X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/60b6c062f847a742fbc3c4ba4023bb8a0235da6d..e47ce385a75d78babaaac68d47d6f4dd5230a31c:/acinclude.m4 diff --git a/acinclude.m4 b/acinclude.m4 index 5f78fc1709..1a43281a71 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -1,88 +1,25 @@ dnl --------------------------------------------------------------------------- dnl -dnl Purpose: Cursom macros for autoconf configure script. -dnl Author: Vadim Zeitlin -dnl Created: 26.05.99 +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 GKT+ version test +dnl Objective-C(++) related macros dnl =========================================================================== +m4_define([AC_WX_LANG_OBJECTIVEC], +[AC_LANG(C) +ac_ext=m +]) -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 -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 $GTK_LIBS" -dnl -dnl Now check if the installed GTK is sufficiently new. (Also sanity -dnl checks the results of gtk-config to some extent) -dnl - AC_TRY_RUN([ -#include -#include - -int -main () -{ - int major, minor, micro; - - if (sscanf("$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) +m4_define([AC_WX_LANG_OBJECTIVECPLUSPLUS], +[AC_LANG(C++) +ac_ext=mm ]) dnl =========================================================================== @@ -93,10 +30,10 @@ 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_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 @@ -106,15 +43,15 @@ for ac_dir in $1; ]) 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 @@ -126,29 +63,33 @@ for ac_dir in $1; 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$1" fi ]) @@ -161,27 +102,23 @@ dnl WX_CPP_NEW_HEADERS checks whether the compiler has "new" header dnl or only the old one - it may be generally assumed that if dnl exists, the other "new" headers (without .h) exist too. dnl -dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false-or-cross-compiling) +dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false) dnl --------------------------------------------------------------------------- -AC_DEFUN(WX_CPP_NEW_HEADERS, +AC_DEFUN([WX_CPP_NEW_HEADERS], [ - if test "$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 --------------------------------------------------------------------------- @@ -190,27 +127,27 @@ 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 @@ -222,56 +159,58 @@ AC_DEFUN(WX_CPP_BOOL, ]) 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 - - 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) {} }; ], - 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 + [ + 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 --------------------------------------------------------------------------- -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 @@ -294,7 +233,7 @@ AC_TRY_RUN([main () { } 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]) @@ -308,7 +247,7 @@ dnl --------------------------------------------------------------------------- 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" @@ -317,19 +256,69 @@ AC_DEFUN(WX_ARG_CACHE_INIT, 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' @@ -361,12 +350,17 @@ 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) -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' @@ -397,27 +391,316 @@ AC_DEFUN(WX_ARG_ENABLE, fi ]) -dnl - -dnl - GNU libc extension (added by GL) -dnl - -AC_DEFUN(WX_GNU_EXTENSIONS, +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 $CXX flags needed to use +dnl version script file named versionfile +dnl +dnl call WX_VERSIONED_SYMBOLS(versionfile) +dnl --------------------------------------------------------------------------- +AC_DEFUN([WX_VERSIONED_SYMBOLS], [ -AC_MSG_CHECKING([if you need GNU extensions]) -AC_CACHE_VAL(wx_cv_gnu_extensions,[ - AC_TRY_COMPILE([#include ],[ + found_versioning=no + + dnl FIXME - doesn't work, Solaris linker doesn't accept wildcards + dnl in the script. + dnl dnl Check for known non-gcc cases: + dnl case "${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,$1" + fi + fi +]) + -#ifndef __GNU_LIBRARY__ - Compile error wanted +dnl =========================================================================== +dnl "3rd party" macros included here because they are not widely available +dnl =========================================================================== + +dnl --------------------------------------------------------------------------- +dnl test for availability of iconv() +dnl --------------------------------------------------------------------------- + +dnl From Bruno Haible. + +AC_DEFUN([AM_ICONV], +[ + dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and + dnl those with the standalone portable GNU libiconv installed). + + AC_ARG_WITH([libiconv-prefix], +[ --with-libiconv-prefix=DIR search for libiconv in DIR/include and DIR/lib], [ + for dir in `echo "$withval" | tr : ' '`; do + if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi + if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi + done + ]) + + AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [ + am_cv_func_iconv="no, consider installing GNU libiconv" + am_cv_lib_iconv=no + AC_TRY_LINK([#include +#include ], + [iconv_t cd = iconv_open("",""); + iconv(cd,NULL,NULL,NULL,NULL); + iconv_close(cd);], + am_cv_func_iconv=yes) + if test "$am_cv_func_iconv" != yes; then + am_save_LIBS="$LIBS" + LIBS="$LIBS -liconv" + AC_TRY_LINK([#include +#include ], + [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 +#include +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 ], + 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 -], - [wx_cv_gnu_extensions=yes], - [wx_cv_gnu_extensions=no]) + 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(y);return z;], + ac_cv_cxx_const_cast=yes, ac_cv_cxx_const_cast=no) + AC_LANG_RESTORE +]) +if test "$ac_cv_cxx_const_cast" = yes; then + AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>]) +fi +]) + +dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_reinterpret_cast.html +AC_DEFUN([AC_CXX_REINTERPRET_CAST], +[AC_CACHE_CHECK(whether the compiler supports reinterpret_cast<>, +ac_cv_cxx_reinterpret_cast, +[AC_LANG_SAVE + AC_LANG_CPLUSPLUS + AC_TRY_COMPILE([#include +class Base { public : Base () {} virtual void f () = 0;}; +class Derived : public Base { public : Derived () {} virtual void f () {} }; +class Unrelated { public : Unrelated () {} }; +int g (Unrelated&) { return 0; }],[ +Derived d;Base& b=d;Unrelated& e=reinterpret_cast(b);return g(e);], + ac_cv_cxx_reinterpret_cast=yes, ac_cv_cxx_reinterpret_cast=no) + AC_LANG_RESTORE +]) +if test "$ac_cv_cxx_reinterpret_cast" = yes; then + AC_DEFINE(HAVE_REINTERPRET_CAST,, + [define if the compiler supports reinterpret_cast<>]) +fi ]) -AC_MSG_RESULT($wx_cv_gnu_extensions) -if test "$wx_cv_gnu_extensions" = "yes"; then - AC_DEFINE_UNQUOTED(_GNU_SOURCE) +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 +]) +