nobu	2018-01-29 15:54:22 +0900 (Mon, 29 Jan 2018)

  New Revision: 62086

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=62086

  Log:
    ruby.c: no VARIABLE_LIBPATH
    
    * ruby.c (ruby_init_loadpath_safe): removed code using fixed size
      path buffer.  relative load path is supported only on platforms
      where dladdr is available, or on Windows, so !VARIABLE_LIBPATH
      code is not used.

  Modified files:
    trunk/ruby.c
Index: ruby.c
===================================================================
--- ruby.c	(revision 62085)
+++ ruby.c	(revision 62086)
@@ -485,17 +485,8 @@ ruby_init_loadpath_safe(int safe_level) https://github.com/ruby/ruby/blob/trunk/ruby.c#L485
     ID id_initial_load_path_mark;
     const char *paths = ruby_initial_load_paths;
 #if defined LOAD_RELATIVE
-# if defined HAVE_DLADDR || defined __CYGWIN__ || defined _WIN32
-#   define VARIABLE_LIBPATH 1
-# else
-#   define VARIABLE_LIBPATH 0
-# endif
-# if VARIABLE_LIBPATH
     char *libpath;
     VALUE sopath;
-# else
-    char libpath[MAXPATHLEN + 1];
-# endif
     size_t baselen;
     char *p;
 
@@ -527,11 +518,10 @@ ruby_init_loadpath_safe(int safe_level) https://github.com/ruby/ruby/blob/trunk/ruby.c#L518
 #elif defined(HAVE_DLADDR)
     sopath = dladdr_path((void *)(VALUE)expand_include_path);
     libpath = RSTRING_PTR(sopath);
+#else
+# error relative load path is not supported on this platform.
 #endif
 
-#if !VARIABLE_LIBPATH
-    libpath[sizeof(libpath) - 1] = '\0';
-#endif
 #if defined DOSISH && !defined _WIN32
     translit_char(libpath, '\\', '/');
 #elif defined __CYGWIN__
@@ -582,26 +572,12 @@ ruby_init_loadpath_safe(int safe_level) https://github.com/ruby/ruby/blob/trunk/ruby.c#L572
 	    p = p2;
 	}
 #endif
-#if !VARIABLE_LIBPATH
-	*p = 0;
-#endif
-    }
-#if !VARIABLE_LIBPATH
-    else {
-	strlcpy(libpath, ".", sizeof(libpath));
-	p = libpath + 1;
     }
     baselen = p - libpath;
-#define PREFIX_PATH() rb_str_new(libpath, baselen)
-#else
-    baselen = p - libpath;
     rb_str_resize(sopath, baselen);
     libpath = RSTRING_PTR(sopath);
 #define PREFIX_PATH() sopath
-#endif
-
 #define BASEPATH() rb_str_buf_cat(rb_str_buf_new(baselen+len), libpath, baselen)
-
 #define RUBY_RELATIVE(path, len) rb_str_buf_cat(BASEPATH(), (path), (len))
 #else
     const size_t exec_prefix_len = strlen(ruby_exec_prefix);

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