| # gnulib-common.m4 serial 3 |
| dnl Copyright (C) 2007, 2009 Free Software Foundation, Inc. |
| dnl This file is free software; the Free Software Foundation |
| dnl gives unlimited permission to copy and/or distribute it, |
| dnl with or without modifications, as long as this notice is preserved. |
| |
| # gl_MODULE_INDICATOR([modulename]) |
| # defines a C macro indicating the presence of the given module. |
| AC_DEFUN([gl_MODULE_INDICATOR], |
| [ |
| AC_DEFINE([GNULIB_]translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1], |
| [Define to 1 when using the gnulib module ]$1[.]) |
| ]) |
| |
| # AC_PROG_MKDIR_P |
| # is a backport of autoconf-2.60's AC_PROG_MKDIR_P. |
| # Remove this macro when we can assume autoconf >= 2.60. |
| m4_ifdef([AC_PROG_MKDIR_P], [], [ |
| AC_DEFUN([AC_PROG_MKDIR_P], |
| [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake |
| MKDIR_P='$(mkdir_p)' |
| AC_SUBST([MKDIR_P])])]) |
| |
| # AC_C_RESTRICT |
| # This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61, |
| # so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++ |
| # works. |
| # This definition can be removed once autoconf >= 2.62 can be assumed. |
| AC_DEFUN([AC_C_RESTRICT], |
| [AC_CACHE_CHECK([for C/C++ restrict keyword], ac_cv_c_restrict, |
| [ac_cv_c_restrict=no |
| # The order here caters to the fact that C++ does not require restrict. |
| for ac_kw in __restrict __restrict__ _Restrict restrict; do |
| AC_COMPILE_IFELSE([AC_LANG_PROGRAM( |
| [[typedef int * int_ptr; |
| int foo (int_ptr $ac_kw ip) { |
| return ip[0]; |
| }]], |
| [[int s[1]; |
| int * $ac_kw t = s; |
| t[0] = 0; |
| return foo(t)]])], |
| [ac_cv_c_restrict=$ac_kw]) |
| test "$ac_cv_c_restrict" != no && break |
| done |
| ]) |
| AH_VERBATIM([restrict], |
| [/* Define to the equivalent of the C99 'restrict' keyword, or to |
| nothing if this is not supported. Do not define if restrict is |
| supported directly. */ |
| #undef restrict |
| /* Work around a bug in Sun C++: it does not support _Restrict, even |
| though the corresponding Sun C compiler does, which causes |
| "#define restrict _Restrict" in the previous line. Perhaps some future |
| version of Sun C++ will work with _Restrict; if so, it'll probably |
| define __RESTRICT, just as Sun C does. */ |
| #if defined __SUNPRO_CC && !defined __RESTRICT |
| # define _Restrict |
| #endif]) |
| case $ac_cv_c_restrict in |
| restrict) ;; |
| no) AC_DEFINE([restrict], []) ;; |
| *) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;; |
| esac |
| ]) |