dnl ---------------------------------------------------------------------------
dnl
-dnl Purpose: Cursom macros for autoconf configure script.
-dnl Author: Vadim Zeitlin
-dnl Created: 26.05.99
-dnl Version: $Id$
-dnl ---------------------------------------------------------------------------
-
-dnl ===========================================================================
-dnl GKT+ version test
-dnl ===========================================================================
-
-dnl ---------------------------------------------------------------------------
-dnl AM_PATH_GTK([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
-dnl Test for GTK, and define GTK_CFLAGS and GTK_LIBS. Uses variables
-dnl gtk_config_prefix and/or gtk_config_exec_prefix if defined.
-dnl ---------------------------------------------------------------------------
+dnl Macros for configure.in for wxWindows by Robert Roebling, Phil Blecker,
+dnl Vadim Zeitlin and Ron Lee
dnl
-AC_DEFUN(AM_PATH_GTK,
-[
- if test x$gtk_config_exec_prefix != x ; then
- gtk_config_args="$gtk_config_args --exec-prefix=$gtk_config_exec_prefix"
- if test x${GTK_CONFIG+set} != xset ; then
- GTK_CONFIG=$gtk_config_exec_prefix/bin/gtk-config
- fi
- fi
- if test x$gtk_config_prefix != x ; then
- gtk_config_args="$gtk_config_args --prefix=$gtk_config_prefix"
- if test x${GTK_CONFIG+set} != xset ; then
- GTK_CONFIG=$gtk_config_prefix/bin/gtk-config
- fi
- fi
-
- AC_PATH_PROG(GTK_CONFIG, gtk-config, no)
- min_gtk_version=ifelse([$1], ,0.99.7,$1)
- AC_MSG_CHECKING(for GTK - version >= $min_gtk_version)
- no_gtk=""
- if test "$GTK_CONFIG" != "no" ; then
- GTK_CFLAGS=`$GTK_CONFIG --cflags`
- GTK_LIBS=`$GTK_CONFIG --libs`
- ac_save_CFLAGS="$CFLAGS"
- ac_save_LIBS="$LIBS"
- CFLAGS="$CFLAGS $GTK_CFLAGS"
- LIBS="$LIBS $GTK_LIBS"
-dnl
-dnl Now check if the installed GTK is sufficiently new. (Also sanity
-dnl checks the results of gtk-config to some extent)
+dnl This script is under the wxWindows licence.
dnl
- AC_TRY_RUN([
-#include <gtk/gtk.h>
-#include <stdio.h>
-
-int
-main ()
-{
- int major, minor, micro;
-
- if (sscanf("$min_gtk_version", "%d.%d.%d", &major, &minor, µ) != 3) {
- printf("%s, bad version string\n", "$min_gtk_version");
- exit(1);
- }
-
- if (gtk_minor_version == 1) return FALSE;
-
- return !((gtk_major_version > major) ||
- ((gtk_major_version == major) && (gtk_minor_version > minor)) ||
- ((gtk_major_version == major) && (gtk_minor_version == minor) && (gtk_micro_version >= micro)));
-}
-],, no_gtk=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
- CFLAGS="$ac_save_CFLAGS"
- LIBS="$ac_save_LIBS"
- else
- no_gtk=yes
- fi
- if test "x$no_gtk" = x ; then
- AC_MSG_RESULT(yes)
- ifelse([$2], , :, [$2])
- else
- AC_MSG_RESULT(no)
- GTK_CFLAGS=""
- GTK_LIBS=""
- ifelse([$3], , :, [$3])
- fi
- AC_SUBST(GTK_CFLAGS)
- AC_SUBST(GTK_LIBS)
-])
+dnl Version: $Id$
+dnl ---------------------------------------------------------------------------
dnl ===========================================================================
dnl macros to find the a file in the list of include/lib paths
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_DEFUN([WX_PATH_FIND_INCLUDES],
[
ac_find_includes=
-for ac_dir in $1;
+for ac_dir in $1 /usr/include;
do
if test -f "$ac_dir/$2"; then
ac_find_includes=$ac_dir
])
dnl ---------------------------------------------------------------------------
-dnl call WX_PATH_FIND_LIBRARIES(search path, header name), sets ac_find_includes
+dnl call WX_PATH_FIND_LIBRARIES(search path, header 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_DEFUN([WX_PATH_FIND_LIBRARIES],
[
ac_find_libraries=
-for ac_dir in $1;
+for ac_dir in $1 /usr/lib;
do
- for ac_extension in a so sl; do
+ for ac_extension in a so sl dylib; do
if test -f "$ac_dir/lib$2.$ac_extension"; then
ac_find_libraries=$ac_dir
break 2
dnl ---------------------------------------------------------------------------
dnl Path to include, already defined
dnl ---------------------------------------------------------------------------
-AC_DEFUN(WX_INCLUDE_PATH_EXIST,
+AC_DEFUN([WX_INCLUDE_PATH_EXIST],
[
- ac_path_to_include=$1
- echo "$2" | grep "\-I$1" > /dev/null
- result=$?
