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|
AC_DEFUN([AX_ISC_CPP11], [
CXX_SAVED=$CXX
feature=
for retry in "none" "--std=c++11" "--std=c++0x" "--std=c++1x" "fail"; do
if test "$retry" = "fail"; then
AC_MSG_ERROR([$feature (a C++11 feature) is not supported])
fi
if test "$retry" != "none"; then
AC_MSG_WARN([unsupported C++11 feature])
AC_MSG_NOTICE([retrying by adding $retry to $CXX])
CXX="$CXX_SAVED $retry"
AC_MSG_CHECKING($retry support)
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[],
[int myincr = 1;])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
fi
AC_MSG_CHECKING(std::unique_ptr support)
feature="std::unique_ptr"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <memory>],
[std::unique_ptr<int> a;])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(cbegin/cend support)
feature="cbegin/cend"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <string>],
[const std::string& s = "abcd";
unsigned count = 0;
for (std::string::const_iterator i = s.cbegin();
i != s.cend(); ++i)
if (*i == 'b')
++count;])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(final method support)
feature="final method"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[class Foo {
public:
virtual ~Foo() {};
virtual void bar() final;
};],[])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(override method support)
feature="override method"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[class Foo {
public:
virtual ~Foo() {};
virtual void foobar();
};
class Bar : public Foo {
public:
virtual ~Bar() {};
virtual void foobar() override;
};],[])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(aggregate initialization support)
feature="aggregate initialization"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <vector>],
[std::vector<int> foo = { 1, 2, 3};])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(variadic template support)
feature="variadic template"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[template<typename ... Args>
struct A {
void foo(Args... myargs) { return; };
};],
[A<> a;
a.foo();])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(static_assert support)
feature="static_assert"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[static_assert(1 + 1 == 2, "");],
[])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(template alias)
feature="template alias"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[template<int i>
class I {
public: int get() { return i; };
};
using Zero = I<0>;],
[Zero Z;
return Z.get();])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(constexpr support)
feature="constexpr"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <string>
typedef char const* const Tag;
constexpr Tag FOOBAR = "FOOBAR";],
[const std::string foobar(FOOBAR);
return static_cast<int>(foobar.length());])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(enum class support)
feature="enum class"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[enum class FooBar {
FOO = 1,
BAR = 2
};],
[FooBar f = FooBar::FOO;
return (f == FooBar::FOO ? 1 : 2);])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(range-for support)
feature="constexpr"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <vector>
std::vector<int> v = { 1, 2, 3, 4 };],
[int sum = 0;
for (auto i : v) {
sum += i;
}
return sum;])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
continue])
AC_MSG_CHECKING(lambda support)
feature="lambda"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[],
[auto myincr = [[]](int x) { return x + 1; };])],
[AC_MSG_RESULT([yes])
break],
[AC_MSG_RESULT([no])
continue])
done
])dnl AX_ISC_RPATH
|
