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dnl Checks whether std::chrono::steady_clock is steady
dnl Unfortunately it is not always steady.
AC_DEFUN([CHECK_STEADY_CLOCK], [
AC_LANG_PUSH(C++)
AC_MSG_CHECKING([whether std::chrono::steady_clock is steady])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#include <chrono>
]], [[
static_assert(std::chrono::steady_clock::is_steady, "steady_clock isn't steady");
return std::chrono::steady_clock::is_steady ? 0 : 1;
]])
], [
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
AC_MSG_ERROR([a steady std::chrono::steady_clock is required])
])
AC_LANG_POP(C++)
])
|