- if test $result = 0; then
+ dnl never add -I/usr/include to the CPPFLAGS
+ if test "x$1" = "x/usr/include"; then
ac_path_to_include=""
else
- ac_path_to_include="-I$1"
+ 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 Path to link, already defined
dnl ---------------------------------------------------------------------------
-AC_DEFUN(WX_LINK_PATH_EXIST,
+AC_DEFUN([WX_LINK_PATH_EXIST],
[
echo "$2" | grep "\-L$1" > /dev/null
result=$?
if test $result = 0; then
ac_path_to_link=""
else
- ac_path_to_link="-L$1"
+ ac_path_to_link=" -L$1"
fi
])
dnl or only the old <iostream.h> one - it may be generally assumed that if
dnl <iostream> exists, the other "new" headers (without .h) exist too.
dnl
-dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false-or-cross-compiling)
+dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false)
dnl ---------------------------------------------------------------------------
-AC_DEFUN(WX_CPP_NEW_HEADERS,
+AC_DEFUN([WX_CPP_NEW_HEADERS],
[
- if test "$cross_compiling" = "yes"; then
- ifelse([$2], , :, [$2])
- else
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_CHECK_HEADERS(iostream)
- if test "x$HAVE_IOSTREAM" = x ; then
- ifelse([$2], , :, [$2])
- else
+ if test "$ac_cv_header_iostream" = "yes" ; then
ifelse([$1], , :, [$1])
+ else
+ ifelse([$2], , :, [$2])
fi
AC_LANG_RESTORE
- fi
])
dnl ---------------------------------------------------------------------------
dnl call WX_CPP_BOOL - will define HAVE_BOOL if the compiler supports bool
dnl ---------------------------------------------------------------------------
-AC_DEFUN(WX_CPP_BOOL,
+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_RUN([
- int main()
- {
- bool b = true;
+ AC_TRY_COMPILE(
+ [
+ ],
+ [
+ bool b = true;
- return 0;
- }
+ return 0;
],
[
- AC_DEFINE(HAVE_BOOL)
wx_cv_cpp_bool=yes
],
- wx_cv_cpp_bool=no,
- wx_cv_cpp_bool=no
+ [
+ wx_cv_cpp_bool=no
+ ]
)
AC_LANG_RESTORE
])
dnl ---------------------------------------------------------------------------
-dnl WX_CPP_SIZE_T_IS_NOT_INT checks whether size_t and int are different types,
-dnl i.e. whether we may overload operator[] on its argument type
+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_SIZE_T_IS_NOT_INT,
+AC_DEFUN([WX_CPP_EXPLICIT],
[
- AC_CACHE_CHECK([if size_t and int are different types], wx_cv_cpp_sizet_not_int,
+ AC_CACHE_CHECK([if C++ compiler supports the explicit keyword],
+ wx_cv_explicit,
[
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
- AC_TRY_RUN([
- #include <stdlib.h>
-
- class S
- {
- public:
- S(char *s) { m_s = s; }
-
- char operator[](size_t n) const { return m_s[n]; }
- char operator[](int n) const { return m_s[n]; }
-
- private:
- char *m_s;
- };
-
- int main()
- {
- S s("dummy");
- size_t n1 = 2;
- int n2 = 3;
-
- return s[n1] == s[n2];
- }
+ 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_DEFINE(wxUSE_SIZE_T_STRING_OPERATOR) wx_cv_cpp_sizet_not_int=yes,
- wx_cv_cpp_sizet_not_int=no,
- wx_cv_cpp_sizet_not_int=no
+ [
+ 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 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_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>
