[CMake] Make several libs depend on swift-syntax-generated-headers

[rintaro]

swift/Parse/Lexer.h is used by these libraries.

Fixes:

In file included from /Users/rintaro/swift-oss/swift/lib/SILGen/SILGenProfiling.cpp:18:
In file included from /Users/rintaro/swift-oss/swift/include/swift/Parse/Lexer.h:24:
In file included from /Users/rintaro/swift-oss/swift/include/swift/Syntax/TokenSyntax.h:21:
In file included from /Users/rintaro/swift-oss/swift/include/swift/Syntax/RawTokenSyntax.h:25:
/Users/rintaro/swift-oss/swift/include/swift/Syntax/RawSyntax.h:33:10: fatal error: 'swift/Syntax/SyntaxKind.h' file not found
#include "swift/Syntax/SyntaxKind.h"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

I don't think this is the ideal fix for this problem, but...

CC/ @harlanhaskins

[harlanhaskins]

What if we remove the import of TokenSyntax.h from this header and instead forward-declare RawTokenSyntax?

[rintaro]

This compiles:

--- a/include/swift/Parse/Lexer.h
+++ b/include/swift/Parse/Lexer.h
@@ -21,11 +21,17 @@
 #include "swift/Basic/SourceLoc.h"
 #include "swift/Basic/SourceManager.h"
 #include "swift/Parse/Token.h"
-#include "swift/Syntax/TokenSyntax.h"
+#include "swift/Syntax/References.h"
+#include "swift/Syntax/Trivia.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/SaveAndRestore.h"
 
 namespace swift {
+
+namespace syntax {
+  struct RawTokenSyntax;
+}
+
   /// Given a pointer to the starting byte of a UTF8 character, validate it and
   /// advance the lexer past it.  This returns the encoded character or ~0U if
   /// the encoding is invalid.

[harlanhaskins]

That looks great! I think this is a much better fix overall. There are a couple of places that also import Syntax that could be forward-declaring it too. I’d merge that as-is though.

[rintaro]

OK, opened another PR for that.
Closing.