Add support for `--(no-)undefined-version`

Co-authored-by: Motiejus Jakštys <motiejus@jakstys.lt>
Co-authored-by: Jakub Konka <kubkon@jakubkonka.com>
Co-authored-by: Samuel Cantero <scanterog@gmail.com>
Co-authored-by: Giorgos Georgiou <giorgos.georgiou@datadoghq.com>
Co-authored-by: Carl Åstholm <carl@astholm.se>

4 files changed, 13 insertions, 5 deletions

diff --git a/src/link/Coff/lld.zig b/src/link/Coff/lld.zig
index 1115b91a57..6b9054b2b4 100644
--- a/src/link/Coff/lld.zig
+++ b/src/link/Coff/lld.zig
@@ -70,7 +70,7 @@ pub fn linkWithLLD(self: *Coff, arena: Allocator, prog_node: *std.Progress.Node)
         man = comp.cache_parent.obtain();
         self.base.releaseLock();
 
-        comptime assert(Compilation.link_hash_implementation_version == 10);
+        comptime assert(Compilation.link_hash_implementation_version == 11);
 
         for (comp.objects) |obj| {
             _ = try man.addFile(obj.path, null);
diff --git a/src/link/Elf.zig b/src/link/Elf.zig
index 2f1d5703f9..ef06c8e1dd 100644
--- a/src/link/Elf.zig
+++ b/src/link/Elf.zig
@@ -22,6 +22,7 @@ soname: ?[]const u8,
 bind_global_refs_locally: bool,
 linker_script: ?[]const u8,
 version_script: ?[]const u8,
+allow_undefined_version: bool,
 print_icf_sections: bool,
 print_map: bool,
 entry_name: ?[]const u8,
@@ -325,6 +326,7 @@ pub fn createEmpty(
         .bind_global_refs_locally = options.bind_global_refs_locally,
         .linker_script = options.linker_script,
         .version_script = options.version_script,
+        .allow_undefined_version = options.allow_undefined_version,
         .print_icf_sections = options.print_icf_sections,
         .print_map = options.print_map,
     };
@@ -2410,10 +2412,11 @@ fn linkWithLLD(self: *Elf, arena: Allocator, prog_node: *std.Progress.Node) !voi
         // We are about to obtain this lock, so here we give other processes a chance first.
         self.base.releaseLock();
 
-        comptime assert(Compilation.link_hash_implementation_version == 10);
+        comptime assert(Compilation.link_hash_implementation_version == 11);
 
         try man.addOptionalFile(self.linker_script);
         try man.addOptionalFile(self.version_script);
+        man.hash.add(self.allow_undefined_version);
         for (comp.objects) |obj| {
             _ = try man.addFile(obj.path, null);
             man.hash.add(obj.must_link);
@@ -2789,6 +2792,11 @@ fn linkWithLLD(self: *Elf, arena: Allocator, prog_node: *std.Progress.Node) !voi
                 try argv.append("-version-script");
                 try argv.append(version_script);
             }
+            if (self.allow_undefined_version) {
+                try argv.append("--undefined-version");
+            } else {
+                try argv.append("--no-undefined-version");
+            }
         }
 
         // Positional arguments to the linker such as object files.
diff --git a/src/link/MachO/zld.zig b/src/link/MachO/zld.zig
index b266bfeb47..57681dd935 100644
--- a/src/link/MachO/zld.zig
+++ b/src/link/MachO/zld.zig
@@ -55,7 +55,7 @@ pub fn linkWithZld(
         // We are about to obtain this lock, so here we give other processes a chance first.
         macho_file.base.releaseLock();
 
-        comptime assert(Compilation.link_hash_implementation_version == 10);
+        comptime assert(Compilation.link_hash_implementation_version == 11);
 
         for (objects) |obj| {
             _ = try man.addFile(obj.path, null);
diff --git a/src/link/Wasm.zig b/src/link/Wasm.zig
index 185d802588..9dbef32648 100644
--- a/src/link/Wasm.zig
+++ b/src/link/Wasm.zig
@@ -3547,7 +3547,7 @@ fn linkWithZld(wasm: *Wasm, arena: Allocator, prog_node: *std.Progress.Node) lin
         // We are about to obtain this lock, so here we give other processes a chance first.
         wasm.base.releaseLock();
 
-        comptime assert(Compilation.link_hash_implementation_version == 10);
+        comptime assert(Compilation.link_hash_implementation_version == 11);
 
         for (objects) |obj| {
             _ = try man.addFile(obj.path, null);
@@ -4633,7 +4633,7 @@ fn linkWithLLD(wasm: *Wasm, arena: Allocator, prog_node: *std.Progress.Node) !vo
         // We are about to obtain this lock, so here we give other processes a chance first.
         wasm.base.releaseLock();
 
-        comptime assert(Compilation.link_hash_implementation_version == 10);
+        comptime assert(Compilation.link_hash_implementation_version == 11);
 
         for (comp.objects) |obj| {
             _ = try man.addFile(obj.path, null);