VERIFY XXX HEADER SETS

The verification target has its :prop_tgt:EXCLUDE_FROM_ALL and :prop_tgt:DISABLE_PRECOMPILE_HEADERS properties set to true, and its :prop_tgt:AUTOMOC, :prop_tgt:AUTORCC, :prop_tgt:AUTOUIC, :prop_tgt:UNITY_BUILD, and :prop_tgt:CXX_SCAN_FOR_MODULES properties set to false.

If the header's :prop_sf:LANGUAGE property is set, the value of that property is used to determine the language with which to compile the header file. The supported languages are C, CXX, OBJC, and OBJCXX. If the language is not one of those four, the header file is not compiled.

Otherwise, the language is inferred from the target's sources using the following precedence: OBJCXX takes priority over all others; if both CXX and OBJC sources are present, the header is compiled as OBJCXX; otherwise CXX takes precedence over OBJC, and OBJC takes precedence over C. If no matching sources are found, the same precedence is applied to the globally enabled languages. If no supported language is found, the header file is not compiled.

If the header's :prop_sf:SKIP_LINTING property is set to true, the file is not compiled.

If |THIS_PROPERTY| and |COMPLEMENTARY_PROPERTY| are both set to true, headers belonging to PUBLIC file sets will be verified twice, but with different conditions. The compiler flags used for private and interface contexts can be different, leading to the compiler interpreting the contents of the header differently.

A top-level target called |THIS_ALL_TARGET| is created which depends on all |xxx| verification targets. Another target called all_verify_header_sets is also created which depends on |THIS_ALL_TARGET|, and on |COMPLEMENTARY_ALL_TARGET| if it exists (see |COMPLEMENTARY_PROPERTY|).

This property is initialized by the value of the |INIT_VARIABLE| variable if it is set when a target is created.

If the project wishes to control which header sets are verified by this property, it can set |SETS_TO_VERIFY_PROPERTY|.