Sometimes it's amazing these haven't been turned
up by other compilers.

CHANGES

diff --git a/CHANGES b/CHANGES
index a12931e..fc81fa9 100644
--- a/CHANGES
+++ b/CHANGES
@@ -9,6 +9,8 @@
 
 	9term OpenBSD support from Markus Friedl.
 
+	More appeasement of Sun C compiler.
+
 March 25, 2004
 
 	Change putenv not to free the string after calling real putenv.

src/lib9/notify.c

diff --git a/src/lib9/notify.c b/src/lib9/notify.c
index 4d2a79e..12edb0e 100644
--- a/src/lib9/notify.c
+++ b/src/lib9/notify.c
@@ -69,7 +69,7 @@
 	struct sigaction sa;
 
 	memset(&sa, 0, sizeof sa);
-	if(f == nil)
+	if(f == 0)
 		sa.sa_handler = SIG_DFL;
 	else{
 		notifyf = f;

src/libbio/bfmt.c

diff --git a/src/libbio/bfmt.c b/src/libbio/bfmt.c
index f1b6f5a..4e0b620 100644
--- a/src/libbio/bfmt.c
+++ b/src/libbio/bfmt.c
@@ -7,7 +7,7 @@
 	Biobuf *b;
 
 	b = f->farg;
-	b->ocount = f->to - f->stop;
+	b->ocount = (char*)f->to - (char*)f->stop;
 	if(Bflush(b) < 0)
 		return 0;
 	f->to = b->ebuf+b->ocount;