Small test program to test parameters.

src/test/kc/library/example1/lib.asm

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+  // File Comments
+/* compile with C64 */
+  // Library
+.namespace lib {
+  // Upstart
+.cpu _65c02
+  
+#if __asm_import__
+#else
+.segmentdef Code                    [start=$80d]
+.segmentdef Data                    [startAfter="Code"]
+#endif
+  // Global Constants & labels
+.segment Code
+  // plus
+// __zp(2) char plus(__zp(2) char a, __zp(2) char b)
+plus: {
+    .label a = 2
+    .label b = 2
+    .label return = 2
+    .label plus__0 = 2
+    // a+b
+    // [0] plus::$0 = plus::a + plus::b -- vbuz1=vbuz1_plus_vbuz1 
+    lda.z plus__0
+    asl
+    sta.z plus__0
+    // return a+b;
+    // [1] plus::return = plus::$0
+    // plus::@return
+    // }
+    // [2] return 
+    rts
+}
+  // File Data
+}

src/test/kc/library/example1/lib.c

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+/* compile with C64 */
+
+#pragma link("lib.ld")
+#pragma encoding(screencode_mixed)
+#pragma var_model(zp)
+#pragma asm_library("lib")
+#pragma asm_export("lib", __varcall, plus)
+
+char plus(char a, char b) {
+    return a+b;
+}

src/test/kc/library/example1/lib.ld

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+
+#if __asm_import__
+#else
+.segmentdef Code                    [start=%P]
+.segmentdef Data                    [startAfter="Code"]
+#endif

src/test/kc/library/example1/lib_proto.h

@@ -0,0 +1 @@
+extern __varcall __asm_import(lib) __zp(2) char plus(__zp(2) char a, __zp(2) char b);

src/test/kc/library/example1/main.c

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+
+#include "lib_proto.h"
+
+__export char r;
+
+void main() {
+
+    r = plus(4,5);
+}