X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/dacbc44ca3fc825c9e5ffa799f1a0937c1da0020..51caf50203be08ba6f15e0d72b777f036d6bee72:/src/conf_post.h

diff --git a/src/conf_post.h b/src/conf_post.h
index feb1bc2be1..2d967c0fef 100644
--- a/src/conf_post.h
+++ b/src/conf_post.h
@@ -40,17 +40,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #endif
 #endif
 
-/* This silences a few compilation warnings on FreeBSD.  */
-#ifdef BSD_SYSTEM_AHB
-#undef BSD_SYSTEM_AHB
-#undef BSD_SYSTEM
-#if __FreeBSD__ == 1
-#define BSD_SYSTEM 199103
-#elif __FreeBSD__ == 2
-#define BSD_SYSTEM 199306
-#elif __FreeBSD__ >= 3
-#define BSD_SYSTEM 199506
-#endif
+#ifndef __has_attribute
+# define __has_attribute(a) 0 /* non-clang */
 #endif
 
 #ifdef DARWIN_OS
@@ -58,8 +49,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define malloc unexec_malloc
 #define realloc unexec_realloc
 #define free unexec_free
-/* Don't use posix_memalign because it is not compatible with unexmacosx.c.  */
-#undef HAVE_POSIX_MEMALIGN
 #endif
 /* The following solves the problem that Emacs hangs when evaluating
    (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
@@ -121,14 +110,6 @@ You lose; /* Emacs for DOS must be compiled with DJGPP */
 
 #define emacs_raise(sig) msdos_fatal_signal (sig)
 
-#ifndef HAVE_SETPGID
-# ifdef USG
-#  define setpgid(pid, pgid) setpgrp ()
-# else
-#  define setpgid(pid, pgid) setpgrp (pid, pgid)
-# endif
-#endif
-
 /* Define one of these for easier conditionals.  */
 #ifdef HAVE_X_WINDOWS
 /* We need a little extra space, see ../../lisp/loadup.el and the
@@ -177,13 +158,7 @@ extern void _DebPrint (const char *fmt, ...);
 /* Tell regex.c to use a type compatible with Emacs.  */
 #define RE_TRANSLATE_TYPE Lisp_Object
 #define RE_TRANSLATE(TBL, C) char_table_translate (TBL, C)
-#ifdef make_number
-/* If make_number is a macro, use it.  */
 #define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
-#else
-/* If make_number is a function, avoid it.  */
-#define RE_TRANSLATE_P(TBL) (!(INTEGERP (TBL) && XINT (TBL) == 0))
-#endif
 #endif
 
 #include <string.h>
@@ -195,7 +170,9 @@ extern void _DebPrint (const char *fmt, ...);
 #define NO_INLINE
 #endif
 
-#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
+#if (__clang__								\
+     ? __has_attribute (externally_visible)				\
+     : (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
 #define EXTERNALLY_VISIBLE __attribute__((externally_visible))
 #else
 #define EXTERNALLY_VISIBLE
@@ -222,21 +199,59 @@ extern void _DebPrint (const char *fmt, ...);
 #undef noinline
 #endif
 
-#define INLINE _GL_INLINE
+/* Use Gnulib's extern-inline module for extern inline functions.
+   An include file foo.h should prepend FOO_INLINE to function
+   definitions, with the following overall pattern:
+
+      [#include any other .h files first.]
+      ...
+      INLINE_HEADER_BEGIN
+      ...
+      INLINE int
+      incr (int i)
+      {
+        return i + 1;
+      }
+      ...
+      INLINE_HEADER_END
+
+   For every executable, exactly one file that includes the header
+   should do this:
+
+      #define INLINE EXTERN_INLINE
+
+   before including config.h or any other .h file.
+   Other .c files should not define INLINE.
+
+   C99 compilers compile functions like 'incr' as C99-style extern
+   inline functions.  Pre-C99 GCCs do something similar with
+   GNU-specific keywords.  Pre-C99 non-GCC compilers use static
+   functions, which bloats the code but is good enough.  */
+
+#ifndef INLINE
+# define INLINE _GL_INLINE
+#endif
 #define EXTERN_INLINE _GL_EXTERN_INLINE
 #define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN
 #define INLINE_HEADER_END _GL_INLINE_HEADER_END
 
+/* To use the struct hack with N elements, declare the struct like this:
+     struct s { ...; t name[FLEXIBLE_ARRAY_MEMBER]; };
+   and allocate (offsetof (struct s, name) + N * sizeof (t)) bytes.  */
+#if 199901 <= __STDC_VERSION__
+# define FLEXIBLE_ARRAY_MEMBER
+#elif __GNUC__ && !defined __STRICT_ANSI__
+# define FLEXIBLE_ARRAY_MEMBER 0
+#else
+# define FLEXIBLE_ARRAY_MEMBER 1
+#endif
+
 /* Use this to suppress gcc's `...may be used before initialized' warnings. */
 #ifdef lint
 /* Use CODE only if lint checking is in effect.  */
 # define IF_LINT(Code) Code
-/* Assume that the expression COND is true.  This differs in intent
-   from 'assert', as it is a message from the programmer to the compiler.  */
-# define lint_assume(cond) ((cond) ? (void) 0 : abort ())
 #else
 # define IF_LINT(Code) /* empty */
-# define lint_assume(cond) ((void) (0 && (cond)))
 #endif
 
 /* conf_post.h ends here */