New upstream version 1.2upstream/1.2

1 files changed, 26 insertions, 8 deletions

diff --git a/lib/relocatable.h b/lib/relocatable.h
index 49452fe7..162f9d82 100644
--- a/lib/relocatable.h
+++ b/lib/relocatable.h
@@ -1,5 +1,5 @@
 /* Provide relocatable packages.
-   Copyright (C) 2003, 2005, 2008-2022 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2005, 2008-2024 Free Software Foundation, Inc.
    Written by Bruno Haible <bruno@clisp.org>, 2003.
 
    This file is free software: you can redistribute it and/or modify
@@ -18,6 +18,11 @@
 #ifndef _RELOCATABLE_H
 #define _RELOCATABLE_H
 
+/* This file uses _GL_ATTRIBUTE_MALLOC, HAVE_VISIBILITY.  */
+#if !_GL_CONFIG_H_INCLUDED
+ #error "Please include config.h first."
+#endif
+
 #include <stdlib.h>
 
 #ifdef __cplusplus
@@ -28,15 +33,28 @@ extern "C" {
 /* This can be enabled through the configure --enable-relocatable option.  */
 #if ENABLE_RELOCATABLE
 
-/* When building a DLL, we must export some functions.  Note that because
-   this is a private .h file, we don't need to use __declspec(dllimport)
-   in any case.  */
+/* When building a shared library, we must export some functions.
+   Note that because this is a private .h file, we don't need to use
+   __declspec(dllimport) in any case.  */
 #if HAVE_VISIBILITY && BUILDING_DLL
-# define RELOCATABLE_DLL_EXPORTED __attribute__((__visibility__("default")))
+# define RELOCATABLE_SHLIB_EXPORTED __attribute__((__visibility__("default")))
 #elif defined _MSC_VER && BUILDING_DLL
-# define RELOCATABLE_DLL_EXPORTED __declspec(dllexport)
+/* When building with MSVC, exporting a symbol means that the object file
+   contains a "linker directive" of the form /EXPORT:symbol.  This can be
+   inspected through the "objdump -s --section=.drectve FILE" or
+   "dumpbin /directives FILE" commands.
+   The symbols from this file should be exported if and only if the object
+   file gets included in a DLL.  Libtool, on Windows platforms, defines
+   the C macro DLL_EXPORT (together with PIC) when compiling for a shared
+   library (called DLL under Windows) and does not define it when compiling
+   an object file meant to be linked statically into some executable.  */
+# if defined DLL_EXPORT
+#  define RELOCATABLE_SHLIB_EXPORTED __declspec(dllexport)
+# else
+#  define RELOCATABLE_SHLIB_EXPORTED
+# endif
 #else
-# define RELOCATABLE_DLL_EXPORTED
+# define RELOCATABLE_SHLIB_EXPORTED
 #endif
 
 /* Sets the original and the current installation prefix of the package.
@@ -44,7 +62,7 @@ extern "C" {
    by the corresponding pathname with the current prefix instead.  Both
    prefixes should be directory names without trailing slash (i.e. use ""
    instead of "/").  */
-extern RELOCATABLE_DLL_EXPORTED void
+extern RELOCATABLE_SHLIB_EXPORTED void
        set_relocation_prefix (const char *orig_prefix,
                               const char *curr_prefix);