Split nextpnr.h to allow for linear inclusion.

"nextpnr.h" is no longer the god header.  Important improvements:

 - Functions in log.h can be used without including
   BaseCtx/Arch/Context. This means that log_X functions can be called
   without included "nextpnr.h"

 - NPNR_ASSERT can be used without including "nextpnr.h" by including
   "nextpnr_assertions.h".  This allows NPNR_ASSERT to be used safely in
   any header file.

 - Types defined in "archdefs.h" are now available without including
   BaseCtx/Arch/Context.  This means that utility classes that will be
   used inside of BaseCtx/Arch/Context can be defined safely in a
   self-contained header.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/fpga_interchange/luts.h b/fpga_interchange/luts.h
index a5d3b1d0..333df36e 100644
--- a/fpga_interchange/luts.h
+++ b/fpga_interchange/luts.h
@@ -17,15 +17,17 @@
  *
  */
 
-#ifndef NEXTPNR_H
-#error Include "luts.h" via "nextpnr.h" only.
-#endif
-
-#include "dynamic_bitarray.h"
-
 #ifndef LUTS_H
 #define LUTS_H
 
+#include <unordered_map>
+#include <unordered_set>
+
+#include "idstring.h"
+#include "nextpnr_namespaces.h"
+
+#include "dynamic_bitarray.h"
+
 NEXTPNR_NAMESPACE_BEGIN
 
 struct CellInfo;