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Diffstat (limited to 'lib/autoconf/types.m4')
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diff --git a/lib/autoconf/types.m4 b/lib/autoconf/types.m4 new file mode 100644 index 0000000..18fc175 --- /dev/null +++ b/lib/autoconf/types.m4 @@ -0,0 +1,1077 @@ +# This file is part of Autoconf. -*- Autoconf -*- +# Type related macros: existence, sizeof, and structure members. +# +# Copyright (C) 2000-2002, 2004-2012 Free Software Foundation, Inc. + +# This file is part of Autoconf. This program 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. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# Under Section 7 of GPL version 3, you are granted additional +# permissions described in the Autoconf Configure Script Exception, +# version 3.0, as published by the Free Software Foundation. +# +# You should have received a copy of the GNU General Public License +# and a copy of the Autoconf Configure Script Exception along with +# this program; see the files COPYINGv3 and COPYING.EXCEPTION +# respectively. If not, see <http://www.gnu.org/licenses/>. + +# Written by David MacKenzie, with help from +# Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor, +# Roland McGrath, Noah Friedman, david d zuhn, and many others. + + +## ---------------- ## +## Type existence. ## +## ---------------- ## + +# ---------------- # +# General checks. # +# ---------------- # + +# Up to 2.13 included, Autoconf used to provide the macro +# +# AC_CHECK_TYPE(TYPE, DEFAULT) +# +# Since, it provides another version which fits better with the other +# AC_CHECK_ families: +# +# AC_CHECK_TYPE(TYPE, +# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], +# [INCLUDES = DEFAULT-INCLUDES]) +# +# In order to provide backward compatibility, the new scheme is +# implemented as _AC_CHECK_TYPE_NEW, the old scheme as _AC_CHECK_TYPE_OLD, +# and AC_CHECK_TYPE branches to one or the other, depending upon its +# arguments. + + +# _AC_CHECK_TYPE_NEW_BODY +# ----------------------- +# Shell function body for _AC_CHECK_TYPE_NEW. This macro implements the +# former task of AC_CHECK_TYPE, with one big difference though: AC_CHECK_TYPE +# used to grep in the headers, which, BTW, led to many problems until the +# extended regular expression was correct and did not give false positives. +# It turned out there are even portability issues with egrep... +# +# The most obvious way to check for a TYPE is just to compile a variable +# definition: +# +# TYPE my_var; +# +# (TYPE being the second parameter to the shell function, hence $[]2 in m4). +# Unfortunately this does not work for const qualified types in C++, where +# you need an initializer. So you think of +# +# TYPE my_var = (TYPE) 0; +# +# Unfortunately, again, this is not valid for some C++ classes. +# +# Then you look for another scheme. For instance you think of declaring +# a function which uses a parameter of type TYPE: +# +# int foo (TYPE param); +# +# but of course you soon realize this does not make it with K&R +# compilers. And by no means do you want to use this: +# +# int foo (param) +# TYPE param +# { ; } +# +# since C++ would complain loudly. +# +# Don't even think of using a function return type, since K&R cries +# there too. So you start thinking of declaring a *pointer* to this TYPE: +# +# TYPE *p; +# +# but you know fairly well that this is legal in C for aggregates which +# are unknown (TYPE = struct does-not-exist). +# +# Then you think of using sizeof to make sure the TYPE is really +# defined: +# +# sizeof (TYPE); +# +# That is great, but has one drawback: it succeeds when TYPE happens +# to be a variable: you'd get the size of the variable's type. +# Obviously, we must not accept a variable in place of a type name. +# +# So, to filter out the last possibility, we will require that this fail: +# +# sizeof ((TYPE)); +# +# This evokes a syntax error when TYPE is a type, but succeeds if TYPE +# is actually a variable. +# +# Also note that we use +# +# if (sizeof (TYPE)) +# +# to `read' sizeof (to avoid warnings), while not depending on its type +# (not necessarily size_t etc.). +# +# C++ disallows defining types inside `sizeof ()', but that's OK, +# since we don't want to consider unnamed structs to be types for C++, +# precisely because they don't work in cases like that. +m4_define([_AC_CHECK_TYPE_NEW_BODY], +[ AS_LINENO_PUSH([$[]1]) + AC_CACHE_CHECK([for $[]2], [$[]3], + [AS_VAR_SET([$[]3], [no]) + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([$[]4], + [if (sizeof ($[]2)) + return 0;])], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([$[]4], + [if (sizeof (($[]2))) + return 0;])], + [], + [AS_VAR_SET([$[]3], [yes])])])]) + AS_LINENO_POP +])dnl + +# _AC_CHECK_TYPE_NEW(TYPE, +# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], +# [INCLUDES = DEFAULT-INCLUDES]) +# ------------------------------------------------------------ +# Check whether the type TYPE is supported by the system, maybe via the +# the provided includes. +AC_DEFUN([_AC_CHECK_TYPE_NEW], +[AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_check_type], + [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_check_type], + [LINENO TYPE VAR INCLUDES], + [Tests whether TYPE exists after having included INCLUDES, setting + cache variable VAR accordingly.])], + [$0_BODY])]dnl +[AS_VAR_PUSHDEF([ac_Type], [ac_cv_type_$1])]dnl +[ac_fn_[]_AC_LANG_ABBREV[]_check_type "$LINENO" "$1" "ac_Type" ]dnl +["AS_ESCAPE([AC_INCLUDES_DEFAULT([$4])], [""])" +AS_VAR_IF([ac_Type], [yes], [$2], [$3]) +AS_VAR_POPDEF([ac_Type])dnl +])# _AC_CHECK_TYPE_NEW + + +# _AC_CHECK_TYPES(TYPE) +# --------------------- +# Helper to AC_CHECK_TYPES, which generates two of the four arguments +# to _AC_CHECK_TYPE_NEW that are based on TYPE. +m4_define([_AC_CHECK_TYPES], +[[$1], [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_$1]), [1], + [Define to 1 if the system has the type `$1'.])]]) + + +# AC_CHECK_TYPES(TYPES, +# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], +# [INCLUDES = DEFAULT-INCLUDES]) +# -------------------------------------------------------- +# TYPES is an m4 list. There are no ambiguities here, we mean the newer +# AC_CHECK_TYPE. +AC_DEFUN([AC_CHECK_TYPES], +[m4_map_args_sep([_AC_CHECK_TYPE_NEW(_$0(], [)[ +$2], [$3], [$4])], [], $1)]) + + +# _AC_CHECK_TYPE_OLD(TYPE, DEFAULT) +# --------------------------------- +# FIXME: This is an extremely badly chosen name, since this +# macro actually performs an AC_REPLACE_TYPE. Some day we +# have to clean this up. +m4_define([_AC_CHECK_TYPE_OLD], +[_AC_CHECK_TYPE_NEW([$1],, + [AC_DEFINE_UNQUOTED([$1], [$2], + [Define to `$2' if <sys/types.h> does not define.])])dnl +])# _AC_CHECK_TYPE_OLD + + +# _AC_CHECK_TYPE_REPLACEMENT_TYPE_P(STRING) +# ----------------------------------------- +# Return `1' if STRING seems to be a builtin C/C++ type, i.e., if it +# starts with `_Bool', `bool', `char', `double', `float', `int', +# `long', `short', `signed', or `unsigned' followed by characters +# that are defining types. +# Because many people have used `off_t' and `size_t' too, they are added +# for better common-use backward compatibility. +m4_define([_AC_CHECK_TYPE_REPLACEMENT_TYPE_P], +[m4_bmatch([$1], + [^\(_Bool\|bool\|char\|double\|float\|int\|long\|short\|\(un\)?signed\|[_a-zA-Z][_a-zA-Z0-9]*_t\)[][_a-zA-Z0-9() *]*$], + 1, 0)dnl +])# _AC_CHECK_TYPE_REPLACEMENT_TYPE_P + + +# _AC_CHECK_TYPE_MAYBE_TYPE_P(STRING) +# ----------------------------------- +# Return `1' if STRING looks like a C/C++ type. +m4_define([_AC_CHECK_TYPE_MAYBE_TYPE_P], +[m4_bmatch([$1], [^[_a-zA-Z0-9 ]+\([_a-zA-Z0-9() *]\|\[\|\]\)*$], + 1, 0)dnl +])# _AC_CHECK_TYPE_MAYBE_TYPE_P + + +# AC_CHECK_TYPE(TYPE, DEFAULT) +# or +# AC_CHECK_TYPE(TYPE, +# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], +# [INCLUDES = DEFAULT-INCLUDES]) +# ------------------------------------------------------- +# +# Dispatch respectively to _AC_CHECK_TYPE_OLD or _AC_CHECK_TYPE_NEW. +# 1. More than two arguments => NEW +# 2. $2 seems to be replacement type => OLD +# See _AC_CHECK_TYPE_REPLACEMENT_TYPE_P for `replacement type'. +# 3. $2 seems to be a type => NEW plus a warning +# 4. default => NEW +AC_DEFUN([AC_CHECK_TYPE], +[m4_cond([$#], [3], + [_AC_CHECK_TYPE_NEW], + [$#], [4], + [_AC_CHECK_TYPE_NEW], + [_AC_CHECK_TYPE_REPLACEMENT_TYPE_P([$2])], [1], + [_AC_CHECK_TYPE_OLD], + [_AC_CHECK_TYPE_MAYBE_TYPE_P([$2])], [1], + [AC_DIAGNOSE([syntax], + [$0: assuming `$2' is not a type])_AC_CHECK_TYPE_NEW], + [_AC_CHECK_TYPE_NEW])($@)])# AC_CHECK_TYPE + + + +# ---------------------------- # +# Types that must be checked. # +# ---------------------------- # + +AN_IDENTIFIER([ptrdiff_t], [AC_CHECK_TYPES]) + + +# ----------------- # +# Specific checks. # +# ----------------- # + +# AC_TYPE_GETGROUPS +# ----------------- +AC_DEFUN([AC_TYPE_GETGROUPS], +[AC_REQUIRE([AC_TYPE_UID_T])dnl +AC_CACHE_CHECK(type of array argument to getgroups, ac_cv_type_getgroups, +[AC_RUN_IFELSE([AC_LANG_SOURCE( +[[/* Thanks to Mike Rendell