Commit 1f410b500c

@@ -1351,6 +1351,7 @@ fn linkWithLLD(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node) !v
         link.hashAddSystemLibs(&man.hash, self.base.options.system_libs);
         man.hash.add(allow_shlib_undefined);
         man.hash.add(self.base.options.bind_global_refs_locally);
+        man.hash.addOptional(self.base.options.compress_debug_sections);
         man.hash.add(self.base.options.tsan);
         man.hash.addOptionalBytes(self.base.options.sysroot);
         man.hash.add(self.base.options.linker_optimization);
@@ -1754,6 +1755,11 @@ fn linkWithLLD(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node) !v
             try argv.append("--allow-shlib-undefined");
         }
 
+        if (self.base.options.compress_debug_sections) |how| {
+            const arg = try std.fmt.allocPrint(arena, "--compress-debug-sections={s}", .{@tagName(how)});
+            try argv.append(arg);
+        }
+
         if (self.base.options.bind_global_refs_locally) {
             try argv.append("-Bsymbolic");
         }

@@ -860,6 +860,7 @@ pub const InitOptions = struct {
     linker_nxcompat: bool = false,
     linker_dynamicbase: bool = false,
     linker_optimization: ?u8 = null,
+    linker_compress_debug_sections: ?link.CompressDebugSections = null,
     major_subsystem_version: ?u32 = null,
     minor_subsystem_version: ?u32 = null,
     clang_passthrough_mode: bool = false,
@@ -1687,6 +1688,7 @@ pub fn create(gpa: Allocator, options: InitOptions) !*Compilation {
             .no_builtin = options.no_builtin,
             .allow_shlib_undefined = options.linker_allow_shlib_undefined,
             .bind_global_refs_locally = options.linker_bind_global_refs_locally orelse false,
+            .compress_debug_sections = options.linker_compress_debug_sections,
             .import_memory = options.linker_import_memory orelse false,
             .import_table = options.linker_import_table,
             .export_table = options.linker_export_table,
@@ -2459,6 +2461,7 @@ fn addNonIncrementalStuffToCacheManifest(comp: *Compilation, man: *Cache.Manifes
     man.hash.add(comp.bin_file.options.z_now);
     man.hash.add(comp.bin_file.options.z_relro);
     man.hash.add(comp.bin_file.options.hash_style);
+    man.hash.addOptional(comp.bin_file.options.compress_debug_sections);
     man.hash.add(comp.bin_file.options.include_compiler_rt);
     if (comp.bin_file.options.link_libc) {
         man.hash.add(comp.bin_file.options.libc_installation != null);

@@ -123,6 +123,7 @@ pub const Options = struct {
     nxcompat: bool,
     dynamicbase: bool,
     linker_optimization: u8,
+    compress_debug_sections: ?CompressDebugSections,
     bind_global_refs_locally: bool,
     import_memory: bool,
     import_table: bool,
@@ -219,6 +220,8 @@ pub const Options = struct {
 
 pub const HashStyle = enum { sysv, gnu, both };
 
+pub const CompressDebugSections = enum { none, zlib };
+
 pub const File = struct {
     tag: Tag,
     options: Options,

@@ -443,6 +443,8 @@ const usage_build_generic =
     \\  -dynamic                       Force output to be dynamically linked
     \\  -static                        Force output to be statically linked
     \\  -Bsymbolic                     Bind global references locally
+    \\  --compress-debug-sections=     Compress DWARF debug sections
+    \\      none|zlib
     \\  --subsystem [subsystem]        (Windows) /SUBSYSTEM:<subsystem> to the linker
     \\  --stack [size]                 Override default stack size
     \\  --image-base [addr]            Set base address for executable image
@@ -657,6 +659,7 @@ fn buildOutputType(
     var version_script: ?[]const u8 = null;
     var disable_c_depfile = false;
     var linker_gc_sections: ?bool = null;
+    var linker_compress_debug_sections: ?link.CompressDebugSections = null;
     var linker_allow_shlib_undefined: ?bool = null;
     var linker_bind_global_refs_locally: ?bool = null;
     var linker_import_memory: ?bool = null;
@@ -938,6 +941,11 @@ fn buildOutputType(
                         install_name = args_iter.next() orelse {
                             fatal("expected parameter after {s}", .{arg});
                         };
+                    } else if (mem.startsWith(u8, arg, "--compress-debug-sections=")) {
+                        const param = arg["--compress-debug-sections=".len..];
+                        linker_compress_debug_sections = std.meta.stringToEnum(link.CompressDebugSections, param) orelse {
+                            fatal("expected --compress-debug-sections=[none|zlib], found '{s}'", .{param});
+                        };
                     } else if (mem.eql(u8, arg, "-pagezero_size")) {
                         const next_arg = args_iter.next() orelse {
                             fatal("expected parameter after {s}", .{arg});
@@ -1776,6 +1784,15 @@ fn buildOutputType(
                     linker_global_base = parseIntSuffix(arg, "--global-base=".len);
                 } else if (mem.startsWith(u8, arg, "--export=")) {
                     try linker_export_symbol_names.append(arg["--export=".len..]);
+                } else if (mem.eql(u8, arg, "--compress-debug-sections")) {
+                    i += 1;
+                    if (i >= linker_args.items.len) {
+                        fatal("expected linker arg after '{s}'", .{arg});
+                    }
+                    const arg1 = linker_args.items[i];
+                    linker_compress_debug_sections = std.meta.stringToEnum(link.CompressDebugSections, arg1) orelse {
+                        fatal("expected [none|zlib] after --compress-debug-sections, found '{s}'", .{arg1});
+                    };
                 } else if (mem.eql(u8, arg, "-z")) {
                     i += 1;
                     if (i >= linker_args.items.len) {
@@ -2849,6 +2866,7 @@ fn buildOutputType(
         .linker_nxcompat = linker_nxcompat,
         .linker_dynamicbase = linker_dynamicbase,
         .linker_optimization = linker_optimization,
+        .linker_compress_debug_sections = linker_compress_debug_sections,
         .major_subsystem_version = major_subsystem_version,
         .minor_subsystem_version = minor_subsystem_version,
         .link_eh_frame_hdr = link_eh_frame_hdr,