X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b7043674e7ab9d89a582131b4ce6e684ccabf6b6..e0b15ca79530689420dff1928f15d2905a746b42:/acinclude.m4 diff --git a/acinclude.m4 b/acinclude.m4 index 0f77f7d51e..4f4ecb9682 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -8,6 +8,20 @@ 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 =========================================================================== @@ -19,7 +33,7 @@ dnl --------------------------------------------------------------------------- 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 @@ -29,15 +43,15 @@ for ac_dir in $1; ]) dnl --------------------------------------------------------------------------- -dnl call WX_PATH_FIND_LIBRARIES(search path, header name), sets ac_find_libraries +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; + ac_find_libraries= + for ac_dir in $1; do - for ac_extension in a so sl dylib; do + for ac_extension in a so sl dylib dll.a; do if test -f "$ac_dir/lib$2.$ac_extension"; then ac_find_libraries=$ac_dir break 2 @@ -46,32 +60,58 @@ for ac_dir in $1; 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], [ - 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$1" + fi fi ]) dnl --------------------------------------------------------------------------- -dnl Path to link, already defined +dnl Usage: WX_LINK_PATH_EXIST(path, libpath) +dnl +dnl Set ac_path_to_link to nothing if path is already in libpath of to -Lpath +dnl if it is not, so that libpath can be set to "$libpath$ac_path_to_link" +dnl after calling this function dnl --------------------------------------------------------------------------- AC_DEFUN([WX_LINK_PATH_EXIST], [ - echo "$2" | grep "\-L$1" > /dev/null - result=$? - if test $result = 0; then + dnl never add -L/usr/libXXX explicitely to libpath + if test "$1" = "default location"; then ac_path_to_link="" else - ac_path_to_link=" -L$1" + echo "$2" | grep "\-L$1" > /dev/null + result=$? + if test $result = 0; then + ac_path_to_link="" + else + ac_path_to_link=" -L$1" + fi fi ]) @@ -84,14 +124,11 @@ dnl WX_CPP_NEW_HEADERS checks whether the compiler has "new" header dnl or only the old one - it may be generally assumed that if dnl exists, the other "new" headers (without .h) exist too. dnl -dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false-or-cross-compiling) +dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false) dnl --------------------------------------------------------------------------- AC_DEFUN([WX_CPP_NEW_HEADERS], [ - if test "$cross_compiling" = "yes"; then - ifelse([$2], , :, [$2]) - else AC_LANG_SAVE AC_LANG_CPLUSPLUS @@ -104,7 +141,6 @@ AC_DEFUN([WX_CPP_NEW_HEADERS], fi AC_LANG_RESTORE - fi ]) dnl --------------------------------------------------------------------------- @@ -144,6 +180,53 @@ AC_DEFUN([WX_CPP_BOOL], fi ]) +dnl --------------------------------------------------------------------------- +dnl WX_CPP_EXPLICIT checks whether the C++ compiler support the explicit +dnl keyword and defines HAVE_EXPLICIT if this is the case +dnl --------------------------------------------------------------------------- + +AC_DEFUN([WX_CPP_EXPLICIT], +[ + AC_CACHE_CHECK([if C++ compiler supports the explicit keyword], + wx_cv_explicit, + [ + AC_LANG_SAVE + AC_LANG_CPLUSPLUS + + dnl do the test in 2 steps: first check that the compiler knows about the + dnl explicit keyword at all and then verify that it really honours it + AC_TRY_COMPILE( + [ + class Foo { public: explicit Foo(int) {} }; + ], + [ + return 0; + ], + [ + AC_TRY_COMPILE( + [ + class Foo { public: explicit Foo(int) {} }; + static void TakeFoo(const Foo& foo) { } + ], + [ + TakeFoo(17); + return 0; + ], + wx_cv_explicit=no, + wx_cv_explicit=yes + ) + ], + wx_cv_explicit=no + ) + + AC_LANG_RESTORE + ]) + + if test "$wx_cv_explicit" = "yes"; then + AC_DEFINE(HAVE_EXPLICIT) + fi +]) + dnl --------------------------------------------------------------------------- dnl a slightly better AC_C_BIGENDIAN