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, 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_find_libraries= for ac_dir in $1 /usr/lib; do for ac_extension in a so sl dylib; do if test -f "$ac_dir/lib$2.$ac_extension"; then ac_find_libraries=$ac_dir break 2 fi done done ]) 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 Path to link, already defined dnl --------------------------------------------------------------------------- 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$1" fi ]) dnl =========================================================================== dnl C++ features test dnl =========================================================================== dnl --------------------------------------------------------------------------- dnl WX_CPP_NEW_HEADERS checks whether the compiler has "new" header dnl or only the old one - it may be generally assumed that if dnl exists, the other "new" headers (without .h) exist too. dnl dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false) dnl --------------------------------------------------------------------------- AC_DEFUN([WX_CPP_NEW_HEADERS], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_CHECK_HEADERS(iostream) if test "$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 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 #include ], [ #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 #include ], [ #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) AC_DEFUN([WX_ARG_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' 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 =========================================================================== 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,$1" fi fi ]) dnl =========================================================================== dnl "3rd party" macros included here because they are not widely available dnl =========================================================================== dnl --------------------------------------------------------------------------- dnl test for availability of iconv() dnl --------------------------------------------------------------------------- dnl From Bruno Haible. AC_DEFUN([AM_ICONV], [ dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and dnl those with the standalone portable GNU libiconv installed). AC_ARG_WITH([libiconv-prefix], [ --with-libiconv-prefix=DIR search for libiconv in DIR/include and DIR/lib], [ for dir in `echo "$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 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 ]) 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 ])