first attempt at real FFI support.

in a .6 file, an export line

	//ffi T localfib remotefib remote.so

means the dynamic linker should initialize
localfib, always a pointer, to the address of
remotefib, either text (T) or data (D) after
loading remote.so.

the C compiler will generate an export section
when given the pragmas

	#pragma package fib
	#pragma ffi T localfib remotefib remote.so

needing #pragma package is a bit of a kludge
and hopefully could go away later.

this is just the 6 tool chain support.
other architectures will happen once 6 settles down.

code using this to do FFI is in a later CL.

R=r
DELTA=161  (141 added, 14 deleted, 6 changed)
OCL=33783
CL=33795

1 files changed, 14 insertions, 0 deletions

diff --git a/src/cmd/cc/lexbody b/src/cmd/cc/lexbody
index 33734c722..1c979a0f1 100644
--- a/src/cmd/cc/lexbody
+++ b/src/cmd/cc/lexbody
@@ -47,6 +47,20 @@ pragvararg(void)
 }
 
 void
+pragffi(void)
+{
+	while(getnsc() != '\n')
+		;
+}
+
+void
+pragpackage(void)
+{
+	while(getnsc() != '\n')
+		;
+}
+
+void
 pragfpround(void)
 {
 	while(getnsc() != '\n')