macro which allows cross-compiling dnl --------------------------------------------------------------------------- @@ -252,10 +335,11 @@ AC_DEFUN([WX_ARG_SYS_WITH], ]) dnl this macro checks for a command line argument and caches the result -dnl usage: WX_ARG_WITH(option, helpmessage, variable-name) +dnl usage: WX_ARG_WITH(option, helpmessage, variable-name, [withstring]) AC_DEFUN([WX_ARG_WITH], [ - AC_MSG_CHECKING([for --with-$1]) + withstring=$4 + AC_MSG_CHECKING([for --${withstring:-with}-$1]) no_cache=0 AC_ARG_WITH($1, [$2], [ @@ -289,10 +373,15 @@ AC_DEFUN([WX_ARG_WITH], ]) dnl like WX_ARG_WITH but uses AC_ARG_ENABLE instead of AC_ARG_WITH -dnl usage: WX_ARG_ENABLE(option, helpmessage, variable-name) +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], [ @@ -326,12 +415,101 @@ AC_DEFUN([WX_ARG_ENABLE], ]) +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 + + 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,$1" + fi + fi +]) + dnl =========================================================================== dnl "3rd party" macros included here because they are not widely available dnl =========================================================================== - dnl --------------------------------------------------------------------------- dnl test for availability of iconv() dnl --------------------------------------------------------------------------- @@ -396,7 +574,7 @@ size_t iconv(); ) iconv_const= - if test "x$wx_cv_func_iconv_const" != "xyes"; then + if test "x$wx_cv_func_iconv_const" = "xyes"; then iconv_const="const" fi @@ -410,199 +588,142 @@ size_t iconv(); AC_SUBST(LIBICONV) ]) - dnl --------------------------------------------------------------------------- -dnl test for GTK+ 2.0 +dnl AC_SYS_LARGEFILE (partly based on the code from autoconf 2.5x) dnl --------------------------------------------------------------------------- -dnl AM_PATH_GTK_2_0([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, MODULES]]]]) -dnl Test for GTK, and define GTK_CFLAGS and GTK_LIBS -dnl -AC_DEFUN(AM_PATH_GTK_2_0, -[dnl -dnl Get the cflags and libraries from the gtk-config-2.0 script +dnl WX_SYS_LARGEFILE_TEST dnl -AC_ARG_WITH(gtk-prefix,[ --with-gtk-prefix=PFX Prefix where GTK is installed (optional)], - gtk_config_prefix="$withval", gtk_config_prefix="") -AC_ARG_WITH(gtk-exec-prefix,[ --with-gtk-exec-prefix=PFX Exec prefix where GTK is installed (optional)], - gtk_config_exec_prefix="$withval", gtk_config_exec_prefix="") -AC_ARG_ENABLE(gtktest, [ --disable-gtktest Do not try to compile and run a test GTK program], - , enable_gtktest=yes) - - for module in . $4 - do - case "$module" in - gthread) - gtk_config_args="$gtk_config_args gthread" - ;; - esac - done +dnl NB: original autoconf test was checking if compiler supported 6 bit off_t +dnl arithmetic properly but this failed miserably with gcc under Linux +dnl whereas the system still supports 64 bit files, so now simply check +dnl that off_t is big enough +define(WX_SYS_LARGEFILE_TEST, +[typedef struct { + unsigned int field: sizeof(off_t) == 8; +} wxlf; +]) - if test x$gtk_config_exec_prefix != x ; then - gtk_config_args="$gtk_config_args --exec-prefix=$gtk_config_exec_prefix" - if test x${GTK_CONFIG_2_0+set} != xset ; then - GTK_CONFIG_2_0=$gtk_config_exec_prefix/bin/gtk-config-2.0 - 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_2_0+set} != xset ; then - GTK_CONFIG_2_0=$gtk_config_prefix/bin/gtk-config-2.0 - fi - fi - AC_PATH_PROG(GTK_CONFIG_2_0, gtk-config-2.0, no) - min_gtk_version=ifelse([$1], ,1.3.1,$1) - AC_MSG_CHECKING(for GTK - version >= $min_gtk_version) - no_gtk="" - if test "$GTK_CONFIG_2_0" = "no" ; then - no_gtk=yes - else - GTK_CFLAGS=`$GTK_CONFIG_2_0 $gtk_config_args --cflags` - GTK_LIBS=`$GTK_CONFIG_2_0 $gtk_config_args --libs` - gtk_config_major_version=`$GTK_CONFIG_2_0 $gtk_config_args --version | \ - sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'` - gtk_config_minor_version=`$GTK_CONFIG_2_0 $gtk_config_args --version | \ - sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'` - gtk_config_micro_version=`$GTK_CONFIG_2_0 $gtk_config_args --version | \ - sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'` - if test "x$enable_gtktest" = "xyes" ; then - ac_save_CFLAGS="$CFLAGS" - ac_save_LIBS="$LIBS" - CFLAGS="$CFLAGS $GTK_CFLAGS" - LIBS="$GTK_LIBS $LIBS" -dnl -dnl Now check if the installed GTK is sufficiently new. (Also sanity -dnl checks the results of gtk-config-2.0 to some extent +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 ], + 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 - rm -f conf.gtktest - AC_TRY_RUN([ -#include -#include -#include +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(y);return z;], + ac_cv_cxx_const_cast=yes, ac_cv_cxx_const_cast=no) + AC_LANG_RESTORE +]) +if test "$ac_cv_cxx_const_cast" = yes; then + AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>]) +fi +]) -int -main () -{ - int major, minor, micro; - char *tmp_version; - - system ("touch conf.gtktest"); - - /* HP/UX 9 (%@#!) writes to sscanf strings */ - tmp_version = g_strdup("$min_gtk_version"); - if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, µ) != 3) { - printf("%s, bad version string\n", "$min_gtk_version"); - exit(1); - } - - if ((gtk_major_version != $gtk_config_major_version) || - (gtk_minor_version != $gtk_config_minor_version) || - (gtk_micro_version != $gtk_config_micro_version)) - { - printf("\n*** 'gtk-config-2.0 --version' returned %d.%d.%d, but GTK+ (%d.%d.%d)\n", - $gtk_config_major_version, $gtk_config_minor_version, $gtk_config_micro_version, - gtk_major_version, gtk_minor_version, gtk_micro_version); - printf ("*** was found! If gtk-config-2.0 was correct, then it is best\n"); - printf ("*** to remove the old version of GTK+. You may also be able to fix the error\n"); - printf("*** by modifying your LD_LIBRARY_PATH enviroment variable, or by editing\n"); - printf("*** /etc/ld.so.conf. Make sure you have run ldconfig if that is\n"); - printf("*** required on your system.\n"); - printf("*** If gtk-config-2.0 was wrong, set the environment variable GTK_CONFIG_2_0\n"); - printf("*** to point to the correct copy of gtk-config-2.0, and remove the file config.cache\n"); - printf("*** before re-running configure\n"); - } -#if defined (GTK_MAJOR_VERSION) && defined (GTK_MINOR_VERSION) && defined (GTK_MICRO_VERSION) - else if ((gtk_major_version != GTK_MAJOR_VERSION) || - (gtk_minor_version != GTK_MINOR_VERSION) || - (gtk_micro_version != GTK_MICRO_VERSION)) - { - printf("*** GTK+ header files (version %d.%d.%d) do not match\n", - GTK_MAJOR_VERSION, GTK_MINOR_VERSION, GTK_MICRO_VERSION); - printf("*** library (version %d.%d.%d)\n", - gtk_major_version, gtk_minor_version, gtk_micro_version); - } -#endif /* defined (GTK_MAJOR_VERSION) ... */ - else - { - if ((gtk_major_version > major) || - ((gtk_major_version == major) && (gtk_minor_version > minor)) || - ((gtk_major_version == major) && (gtk_minor_version == minor) && (gtk_micro_version >= micro))) - { - return 0; - } - else - { - printf("\n*** An old version of GTK+ (%d.%d.%d) was found.\n", - gtk_major_version, gtk_minor_version, gtk_micro_version); - printf("*** You need a version of GTK+ newer than %d.%d.%d. The latest version of\n", - major, minor, micro); - printf("*** GTK+ is always available from ftp://ftp.gtk.org.\n"); - printf("***\n"); - printf("*** If you have already installed a sufficiently new version, this error\n"); - printf("*** probably means that the wrong copy of the gtk-config-2.0 shell script is\n"); - printf("*** being found. The easiest way to fix this is to remove the old version\n"); - printf("*** of GTK+, but you can also set the GTK_CONFIG_2_0 environment to point to the\n"); - printf("*** correct copy of gtk-config-2.0. (In this case, you will have to\n"); - printf("*** modify your LD_LIBRARY_PATH enviroment variable, or edit /etc/ld.so.conf\n"); - printf("*** so that the correct libraries are found at run-time))\n"); - } - } - return 1; -} -],, no_gtk=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"]) - CFLAGS="$ac_save_CFLAGS" - LIBS="$ac_save_LIBS" - fi - fi - if test "x$no_gtk" = x ; then - AC_MSG_RESULT(yes (version $gtk_config_major_version.