cmake: compiler: Add nostdincxx property for gcc

This commit adds the `nostdincxx` C++ compiler property for GCC, which
is specified when the C++ standard library (`CONFIG_LIB_CPLUSPLUS`) is
disabled.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

cmake/compiler/gcc/compiler_flags.cmake

@@ -120,6 +120,8 @@ if (NOT CONFIG_NEWLIB_LIBC AND
   set_compiler_property(APPEND PROPERTY nostdinc_include ${NOSTDINC})
 endif()
 
+set_compiler_property(TARGET compiler-cpp PROPERTY nostdincxx "-nostdinc++")
+
 # Required C++ flags when using gcc
 set_property(TARGET compiler-cpp PROPERTY required "-fcheck-new")