Rework C source files to avoid ^(

[gnu-emacs] / src / conf_post.h

diff --git a/src/conf_post.h b/src/conf_post.h
index 1a080fad635ae762ac92436bfd1a5757ac3d5370..d0f04b637002b63ba01046997346ceae5c08e14e 100644 (file)
--- a/src/conf_post.h
+++ b/src/conf_post.h
@@ -1,14 +1,14 @@
 /* conf_post.h --- configure.ac includes this via AH_BOTTOM
 
-Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2015 Free Software
+Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2016 Free Software
 Foundation, Inc.
 
 This file is part of GNU Emacs.
 
 GNU Emacs is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
 
 GNU Emacs is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -51,10 +51,21 @@ typedef bool bool_bf;
 #endif
 #endif
 
-/* When not using Clang, assume its attributes and features are absent.  */
+/* Simulate __has_attribute on compilers that lack it.  It is used only
+   on arguments like alloc_size that are handled in this simulation.  */
 #ifndef __has_attribute
-# define __has_attribute(a) false
-#endif
+# define __has_attribute(a) __has_attribute_##a
+# define __has_attribute_alloc_size (4 < __GNUC__ + (3 <= __GNUC_MINOR__))
+# define __has_attribute_cleanup (3 < __GNUC__ + (4 <= __GNUC_MINOR__))
+# define __has_attribute_externally_visible \
+    (4 < __GNUC__ + (1 <= __GNUC_MINOR__))
+# define __has_attribute_no_address_safety_analysis false
+# define __has_attribute_no_sanitize_address \
+    (4 < __GNUC__ + (8 <= __GNUC_MINOR__))
+#endif
+
+/* Simulate __has_feature on compilers that lack it.  It is used only
+   to define ADDRESS_SANITIZER below.  */
 #ifndef __has_feature
 # define __has_feature(a) false
 #endif
@@ -206,6 +217,13 @@ extern void _DebPrint (const char *fmt, ...);
 #define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
 #endif
 
+/* Tell time_rz.c to use Emacs's getter and setter for TZ.
+   Only Emacs uses time_rz so this is OK.  */
+#define getenv_TZ emacs_getenv_TZ
+#define setenv_TZ emacs_setenv_TZ
+extern char *emacs_getenv_TZ (void);
+extern int emacs_setenv_TZ (char const *);
+
 #include <string.h>
 #include <stdlib.h>
 
@@ -215,9 +233,7 @@ extern void _DebPrint (const char *fmt, ...);
 #define NO_INLINE
 #endif
 
-#if (__clang__                                                         \
-     ? __has_attribute (externally_visible)                            \
-     : (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
+#if __has_attribute (externally_visible)
 #define EXTERNALLY_VISIBLE __attribute__((externally_visible))
 #else
 #define EXTERNALLY_VISIBLE
@@ -238,6 +254,7 @@ extern void _DebPrint (const char *fmt, ...);
 #endif
 
 #define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
+#define ATTRIBUTE_UNUSED _GL_UNUSED
 
 #if 3 <= __GNUC__
 # define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
@@ -245,9 +262,7 @@ extern void _DebPrint (const char *fmt, ...);
 # define ATTRIBUTE_MALLOC
 #endif
 
-#if (__clang__                                 \
-     ? __has_attribute (alloc_size)            \
-     : 4 < __GNUC__ + (3 <= __GNUC_MINOR__))
+#if __has_attribute (alloc_size)
 # define ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
 #else
 # define ATTRIBUTE_ALLOC_SIZE(args)
@@ -270,8 +285,7 @@ extern void _DebPrint (const char *fmt, ...);
 /* Attribute of functions whose code should not have addresses
    sanitized.  */
 
-#if (__has_attribute (no_sanitize_address) \
-     || 4 < __GNUC__ + (8 <= __GNUC_MINOR__))
+#if __has_attribute (no_sanitize_address)
 # define ATTRIBUTE_NO_SANITIZE_ADDRESS \
     __attribute__ ((no_sanitize_address)) ADDRESS_SANITIZER_WORKAROUND
 #elif __has_attribute (no_address_safety_analysis)
@@ -309,6 +323,11 @@ extern void _DebPrint (const char *fmt, ...);
 
    before including config.h or any other .h file.
    Other .c files should not define INLINE.
+   For Emacs, this is done by having emacs.c first '#define INLINE
+   EXTERN_INLINE' and then include every .h file that uses INLINE.
+
+   The INLINE_HEADER_BEGIN and INLINE_HEADER_END suppress bogus
+   warnings in some GCC versions; see ../m4/extern-inline.m4.
 
    C99 compilers compile functions like 'incr' as C99-style extern
    inline functions.  Buggy GCC implementations do something similar with