X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2b5f62a0b2db198609b45dec622a018dae37008e..5dc6072884f0359f344d3240aef602b4462a32f4:/acinclude.m4 diff --git a/acinclude.m4 b/acinclude.m4 index beffd8ff0d..1a43281a71 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 =========================================================================== @@ -88,14 +102,11 @@ 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], , :, [$2]) - else AC_LANG_SAVE AC_LANG_CPLUSPLUS @@ -108,7 +119,6 @@ AC_DEFUN([WX_CPP_NEW_HEADERS], fi AC_LANG_RESTORE - fi ]) dnl --------------------------------------------------------------------------- @@ -397,15 +407,17 @@ AC_DEFUN([WX_VERSIONED_SYMBOLS], [ found_versioning=no - dnl Check for known non-gcc cases: - case "${host}" in - *-*-solaris2* ) - if test "x$GCC" != "xyes" ; then - LDFLAGS_VERSIONING="-M $1" - found_versioning=yes - fi - ;; - esac + dnl FIXME - doesn't work, Solaris linker doesn't accept wildcards + dnl in the script. + dnl dnl Check for known non-gcc cases: + dnl case "${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 @@ -425,7 +437,44 @@ AC_DEFUN([WX_VERSIONED_SYMBOLS], 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,$1" @@ -578,3 +627,80 @@ if test "$enable_largefile" != no; then 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 +]) +