for this test. */ +]AC_INCLUDES_DEFAULT[ +#define NGID 256 +#undef MAX +#define MAX(x, y) ((x) > (y) ? (x) : (y)) + +int +main () +{ + gid_t gidset[NGID]; + int i, n; + union { gid_t gval; long int lval; } val; + + val.lval = -1; + for (i = 0; i < NGID; i++) + gidset[i] = val.gval; + n = getgroups (sizeof (gidset) / MAX (sizeof (int), sizeof (gid_t)) - 1, + gidset); + /* Exit non-zero if getgroups seems to require an array of ints. This + happens when gid_t is short int but getgroups modifies an array + of ints. */ + return n > 0 && gidset[n] != val.gval; +}]])], + [ac_cv_type_getgroups=gid_t], + [ac_cv_type_getgroups=int], + [ac_cv_type_getgroups=cross]) +if test $ac_cv_type_getgroups = cross; then + dnl When we can't run the test program (we are cross compiling), presume + dnl that <unistd.h> has either an accurate prototype for getgroups or none. + dnl Old systems without prototypes probably use int. + AC_EGREP_HEADER([getgroups.*int.*gid_t], unistd.h, + ac_cv_type_getgroups=gid_t, ac_cv_type_getgroups=int) +fi]) +AC_DEFINE_UNQUOTED(GETGROUPS_T, $ac_cv_type_getgroups, + [Define to the type of elements in the array set by + `getgroups'. Usually this is either `int' or `gid_t'.]) +])# AC_TYPE_GETGROUPS + + +# AU::AM_TYPE_PTRDIFF_T +# --------------------- +AU_DEFUN([AM_TYPE_PTRDIFF_T], +[AC_CHECK_TYPES(ptrdiff_t)]) + + +# AC_TYPE_INTMAX_T +# ---------------- +AC_DEFUN([AC_TYPE_INTMAX_T], +[ + AC_REQUIRE([AC_TYPE_LONG_LONG_INT]) + AC_CHECK_TYPE([intmax_t], + [AC_DEFINE([HAVE_INTMAX_T], 1, + [Define to 1 if the system has the type `intmax_t'.])], + [test $ac_cv_type_long_long_int = yes \ + && ac_type='long long int' \ + || ac_type='long int' + AC_DEFINE_UNQUOTED([intmax_t], [$ac_type], + [Define to the widest signed integer type + if <stdint.h> and <inttypes.h> do not define.])]) +]) + + +# AC_TYPE_UINTMAX_T +# ----------------- +AC_DEFUN([AC_TYPE_UINTMAX_T], +[ + AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT]) + AC_CHECK_TYPE([uintmax_t], + [AC_DEFINE([HAVE_UINTMAX_T], 1, + [Define to 1 if the system has the type `uintmax_t'.])], + [test $ac_cv_type_unsigned_long_long_int = yes \ + && ac_type='unsigned long long int' \ + || ac_type='unsigned long int' + AC_DEFINE_UNQUOTED([uintmax_t], [$ac_type], + [Define to the widest unsigned integer type + if <stdint.h> and <inttypes.h> do not define.])]) +]) + + +# AC_TYPE_INTPTR_T +# ---------------- +AC_DEFUN([AC_TYPE_INTPTR_T], +[ + AC_CHECK_TYPE([intptr_t], + [AC_DEFINE([HAVE_INTPTR_T], 1, + [Define to 1 if the system has the type `intptr_t'.])], + [for ac_type in 'int' 'long int' 'long long int'; do + AC_COMPILE_IFELSE( + [AC_LANG_BOOL_COMPILE_TRY( + [AC_INCLUDES_DEFAULT], + [[sizeof (void *) <= sizeof ($ac_type)]])], + [AC_DEFINE_UNQUOTED([intptr_t], [$ac_type], + [Define to the type of a signed integer type wide enough to + hold a pointer, if such a type exists, and if the system + does not define it.]) + ac_type=]) + test -z "$ac_type" && break + done]) +]) + + +# AC_TYPE_UINTPTR_T +# ----------------- +AC_DEFUN([AC_TYPE_UINTPTR_T], +[ + AC_CHECK_TYPE([uintptr_t], + [AC_DEFINE([HAVE_UINTPTR_T], 1, + [Define to 1 if the system has the type `uintptr_t'.])], + [for ac_type in 'unsigned int' 'unsigned long int' \ + 'unsigned long long int'; do + AC_COMPILE_IFELSE( + [AC_LANG_BOOL_COMPILE_TRY( + [AC_INCLUDES_DEFAULT], + [[sizeof (void *) <= sizeof ($ac_type)]])], + [AC_DEFINE_UNQUOTED([uintptr_t], [$ac_type], + [Define to the type of an unsigned integer type wide enough to + hold a pointer, if such a type exists, and if the system + does not define it.]) + ac_type=]) + test -z "$ac_type" && break + done]) +]) + + +# AC_TYPE_LONG_DOUBLE +# ------------------- +AC_DEFUN([AC_TYPE_LONG_DOUBLE], +[ + AC_CACHE_CHECK([for long double], [ac_cv_type_long_double], + [if test "$GCC" = yes; then + ac_cv_type_long_double=yes + else + AC_COMPILE_IFELSE( + [AC_LANG_BOOL_COMPILE_TRY( + [[/* The Stardent Vistra knows sizeof (long double), but does + not support it. */ + long double foo = 0.0L;]], + [[/* On Ultrix 4.3 cc, long double is 4 and double is 8. */ + sizeof (double) <= sizeof (long double)]])], + [ac_cv_type_long_double=yes], + [ac_cv_type_long_double=no]) + fi]) + if test $ac_cv_type_long_double = yes; then + AC_DEFINE([HAVE_LONG_DOUBLE], 1, + [Define to 1 if the system has the type `long double'.]) + fi +]) + + +# AC_TYPE_LONG_DOUBLE_WIDER +# ------------------------- +AC_DEFUN([AC_TYPE_LONG_DOUBLE_WIDER], +[ + AC_CACHE_CHECK( + [for long double with more range or precision