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dnl ---------------------------------------------------------------------------
dnl
dnl Macros for configure.in for wxWindows by Robert Roebling, Phil Blecker,
dnl Vadim Zeitlin and Ron Lee
dnl
dnl This script is under the wxWindows licence.
dnl
dnl Version: $Id$
dnl ---------------------------------------------------------------------------
dnl ===========================================================================
dnl Objective-C(++) related macros
dnl ===========================================================================
m4_define([AC_WX_LANG_OBJECTIVEC],
[AC_LANG(C)
ac_ext=m
])
m4_define([AC_WX_LANG_OBJECTIVECPLUSPLUS],
[AC_LANG(C++)
ac_ext=mm
])
dnl ===========================================================================
dnl macros to find the a file in the list of include/lib paths
dnl ===========================================================================
dnl ---------------------------------------------------------------------------
dnl call WX_PATH_FIND_INCLUDES(search path, header name), sets ac_find_includes
dnl to the full name of the file that was found or leaves it empty if not found
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_PATH_FIND_INCLUDES],
[
ac_find_includes=
for ac_dir in $1 /usr/include;
do
if test -f "$ac_dir/$2"; then
ac_find_includes=$ac_dir
break
fi
done
])
dnl ---------------------------------------------------------------------------
dnl call WX_PATH_FIND_LIBRARIES(search path, lib name), sets ac_find_libraries
dnl to the full name of the file that was found or leaves it empty if not found
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_PATH_FIND_LIBRARIES],
[
ac_find_libraries=
for ac_dir in $1;
do
for ac_extension in a so sl dylib dll.a; do
if test -f "$ac_dir/lib$2.$ac_extension"; then
ac_find_libraries=$ac_dir
break 2
fi
done
done
])
dnl ---------------------------------------------------------------------------
dnl return list of standard library paths
dnl ---------------------------------------------------------------------------
dnl return all default locations:
dnl - /usr/lib: standard
dnl - /usr/lib32: n32 ABI on IRIX
dnl - /usr/lib64: n64 ABI on IRIX
dnl - /usr/lib/64: 64 bit ABI on Solaris and Linux x86-64
dnl
dnl NB: if any of directories in the list is not a subdir of /usr, code setting
dnl wx_cv_std_libpath needs to be updated
AC_DEFUN([WX_STD_LIBPATH], [/usr/lib /usr/lib32 /usr/lib/64 /usr/lib64])
dnl ---------------------------------------------------------------------------
dnl Path to include, already defined
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_INCLUDE_PATH_EXIST],
[
dnl never add -I/usr/include to the CPPFLAGS
if test "x$1" = "x/usr/include"; then
ac_path_to_include=""
else
echo "$2" | grep "\-I$1" > /dev/null
result=$?
if test $result = 0; then
ac_path_to_include=""
else
ac_path_to_include=" -I$1"
fi
fi
])
dnl ---------------------------------------------------------------------------
dnl Usage: WX_LINK_PATH_EXIST(path, libpath)
dnl
dnl Set ac_path_to_link to nothing if path is already in libpath of to -Lpath
dnl if it is not, so that libpath can be set to "$libpath$ac_path_to_link"
dnl after calling this function
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_LINK_PATH_EXIST],
[
dnl never add -L/usr/libXXX explicitely to libpath
if test "$1" = "default location"; then
ac_path_to_link=""
else
echo "$2" | grep "\-L$1" > /dev/null
result=$?
if test $result = 0; then
ac_path_to_link=""
else
ac_path_to_link=" -L$1"
fi
fi
])
dnl ===========================================================================
dnl C++ features test
dnl ===========================================================================
dnl ---------------------------------------------------------------------------
dnl WX_CPP_NEW_HEADERS checks whether the compiler has "new" <iostream> header
dnl or only the old <iostream.h> one - it may be generally assumed that if
dnl <iostream> exists, the other "new" headers (without .h) exist too.
