embrace the future slightly less

Turns out that even modern Debian aarch64 glibc libc_nonshared.a has
references to _init, meaning that the previous commit caused a
regression when trying to build any -lc executable on that target.

This commit backs out the changes to LibCInstallation.

There is still a fork in the road coming up when the self-hosted ELF
linker becomes load bearing on that target.

3 files changed, 72 insertions, 2 deletions

diff --git a/lib/std/zig/LibCInstallation.zig b/lib/std/zig/LibCInstallation.zig
index 8a7c6a15e1..56bc388f5d 100644
--- a/lib/std/zig/LibCInstallation.zig
+++ b/lib/std/zig/LibCInstallation.zig
@@ -694,8 +694,10 @@ fn appendCcExe(args: *std.ArrayList([]const u8), skip_cc_env_var: bool) !void {
 /// `CsuPaths`.
 pub const CrtBasenames = struct {
     crt0: ?[]const u8 = null,
+    crti: ?[]const u8 = null,
     crtbegin: ?[]const u8 = null,
     crtend: ?[]const u8 = null,
+    crtn: ?[]const u8 = null,
 
     pub const GetArgs = struct {
         target: std.Target,
@@ -749,96 +751,137 @@ pub const CrtBasenames = struct {
 
         return switch (target.os.tag) {
             .linux => switch (mode) {
-                .dynamic_lib => .{},
+                .dynamic_lib => .{
+                    .crti = "crti.o",
+                    .crtn = "crtn.o",
+                },
                 .dynamic_exe => .{
                     .crt0 = "crt1.o",
+                    .crti = "crti.o",
+                    .crtn = "crtn.o",
                 },
                 .dynamic_pie => .{
                     .crt0 = "Scrt1.o",
+                    .crti = "crti.o",
+                    .crtn = "crtn.o",
                 },
                 .static_exe => .{
                     .crt0 = "crt1.o",
+                    .crti = "crti.o",
+                    .crtn = "crtn.o",
                 },
                 .static_pie => .{
                     .crt0 = "rcrt1.o",
+                    .crti = "crti.o",
+                    .crtn = "crtn.o",
                 },
             },
             .dragonfly => switch (mode) {
                 .dynamic_lib => .{
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
                 .dynamic_exe => .{
                     .crt0 = "crt1.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbegin.o",
                     .crtend = "crtend.o",
+                    .crtn = "crtn.o",
                 },
                 .dynamic_pie => .{
                     .crt0 = "Scrt1.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
                 .static_exe => .{
                     .crt0 = "crt1.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbegin.o",
                     .crtend = "crtend.o",
+                    .crtn = "crtn.o",
                 },
                 .static_pie => .{
                     .crt0 = "Scrt1.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
             },
             .freebsd => switch (mode) {
                 .dynamic_lib => .{
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
                 .dynamic_exe => .{
                     .crt0 = "crt1.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbegin.o",
                     .crtend = "crtend.o",
+                    .crtn = "crtn.o",
                 },
                 .dynamic_pie => .{
                     .crt0 = "Scrt1.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
                 .static_exe => .{
                     .crt0 = "crt1.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginT.o",
                     .crtend = "crtend.o",
+                    .crtn = "crtn.o",
                 },
                 .static_pie => .{
                     .crt0 = "Scrt1.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
             },
             .netbsd => switch (mode) {
                 .dynamic_lib => .{
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
                 .dynamic_exe => .{
                     .crt0 = "crt0.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbegin.o",
                     .crtend = "crtend.o",
+                    .crtn = "crtn.o",
                 },
                 .dynamic_pie => .{
                     .crt0 = "crt0.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
                 .static_exe => .{
                     .crt0 = "crt0.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginT.o",
                     .crtend = "crtend.o",
+                    .crtn = "crtn.o",
                 },
                 .static_pie => .{
                     .crt0 = "crt0.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginT.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
             },
             .openbsd => switch (mode) {
@@ -859,34 +902,49 @@ pub const CrtBasenames = struct {
             },
             .haiku => switch (mode) {
                 .dynamic_lib => .{
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
                 .dynamic_exe => .{
                     .crt0 = "start_dyn.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbegin.o",
                     .crtend = "crtend.o",
+                    .crtn = "crtn.o",
                 },
                 .dynamic_pie => .{
                     .crt0 = "start_dyn.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
                 .static_exe => .{
                     .crt0 = "start_dyn.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbegin.o",
                     .crtend = "crtend.o",
+                    .crtn = "crtn.o",
                 },
                 .static_pie => .{
                     .crt0 = "start_dyn.o",
+                    .crti = "crti.o",
                     .crtbegin = "crtbeginS.o",
                     .crtend = "crtendS.o",
+                    .crtn = "crtn.o",
                 },
             },
             .solaris, .illumos => switch (mode) {
-                .dynamic_lib => .{},
+                .dynamic_lib => .{
+                    .crti = "crti.o",
+                    .crtn = "crtn.o",
+                },
                 .dynamic_exe, .dynamic_pie => .{
                     .crt0 = "crt1.o",
+                    .crti = "crti.o",
+                    .crtn = "crtn.o",
                 },
                 .static_exe, .static_pie => .{},
             },
@@ -897,8 +955,10 @@ pub const CrtBasenames = struct {
 
