*

src/9c.gmi

@@ -1,3 +1,25 @@
 # 9c
 
-9c is the flavor of [[c]] used by [[plan9]].
+9c is the flavor of [[c]] used by [[plan9]].
+
+It is similar but different from ansi c.
+
+Firstly, compiling and linking are two different steps not handled by the same program.
+
+On [[sans]] you can use them by running
+
+```
+9 9c hi.c
+9 9l hi.o -o hi
+```
+
+This will compile the source file hi.c, creating hi.o
+
+Then, 9l, the linker, will create the executable hi from hi.o
+
+The prefixing 9 isn't standard to plan9, but is used on sans to avoid collisions in binary naming provided by plan9port.
+
+=> https://plan9.io/sys/doc/comp.html how to use the plan9 c compiler
+=> https://wiki.xxiivv.com/site/plan9_c.html wiki.xxiivv.com on plan9 c
+=> http://doc.cat-v.org/plan_9/programming/c_programming_in_plan_9 c programming in plan9 from bell labs
+=> https://9fans.github.io/plan9port/man/man1/9c.html plan9port 9c

src/c.gmi

@@ -4,6 +4,6 @@ compilers
 
 * [[clang]]
 * [[gcc]]
-* [[9c]] ([[plan9]]'s c)
+* [[9c]] ([[plan9]]'s flavor of c)
 * [[chibicc]]
 

src/plan9.gmi

@@ -1 +1,17 @@
-# plan9
+# plan9
+
+Plan9 is a distributed operating system from Bell Labs.
+
+Plan9 provides many interesting tools, and takes on unix. To have access to them here on [[sans]] we use plan9port to provide plan9 tools in user space.
+
+To get at them here, you'll need to prefix the command with 9, e.g.
+
+9 rc will launch rc, plan9's shell
+9 [[9c]] will launch plan9's c compiler
+9 grep will launch plan9's flavor of grep, etc.
+
+For a full list of the stuff you can use, see plan9port's documentation (linked below)
+
+=> http://9p.io/plan9/ plan9 foundation
+=> https://9fans.github.io/plan9port/ plan9port
+=> https://9fans.github.io/plan9port/man/man1/intro.html plan9port docs