dnl
dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false)
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_CPP_NEW_HEADERS],
[
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_CHECK_HEADER(iostream,,, [ ])
if test "$ac_cv_header_iostream" = "yes" ; then
ifelse([$1], , :, [$1])
else
ifelse([$2], , :, [$2])
fi
AC_LANG_RESTORE
])
dnl ---------------------------------------------------------------------------
dnl WX_CPP_BOOL checks whether the C++ compiler has a built in bool type
dnl
dnl call WX_CPP_BOOL - will define HAVE_BOOL if the compiler supports bool
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_CPP_BOOL],
[
AC_CACHE_CHECK([if C++ compiler supports bool], wx_cv_cpp_bool,
[
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE(
[
],
[
bool b = true;
return 0;
],
[
wx_cv_cpp_bool=yes
],
[
wx_cv_cpp_bool=no
]
)
AC_LANG_RESTORE
])
if test "$wx_cv_cpp_bool" = "yes"; then
AC_DEFINE(HAVE_BOOL)
fi
])
dnl ---------------------------------------------------------------------------
dnl WX_CPP_EXPLICIT checks whether the C++ compiler support the explicit
dnl keyword and defines HAVE_EXPLICIT if this is the case
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_CPP_EXPLICIT],
[
AC_CACHE_CHECK([if C++ compiler supports the explicit keyword],
wx_cv_explicit,
[
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
dnl do the test in 2 steps: first check that the compiler knows about the
dnl explicit keyword at all and then verify that it really honours it
AC_TRY_COMPILE(
[
class Foo { public: explicit Foo(int) {} };
],
[
return 0;
],
[
AC_TRY_COMPILE(
[
class Foo { public: explicit Foo(int) {} };
static void TakeFoo(const Foo& foo) { }
],
[
TakeFoo(17);
return 0;
],
wx_cv_explicit=no,
wx_cv_explicit=yes
)
],
wx_cv_explicit=no
)
AC_LANG_RESTORE
])
if test "$wx_cv_explicit" = "yes"; then
AC_DEFINE(HAVE_EXPLICIT)
fi
])
dnl ---------------------------------------------------------------------------
dnl WX_CHECK_FUNCS(FUNCTIONS...,
dnl [ACTION-IF-FOUND],
dnl [ACTION-IF-NOT-FOUND],
dnl [EXTRA-DEFINES-AND-INCLUDES],
dnl [EXTRA-TEST-CODE])
dnl
dnl Checks that the functions listed in FUNCTIONS exist in the headers and the
dnl libs. For each function, if it is found then defines 'HAVE_FUNCTION' and
dnl executes ACTION-IF-FOUND, otherwise executes ACTION-IF-NOT-FOUND.
dnl
dnl The code from EXTRA-DEFINES-AND-INCLUDES is inserted into the test before
dnl the default headers are included, and EXTRA-TEST-CODE is inserted into
dnl the main() function after the default test for existence.
dnl
dnl Examples:
dnl # the simple case
dnl WX_CHECK_FUNCS(stat)
dnl # use break to finish the loop early
dnl WX_CHECK_FUNCS(mkstemp mktemp, break)
dnl # extra defines
dnl WX_CHECK_FUNCS(strtok_r, [], [], [#define _RREENTRANT])
dnl # extra includes
dnl WX_CHECK_FUNCS(swprintf, [], [], [#include <wchar.h>])
dnl # checking the signature with extra test code
dnl WX_CHECK_FUNCS(gettimeofday, [], [], [#include <sys/time.h>]
dnl [struct timeval tv; struct timezone tz; gettimeofday(&tv, &tz)])
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_CHECK_FUNCS],
[
for wx_func in $1
do
AC_CACHE_CHECK(
[for $wx_func],
[wx_cv_func_$wx_func],
[
AC_LINK_IFELSE(
[
AC_LANG_PROGRAM(
[
$4
AC_INCLUDES_DEFAULT
],
[
#ifndef $wx_func
&$wx_func;
#endif
$5
])
],
[eval wx_cv_func_$wx_func=yes],
[eval wx_cv_func_$wx_func=no])
])
if eval test \$wx_cv_func_$wx_func = yes
then
AC_DEFINE_UNQUOTED([HAVE_`echo $wx_func | tr 'a-z' 'A-Z'`])
$2
else
:
$3
fi
done
])
dnl ---------------------------------------------------------------------------
dnl a slightly better AC_C_BIGENDIAN macro which allows cross-compiling
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_C_BIGENDIAN],
[AC_CACHE_CHECK([whether byte ordering is bigendian], ac_cv_c_bigendian,
[ac_cv_c_bigendian=unknown
# See if sys/param.h defines the BYTE_ORDER macro.
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/param.h>], [
#if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
bogus endian macros
#endif], [# It does; now see whether it defined to BIG_ENDIAN or not.
