365 lines
9.2 KiB
Plaintext
365 lines
9.2 KiB
Plaintext
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dnl
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dnl AC_CXX_NAMESPACES(ACTION_FOUND,ACTION_NOT_FOUND)
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dnl
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AC_DEFUN([AC_CXX_NAMESPACES],[
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AC_MSG_CHECKING(if C++ compiler supports namespaces)
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AC_TRY_COMPILE(
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[
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namespace Foo { struct A {}; }
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using namespace Foo;
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],[
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A a;
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(void)a;
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],[
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ac_cxx_namespaces=yes
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AC_MSG_RESULT([$ac_cxx_namespaces])
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$1
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],[
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ac_cxx_namespaces=no
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AC_MSG_RESULT([$ac_cxx_namespaces])
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$2
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])
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])
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dnl
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dnl AC_CXX_NAMESPACES(ACTION_FOUND,ACTION_NOT_FOUND)
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dnl
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AC_DEFUN([AC_CXX_BOOL],[
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AC_MSG_CHECKING(if C++ compiler supports bool)
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AC_TRY_COMPILE(
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[
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],[
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bool b=true;
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bool b1=false;
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(void)b;
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(void)b1;
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],[
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ac_cxx_bool=yes
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AC_MSG_RESULT([$ac_cxx_bool])
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$1
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],[
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ac_cxx_bool=no
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AC_MSG_RESULT([$ac_cxx_bool])
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$2
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])
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])
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dnl
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dnl AC_CXX_MUTABLE(ACTION_FOUND,ACTION_NOT_FOUND)
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dnl
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AC_DEFUN([AC_CXX_MUTABLE],[
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AC_MSG_CHECKING(if C++ compiler supports mutable)
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AC_TRY_COMPILE(
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[
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class k {
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mutable char *c;
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public:
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void foo() const { c=0; }
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};
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],[
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],[
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ac_cxx_mutable=yes
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AC_MSG_RESULT([$ac_cxx_mutable])
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$1
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],[
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ac_cxx_mutable=no
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AC_MSG_RESULT([$ac_cxx_mutable])
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$2
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])
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])
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dnl
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dnl AC_CXX_CONST_CAST(ACTION_FOUND,ACTION_NOT_FOUND)
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dnl
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AC_DEFUN([AC_CXX_CONST_CAST],[
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AC_MSG_CHECKING([if C++ compiler supports const_cast<>])
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AC_TRY_COMPILE(
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[
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class foo;
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],[
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const foo *c=0;
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foo *c1=const_cast<foo*>(c);
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(void)c1;
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],[
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ac_cxx_const_cast=yes
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AC_MSG_RESULT([$ac_cxx_const_cast])
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],[
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ac_cxx_const_cast=no
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AC_MSG_RESULT([$ac_cxx_const_cast])
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])
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])
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dnl
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dnl GLIBMM_CXX_MEMBER_FUNCTIONS_MEMBER_TEMPLATES(ACTION_FOUND,ACTION_NOT_FOUND)
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dnl
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dnl Test whether the compiler allows member functions to refer to spezialized member function templates.
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dnl Some compilers have problems with this. gcc 2.95.3 aborts with an internal compiler error.
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dnl
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AC_DEFUN([GLIBMM_CXX_MEMBER_FUNCTIONS_MEMBER_TEMPLATES],[
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AC_MSG_CHECKING([if C++ compiler allows member functions to refer to member templates])
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AC_TRY_COMPILE(
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[
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struct foo {
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template <class C> inline
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void doit();
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void thebug();
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};
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template <class C> inline
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void foo::doit() {
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}
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struct bar {
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void neitherabug();
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};
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void notabug() {
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void (foo::*func)();
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func = &foo::doit<int>;
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(void)func;
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}
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void bar::neitherabug() {
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void (foo::*func)();
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func = &foo::doit<int>;
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(void)func;
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}
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void foo::thebug() {
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void (foo::*func)();
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func = &foo::doit<int>; //Compiler bugs usually show here.
