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-rw-r--r--configure.ac3
1 files changed, 3 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 9f9336a83c..99d38edf48 100644
--- a/configure.ac
+++ b/configure.ac
@@ -161,6 +161,9 @@ AM_CONDITIONAL(USE_CLANGPP, test "X${CLANGPP}" = "Xyes")
# Check for C++11 features support
AX_ISC_CPP11
+# Check for C++20 compiler support.
+AX_ISC_CPP20
+
# Check for std::is_base_of support
AC_MSG_CHECKING([for std::is_base_of])
AC_COMPILE_IFELSE(