Reorganisation of the source tree

Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

1 files changed, 55 insertions, 0 deletions

diff --git a/compiler/parser/hschooks.c b/compiler/parser/hschooks.c
new file mode 100644
index 0000000000..f3e7447a49
--- /dev/null
+++ b/compiler/parser/hschooks.c
@@ -0,0 +1,55 @@
+/*
+These routines customise the error messages
+for various bits of the RTS.  They are linked
+in instead of the defaults.
+*/
+
+/* For GHC 4.08, we are relying on the fact that RtsFlags has
+ * compatible layout with the current version, because we're
+ * #including the current version of RtsFlags.h below.  4.08 didn't
+ * ship with its own RtsFlags.h, unfortunately.   For later GHC
+ * versions, we #include the correct RtsFlags.h.
+ */
+#if __GLASGOW_HASKELL__ < 502
+#include "../includes/Rts.h"
+#include "../includes/RtsFlags.h"
+#else
+#include "Rts.h"
+#include "RtsFlags.h"
+#endif
+
+#include "HsFFI.h"
+
+#include <string.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+void
+defaultsHook (void)
+{
+    RtsFlags.GcFlags.heapSizeSuggestion = 6*1024*1024 / BLOCK_SIZE;
+    RtsFlags.GcFlags.maxStkSize         = 8*1024*1024 / sizeof(W_);
+#if __GLASGOW_HASKELL__ >= 411
+    /* GHC < 4.11 didn't have these */
+    RtsFlags.GcFlags.giveStats = COLLECT_GC_STATS;
+    RtsFlags.GcFlags.statsFile = stderr;
+#endif
+}
+
+void
+OutOfHeapHook (unsigned long request_size/* always zero these days */,
+	       unsigned long heap_size)
+    /* both in bytes */
+{
+    fprintf(stderr, "GHC's heap exhausted: current limit is %lu bytes;\nUse the `-M<size>' option to increase the total heap size.\n",
+	heap_size);
+}
+
+void
+StackOverflowHook (unsigned long stack_size)    /* in bytes */
+{
+    fprintf(stderr, "GHC stack-space overflow: current limit is %ld bytes.\nUse the `-K<size>' option to increase it.\n", stack_size);
+}
+