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(void)func;
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}
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],[],[
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glibmm_cxx_member_functions_member_templates=yes
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AC_DEFINE([GLIBMM_MEMBER_FUNCTIONS_MEMBER_TEMPLATES],[1],[does the C++ compiler allow member functions to refer to member templates])
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AC_MSG_RESULT([$glibmm_cxx_member_functions_member_templates])
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],[
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glibmm_cxx_member_functions_member_templates=no
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AC_DEFINE([GLIBMM_MEMBER_FUNCTIONS_MEMBER_TEMPLATES],[0])
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AC_MSG_RESULT([$glibmm_cxx_member_functions_member_templates])
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])
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])
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## GLIBMM_CXX_CAN_DISAMBIGUATE_CONST_TEMPLATE_SPECIALIZATIONS()
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##
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## Check whether the compiler finds it ambiguous to have both
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## const and non-const template specializations,
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## The SUN Forte compiler has this problem, though we are
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## not 100% sure that it's a C++ standards violation.
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##
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AC_DEFUN([GLIBMM_CXX_CAN_DISAMBIGUATE_CONST_TEMPLATE_SPECIALIZATIONS],
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[
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AC_REQUIRE([GLIBMM_CXX_HAS_NAMESPACE_STD])
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AC_CACHE_CHECK(
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[whether the compiler finds it ambiguous to have both const and non-const template specializations],
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[glibmm_cv_cxx_can_disambiguate_const_template_specializations],
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[
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AC_TRY_COMPILE(
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[
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#include <iostream>
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template <class T> class Foo {};
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template <typename T> class Traits {
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public:
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const char* whoami() {
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return "generic template";
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}
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};
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template <typename T> class Traits<Foo<T> > {
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public:
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const char* whoami() {
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return "partial specialization for Foo<T>";
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}
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};
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template <typename T> class Traits<Foo<const T> > {
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public:
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const char* whoami() {
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return "partial specialization for Foo<const T>";
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}
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};
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],[
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Traits<int> it;
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Traits<Foo<int> > fit;
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Traits<Foo<const int> > cfit;
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std::cout << "Traits<int> --> "
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<< it.whoami() << std::endl;
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std::cout << "Traits<Foo<int>> --> "
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<< fit.whoami() << std::endl;
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std::cout << "Traits<Foo<const int >> --> "
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<< cfit.whoami() << std::endl;
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],
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[glibmm_cv_cxx_can_disambiguate_const_template_specializations="yes"],
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[glibmm_cv_cxx_can_disambiguate_const_template_specializations="no"]
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)
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])
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if test "x${glibmm_cv_cxx_can_disambiguate_const_template_specializations}" = "xyes"; then
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{
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AC_DEFINE([GLIBMM_HAVE_DISAMBIGUOUS_CONST_TEMPLATE_SPECIALIZATIONS],[1], [Defined if the compiler does not find it ambiguous to have both const and non-const template specializations])
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}
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fi
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])
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## GLIBMM_CXX_CAN_USE_DYNAMIC_CAST_IN_UNUSED_TEMPLATE_WITHOUT_DEFINITION()
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##
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## Check whether the compiler allows us to define a template that uses
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## dynamic_cast<> with an object whose type is not defined,
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## even if we do not use that template before we have defined the type.
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## This should probably not be allowed anyway.
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##
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AC_DEFUN([GLIBMM_CXX_CAN_USE_DYNAMIC_CAST_IN_UNUSED_TEMPLATE_WITHOUT_DEFINITION],
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[
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AC_CACHE_CHECK(
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[whether the compiler allows us to define a template that uses dynamic_cast<> with an object whose type is not yet defined],
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[glibmm_cv_cxx_can_use_dynamic_cast_in_unused_template_without_definition],
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[
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AC_TRY_COMPILE(
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[
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class SomeClass;
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SomeClass* some_function();
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template <class T>
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class SomeTemplate
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{
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static bool do_something()
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{
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//This does not compile, with the MipsPro (IRIX) compiler
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//even if we don't use this template at all.
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//(We would use it later, after we have defined the type).
