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linux: don't export getauxval when not required

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wooster0 2024-12-20 14:14:38 +09:00 committed by Alex Rønne Petersen
parent 27c1f2b3a0
commit 263ba34619
1 changed files with 9 additions and 9 deletions
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18
lib/std/os/linux.zig
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@ -482,22 +482,22 @@ pub const O = switch (native_arch) {
/// Set by startup code, used by `getauxval`.
pub var elf_aux_maybe: ?[*]std.elf.Auxv = null;
/// Whether an external or internal getauxval implementation is used.
const extern_getauxval = switch (builtin.zig_backend) {
// Calling extern functions is not yet supported with these backends
.stage2_aarch64, .stage2_arm, .stage2_riscv64, .stage2_sparc64 => false,
else => !builtin.link_libc,
};
comptime {
const root = @import("root");
// Export this only when building executable, otherwise it is overriding
// the libc implementation
if (extern_getauxval and (builtin.output_mode == .Exe or @hasDecl(root, "main"))) {
@export(&getauxvalImpl, .{ .name = "getauxval", .linkage = .weak });
}
}
pub const getauxval = if (extern_getauxval) struct {
comptime {
const root = @import("root");
// Export this only when building an executable, otherwise it is overriding
// the libc implementation
if (builtin.output_mode == .Exe or @hasDecl(root, "main")) {
@export(&getauxvalImpl, .{ .name = "getauxval", .linkage = .weak });
}
}
extern fn getauxval(index: usize) usize;
}.getauxval else getauxvalImpl;