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-rw-r--r--m4/ax_cxx_compile_stdcxx.m445
-rw-r--r--m4/ax_pthread.m442
2 files changed, 47 insertions, 40 deletions
diff --git a/m4/ax_cxx_compile_stdcxx.m4 b/m4/ax_cxx_compile_stdcxx.m4
index 5032bba80..43087b2e6 100644
--- a/m4/ax_cxx_compile_stdcxx.m4
+++ b/m4/ax_cxx_compile_stdcxx.m4
@@ -33,19 +33,19 @@
# Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
# Copyright (c) 2015 Paul Norman <penorman@mac.com>
# Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu>
-# Copyright (c) 2016 Krzesimir Nowak <qdlacz@gmail.com>
+# Copyright (c) 2016, 2018 Krzesimir Nowak <qdlacz@gmail.com>
+# Copyright (c) 2019 Enji Cooper <yaneurabeya@gmail.com>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
-#serial 7
+#serial 11
dnl This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro
dnl (serial version number 13).
-AX_REQUIRE_DEFINED([AC_MSG_WARN])
AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
m4_if([$1], [11], [ax_cxx_compile_alternatives="11 0x"],
[$1], [14], [ax_cxx_compile_alternatives="14 1y"],
@@ -61,14 +61,6 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
[m4_fatal([invalid third argument `$3' to AX_CXX_COMPILE_STDCXX])])
AC_LANG_PUSH([C++])dnl
ac_success=no
- AC_CACHE_CHECK(whether $CXX supports C++$1 features by default,
- ax_cv_cxx_compile_cxx$1,
- [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
- [ax_cv_cxx_compile_cxx$1=yes],
- [ax_cv_cxx_compile_cxx$1=no])])
- if test x$ax_cv_cxx_compile_cxx$1 = xyes; then
- ac_success=yes
- fi
m4_if([$2], [noext], [], [dnl
if test x$ac_success = xno; then
@@ -139,7 +131,6 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
[define if the compiler supports basic C++$1 syntax])
fi
AC_SUBST(HAVE_CXX$1)
- m4_if([$1], [17], [AC_MSG_WARN([C++17 is not yet standardized, so the checks may change in incompatible ways anytime])])
])
@@ -199,11 +190,13 @@ namespace cxx11
struct Base
{
+ virtual ~Base() {}
virtual void f() {}
};
struct Derived : public Base
{
+ virtual ~Derived() override {}
virtual void f() override {}
};
@@ -587,20 +580,12 @@ m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_17], [[
#error "This is not a C++ compiler"
-#elif __cplusplus <= 201402L
+#elif __cplusplus < 201703L
#error "This is not a C++17 compiler"
#else
-#if defined(__clang__)
- #define REALLY_CLANG
-#else
- #if defined(__GNUC__)
- #define REALLY_GCC
- #endif
-#endif
-
#include <initializer_list>
#include <utility>
#include <type_traits>
@@ -608,16 +593,12 @@ m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_17], [[
namespace cxx17
{
-#if !defined(REALLY_CLANG)
namespace test_constexpr_lambdas
{
- // TODO: test it with clang++ from git
-
constexpr int foo = [](){return 42;}();
}
-#endif // !defined(REALLY_CLANG)
namespace test::nested_namespace::definitions
{
@@ -852,12 +833,9 @@ namespace cxx17
}
-#if !defined(REALLY_CLANG)
namespace test_template_argument_deduction_for_class_templates
{
- // TODO: test it with clang++ from git
-
template <typename T1, typename T2>
struct pair
{
@@ -876,7 +854,6 @@ namespace cxx17
}
}
-#endif // !defined(REALLY_CLANG)
namespace test_non_type_auto_template_parameters
{
@@ -890,12 +867,9 @@ namespace cxx17
}
-#if !defined(REALLY_CLANG)
namespace test_structured_bindings
{
- // TODO: test it with clang++ from git
-
int arr[2] = { 1, 2 };
std::pair<int, int> pr = { 1, 2 };
@@ -927,14 +901,10 @@ namespace cxx17
const auto [ x3, y3 ] = f3();
}
-#endif // !defined(REALLY_CLANG)
-#if !defined(REALLY_CLANG)
namespace test_exception_spec_type_system
{
- // TODO: test it with clang++ from git
-
struct Good {};
struct Bad {};
@@ -952,7 +922,6 @@ namespace cxx17
static_assert (std::is_same_v<Good, decltype(f(g1, g2))>);
}
-#endif // !defined(REALLY_CLANG)
namespace test_inline_variables
{
@@ -977,6 +946,6 @@ namespace cxx17
} // namespace cxx17
-#endif // __cplusplus <= 201402L
+#endif // __cplusplus < 201703L
]])
diff --git a/m4/ax_pthread.m4 b/m4/ax_pthread.m4
index 5fbf9fe0d..07a9cd265 100644
--- a/m4/ax_pthread.m4
+++ b/m4/ax_pthread.m4
@@ -82,7 +82,8 @@
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
-#serial 24
+#serial 25
+#arctica-serial 1
AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
AC_DEFUN([AX_PTHREAD], [
@@ -334,6 +335,42 @@ for ax_pthread_try_flag in $ax_pthread_flags; do
PTHREAD_LIBS="-lpthread"
;;
+ -pthread)
+ AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
+ PTHREAD_CFLAGS="$ax_pthread_try_flag"
+
+ if test "x$GCC" = "xyes"; then
+ # Thanks to libtool bug #13550, we have to consider the possibility
+ # that -nostdlib will be used during compilation at some point.
+ # Try to determine the first pthread library available,
+ # ignoring any other variants.
+ for ax_pthread_try_lib_flag in $ax_pthread_flags; do
+ case $ax_pthread_try_lib_flag in
+ none|-*|pthread-config)
+ continue
+ ;;
+
+ *)
+ PTHREAD_LIBS="-l$ax_pthread_try_lib_flag"
+
+ ax_pthread_save_LIBS="$LIBS"
+ LIBS="$PTHREAD_LIBS $LIBS"
+
+ # We only need to link a trivial program with
+ # the current library value.
+ # Linking should fail if the library doesn't
+ # exist, otherwise we should be good to go.
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
+ [LIBS="$ax_pthread_save_LIBS"
+ break],
+ [LIBS="$ax_pthread_save_LIBS"
+ PTHREAD_LIBS=""])
+ ;;
+ esac
+ done
+ fi
+ ;;
+
-*)
AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
PTHREAD_CFLAGS="$ax_pthread_try_flag"
@@ -438,7 +475,8 @@ if test "x$ax_pthread_ok" = "xyes"; then
AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
[ax_cv_PTHREAD_PRIO_INHERIT],
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
- [[int i = PTHREAD_PRIO_INHERIT;]])],
+ [[int i = PTHREAD_PRIO_INHERIT;
+ return i;]])],
[ax_cv_PTHREAD_PRIO_INHERIT=yes],
[ax_cv_PTHREAD_PRIO_INHERIT=no])
])