Remove obsolete darwin dynloader code

not needed since macOS 10.3 (2003)

diff --git a/src/backend/port/dynloader/darwin.c b/src/backend/port/dynloader/darwin.c
index 93f19878f56a25d56dbf7fab51c01ce5490ec586..65fa0e39f21562843a2aab1095daa0765d7aec1d 100644 (file)
--- a/src/backend/port/dynloader/darwin.c
+++ b/src/backend/port/dynloader/darwin.c
@@ -1,24 +1,15 @@
 /*
  * Dynamic loading support for macOS (Darwin)
  *
- * If dlopen() is available (Darwin 10.3 and later), we just use it.
- * Otherwise we emulate it with the older, now deprecated, NSLinkModule API.
- *
  * src/backend/port/dynloader/darwin.c
  */
 #include "postgres.h"
 
-#ifdef HAVE_DLOPEN
 #include <dlfcn.h>
-#else
-#include <mach-o/dyld.h>
-#endif
 
 #include "dynloader.h"
 
 
-#ifdef HAVE_DLOPEN
-
 void *
 pg_dlopen(const char *filename)
 {
@@ -34,7 +25,6 @@ pg_dlclose(void *handle)
 PGFunction
 pg_dlsym(void *handle, const char *funcname)
 {
-       /* Do not prepend an underscore: see dlopen(3) */
        return dlsym(handle, funcname);
 }
 
@@ -43,96 +33,3 @@ pg_dlerror(void)
 {
        return dlerror();
 }
-#else                                                  /* !HAVE_DLOPEN */
-
-/*
- * These routines were taken from the Apache source, but were made
- * available with a PostgreSQL-compatible license.  Kudos Wilfredo
- * Sánchez <wsanchez@apple.com>.
- */
-
-static NSObjectFileImageReturnCode cofiff_result = NSObjectFileImageFailure;
-
-void *
-pg_dlopen(const char *filename)
-{
-       NSObjectFileImage image;
-
-       cofiff_result = NSCreateObjectFileImageFromFile(filename, &image);
-       if (cofiff_result != NSObjectFileImageSuccess)
-               return NULL;
-       return NSLinkModule(image, filename,
-                                               NSLINKMODULE_OPTION_BINDNOW |
-                                               NSLINKMODULE_OPTION_RETURN_ON_ERROR);
-}
-
-void
-pg_dlclose(void *handle)
-{
-       NSUnLinkModule(handle, NSUNLINKMODULE_OPTION_NONE);
-}
-
-PGFunction
-pg_dlsym(void *handle, const char *funcname)
-{
-       NSSymbol symbol;
-       char       *symname = (char *) malloc(strlen(funcname) + 2);
-
-       if (!symname)
-               return NULL;
-
-       sprintf(symname, "_%s", funcname);
-       if (NSIsSymbolNameDefined(symname))
-       {
-               symbol = NSLookupAndBindSymbol(symname);
-
-               free(symname);
-               return (PGFunction) NSAddressOfSymbol(symbol);
-       }
-       else
-       {
-               free(symname);
-               return NULL;
-       }
-}
-
-char *
-pg_dlerror(void)
-{
-       NSLinkEditErrors c;
-       int                     errorNumber;
-       const char *fileName;
-       const char *errorString = NULL;
-
-       switch (cofiff_result)
-       {
-               case NSObjectFileImageSuccess:
-                       /* must have failed in NSLinkModule */
-                       NSLinkEditError(&c, &errorNumber, &fileName, &errorString);
-                       if (errorString == NULL || *errorString == '\0')
-                               errorString = "unknown link-edit failure";
-                       break;
-               case NSObjectFileImageFailure:
-                       errorString = "failed to open object file";
-                       break;
-               case NSObjectFileImageInappropriateFile:
-                       errorString = "inappropriate object file";
-                       break;
-               case NSObjectFileImageArch:
-                       errorString = "object file is for wrong architecture";
-                       break;
-               case NSObjectFileImageFormat:
-                       errorString = "object file has wrong format";
-                       break;
-               case NSObjectFileImageAccess:
-                       errorString = "insufficient permissions for object file";
-                       break;
-               default:
-                       errorString = "unknown failure to open object file";
-                       break;
-       }
-
-       return (char *) errorString;
-}
-
-#endif                                                 /* HAVE_DLOPEN */