libgo/misc/cgo/testsovar/cgoso.go

   1 // Copyright 2015 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package cgosotest
   6
   7 // This test verifies that Go can access C variables
   8 // in shared object file via cgo.
   9
  10 /*
  11 // intentionally write the same LDFLAGS differently
  12 // to test correct handling of LDFLAGS.
  13 #cgo windows CFLAGS: -DIMPORT_DLL
  14 #cgo linux LDFLAGS: -L. -lcgosotest
  15 #cgo dragonfly LDFLAGS: -L. -l cgosotest
  16 #cgo freebsd LDFLAGS: -L. -l cgosotest
  17 #cgo openbsd LDFLAGS: -L. -l cgosotest
  18 #cgo solaris LDFLAGS: -L. -lcgosotest
  19 #cgo netbsd LDFLAGS: -L. libcgosotest.so
  20 #cgo darwin LDFLAGS: -L. libcgosotest.dylib
  21 #cgo windows LDFLAGS: -L. libcgosotest.dll
  22
  23 #include "cgoso_c.h"
  24
  25 const char* getVar() {
  26             return exported_var;
  27 }
  28 */
  29 import "C"
  30
  31 import "fmt"
  32
  33 func Test() {
  34         const want = "Hello world"
  35         got := C.GoString(C.getVar())
  36         if got != want {
  37                 panic(fmt.Sprintf("testExportedVar: got %q, but want %q", got, want))
  38         }
  39         got = C.GoString(C.exported_var)
  40         if got != want {
  41                 panic(fmt.Sprintf("testExportedVar: got %q, but want %q", got, want))
  42         }
  43 }