build: enable C++20
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ida5402ae8d39b264fea044a510f66840cad8a90c
diff --git a/configure.ac b/configure.ac
index 47c31bb..2364585 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,7 +35,7 @@
AC_CHECK_HEADER(systemd/sd-bus.h, ,[AC_MSG_ERROR([Could not find systemd/sd-bus.h...systemd development package required])])
# Checks for typedefs, structures, and compiler characteristics.
-AX_CXX_COMPILE_STDCXX_17([noext])
+AX_CXX_COMPILE_STDCXX([20],[noext])
AX_APPEND_COMPILE_FLAGS([-flto -fPIC -Wall -Werror], [CXXFLAGS])
AX_APPEND_COMPILE_FLAGS([-flto -fPIC -Wall -Werror], [CFLAGS])