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/param.h>], [
#if BYTE_ORDER != BIG_ENDIAN
not big endian
#endif], ac_cv_c_bigendian=yes, ac_cv_c_bigendian=no)])
if test $ac_cv_c_bigendian = unknown; then
AC_TRY_RUN([main () {
/* Are we little or big endian? From Harbison&Steele. */
union
{
long l;
char c[sizeof (long)];
} u;
u.l = 1;
exit (u.c[sizeof (long) - 1] == 1);
}], [ac_cv_c_bigendian=no], [ac_cv_c_bigendian=yes], [ac_cv_c_bigendian=unknown])
fi])
if test $ac_cv_c_bigendian = unknown; then
AC_MSG_WARN([Assuming little-endian target machine - this may be overriden by adding the line "ac_cv_c_bigendian=${ac_cv_c_bigendian='yes'}" to config.cache file])
fi
if test $ac_cv_c_bigendian = yes; then
AC_DEFINE(WORDS_BIGENDIAN)
fi
])
dnl ---------------------------------------------------------------------------
dnl override AC_ARG_ENABLE/WITH to cache the results in .cache file
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_ARG_CACHE_INIT],
[
wx_arg_cache_file="configarg.cache"
echo "loading argument cache $wx_arg_cache_file"
rm -f ${wx_arg_cache_file}.tmp
touch ${wx_arg_cache_file}.tmp
touch ${wx_arg_cache_file}
])
AC_DEFUN([WX_ARG_CACHE_FLUSH],
[
echo "saving argument cache $wx_arg_cache_file"
mv ${wx_arg_cache_file}.tmp ${wx_arg_cache_file}
])
dnl this macro checks for a three-valued command line --with argument:
dnl possible arguments are 'yes', 'no', 'sys', or 'builtin'
dnl usage: WX_ARG_SYS_WITH(option, helpmessage, variable-name)
AC_DEFUN([WX_ARG_SYS_WITH],
[
AC_MSG_CHECKING([for --with-$1])
no_cache=0
AC_ARG_WITH($1, [$2],
[
if test "$withval" = yes; then
ac_cv_use_$1='$3=yes'
elif test "$withval" = no; then
ac_cv_use_$1='$3=no'
elif test "$withval" = sys; then
ac_cv_use_$1='$3=sys'
elif test "$withval" = builtin; then
ac_cv_use_$1='$3=builtin'
else
AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
fi
],
[
LINE=`grep "^$3=" ${wx_arg_cache_file}`
if test "x$LINE" != x ; then
eval "DEFAULT_$LINE"
else
no_cache=1
fi
ac_cv_use_$1='$3='$DEFAULT_$3
])
eval "$ac_cv_use_$1"
if test "$no_cache" != 1; then
echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
fi
if test "$$3" = yes; then
AC_MSG_RESULT(yes)
elif test "$$3" = no; then
AC_MSG_RESULT(no)
elif test "$$3" = sys; then
AC_MSG_RESULT([system version])
elif test "$$3" = builtin; then
AC_MSG_RESULT([builtin version])
else
AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
fi
])
dnl this macro checks for a command line argument and caches the result
dnl usage: WX_ARG_WITH(option, helpmessage, variable-name, [withstring])
AC_DEFUN([WX_ARG_WITH],
[
withstring=$4
AC_MSG_CHECKING([for --${withstring:-with}-$1])
no_cache=0
AC_ARG_WITH($1, [$2],
[
if test "$withval" = yes; then
ac_cv_use_$1='$3=yes'
else
ac_cv_use_$1='$3=no'
fi
],
[
LINE=`grep "^$3=" ${wx_arg_cache_file}`
if test "x$LINE" != x ; then
eval "DEFAULT_$LINE"
else
no_cache=1
fi
ac_cv_use_$1='$3='$DEFAULT_$3
])
eval "$ac_cv_use_$1"
if test "$no_cache" != 1; then
echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
fi
if test "$$3" = yes; then
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
])
dnl like WX_ARG_WITH but uses AC_ARG_ENABLE instead of AC_ARG_WITH
dnl usage: WX_ARG_ENABLE(option, helpmessage, variable-name, enablestring)
dnl
dnl enablestring is a hack and allows to show "checking for --disable-foo"
dnl message when running configure instead of the default "checking for
dnl --enable-foo" one whih is useful for the options enabled by default
AC_DEFUN([WX_ARG_ENABLE],
[
enablestring=$4
AC_MSG_CHECKING([for --${enablestring:-enable}-$1])
no_cache=0
AC_ARG_ENABLE($1, [$2],
[
if test "$enableval" = yes; then
ac_cv_use_$1='$3=yes'
else
ac_cv_use_$1='$3=no'
fi
],
[
LINE=`grep "^$3=" ${wx_arg_cache_file}`
if test "x$LINE" != x ; then
eval "DEFAULT_$LINE"
else
no_cache=1
fi
ac_cv_use_$1='$3='$DEFAULT_$3
])
eval "$ac_cv_use_$1"
if test "$no_cache" != 1; then
echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
fi
if test "$$3" = yes; then
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
])
dnl Like WX_ARG_ENABLE but accepts a parameter.