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return dynamic_cast<T*>(some_function());
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}
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};
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],[
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],
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[glibmm_cv_cxx_can_use_dynamic_cast_in_unused_template_without_definition="yes"],
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[glibmm_cv_cxx_can_use_dynamic_cast_in_unused_template_without_definition="no"]
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)
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])
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if test "x${glibmm_cv_cxx_can_use_dynamic_cast_in_unused_template_without_definition}" = "xyes"; then
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{
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AC_DEFINE([GLIBMM_CAN_USE_DYNAMIC_CAST_IN_UNUSED_TEMPLATE_WITHOUT_DEFINITION],[1], [Defined if the compiler allows us to define a template that uses dynamic_cast<> with an object whose type is not yet defined.])
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}
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fi
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])
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## GLIBMM_CXX_CAN_ASSIGN_NON_EXTERN_C_FUNCTIONS_TO_EXTERN_C_CALLBACKS()
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##
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## Check whether the compiler allows us to use a non-extern "C" function,
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## such as a static member function, to an extern "C" function pointer,
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## such as a GTK+ callback.
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## This should not be allowed anyway.
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##
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AC_DEFUN([GLIBMM_CXX_CAN_ASSIGN_NON_EXTERN_C_FUNCTIONS_TO_EXTERN_C_CALLBACKS],
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[
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AC_CACHE_CHECK(
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[whether the the compilerallows us to use a non-extern "C" function for an extern "C" function pointer.],
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[glibmm_cv_cxx_can_assign_non_extern_c_functions_to_extern_c_callbacks],
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[
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AC_TRY_COMPILE(
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[
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extern "C"
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{
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struct somestruct
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{
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void (*callback) (int);
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};
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} // extern "C"
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void somefunction(int)
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{
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}
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],[
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somestruct something;
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something.callback = &somefunction;
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],
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[glibmm_cv_cxx_can_assign_non_extern_c_functions_to_extern_c_callbacks="yes"],
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[glibmm_cv_cxx_can_assign_non_extern_c_functions_to_extern_c_callbacks="no"]
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)
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])
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if test "x${glibmm_cv_cxx_can_assign_non_extern_c_functions_to_extern_c_callbacks}" = "xyes"; then
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{
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AC_DEFINE([GLIBMM_CAN_ASSIGN_NON_EXTERN_C_FUNCTIONS_TO_EXTERN_C_CALLBACKS],[1], [Defined if the compiler allows us to use a non-extern "C" function for an extern "C" function pointer.])
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}
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fi
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])
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## GLIBMM_CXX_CAN_USE_NAMESPACES_INSIDE_EXTERNC()
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##
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## Check whether the compiler puts extern "C" functions in the global namespace,
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## even inside a namespace declaration. The AIX xlC compiler does this, and also
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## gets confused if we declare the namespace again inside the extern "C" block.
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## This seems like a compiler bug, but not a serious one.
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##
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AC_DEFUN([GLIBMM_CXX_CAN_USE_NAMESPACES_INSIDE_EXTERNC],
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[
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AC_CACHE_CHECK(
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[whether the compiler uses namespace declarations inside extern "C" blocks.],
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[glibmm_cv_cxx_can_use_namespaces_inside_externc],
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[
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AC_TRY_COMPILE(
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[
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namespace test
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{
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extern "C"
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{
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void do_something();
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} //extern C
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class Something
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{
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protected:
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int i;
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friend void do_something();
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};
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void do_something()
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{
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Something something;
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something.i = 1;
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}
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} //namespace
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],[
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],
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[glibmm_cv_cxx_can_use_namespaces_inside_externc="yes"],
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[glibmm_cv_cxx_can_use_namespaces_inside_externc="no"]
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)
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])
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if test "x${glibmm_cv_cxx_can_use_namespaces_inside_externc}" = "xyes"; then
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{
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AC_DEFINE([GLIBMM_CAN_USE_NAMESPACES_INSIDE_EXTERNC],[1], [Defined if the compiler whether the compiler uses namespace declarations inside extern "C" blocks.])
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}
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fi
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])
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