Add new toolchain for gcc-16 -- current trunk

Author: steve-downey

etc/gcc-16-toolchain.cmake

@@ -0,0 +1,13 @@
+include_guard(GLOBAL)
+
+include("${CMAKE_CURRENT_LIST_DIR}/gcc-flags.cmake")
+
+set(CMAKE_C_COMPILER gcc-16)
+set(CMAKE_CXX_COMPILER g++-16)
+
+set(CMAKE_CXX_FLAGS_ASAN
+    "${CMAKE_CXX_FLAGS_ASAN} -Wno-maybe-uninitialized"
+    CACHE STRING
+    "C++ ASAN Flags"
+    FORCE
+)