dnl
dnl Usage:
dnl WX_ARG_ENABLE_PARAM(option, helpmessage, variable-name, enablestring)
dnl
dnl Example:
dnl WX_ARG_ENABLE_PARAM(foo, [[ --enable-foo[=bar] use foo]], wxUSE_FOO)
dnl
dnl --enable-foo wxUSE_FOO=yes
dnl --disable-foo wxUSE_FOO=no
dnl --enable-foo=bar wxUSE_FOO=bar
dnl <not given> value from configarg.cache or
dnl wxUSE_FOO=$DEFAULT_wxUSE_FOO
dnl
AC_DEFUN([WX_ARG_ENABLE_PARAM],
[
enablestring=$4
AC_MSG_CHECKING([for --${enablestring:-enable}-$1])
no_cache=0
AC_ARG_ENABLE($1, [$2],
[
wx_cv_use_$1="$3='$enableval'"
],
[
LINE=`grep "^$3=" ${wx_arg_cache_file}`
if test "x$LINE" != x ; then
eval "DEFAULT_$LINE"
else
no_cache=1
fi
wx_cv_use_$1='$3='$DEFAULT_$3
])
eval "$wx_cv_use_$1"
if test "$no_cache" != 1; then
echo $wx_cv_use_$1 >> ${wx_arg_cache_file}.tmp
fi
AC_MSG_RESULT([$$3])
])
dnl ===========================================================================
dnl Linker features test
dnl ===========================================================================
dnl ---------------------------------------------------------------------------
dnl WX_VERSIONED_SYMBOLS checks whether the linker can create versioned
dnl symbols. If it can, sets LDFLAGS_VERSIONING to $CXX flags needed to use
dnl version script file named versionfile
dnl
dnl call WX_VERSIONED_SYMBOLS(versionfile)
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_VERSIONED_SYMBOLS],
[
case "${host}" in
*-*-cygwin* | *-*-mingw* )
dnl although ld does support version script option on these
dnl platforms, it doesn't make much sense to use it under Win32
dnl and, moreover, this breaks linking because of a bug in handling
dnl paths in -Wl,--version-script,path option (if we ever do need
dnl to use it for cygwin/mingw32, keep in mind that replacing last
dnl comma with the equal sign works) so
dnl simply disable it
wx_cv_version_script=no
;;
*)
AC_CACHE_CHECK([if the linker accepts --version-script], wx_cv_version_script,
[
echo "VER_1 { *; };" >conftest.sym
echo "int main() { return 0; }" >conftest.cpp
if AC_TRY_COMMAND([
$CXX -o conftest.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
-Wl,--version-script,conftest.sym >/dev/null 2>conftest.stderr]) ; then
if test -s conftest.stderr ; then
wx_cv_version_script=no
else
wx_cv_version_script=yes
fi
else
wx_cv_version_script=no
fi
dnl There's a problem in some old linkers with --version-script that
dnl can cause linking to fail when you have objects with vtables in
dnl libs 3 deep. This is known to happen in netbsd and openbsd with
dnl ld 2.11.2.
dnl
dnl To test for this we need to make some shared libs and
dnl unfortunately we can't be sure of the right way to do that. If the
dnl first two compiles don't succeed then it looks like the test isn't
dnl working and the result is ignored, but if OTOH the first two
dnl succeed but the third does not then the bug has been detected and
dnl the --version-script flag is dropped.
