[Assorted-commits] SF.net SVN: assorted:[1298] sandbox/trunk/src/c

[<yan...@us...>]

Revision: 1298
          http://assorted.svn.sourceforge.net/assorted/?rev=1298&view=rev
Author:   yangzhang
Date:     2009-03-17 07:08:58 +0000 (Tue, 17 Mar 2009)

Log Message:
-----------
simple linking demo

Added Paths:
-----------
    sandbox/trunk/src/c/linking/
    sandbox/trunk/src/c/linking/Makefile
    sandbox/trunk/src/c/linking/a.c
    sandbox/trunk/src/c/linking/a.h
    sandbox/trunk/src/c/linking/b.c

Added: sandbox/trunk/src/c/linking/Makefile
===================================================================
--- sandbox/trunk/src/c/linking/Makefile	                        (rev 0)
+++ sandbox/trunk/src/c/linking/Makefile	2009-03-17 07:08:58 UTC (rev 1298)
@@ -0,0 +1,4 @@
+all: a
+a: a.o b.o
+clean:
+	rm -f *.o a

Added: sandbox/trunk/src/c/linking/a.c
===================================================================
--- sandbox/trunk/src/c/linking/a.c	                        (rev 0)
+++ sandbox/trunk/src/c/linking/a.c	2009-03-17 07:08:58 UTC (rev 1298)
@@ -0,0 +1,2 @@
+#include "a.h"
+int main() { foo(); bar(); return 0; }

Added: sandbox/trunk/src/c/linking/a.h
===================================================================
--- sandbox/trunk/src/c/linking/a.h	                        (rev 0)
+++ sandbox/trunk/src/c/linking/a.h	2009-03-17 07:08:58 UTC (rev 1298)
@@ -0,0 +1,14 @@
+// Must either make static or leave extern but only the decl (no def), or else you'll get:
+//
+// $ make
+// cc    -c -o a.o a.c
+// cc    -c -o b.o b.c
+// cc   a.o b.o   -o a
+// b.o: In function `foo':
+// b.c:(.text+0x0): multiple definition of `foo'
+// a.o:a.c:(.text+0x0): first defined here
+// collect2: ld returned 1 exit status
+// make: *** [a] Error 1
+
+static int foo() { return 0; }
+int bar();

Added: sandbox/trunk/src/c/linking/b.c
===================================================================
--- sandbox/trunk/src/c/linking/b.c	                        (rev 0)
+++ sandbox/trunk/src/c/linking/b.c	2009-03-17 07:08:58 UTC (rev 1298)
@@ -0,0 +1,3 @@
+#include "a.h"
+int bar() { return 0; }
+int b() { foo(); bar(); return 0; }


This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.