than double], + [ac_cv_type_long_double_wider], + [AC_COMPILE_IFELSE( + [AC_LANG_BOOL_COMPILE_TRY( + [[#include <float.h> + long double const a[] = + { + 0.0L, DBL_MIN, DBL_MAX, DBL_EPSILON, + LDBL_MIN, LDBL_MAX, LDBL_EPSILON + }; + long double + f (long double x) + { + return ((x + (unsigned long int) 10) * (-1 / x) + a[0] + + (x ? f (x) : 'c')); + } + ]], + [[(0 < ((DBL_MAX_EXP < LDBL_MAX_EXP) + + (DBL_MANT_DIG < LDBL_MANT_DIG) + - (LDBL_MAX_EXP < DBL_MAX_EXP) + - (LDBL_MANT_DIG < DBL_MANT_DIG))) + && (int) LDBL_EPSILON == 0 + ]])], + ac_cv_type_long_double_wider=yes, + ac_cv_type_long_double_wider=no)]) + if test $ac_cv_type_long_double_wider = yes; then + AC_DEFINE([HAVE_LONG_DOUBLE_WIDER], 1, + [Define to 1 if the type `long double' works and has more range or + precision than `double'.]) + fi +])# AC_TYPE_LONG_DOUBLE_WIDER + + +# AC_C_LONG_DOUBLE +# ---------------- +AU_DEFUN([AC_C_LONG_DOUBLE], + [ + AC_TYPE_LONG_DOUBLE_WIDER + ac_cv_c_long_double=$ac_cv_type_long_double_wider + if test $ac_cv_c_long_double = yes; then + AC_DEFINE([HAVE_LONG_DOUBLE], 1, + [Define to 1 if the type `long double' works and has more range or + precision than `double'.]) + fi + ], + [The macro `AC_C_LONG_DOUBLE' is obsolete. +You should use `AC_TYPE_LONG_DOUBLE' or `AC_TYPE_LONG_DOUBLE_WIDER' instead.] +) + + +# _AC_TYPE_LONG_LONG_SNIPPET +# -------------------------- +# Expands to a C program that can be used to test for simultaneous support +# of 'long long' and 'unsigned long long'. We don't want to say that +# 'long long' is available if 'unsigned long long' is not, or vice versa, +# because too many programs rely on the symmetry between signed and unsigned +# integer types (excluding 'bool'). +AC_DEFUN([_AC_TYPE_LONG_LONG_SNIPPET], +[ + AC_LANG_PROGRAM( + [[/* For now, do not test the preprocessor; as of 2007 there are too many + implementations with broken preprocessors. Perhaps this can + be revisited in 2012. In the meantime, code should not expect + #if to work with literals wider than 32 bits. */ + /* Test literals. */ + long long int ll = 9223372036854775807ll; + long long int nll = -9223372036854775807LL; + unsigned long long int ull = 18446744073709551615ULL; + /* Test constant expressions. */ + typedef int a[((-9223372036854775807LL < 0 && 0 < 9223372036854775807ll) + ? 1 : -1)]; + typedef int b[(18446744073709551615ULL <= (unsigned long long int) -1 + ? 1 : -1)]; + int i = 63;]], + [[/* Test availability of runtime routines for shift and division. */ + long long int llmax = 9223372036854775807ll; + unsigned long long int ullmax = 18446744073709551615ull; + return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i) + | (llmax / ll) | (llmax % ll) + | (ull << 63) | (ull >> 63) | (ull << i) | (ull >> i) + | (ullmax / ull) | (ullmax % ull));]]) +]) + + +# AC_TYPE_LONG_LONG_INT +# --------------------- +AC_DEFUN([AC_TYPE_LONG_LONG_INT], +[ + AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT]) + AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int], + [ac_cv_type_long_long_int=yes + if test "x${ac_cv_prog_cc_c99-no}" = xno; then + ac_cv_type_long_long_int=$ac_cv_type_unsigned_long_long_int + if test $ac_cv_type_long_long_int = yes; then + dnl Catch a bug in Tandem NonStop Kernel (OSS) cc -O circa 2004. + dnl If cross compiling, assume the bug is not important, since + dnl nobody cross compiles for this platform as far as we know. + AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[@%:@include <limits.h> + @%:@ifndef LLONG_MAX + @%:@ define HALF \ + (1LL << (sizeof (long long int) * CHAR_BIT - 2)) + @%:@ define LLONG_MAX (HALF - 1 + HALF) + @%:@endif]], + [[long long int n = 1; + int i; + for (i = 0; ; i++) + { + long long int m = n << i; + if (m >> i != n) + return 1; + if (LLONG_MAX / 2 < m) + break; + } + return 0;]])], + [], + [ac_cv_type_long_long_int=no], + [:]) + fi + fi]) + if test $ac_cv_type_long_long_int = yes; then + AC_DEFINE([HAVE_LONG_LONG_INT], [1], + [Define to 1 if the system has the type `long long int'.]) + fi +]) + + +# AC_TYPE_UNSIGNED_LONG_LONG_INT +# ------------------------------ +AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT], +[ + AC_CACHE_CHECK([for unsigned long long int], + [ac_cv_type_unsigned_long_long_int], + [ac_cv_type_unsigned_long_long_int=yes + if test "x${ac_cv_prog_cc_c99-no}" = xno; then + AC_LINK_IFELSE( + [_AC_TYPE_LONG_LONG_SNIPPET], + [], + [ac_cv_type_unsigned_long_long_int=no]) + fi]) + if test $ac_cv_type_unsigned_long_long_int = yes; then + AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], [1], + [Define to 1 if the system has the type `unsigned long long int'.]) + fi +]) + + +# AC_TYPE_MBSTATE_T +# ----------------- +AC_DEFUN([AC_TYPE_MBSTATE_T], + [AC_CACHE_CHECK([for mbstate_t], ac_cv_type_mbstate_t, + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [AC_INCLUDES_DEFAULT +# include <wchar.h>], + [mbstate_t x; return sizeof x;])], + [ac_cv_type_mbstate_t=yes], + [ac_cv_type_mbstate_t=no])]) + if test $ac_cv_type_mbstate_t = yes; then + AC_DEFINE([HAVE_MBSTATE_T], 1, + [Define to 1 if <wchar.h> declares mbstate_t.]) + else + AC_DEFINE([mbstate_t], int, + [Define to a type if <wchar.h> does not define.]) + fi]) + + +# AC_TYPE_UID_T +# ------------- +# FIXME: Rewrite using AC_CHECK_TYPE. +AN_IDENTIFIER([gid_t], [AC_TYPE_UID_T]) +AN_IDENTIFIER([uid_t], [AC_TYPE_UID_T]) +AC_DEFUN([AC_TYPE_UID_T], +[AC_CACHE_CHECK(for uid_t in sys/types.h, ac_cv_type_uid_t, +[AC_EGREP_HEADER(uid_t, sys/types.h, + ac_cv_type_uid_t=yes, ac_cv_type_uid_t=no)]) +if test $ac_cv_type_uid_t = no; then + AC_DEFINE(uid_t, int, [Define to `int' if <sys/types.h> doesn't define.]) + AC_DEFINE(gid_t, int, [Define to `int' if <sys/types.h> doesn't define.]) +fi +]) + + +AN_IDENTIFIER([size_t], [AC_TYPE_SIZE_T]) +AC_DEFUN([AC_TYPE_SIZE_T], [AC_CHECK_TYPE(size_t, unsigned int)]) + +AN_IDENTIFIER([ssize_t], [AC_TYPE_SSIZE_T]) +AC_DEFUN([AC_TYPE_SSIZE_T], [AC_CHECK_TYPE(ssize_t, int)]) + +AN_IDENTIFIER([pid_t], [AC_TYPE_PID_T]) +AC_DEFUN([AC_TYPE_PID_T], [AC_CHECK_TYPE(pid_t, int)]) + +AN_IDENTIFIER([off_t], [AC_TYPE_OFF_T]) +AC_DEFUN([AC_TYPE_OFF_T], [AC_CHECK_TYPE(off_t, long int)]) + +AN_IDENTIFIER([mode_t], [AC_TYPE_MODE_T]) +AC_DEFUN([AC_TYPE_MODE_T], [AC_CHECK_TYPE(mode_t, int)]) + +AN_IDENTIFIER([int8_t], [AC_TYPE_INT8_T]) +AN_IDENTIFIER([int16_t], [AC_TYPE_INT16_T]) +AN_IDENTIFIER([int32_t], [AC_TYPE_INT32_T]) +AN_IDENTIFIER([int64_t], [AC_TYPE_INT64_T]) +AN_IDENTIFIER([uint8_t], [AC_TYPE_UINT8_T]) +AN_IDENTIFIER([uint16_t], [AC_TYPE_UINT16_T]) +AN_IDENTIFIER([uint32_t], [AC_TYPE_UINT32_T]) +AN_IDENTIFIER([uint64_t], [AC_TYPE_UINT64_T]) +AC_DEFUN([AC_TYPE_INT8_T], [_AC_TYPE_INT(8)]) +AC_DEFUN([AC_TYPE_INT16_T], [_AC_TYPE_INT(16)]) +AC_DEFUN([AC_TYPE_INT32_T], [_AC_TYPE_INT(32)]) +AC_DEFUN([AC_TYPE_INT64_T], [_AC_TYPE_INT(64)]) +AC_DEFUN([AC_TYPE_UINT8_T], [_AC_TYPE_UNSIGNED_INT(8)]) +AC_DEFUN([AC_TYPE_UINT16_T], [_AC_TYPE_UNSIGNED_INT(16)]) +AC_DEFUN([AC_TYPE_UINT32_T], [_AC_TYPE_UNSIGNED_INT(32)]) +AC_DEFUN([AC_TYPE_UINT64_T], [_AC_TYPE_UNSIGNED_INT(64)]) + +# _AC_TYPE_INT_BODY +# ----------------- +# Shell function body for _AC_TYPE_INT. +m4_define([_AC_TYPE_INT_BODY], +[ AS_LINENO_PUSH([$[]1]) + AC_CACHE_CHECK([for int$[]2_t], [$[]3], + [AS_VAR_SET([$[]3], [no]) + # Order is important - never check a type that is potentially smaller + # than half of the expected target width. + for ac_type in int$[]2_t 'int' 'long int' \ + 'long long int' 'short int' 'signed char'; do + AC_COMPILE_IFELSE( + [AC_LANG_BOOL_COMPILE_TRY( + [AC_INCLUDES_DEFAULT + enum { N = $[]2 / 2 - 1 };], + [0 < ($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 1)])], + [AC_COMPILE_IFELSE( + [AC_LANG_BOOL_COMPILE_TRY( + [AC_INCLUDES_DEFAULT + enum { N = $[]2 / 2 - 1 };], + [($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 1) + < ($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 2)])], + [], + [AS_CASE([$ac_type], [int$[]2_t], + [AS_VAR_SET([$[]3], [yes])], + [AS_VAR_SET([$[]3], [$ac_type])])])]) + AS_VAR_IF([$[]3], [no], [], [break]) + done]) + AS_LINENO_POP +])# _AC_TYPE_INT_BODY + +# _AC_TYPE_INT(NBITS) +# ------------------- +# Set a variable ac_cv_c_intNBITS_t to `yes' if intNBITS_t is available, +# `no' if it is not and no replacement types could be found, and a C type +# if it is not available but a replacement signed integer type of width +# exactly NBITS bits was found. In the third case, intNBITS_t is AC_DEFINEd +# to type, as well. +AC_DEFUN([_AC_TYPE_INT], +[AC_REQUIRE_SHELL_FN([ac_fn_c_find_intX_t], + [AS_FUNCTION_DESCRIBE([ac_fn_c_find_intX_t], [LINENO BITS VAR], + [Finds a signed integer type with width BITS, setting cache variable VAR + accordingly.])], + [$0_BODY])]dnl +[ac_fn_c_find_intX_t "$LINENO" "$1" "ac_cv_c_int$1_t" +case $ac_cv_c_int$1_t in #( + no|yes) ;; #( + *) + AC_DEFINE_UNQUOTED([int$1_t], [$ac_cv_c_int$1_t], + [Define to the type of a signed integer type of width exactly $1 bits + if such a type exists and the standard includes do not define it.]);; +esac +])# _AC_TYPE_INT + +# _AC_TYPE_UNSIGNED_INT_BODY +# -------------------------- +# Shell function body for _AC_TYPE_UNSIGNED_INT. +m4_define([_AC_TYPE_UNSIGNED_INT_BODY], +[ AS_LINENO_PUSH([$[]1]) + AC_CACHE_CHECK([for uint$[]2_t], $[]3, + [AS_VAR_SET([$[]3], [no]) + # Order is important - never check a type that is potentially smaller + # than half of the expected target width. + for ac_type in uint$[]2_t 'unsigned int' 'unsigned long int' \ + 'unsigned long long int' 'unsigned short int' 'unsigned char'; do + AC_COMPILE_IFELSE( + [AC_LANG_BOOL_COMPILE_TRY( + [AC_INCLUDES_DEFAULT], + [(($ac_type) -1 >> ($[]2 / 2 - 1)) >> ($[]2 / 2 - 1) == 3])], + [AS_CASE([$ac_type], [uint$[]2_t], + [AS_VAR_SET([$[]3], [yes])], + [AS_VAR_SET([$[]3], [$ac_type])])]) + AS_VAR_IF([$[]3], [no], [], [break]) + done]) + AS_LINENO_POP +])# _AC_TYPE_UNSIGNED_INT_BODY + + +# _AC_TYPE_UNSIGNED_INT(NBITS) +# ---------------------------- +# Set a variable ac_cv_c_uintNBITS_t to `yes' if uintNBITS_t is available, +# `no' if it is not and no replacement types could be found, and a C type +# if it is not available but a replacement unsigned integer type of width +# exactly NBITS bits was found. In the third case, uintNBITS_t is AC_DEFINEd +# to type, as well. +AC_DEFUN([_AC_TYPE_UNSIGNED_INT], +[AC_REQUIRE_SHELL_FN([ac_fn_c_find_uintX_t], + [AS_FUNCTION_DESCRIBE([ac_fn_c_find_uintX_t], [LINENO BITS VAR], + [Finds an unsigned integer type with width BITS, setting cache variable VAR + accordingly.])], + [$0_BODY])]dnl +[ac_fn_c_find_uintX_t "$LINENO" "$1" "ac_cv_c_uint$1_t" +case $ac_cv_c_uint$1_t in #( + no|yes) ;; #( + *) + m4_bmatch([$1], [^\(8\|32\|64\)$], + [AC_DEFINE([_UINT$1_T], 1, + [Define for Solaris 2.5.1 so the uint$1_t typedef from + <sys/synch.h>, <pthread.h>, or <semaphore.h> is not used. + If the typedef were allowed, the #define below would cause a + syntax error.])]) + AC_DEFINE_UNQUOTED([uint$1_t], [$ac_cv_c_uint$1_t], + [Define to the type of an unsigned integer type of width exactly $1 bits + if such a type exists and the standard includes do not define it.]);; + esac +])# _AC_TYPE_UNSIGNED_INT + +# AC_TYPE_SIGNAL +# -------------- +# Note that identifiers starting with SIG are reserved by ANSI C. +# C89 requires signal handlers to return void; only K&R returned int; +# modern code does not need to worry about using this macro (not to +# mention that sigaction is better than signal). +AU_DEFUN([AC_TYPE_SIGNAL], +[AC_CACHE_CHECK([return type of signal handlers], ac_cv_type_signal, +[AC_COMPILE_IFELSE( +[AC_LANG_PROGRAM([#include <sys/types.h> +#include <signal.h> +], + [return *(signal (0, 0)) (0) == 1;])], + [ac_cv_type_signal=int], + [ac_cv_type_signal=void])]) +AC_DEFINE_UNQUOTED(RETSIGTYPE, $ac_cv_type_signal, + [Define as the return type of signal handlers + (`int' or `void').]) +], [your code may safely assume C89 semantics that RETSIGTYPE is void. +Remove this warning and the `AC_CACHE_CHECK' when you adjust the code.]) + + +## ------------------------ ## +## Checking size of types. ## +## ------------------------ ## + +# ---------------- # +# Generic checks. # +# ---------------- # + + +# AC_CHECK_SIZEOF(TYPE, [IGNORED], [INCLUDES = DEFAULT-INCLUDES]) +# --------------------------------------------------------------- +AC_DEFUN([AC_CHECK_SIZEOF], +[AS_LITERAL_IF(m4_translit([[$1]], [*], [p]), [], + [m4_fatal([$0: requires literal arguments])])]dnl +[# The cast to long int works around a bug in the HP C Compiler +# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects +# declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'. +# This bug is HP SR number 8606223364. +_AC_CACHE_CHECK_INT([size of $1], [AS_TR_SH([ac_cv_sizeof_$1])], + [(long int) (sizeof ($1))], + [AC_INCLUDES_DEFAULT([$3])], + [if test "$AS_TR_SH([ac_cv_type_$1])" = yes; then + AC_MSG_FAILURE([cannot compute sizeof ($1)], 77) + else + AS_TR_SH([ac_cv_sizeof_$1])=0 + fi]) + +AC_DEFINE_UNQUOTED(AS_TR_CPP(sizeof_$1), $AS_TR_SH([ac_cv_sizeof_$1]), + [The size of `$1', as computed by sizeof.]) +])# AC_CHECK_SIZEOF + + +# AC_CHECK_ALIGNOF(TYPE, [INCLUDES = DEFAULT-INCLUDES]) +# ----------------------------------------------------- +# TYPE can include braces and semicolon, which AS_TR_CPP and AS_TR_SH +# (correctly) recognize as potential shell metacharacters. So we +# have to flatten problematic characters ourselves to guarantee that +# AC_DEFINE_UNQUOTED will see a literal. +AC_DEFUN([AC_CHECK_ALIGNOF], +[m4_if(m4_index(m4_translit([[$1]], [`\"], [$]), [$]), [-1], [], + [m4_fatal([$0: requires literal arguments])])]dnl +[_$0([$1], [$2], m4_translit([[$1]], [{;}], [___]))]) + +m4_define([_AC_CHECK_ALIGNOF], +[# The cast to long int works around a bug in the HP C Compiler, +# see AC_CHECK_SIZEOF for more information. +_AC_CACHE_CHECK_INT([alignment of $1], [AS_TR_SH([ac_cv_alignof_$3])], + [(long int) offsetof (ac__type_alignof_, y)], + [AC_INCLUDES_DEFAULT([$2]) +#ifndef offsetof +# define offsetof(type, member) ((char *) &((type *) 0)->member - (char *) 0) +#endif +typedef struct { char x; $1 y; } ac__type_alignof_;], + [if test "$AS_TR_SH([ac_cv_type_$3])" = yes; then + AC_MSG_FAILURE([cannot compute alignment of $1], 77) + else + AS_TR_SH([ac_cv_alignof_$3])=0 + fi]) + +AC_DEFINE_UNQUOTED(AS_TR_CPP(alignof_$3), $AS_TR_SH([ac_cv_alignof_$3]), + [The normal alignment of `$1', in bytes.]) +])# AC_CHECK_ALIGNOF + + +# AU::AC_INT_16_BITS +# ------------------ +# What a great name :) +AU_DEFUN([AC_INT_16_BITS], +[AC_CHECK_SIZEOF([int]) +test $ac_cv_sizeof_int = 2 && + AC_DEFINE(INT_16_BITS, 1, + [Define to 1 if `sizeof (int)' = 2. Obsolete, use `SIZEOF_INT'.]) +], [your code should no longer depend upon `INT_16_BITS', but upon +`SIZEOF_INT == 2'. Remove this warning and the `AC_DEFINE' when you +adjust the code.]) + + +# AU::AC_LONG_64_BITS +# ------------------- +AU_DEFUN([AC_LONG_64_BITS], +[AC_CHECK_SIZEOF([long int]) +test $ac_cv_sizeof_long_int = 8 && + AC_DEFINE(LONG_64_BITS, 1, + [Define to 1 if `sizeof (long int)' = 8. Obsolete, use + `SIZEOF_LONG_INT'.]) +], [your code should no longer depend upon `LONG_64_BITS', but upon +`SIZEOF_LONG_INT == 8'. Remove this warning and the `AC_DEFINE' when +you adjust the code.]) + + + +## -------------------------- ## +## Generic structure checks. ## +## -------------------------- ## + + +# ---------------- # +# Generic checks. # +# ---------------- # + +# _AC_CHECK_MEMBER_BODY +# --------------------- +# Shell function body for AC_CHECK_MEMBER. +m4_define([_AC_CHECK_MEMBER_BODY], +[ AS_LINENO_PUSH([$[]1]) + AC_CACHE_CHECK([for $[]2.$[]3], [$[]4], + [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$[]5], +[static $[]2 ac_aggr; +if (ac_aggr.$[]3) +return 0;])], + [AS_VAR_SET([$[]4], [yes])], + [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$[]5], +[static $[]2 ac_aggr; +if (sizeof ac_aggr.$[]3) +return 0;])], + [AS_VAR_SET([$[]4], [yes])], + [AS_VAR_SET([$[]4], [no])])])]) + AS_LINENO_POP +])dnl + +# AC_CHECK_MEMBER(AGGREGATE.MEMBER, +# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], +# [INCLUDES = DEFAULT-INCLUDES]) +# --------------------------------------------------------- +# AGGREGATE.MEMBER is for instance `struct passwd.pw_gecos', shell +# variables are not a valid argument. +AC_DEFUN([AC_CHECK_MEMBER], +[AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_check_member], + [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_check_member], + [LINENO AGGR MEMBER VAR INCLUDES], + [Tries to find if the field MEMBER exists in type AGGR, after including + INCLUDES, setting cache variable VAR accordingly.])], + [_$0_BODY])]dnl +[AS_LITERAL_IF([$1], [], [m4_fatal([$0: requires literal arguments])])]dnl +[m4_if(m4_index([$1], [.]), [-1], + [m4_fatal([$0: Did not see any dot in `$1'])])]dnl +[AS_VAR_PUSHDEF([ac_Member], [ac_cv_member_$1])]dnl +[ac_fn_[]_AC_LANG_ABBREV[]_check_member "$LINENO" ]dnl +[m4_bpatsubst([$1], [^\([^.]*\)\.\(.*\)], ["\1" "\2"]) "ac_Member" ]dnl +["AS_ESCAPE([AC_INCLUDES_DEFAULT([$4])], [""])" +AS_VAR_IF([ac_Member], [yes], [$2], [$3]) +AS_VAR_POPDEF([ac_Member])dnl +])# AC_CHECK_MEMBER + + +# _AC_CHECK_MEMBERS(AGGREGATE.MEMBER) +# ----------------------------------- +# Helper to AC_CHECK_MEMBERS, which generates two of the four +# arguments to AC_CHECK_MEMBER that are based on AGGREGATE and MEMBER. +m4_define([_AC_CHECK_MEMBERS], +[[$1], [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_$1]), [1], + [Define to 1 if `]m4_bpatsubst([$1], + [^\([^.]*\)\.\(.*\)], [[\2' is a member of `\1]])['.])]]) + +# AC_CHECK_MEMBERS([AGGREGATE.MEMBER, ...], +# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], +# [INCLUDES = DEFAULT-INCLUDES]) +# ---------------------------------------------------------- +# The first argument is an m4 list. +AC_DEFUN([AC_CHECK_MEMBERS], +[m4_map_args_sep([AC_CHECK_MEMBER(_$0(], [)[ +$2], [$3], [$4])], [], $1)]) + + + +# ------------------------------------------------------- # +# Members that ought to be tested with AC_CHECK_MEMBERS. # +# ------------------------------------------------------- # + +AN_IDENTIFIER([st_blksize], [AC_CHECK_MEMBERS([struct stat.st_blksize])]) +AN_IDENTIFIER([st_rdev], [AC_CHECK_MEMBERS([struct stat.st_rdev])]) + + +# Alphabetic order, please. + +# _AC_STRUCT_DIRENT(MEMBER) +# ------------------------- +AC_DEFUN([_AC_STRUCT_DIRENT], +[ + AC_REQUIRE([AC_HEADER_DIRENT]) + AC_CHECK_MEMBERS([struct dirent.