$gtk_config_minor_version.$gtk_config_micro_version)) - ifelse([$2], , :, [$2]) - else - AC_MSG_RESULT(no) - if test "$GTK_CONFIG_2_0" = "no" ; then - echo "*** The gtk-config-2.0 script installed by GTK could not be found" - echo "*** If GTK was installed in PREFIX, make sure PREFIX/bin is in" - echo "*** your path, or set the GTK_CONFIG_2_0 environment variable to the" - echo "*** full path to gtk-config-2.0." - else - if test -f conf.gtktest ; then - : - else - echo "*** Could not run GTK test program, checking why..." - CFLAGS="$CFLAGS $GTK_CFLAGS" - LIBS="$LIBS $GTK_LIBS" - AC_TRY_LINK([ -#include -#include -], [ return ((gtk_major_version) || (gtk_minor_version) || (gtk_micro_version)); ], - [ echo "*** The test program compiled, but did not run. This usually means" - echo "*** that the run-time linker is not finding GTK or finding the wrong" - echo "*** version of GTK. If it is not finding GTK, you'll need to set your" - echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point" - echo "*** to the installed location Also, make sure you have run ldconfig if that" - echo "*** is required on your system" - echo "***" - echo "*** If you have an old version installed, it is best to remove it, although" - echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH" - echo "***" - echo "*** If you have a RedHat 5.0 system, you should remove the GTK package that" - echo "*** came with the system with the command" - echo "***" - echo "*** rpm --erase --nodeps gtk gtk-devel" ], - [ echo "*** The test program failed to compile or link. See the file config.log for the" - echo "*** exact error that occured. This usually means GTK was incorrectly installed" - echo "*** or that you have moved GTK since it was installed. In the latter case, you" - echo "*** may want to edit the gtk-config-2.0 script: $GTK_CONFIG_2_0" ]) - CFLAGS="$ac_save_CFLAGS" - LIBS="$ac_save_LIBS" - fi - fi - GTK_CFLAGS="" - GTK_LIBS="" - ifelse([$3], , :, [$3]) - fi - AC_SUBST(GTK_CFLAGS) - AC_SUBST(GTK_LIBS) - rm -f conf.gtktest +dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_reinterpret_cast.html +AC_DEFUN([AC_CXX_REINTERPRET_CAST], +[AC_CACHE_CHECK(whether the compiler supports reinterpret_cast<>, +ac_cv_cxx_reinterpret_cast, +[AC_LANG_SAVE + AC_LANG_CPLUSPLUS + AC_TRY_COMPILE([#include +class Base { public : Base () {} virtual void f () = 0;}; +class Derived : public Base { public : Derived () {} virtual void f () {} }; +class Unrelated { public : Unrelated () {} }; +int g (Unrelated&) { return 0; }],[ +Derived d;Base& b=d;Unrelated& e=reinterpret_cast(b);return g(e);], + ac_cv_cxx_reinterpret_cast=yes, ac_cv_cxx_reinterpret_cast=no) + AC_LANG_RESTORE +]) +if test "$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 +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 (b); return g (s);], + ac_cv_cxx_static_cast=yes, ac_cv_cxx_static_cast=no) + AC_LANG_RESTORE +]) +if test "$ac_cv_cxx_static_cast" = yes; then + AC_DEFINE(HAVE_STATIC_CAST,, [define if the compiler supports static_cast<>]) +fi +]) + +dnl http://autoconf-archive.cryp.to/ac_cxx_dynamic_cast.html +AC_DEFUN([AC_CXX_DYNAMIC_CAST], +[AC_CACHE_CHECK(whether the compiler supports dynamic_cast<>, +ac_cv_cxx_dynamic_cast, +[AC_LANG_SAVE + AC_LANG_CPLUSPLUS + AC_TRY_COMPILE([#include +class Base { public : Base () {} virtual void f () = 0;}; +class Derived : public Base { public : Derived () {} virtual void f () {} };],[ +Derived d; Base& b=d; return dynamic_cast(&b) ? 0 : 1;], + ac_cv_cxx_dynamic_cast=yes, ac_cv_cxx_dynamic_cast=no) + AC_LANG_RESTORE +]) +if test "$ac_cv_cxx_dynamic_cast" = yes; then + AC_DEFINE(HAVE_DYNAMIC_CAST,,[define if the compiler supports dynamic_cast<>]) +fi +]) +