 pub const CrtPaths = struct {
     crt0: ?Path = null,
+    crti: ?Path = null,
     crtbegin: ?Path = null,
     crtend: ?Path = null,
+    crtn: ?Path = null,
 };
 
 pub fn resolveCrtPaths(
@@ -920,6 +980,7 @@ pub fn resolveCrtPaths(
             }) orelse true) "gcc80" else "gcc54";
             return .{
                 .crt0 = if (crt_basenames.crt0) |basename| try crt_dir_path.join(arena, basename) else null,
+                .crti = if (crt_basenames.crti) |basename| try crt_dir_path.join(arena, basename) else null,
                 .crtbegin = if (crt_basenames.crtbegin) |basename| .{
                     .root_dir = crt_dir_path.root_dir,
                     .sub_path = try fs.path.join(arena, &.{ crt_dir_path.sub_path, gccv, basename }),
@@ -928,6 +989,7 @@ pub fn resolveCrtPaths(
                     .root_dir = crt_dir_path.root_dir,
                     .sub_path = try fs.path.join(arena, &.{ crt_dir_path.sub_path, gccv, basename }),
                 } else null,
+                .crtn = if (crt_basenames.crtn) |basename| try crt_dir_path.join(arena, basename) else null,
             };
         },
         .haiku => {
@@ -937,15 +999,19 @@ pub fn resolveCrtPaths(
             };
             return .{
                 .crt0 = if (crt_basenames.crt0) |basename| try crt_dir_path.join(arena, basename) else null,
+                .crti = if (crt_basenames.crti) |basename| try crt_dir_path.join(arena, basename) else null,
                 .crtbegin = if (crt_basenames.crtbegin) |basename| try gcc_dir_path.join(arena, basename) else null,
                 .crtend = if (crt_basenames.crtend) |basename| try gcc_dir_path.join(arena, basename) else null,
+                .crtn = if (crt_basenames.crtn) |basename| try crt_dir_path.join(arena, basename) else null,
             };
         },
         else => {
             return .{
                 .crt0 = if (crt_basenames.crt0) |basename| try crt_dir_path.join(arena, basename) else null,
+                .crti = if (crt_basenames.crti) |basename| try crt_dir_path.join(arena, basename) else null,
                 .crtbegin = if (crt_basenames.crtbegin) |basename| try crt_dir_path.join(arena, basename) else null,
                 .crtend = if (crt_basenames.crtend) |basename| try crt_dir_path.join(arena, basename) else null,
+                .crtn = if (crt_basenames.crtn) |basename| try crt_dir_path.join(arena, basename) else null,
             };
         },
     }
diff --git a/src/Compilation.zig b/src/Compilation.zig
index a1fdc4fd1a..b85033264a 100644
--- a/src/Compilation.zig
+++ b/src/Compilation.zig
@@ -6743,8 +6743,10 @@ fn getCrtPathsInner(
 
     return .{
         .crt0 = if (basenames.crt0) |basename| try crtFilePath(crt_files, basename) else null,
+        .crti = if (basenames.crti) |basename| try crtFilePath(crt_files, basename) else null,
         .crtbegin = if (basenames.crtbegin) |basename| try crtFilePath(crt_files, basename) else null,
         .crtend = if (basenames.crtend) |basename| try crtFilePath(crt_files, basename) else null,
+        .crtn = if (basenames.crtn) |basename| try crtFilePath(crt_files, basename) else null,
     };
 }
 
diff --git a/src/link/Elf.zig b/src/link/Elf.zig
index 957675fb0e..ea2fa56a5d 100644
--- a/src/link/Elf.zig
+++ b/src/link/Elf.zig
@@ -1869,6 +1869,7 @@ fn linkWithLLD(self: *Elf, arena: Allocator, tid: Zcu.PerThread.Id, prog_node: s
         // csu prelude
         const csu = try comp.getCrtPaths(arena);
         if (csu.crt0) |p| try argv.append(try p.toString(arena));
+        if (csu.crti) |p| try argv.append(try p.toString(arena));
         if (csu.crtbegin) |p| try argv.append(try p.toString(arena));
 
         for (self.rpath_table.keys()) |rpath| {
@@ -2060,6 +2061,7 @@ fn linkWithLLD(self: *Elf, arena: Allocator, tid: Zcu.PerThread.Id, prog_node: s
 
         // crt postlude
         if (csu.crtend) |p| try argv.append(try p.toString(arena));
+        if (csu.crtn) |p| try argv.append(try p.toString(arena));
 
         if (self.base.allow_shlib_undefined) {
             try argv.append("--allow-shlib-undefined");