Make it compile with GCC-11

Fixes https://github.com/rui314/mold/issues/37

glob.cc

@@ -43,7 +43,8 @@ bool GlobPattern::match(std::string_view str) const {
     return str.starts_with(pat);
   case SUFFIX:
     return str.ends_with(pat);
-  case GENERIC:
+  default:
+    assert(kind == GENERIC);
     return generic_match(pat, str);
   }
 }

linker_script.cc

@@ -54,6 +54,8 @@ public:
     return *this;
   }
 
+  [[noreturn]] ~SyntaxError() = default;
+
   Fatal<E> out;
 };
 

mold.h

@@ -916,15 +916,15 @@ public:
   InputFile(Context<E> &ctx, MemoryMappedFile<E> *mb);
   InputFile() : name("<internal>") {}
 
+  template<typename T> std::span<T>
+  inline get_data(Context<E> &ctx, const ElfShdr<E> &shdr);
+
+  template<typename T> std::span<T>
+  inline get_data(Context<E> &ctx, i64 idx);
+
   inline std::string_view get_string(Context<E> &ctx, const ElfShdr<E> &shdr);
   inline std::string_view get_string(Context<E> &ctx, i64 idx);
 
-  template<typename T> std::span<T>
-  get_data(Context<E> &ctx, const ElfShdr<E> &shdr);
-
-  template<typename T> std::span<T>
-  get_data(Context<E> &ctx, i64 idx);
-
   ElfShdr<E> *find_section(i64 type);
 
   MemoryMappedFile<E> *mb;
@@ -2086,6 +2086,23 @@ inline std::span<FdeRecord<E>> InputSection<E>::get_fdes() const {
   return span.subspan(fde_begin, fde_end - fde_begin);
 }
 
+template <typename E>
+template <typename T>
+inline std::span<T> InputFile<E>::get_data(Context<E> &ctx, const ElfShdr<E> &shdr) {
+  std::string_view view = this->get_string(ctx, shdr);
+  if (view.size() % sizeof(T))
+    Fatal(ctx) << *this << ": corrupted section";
+  return {(T *)view.data(), view.size() / sizeof(T)};
+}
+
+template <typename E>
+template <typename T>
+inline std::span<T> InputFile<E>::get_data(Context<E> &ctx, i64 idx) {
+  if (elf_sections.size() <= idx)
+    Fatal(ctx) << *this << ": invalid section index";
+  return this->template get_data<T>(elf_sections[idx]);
+}
+
 template <typename E>
 inline std::string_view
 InputFile<E>::get_string(Context<E> &ctx, const ElfShdr<E> &shdr) {

object_file.cc

@@ -101,23 +101,6 @@ InputFile<E>::InputFile(Context<E> &ctx, MemoryMappedFile<E> *mb)
   shstrtab = this->get_string(ctx, shstrtab_idx);
 }
 
-template <typename E>
-template <typename T>
-std::span<T> InputFile<E>::get_data(Context<E> &ctx, const ElfShdr<E> &shdr) {
-  std::string_view view = this->get_string(ctx, shdr);
-  if (view.size() % sizeof(T))
-    Fatal(ctx) << *this << ": corrupted section";
-  return {(T *)view.data(), view.size() / sizeof(T)};
-}
-
-template <typename E>
-template <typename T>
-std::span<T> InputFile<E>::get_data(Context<E> &ctx, i64 idx) {
-  if (elf_sections.size() <= idx)
-    Fatal(ctx) << *this << ": invalid section index";
-  return this->template get_data<T>(elf_sections[idx]);
-}
-
 template <typename E>
 ElfShdr<E> *InputFile<E>::find_section(i64 type) {
   for (ElfShdr<E> &sec : elf_sections)

subprocess.cc

@@ -47,7 +47,12 @@ std::function<void()> fork_child() {
 
   // Child
   close(pipefd[0]);
-  return [=]() { write(pipefd[1], (char []){1}, 1); };
+
+  return [=]() {
+    char buf[] = {1};
+    int n = write(pipefd[1], buf, 1);
+    assert(n == 1);
+  };
 }
 
 static std::string base64(u8 *data, u64 size) {
@@ -81,7 +86,8 @@ static std::string compute_sha256(std::span<std::string_view> argv) {
   for (std::string_view arg : argv) {
     if (arg != "-preload" && arg != "--preload") {
       SHA256_Update(&sha, arg.data(), arg.size());
-      SHA256_Update(&sha, (char []){0}, 1);
+      char buf[] = {0};
+      SHA256_Update(&sha, buf, 1);
     }
   }
 
@@ -158,7 +164,9 @@ void try_resume_daemon(Context<E> &ctx) {
 
   send_fd(ctx, conn, STDOUT_FILENO);
   send_fd(ctx, conn, STDERR_FILENO);
-  i64 r = read(conn, (char[1]){}, 1);
+
+  char buf[1];
+  i64 r = read(conn, buf, 1);
   close(conn);
   if (r == 1)
     exit(0);
@@ -228,7 +236,8 @@ void daemonize(Context<E> &ctx, std::function<void()> *wait_for_client,
 
   *on_complete = [=]() {
     char buf[] = {1};
-    write(conn, buf, 1);
+    int n = write(conn, buf, 1);
+    assert(n == 1);
   };
 }