gold: Use char16_t, char32_t instead of uint16_t, uint32_t as character types

The std::basic_string template type is only specified for
instantiations using character types.  Newer (LLVM) libc++
implementations no longer allow non-character integer types
to be used.

gold/
	* output.cc: Include <uchar.h>.
	(Output_section::add_merge_input_section): Use char16_t and
	char32_t for 2- and 4-byte entry size, respectively.
	* stringpool.cc: Include <uchar.h>.
	(Stringpool_template): Explicitly instantiate for char16_t,
	char32_t instead of uint16_t, uint32_t.
	* merge.cc (Output_merge_string): Likewise.

Author: frobtech

gold/ChangeLog

@@ -1,3 +1,17 @@
+2023-09-05  Roland McGrath  <[email protected]>
+
+	The std::basic_string template type is only specified for
+	instantiations using character types.  Newer (LLVM) libc++
+	implementations no longer allow non-character integer types
+	to be used.
+	* output.cc: Include <uchar.h>.
+	(Output_section::add_merge_input_section): Use char16_t and
+	char32_t for 2- and 4-byte entry size, respectively.
+	* stringpool.cc: Include <uchar.h>.
+	(Stringpool_template): Explicitly instantiate for char16_t,
+	char32_t instead of uint16_t, uint32_t.
+	* merge.cc (Output_merge_string): Likewise.
+
 2023-07-03  Nick Clifton  <[email protected]>
 
 	* po/gold.pot: Regenerate.

gold/merge.cc

@@ -665,10 +665,10 @@ template
 class Output_merge_string<char>;
 
 template
-class Output_merge_string<uint16_t>;
+class Output_merge_string<char16_t>;
 
 template
-class Output_merge_string<uint32_t>;
+class Output_merge_string<char32_t>;
 
 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
 template

gold/output.cc

@@ -29,6 +29,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 #include <algorithm>
+#include <uchar.h>
 
 #ifdef HAVE_SYS_MMAN_H
 #include <sys/mman.h>
@@ -2706,10 +2707,10 @@ Output_section::add_merge_input_section(Relobj* object, unsigned int shndx,
 	      pomb = new Output_merge_string<char>(addralign);
 	      break;
 	    case 2:
-	      pomb = new Output_merge_string<uint16_t>(addralign);
+	      pomb = new Output_merge_string<char16_t>(addralign);
 	      break;
 	    case 4:
-	      pomb = new Output_merge_string<uint32_t>(addralign);
+	      pomb = new Output_merge_string<char32_t>(addralign);
 	      break;
 	    default:
 	      return false;

gold/stringpool.cc

@@ -25,6 +25,7 @@
 #include <cstring>
 #include <algorithm>
 #include <vector>
+#include <uchar.h>
 
 #include "output.h"
 #include "parameters.h"
@@ -527,9 +528,9 @@ template
 class Stringpool_template<char>;
 
 template
-class Stringpool_template<uint16_t>;
+class Stringpool_template<char16_t>;
 
 template
-class Stringpool_template<uint32_t>;
+class Stringpool_template<char32_t>;
 
 } // End namespace gold.