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https://gitlab.isc.org/isc-projects/kea
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[5208] C++11 detection code moved to ax_cpp11.m4
This commit is contained in:
Tomek Mrugalski
119
configure.ac
119
configure.ac
@@ -118,124 +118,7 @@ AC_CHECK_DECL([__clang__], [CLANGPP="yes"], [CLANGPP="no"])
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AM_CONDITIONAL(USE_CLANGPP, test "X${CLANGPP}" = "Xyes")
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# Check for C++11 features support
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CXX_SAVED=$CXX
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feature=
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for retry in "none" "--std=c++11" "--std=c++0x" "--std=c++1x" "fail"; do
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if test "$retry" = "fail"; then
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AC_MSG_ERROR([$feature (a C++11 feature) is not supported])
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fi
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if test "$retry" != "none"; then
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AC_MSG_WARN([unsupported C++11 feature])
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AC_MSG_NOTICE([retrying by adding $retry to $CXX])
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CXX="$CXX_SAVED $retry"
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AC_MSG_CHECKING($retry support)
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[],
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[int myincr = 1;])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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fi
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AC_MSG_CHECKING(std::unique_ptr support)
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feature="std::unique_ptr"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <memory>],
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[std::unique_ptr<int> a;])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(cbegin/cend support)
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feature="cbegin/cend"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <string>],
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[const std::string& s = "abcd";
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unsigned count = 0;
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for (std::string::const_iterator i = s.cbegin();
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i != s.cend(); ++i)
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if (*i == 'b')
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++count;])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(final method support)
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feature="final method"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[class Foo {
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public:
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virtual ~Foo() {};
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virtual void bar() final;
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};],[])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(aggregate initialization support)
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feature="aggregate initialization"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <vector>],
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[std::vector<int> foo = { 1, 2, 3};])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(variadic template support)
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feature="variadic template"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[template<typename ... Args>
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struct A {
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void foo(Args... myargs) { return; };
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};],
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[A<> a;
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a.foo();])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(static_assert support)
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feature="static_assert"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[static_assert(1 + 1 == 2, "");],
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[])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(template alias)
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feature="template alias"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[template<int i>
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class I {
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public: int get() { return i; };
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};
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using Zero = I<0>;],
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[Zero Z;
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return Z.get();])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(lambda support)
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feature="lambda"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[],
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[auto myincr = [[]](int x) { return x + 1; };])],
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[AC_MSG_RESULT([yes])
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break],
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[AC_MSG_RESULT([no])
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continue])
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done
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AX_ISC_CPP11
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# Check for std::is_base_of support
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AC_MSG_CHECKING([for std::is_base_of])
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122
m4macros/ax_cpp11.m4
Normal file
122
m4macros/ax_cpp11.m4
Normal file
@@ -0,0 +1,122 @@
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AC_DEFUN([AX_ISC_CPP11], [
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CXX_SAVED=$CXX
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feature=
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for retry in "none" "--std=c++11" "--std=c++0x" "--std=c++1x" "fail"; do
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if test "$retry" = "fail"; then
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AC_MSG_ERROR([$feature (a C++11 feature) is not supported])
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fi
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if test "$retry" != "none"; then
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AC_MSG_WARN([unsupported C++11 feature])
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AC_MSG_NOTICE([retrying by adding $retry to $CXX])
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CXX="$CXX_SAVED $retry"
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AC_MSG_CHECKING($retry support)
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[],
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[int myincr = 1;])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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fi
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AC_MSG_CHECKING(std::unique_ptr support)
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feature="std::unique_ptr"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <memory>],
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[std::unique_ptr<int> a;])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(cbegin/cend support)
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feature="cbegin/cend"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <string>],
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[const std::string& s = "abcd";
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unsigned count = 0;
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for (std::string::const_iterator i = s.cbegin();
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i != s.cend(); ++i)
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if (*i == 'b')
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++count;])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(final method support)
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feature="final method"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[class Foo {
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public:
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virtual ~Foo() {};
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virtual void bar() final;
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};],[])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(aggregate initialization support)
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feature="aggregate initialization"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <vector>],
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[std::vector<int> foo = { 1, 2, 3};])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(variadic template support)
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feature="variadic template"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[template<typename ... Args>
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struct A {
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void foo(Args... myargs) { return; };
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};],
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[A<> a;
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a.foo();])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(static_assert support)
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feature="static_assert"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[static_assert(1 + 1 == 2, "");],
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[])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(template alias)
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feature="template alias"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[template<int i>
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class I {
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public: int get() { return i; };
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};
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using Zero = I<0>;],
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[Zero Z;
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return Z.get();])],
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[AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])
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continue])
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AC_MSG_CHECKING(lambda support)
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feature="lambda"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[],
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[auto myincr = [[]](int x) { return x + 1; };])],
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[AC_MSG_RESULT([yes])
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break],
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[AC_MSG_RESULT([no])
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continue])
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done
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])dnl AX_ISC_RPATH
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