libcruft-vk/m4/nc_cxx.m4

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AC_DEFUN([NC_CXX],[
AX_CHECK_COMPILE_FLAG(
[-std=c++1z],
[AX_APPEND_FLAG([-std=c++1z], [CXXFLAGS])],
[AC_MSG_ERROR([Unable to enable c++1z])]
)
AX_APPEND_COMPILE_FLAGS([-pipe], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-fno-deduce-init-list], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-fno-deduce-init-list], [], [-Werror])
AC_C_CONST
AC_C_RESTRICT
AC_C_INLINE
AC_ARG_ENABLE([libcxx], [AS_HELP_STRING([--enable-libcxx], [use clang's cxx library])])
AS_IF([test "x${enable_libcxx}" == "xyes"], [
AX_APPEND_COMPILE_FLAGS([-stdlib=libc++])
])
AX_APPEND_COMPILE_FLAGS([-fvisibility=hidden], [], [-Werror])
])