Use no-libc Linux start for glibc default apps

Author: rtfeldman

src/backend/llvm/MonoLlvmCodeGen.zig

@@ -1388,7 +1388,7 @@ pub const MonoLlvmCodeGen = struct {
         arg_layouts: []const layout.Idx,
         ret_layout: layout.Idx,
     ) Error!void {
-        if (self.enable_default_platform_runtime and
+        if (self.enable_default_platform_hosted_calls and
             self.host_call_mode == .extern_symbols and
             self.target.os.tag == .linux and
             std.mem.eql(u8, symbol_name, "_start"))
@@ -4855,10 +4855,7 @@ pub const MonoLlvmCodeGen = struct {
 
     fn emitDefaultPlatformWriteStdout(self: *MonoLlvmCodeGen, ptr: LlvmBuilder.Value, len: LlvmBuilder.Value) Error!void {
         switch (self.target.os.tag) {
-            .linux => switch (self.target.abi) {
-                .gnu, .gnueabi, .gnueabihf, .gnux32 => try self.emitCWriteStdout(ptr, len),
-                else => try self.emitLinuxWriteStdout(ptr, len),
-            },
+            .linux => try self.emitLinuxWriteStdout(ptr, len),
             .macos, .windows => try self.emitCWriteStdout(ptr, len),
             else => return error.CompilationFailed,
         }

src/cli/main.zig

@@ -3646,7 +3646,7 @@ fn defaultBuildPlatformSource(args: cli_args.BuildArgs) []const u8 {
     if (args.target) |target_str| {
         if (RocTarget.fromString(target_str)) |target| {
             return switch (target) {
-                .x64glibc, .arm64glibc, .x64mac, .arm64mac, .x64win, .arm64win => echo_platform.build_c_platform_main_source,
+                .x64mac, .arm64mac, .x64win, .arm64win => echo_platform.build_c_platform_main_source,
                 .wasm32 => echo_platform.build_wasm_archive_platform_main_source,
                 else => echo_platform.build_platform_main_source,
             };

src/echo_platform/mod.zig

@@ -32,6 +32,8 @@ pub const build_platform_main_source =
     \\        inputs: "targets/",
     \\        x64musl: { inputs: [app] },
     \\        arm64musl: { inputs: [app] },
+    \\        x64glibc: { inputs: [app] },
+    \\        arm64glibc: { inputs: [app] },
     \\    }
     \\
     \\import Echo
@@ -58,8 +60,6 @@ pub const build_c_platform_main_source =
     \\    hosted { "roc_default_echo_line": Echo.line! }
     \\    targets: {
     \\        inputs: "targets/",
-    \\        x64glibc: { inputs: [app] },
-    \\        arm64glibc: { inputs: [app] },
     \\        x64mac: { inputs: [app] },
     \\        arm64mac: { inputs: [app] },
     \\        x64win: { inputs: [app] },