$1], [], [], + [[ +#include <sys/types.h> +#ifdef HAVE_DIRENT_H +# include <dirent.h> +#else +# define dirent direct +# ifdef HAVE_SYS_NDIR_H +# include <sys/ndir.h> +# endif +# ifdef HAVE_SYS_DIR_H +# include <sys/dir.h> +# endif +# ifdef HAVE_NDIR_H +# include <ndir.h> +# endif +#endif + ]]) +]) + +# AC_STRUCT_DIRENT_D_INO +# ---------------------- +AC_DEFUN([AC_STRUCT_DIRENT_D_INO], [_AC_STRUCT_DIRENT([d_ino])]) + +# AC_STRUCT_DIRENT_D_TYPE +# ----------------------- +AC_DEFUN([AC_STRUCT_DIRENT_D_TYPE], [_AC_STRUCT_DIRENT([d_type])]) + + +# AC_STRUCT_ST_BLKSIZE +# -------------------- +AU_DEFUN([AC_STRUCT_ST_BLKSIZE], +[AC_CHECK_MEMBERS([struct stat.st_blksize], + [AC_DEFINE(HAVE_ST_BLKSIZE, 1, + [Define to 1 if your `struct stat' has + `st_blksize'. Deprecated, use + `HAVE_STRUCT_STAT_ST_BLKSIZE' instead.])]) +], [your code should no longer depend upon `HAVE_ST_BLKSIZE', but +`HAVE_STRUCT_STAT_ST_BLKSIZE'. Remove this warning and +the `AC_DEFINE' when you adjust the code.])# AC_STRUCT_ST_BLKSIZE + + +# AC_STRUCT_ST_BLOCKS +# ------------------- +# If `struct stat' contains an `st_blocks' member, define +# HAVE_STRUCT_STAT_ST_BLOCKS. Otherwise, add `fileblocks.o' to the +# output variable LIBOBJS. We still define HAVE_ST_BLOCKS for backward +# compatibility. In the future, we will activate specializations for +# this macro, so don't obsolete it right now. +# +# AC_OBSOLETE([$0], [; replace it with +# AC_CHECK_MEMBERS([struct stat.st_blocks], +# [AC_LIBOBJ([fileblocks])]) +# Please note that it will define `HAVE_STRUCT_STAT_ST_BLOCKS', +# and not `HAVE_ST_BLOCKS'.])dnl +# +AN_IDENTIFIER([st_blocks], [AC_STRUCT_ST_BLOCKS]) +AC_DEFUN([AC_STRUCT_ST_BLOCKS], +[AC_CHECK_MEMBERS([struct stat.st_blocks], + [AC_DEFINE(HAVE_ST_BLOCKS, 1, + [Define to 1 if your `struct stat' has + `st_blocks'. Deprecated, use + `HAVE_STRUCT_STAT_ST_BLOCKS' instead.])], + [AC_LIBOBJ([fileblocks])]) +])# AC_STRUCT_ST_BLOCKS + + +# AC_STRUCT_ST_RDEV +# ----------------- +AU_DEFUN([AC_STRUCT_ST_RDEV], +[AC_CHECK_MEMBERS([struct stat.st_rdev], + [AC_DEFINE(HAVE_ST_RDEV, 1, + [Define to 1 if your `struct stat' has `st_rdev'. + Deprecated, use `HAVE_STRUCT_STAT_ST_RDEV' + instead.])]) +], [your code should no longer depend upon `HAVE_ST_RDEV', but +`HAVE_STRUCT_STAT_ST_RDEV'. Remove this warning and +the `AC_DEFINE' when you adjust the code.])# AC_STRUCT_ST_RDEV + + +# AC_STRUCT_TM +# ------------ +# FIXME: This macro is badly named, it should be AC_CHECK_TYPE_STRUCT_TM. +# Or something else, but what? AC_CHECK_TYPE_STRUCT_TM_IN_SYS_TIME? +AC_DEFUN([AC_STRUCT_TM], +[AC_CACHE_CHECK([whether struct tm is in sys/time.h or time.h], + ac_cv_struct_tm, +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/types.h> +#include <time.h> +], + [struct tm tm; + int *p = &tm.tm_sec; + return !p;])], + [ac_cv_struct_tm=time.h], + [ac_cv_struct_tm=sys/time.h])]) +if test $ac_cv_struct_tm = sys/time.h; then + AC_DEFINE(TM_IN_SYS_TIME, 1, + [Define to 1 if your <sys/time.h> declares `struct tm'.]) +fi +])# AC_STRUCT_TM + + +# AC_STRUCT_TIMEZONE +# ------------------ +# Figure out how to get the current timezone. If `struct tm' has a +# `tm_zone' member, define `HAVE_TM_ZONE'. Otherwise, if the +# external array `tzname' is found, define `HAVE_TZNAME'. +AN_IDENTIFIER([tm_zone], [AC_STRUCT_TIMEZONE]) +AC_DEFUN([AC_STRUCT_TIMEZONE], +[AC_REQUIRE([AC_STRUCT_TM])dnl +AC_CHECK_MEMBERS([struct tm.tm_zone],,,[#include <sys/types.h> +#include <$ac_cv_struct_tm> +]) +if test "$ac_cv_member_struct_tm_tm_zone" = yes; then + AC_DEFINE(HAVE_TM_ZONE, 1, + [Define to 1 if your `struct tm' has `tm_zone'. Deprecated, use + `HAVE_STRUCT_TM_TM_ZONE' instead.]) +else + AC_CHECK_DECLS([tzname], , , [#include <time.h>]) + AC_CACHE_CHECK(for tzname, ac_cv_var_tzname, +[AC_LINK_IFELSE([AC_LANG_PROGRAM( +[[#include <time.h> +#if !HAVE_DECL_TZNAME +extern char *tzname[]; +#endif +]], +[[return tzname[0][0];]])], + [ac_cv_var_tzname=yes], + [ac_cv_var_tzname=no])]) + if test $ac_cv_var_tzname = yes; then + AC_DEFINE(HAVE_TZNAME, 1, + [Define to 1 if you don't have `tm_zone' but do have the external + array `tzname'.]) + fi +fi +])# AC_STRUCT_TIMEZONE |