ch2-07: 实现一个例子

.gitignore

@@ -23,3 +23,9 @@ _obj
 
 # macOS
 .DS_Store
+
+*.so
+*.dll
+*.obj
+*.o
+a.out

examples/ch2-07/hello-so/Makefile

@@ -0,0 +1,8 @@
+default:
+	go build -buildmode=c-shared -o say-hello.so main.go
+	gcc -Wall _test_so.c ./say-hello.so
+	./a.out
+
+clean:
+	-rm *.so
+	-rm *.out

examples/ch2-07/hello-so/_test_so.c

@@ -0,0 +1,7 @@
+#include "say-hello.h"
+#include <stdio.h>
+
+int main() {
+	SayHello("gopher");
+	return 0;
+}

examples/ch2-07/hello-so/main.go

@@ -0,0 +1,11 @@
+package main
+
+import "C"
+import "fmt"
+
+func main() {}
+
+//export SayHello
+func SayHello(name *C.char) {
+	fmt.Printf("hello %s!\n", C.GoString(name))
+}

examples/ch2-07/hello-so/say-hello.h

@@ -0,0 +1,60 @@
+/* Created by "go tool cgo" - DO NOT EDIT. */
+
+/* package command-line-arguments */
+
+/* Start of preamble from import "C" comments.  */
+
+
+
+
+/* End of preamble from import "C" comments.  */
+
+
+/* Start of boilerplate cgo prologue.  */
+#line 1 "cgo-gcc-export-header-prolog"
+
+#ifndef GO_CGO_PROLOGUE_H
+#define GO_CGO_PROLOGUE_H
+
+typedef signed char GoInt8;
+typedef unsigned char GoUint8;
+typedef short GoInt16;
+typedef unsigned short GoUint16;
+typedef int GoInt32;
+typedef unsigned int GoUint32;
+typedef long long GoInt64;
+typedef unsigned long long GoUint64;
+typedef GoInt64 GoInt;
+typedef GoUint64 GoUint;
+typedef __SIZE_TYPE__ GoUintptr;
+typedef float GoFloat32;
+typedef double GoFloat64;
+typedef float _Complex GoComplex64;
+typedef double _Complex GoComplex128;
+
+/*
+  static assertion to make sure the file is being used on architecture
+  at least with matching size of GoInt.
+*/
+typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void*)==64/8 ? 1:-1];
+
+typedef struct { const char *p; GoInt n; } GoString;
+typedef void *GoMap;
+typedef void *GoChan;
+typedef struct { void *t; void *v; } GoInterface;
+typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
+
+#endif
+
+/* End of boilerplate cgo prologue.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+extern void SayHello(char* p0);
+
+#ifdef __cplusplus
+}
+#endif