if test $wx_cv_version_script = yes
then
echo "struct B { virtual ~B() { } }; \
struct D : public B { }; \
void F() { D d; }" > conftest.cpp
if AC_TRY_COMMAND([
$CXX -shared -fPIC -o conftest1.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
-Wl,--version-script,conftest.sym >/dev/null 2>/dev/null]) &&
AC_TRY_COMMAND([
$CXX -shared -fPIC -o conftest2.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
-Wl,--version-script,conftest.sym conftest1.output >/dev/null 2>/dev/null])
then
if AC_TRY_COMMAND([
$CXX -shared -fPIC -o conftest3.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
-Wl,--version-script,conftest.sym conftest2.output conftest1.output >/dev/null 2>/dev/null])
then
wx_cv_version_script=yes
else
wx_cv_version_script=no
fi
fi
fi
rm -f conftest.output conftest.stderr conftest.sym conftest.cpp
rm -f conftest1.output conftest2.output conftest3.output
])
if test $wx_cv_version_script = yes ; then
LDFLAGS_VERSIONING="-Wl,--version-script,$1"
fi
;;
esac
])
dnl ===========================================================================
dnl "3rd party" macros included here because they are not widely available
dnl ===========================================================================
dnl ---------------------------------------------------------------------------
dnl test for availability of iconv()
dnl ---------------------------------------------------------------------------
dnl From Bruno Haible.
AC_DEFUN([AM_ICONV],
[
dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
dnl those with the standalone portable GNU libiconv installed).
AC_ARG_WITH([libiconv-prefix],
[ --with-libiconv-prefix=DIR search for libiconv in DIR/include and DIR/lib], [
for dir in `echo "$withval" | tr : ' '`; do
if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
done
])
AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
am_cv_func_iconv="no, consider installing GNU libiconv"
am_cv_lib_iconv=no
AC_TRY_LINK([#include <stdlib.h>
#include <iconv.h>],
[iconv_t cd = iconv_open("","");
iconv(cd,NULL,NULL,NULL,NULL);
iconv_close(cd);],
am_cv_func_iconv=yes)
if test "$am_cv_func_iconv" != yes; then
am_save_LIBS="$LIBS"
LIBS="$LIBS -liconv"
AC_TRY_LINK([#include <stdlib.h>
#include <iconv.h>],
[iconv_t cd = iconv_open("","");
iconv(cd,NULL,NULL,NULL,NULL);
iconv_close(cd);],
am_cv_lib_iconv=yes
am_cv_func_iconv=yes)
LIBS="$am_save_LIBS"
fi
])
if test "$am_cv_func_iconv" = yes; then
AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
AC_CACHE_CHECK([if iconv needs const], wx_cv_func_iconv_const,
AC_TRY_COMPILE([
#include <stdlib.h>
#include <iconv.h>
extern
#ifdef __cplusplus
"C"
#endif
#if defined(__STDC__) || defined(__cplusplus)
size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
#else
size_t iconv();
#endif
],
[],
wx_cv_func_iconv_const="no",
wx_cv_func_iconv_const="yes"
)
)
iconv_const=
if test "x$wx_cv_func_iconv_const" = "xyes"; then
iconv_const="const"
fi
AC_DEFINE_UNQUOTED(ICONV_CONST, $iconv_const,
[Define as const if the declaration of iconv() needs const.])
fi
LIBICONV=
if test "$am_cv_lib_iconv" = yes; then
LIBICONV="-liconv"
fi
AC_SUBST(LIBICONV)
])
dnl ---------------------------------------------------------------------------
dnl AC_SYS_LARGEFILE (partly based on the code from autoconf 2.5x)
dnl ---------------------------------------------------------------------------
dnl WX_SYS_LARGEFILE_TEST
dnl
dnl NB: original autoconf test was checking if compiler supported 6 bit off_t
dnl arithmetic properly but this failed miserably with gcc under Linux
dnl whereas the system still supports 64 bit files, so now simply check
dnl that off_t is big enough
define(WX_SYS_LARGEFILE_TEST,
[typedef struct {
unsigned int field: sizeof(off_t) == 8;
} wxlf;
])
dnl WX_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR)
define(WX_SYS_LARGEFILE_MACRO_VALUE,
[
AC_CACHE_CHECK([for $1 value needed for large files], [$3],
[
AC_TRY_COMPILE([#define $1 $2
#include <sys/types.h>],
WX_SYS_LARGEFILE_TEST,
[$3=$2],
[$3=no])
]
)
if test "$$3" != no; then
wx_largefile=yes
AC_DEFINE_UNQUOTED([$1], [$$3])
fi
])
dnl AC_SYS_LARGEFILE
dnl ----------------
dnl By default, many hosts won't let programs access large files;
dnl one must use special compiler options to get large-file access to work.
