+EXTERN_C void __attribute__((force_align_arg_pointer)) _start(void) {
test();
MY_exit(0);
}
Disable the stack protector to allow building with clang.
See https://bugs.gentoo.org/936480
diff -up lz4-1.10.0/build/meson/meson/tests/meson.build lz4-1.10.0/build/meson/meson/tests/meson.build
--- lz4-1.10.0/build/meson/meson/tests/meson.build 2024-07-21 19:29:49.000000000 +0200
+++ lz4-1.10.0/build/meson/meson/tests/meson.build 2024-07-23 01:26:40.561113031 +0200
@@ -47,7 +47,7 @@ test_exes = {
},
'freestanding': {
'sources': files(lz4_source_root / 'tests/freestanding.c'),
- 'c_args': ['-ffreestanding', '-Wno-unused-parameter', '-Wno-declaration-after-statement'],
+ 'c_args': ['-ffreestanding', '-fno-stack-protector', '-Wno-unused-parameter', '-Wno-declaration-after-statement'],
'link_args': ['-nostdlib'],
'build': cc.get_id() in ['gcc', 'clang'] and
host_machine.system() == 'linux' and host_machine.cpu_family() == 'x86_64',
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