} 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)
+}], [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])
dnl override AC_ARG_ENABLE/WITH to cache the results in .cache file
dnl ---------------------------------------------------------------------------
-AC_DEFUN(WX_ARG_CACHE_INIT,
+AC_DEFUN([WX_ARG_CACHE_INIT],
[
wx_arg_cache_file="configarg.cache"
echo "loading argument cache $wx_arg_cache_file"
touch ${wx_arg_cache_file}
])
-AC_DEFUN(WX_ARG_CACHE_FLUSH,
+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)
-AC_DEFUN(WX_ARG_WITH,
+AC_DEFUN([WX_ARG_WITH],
[
- AC_MSG_CHECKING("for --with-$1")
+ AC_MSG_CHECKING([for --with-$1])
no_cache=0
- AC_ARG_WITH($1, $2,
+ AC_ARG_WITH($1, [$2],
[
if test "$withval" = yes; then
ac_cv_use_$1='$3=yes'
])
dnl like WX_ARG_WITH but uses AC_ARG_ENABLE instead of AC_ARG_WITH
-dnl usage: WX_ARG_ENABLE(option, helpmessage, variable-name)
-AC_DEFUN(WX_ARG_ENABLE,
+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],
[
- AC_MSG_CHECKING("for --enable-$1")
+ enablestring=$4
+ AC_MSG_CHECKING([for --${enablestring:-enable}-$1])
no_cache=0
- AC_ARG_ENABLE($1, $2,
+ AC_ARG_ENABLE($1, [$2],
[
if test "$enableval" = yes; then
ac_cv_use_$1='$3=yes'
fi
])
+
+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 $CXX flags needed to use
+dnl version script file named versionfile
+dnl
+dnl call WX_VERSIONED_SYMBOLS(versionfile)
+dnl ---------------------------------------------------------------------------
+AC_DEFUN([WX_VERSIONED_SYMBOLS],
+[
+ found_versioning=no
+
+ dnl FIXME - doesn't work, Solaris linker doesn't accept wildcards
+ dnl in the script.
+ dnl dnl Check for known non-gcc cases:
+ dnl case "${host}" in
+ dnl *-*-solaris2* )
+ dnl if test "x$GCC" != "xyes" ; then
+ dnl LDFLAGS_VERSIONING="-M $1"
+ dnl found_versioning=yes
+ dnl fi
+ dnl ;;
+ dnl esac
+
+ dnl Generic check for GCC or GCC-like behaviour (Intel C++, GCC):
+ if test $found_versioning = no ; then
+ 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
+ rm -f conftest.output conftest.stderr conftest.sym conftest.cpp
+ ])
+ if test $wx_cv_version_script = yes ; then
+ LDFLAGS_VERSIONING="-Wl,--version-script,$1"
+ fi
+ fi
+])
+
+
+dnl ===========================================================================
+dnl "3rd party" macros included here because they are not widely available
+dnl ===========================================================================
+
+dnl ---------------------------------------------------------------------------
+dnl test for availability of iconv()
+dnl ---------------------------------------------------------------------------
+
+dnl From Bruno Haible.
+
+AC_DEFUN([AM_ICONV],
+[
+ dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
+ dnl those with the standalone portable GNU libiconv installed).
+
+ AC_ARG_WITH([libiconv-prefix],
+[ --with-libiconv-prefix=DIR search for libiconv in DIR/include and DIR/lib], [
+ for dir in `echo "$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
+])
projects / wxWidgets.git / blobdiff