1# gnulib-common.m4 serial 11 2dnl Copyright (C) 2007-2009 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7# gl_COMMON 8# is expanded unconditionally through gnulib-tool magic. 9AC_DEFUN([gl_COMMON], [ 10 dnl Use AC_REQUIRE here, so that the code is expanded once only. 11 AC_REQUIRE([gl_00GNULIB]) 12 AC_REQUIRE([gl_COMMON_BODY]) 13]) 14AC_DEFUN([gl_COMMON_BODY], [ 15 AH_VERBATIM([isoc99_inline], 16[/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports 17 the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of 18 earlier versions), but does not display it by setting __GNUC_STDC_INLINE__. 19 __APPLE__ && __MACH__ test for MacOS X. 20 __APPLE_CC__ tests for the Apple compiler and its version. 21 __STDC_VERSION__ tests for the C99 mode. */ 22#if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__ 23# define __GNUC_STDC_INLINE__ 1 24#endif]) 25 AH_VERBATIM([unused_parameter], 26[/* Define as a marker that can be attached to function parameter declarations 27 for parameters that are not used. This helps to reduce warnings, such as 28 from GCC -Wunused-parameter. */ 29#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) 30# define _UNUSED_PARAMETER_ __attribute__ ((__unused__)) 31#else 32# define _UNUSED_PARAMETER_ 33#endif 34]) 35]) 36 37# gl_MODULE_INDICATOR([modulename]) 38# defines a C macro indicating the presence of the given module. 39AC_DEFUN([gl_MODULE_INDICATOR], 40[ 41 AC_DEFINE([GNULIB_]translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1], 42 [Define to 1 when using the gnulib module ]$1[.]) 43]) 44 45# m4_foreach_w 46# is a backport of autoconf-2.59c's m4_foreach_w. 47# Remove this macro when we can assume autoconf >= 2.60. 48m4_ifndef([m4_foreach_w], 49 [m4_define([m4_foreach_w], 50 [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])]) 51 52# AC_PROG_MKDIR_P 53# is a backport of autoconf-2.60's AC_PROG_MKDIR_P. 54# Remove this macro when we can assume autoconf >= 2.60. 55m4_ifdef([AC_PROG_MKDIR_P], [], [ 56 AC_DEFUN_ONCE([AC_PROG_MKDIR_P], 57 [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake 58 MKDIR_P='$(mkdir_p)' 59 AC_SUBST([MKDIR_P])])]) 60 61# AC_C_RESTRICT 62# This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61, 63# so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++ 64# works. 65# This definition can be removed once autoconf >= 2.62 can be assumed. 66AC_DEFUN([AC_C_RESTRICT], 67[AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict], 68 [ac_cv_c_restrict=no 69 # The order here caters to the fact that C++ does not require restrict. 70 for ac_kw in __restrict __restrict__ _Restrict restrict; do 71 AC_COMPILE_IFELSE([AC_LANG_PROGRAM( 72 [[typedef int * int_ptr; 73 int foo (int_ptr $ac_kw ip) { 74 return ip[0]; 75 }]], 76 [[int s[1]; 77 int * $ac_kw t = s; 78 t[0] = 0; 79 return foo(t)]])], 80 [ac_cv_c_restrict=$ac_kw]) 81 test "$ac_cv_c_restrict" != no && break 82 done 83 ]) 84 AH_VERBATIM([restrict], 85[/* Define to the equivalent of the C99 'restrict' keyword, or to 86 nothing if this is not supported. Do not define if restrict is 87 supported directly. */ 88#undef restrict 89/* Work around a bug in Sun C++: it does not support _Restrict, even 90 though the corresponding Sun C compiler does, which causes 91 "#define restrict _Restrict" in the previous line. Perhaps some future 92 version of Sun C++ will work with _Restrict; if so, it'll probably 93 define __RESTRICT, just as Sun C does. */ 94#if defined __SUNPRO_CC && !defined __RESTRICT 95# define _Restrict 96#endif]) 97 case $ac_cv_c_restrict in 98 restrict) ;; 99 no) AC_DEFINE([restrict], []) ;; 100 *) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;; 101 esac 102]) 103 104# gl_BIGENDIAN 105# is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd. 106# Note that AC_REQUIRE([AC_C_BIGENDIAN]) does not work reliably because some 107# macros invoke AC_C_BIGENDIAN with arguments. 108AC_DEFUN([gl_BIGENDIAN], 109[ 110 AC_C_BIGENDIAN 111]) 112 113# gl_CACHE_VAL_SILENT(cache-id, command-to-set-it) 114# is like AC_CACHE_VAL(cache-id, command-to-set-it), except that it does not 115# output a spurious "(cached)" mark in the midst of other configure output. 116# This macro should be used instead of AC_CACHE_VAL when it is not surrounded 117# by an AC_MSG_CHECKING/AC_MSG_RESULT pair. 118AC_DEFUN([gl_CACHE_VAL_SILENT], 119[ 120 saved_as_echo_n="$as_echo_n" 121 as_echo_n=':' 122 AC_CACHE_VAL([$1], [$2]) 123 as_echo_n="$saved_as_echo_n" 124]) 125