dnl For more details about this brain damage please see:
dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
AC_DEFUN([AC_SYS_LARGEFILE],
[AC_ARG_ENABLE(largefile,
[ --disable-largefile omit support for large files])
if test "$enable_largefile" != no; then
dnl _FILE_OFFSET_BITS==64 is needed for Linux, Solaris, ...
dnl _LARGE_FILES -- for AIX
wx_largefile=no
WX_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64, ac_cv_sys_file_offset_bits)
if test "x$wx_largefile" != "xyes"; then
WX_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, ac_cv_sys_large_files)
fi
AC_MSG_CHECKING(if large file support is available)
if test "x$wx_largefile" = "xyes"; then
AC_DEFINE(HAVE_LARGEFILE_SUPPORT)
fi
AC_MSG_RESULT($wx_largefile)
fi
])
dnl Available from the GNU Autoconf Macro Archive at:
dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_const_cast.html
dnl
AC_DEFUN([AC_CXX_CONST_CAST],
[AC_CACHE_CHECK(whether the compiler supports const_cast<>,
ac_cv_cxx_const_cast,
[AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE(,[int x = 0;const int& y = x;int& z = const_cast<int&>(y);return z;],
ac_cv_cxx_const_cast=yes, ac_cv_cxx_const_cast=no)
AC_LANG_RESTORE
])
if test "$ac_cv_cxx_const_cast" = yes; then
AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>])
fi
])
dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_reinterpret_cast.html
AC_DEFUN([AC_CXX_REINTERPRET_CAST],
[AC_CACHE_CHECK(whether the compiler supports reinterpret_cast<>,
ac_cv_cxx_reinterpret_cast,
[AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <typeinfo>
class Base { public : Base () {} virtual void f () = 0;};
class Derived : public Base { public : Derived () {} virtual void f () {} };
class Unrelated { public : Unrelated () {} };
int g (Unrelated&) { return 0; }],[
Derived d;Base& b=d;Unrelated& e=reinterpret_cast<Unrelated&>(b);return g(e);],
ac_cv_cxx_reinterpret_cast=yes, ac_cv_cxx_reinterpret_cast=no)
AC_LANG_RESTORE
])
if test "$ac_cv_cxx_reinterpret_cast" = yes; then
AC_DEFINE(HAVE_REINTERPRET_CAST,,
[define if the compiler supports reinterpret_cast<>])
fi
])
dnl and http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_static_cast.html
AC_DEFUN([AC_CXX_STATIC_CAST],
[AC_CACHE_CHECK(whether the compiler supports static_cast<>,
ac_cv_cxx_static_cast,
[AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <typeinfo>
class Base { public : Base () {} virtual void f () = 0; };
class Derived : public Base { public : Derived () {} virtual void f () {} };
int g (Derived&) { return 0; }],[
Derived d; Base& b = d; Derived& s = static_cast<Derived&> (b); return g (s);],
ac_cv_cxx_static_cast=yes, ac_cv_cxx_static_cast=no)
AC_LANG_RESTORE
])
if test "$ac_cv_cxx_static_cast" = yes; then
AC_DEFINE(HAVE_STATIC_CAST,, [define if the compiler supports static_cast<>])
fi
])
dnl http://autoconf-archive.cryp.to/ac_cxx_dynamic_cast.html
AC_DEFUN([AC_CXX_DYNAMIC_CAST],
[AC_CACHE_CHECK(whether the compiler supports dynamic_cast<>,
ac_cv_cxx_dynamic_cast,
[AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <typeinfo>
class Base { public : Base () {} virtual void f () = 0;};
class Derived : public Base { public : Derived () {} virtual void f () {} };],[
Derived d; Base& b=d; return dynamic_cast<Derived*>(&b) ? 0 : 1;],
ac_cv_cxx_dynamic_cast=yes, ac_cv_cxx_dynamic_cast=no)
AC_LANG_RESTORE
])
if test "$ac_cv_cxx_dynamic_cast" = yes; then
AC_DEFINE(HAVE_DYNAMIC_CAST,,[define if the compiler supports dynamic_cast<>])
fi
])
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