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-rw-r--r--src/runtime/cgo/gcc_darwin_amd64.c2
-rw-r--r--src/runtime/cgo/gcc_libinit.c1
-rw-r--r--src/runtime/cgo/gcc_setenv.c1
-rw-r--r--src/runtime/cgo/gcc_util.c2
4 files changed, 6 insertions, 0 deletions
diff --git a/src/runtime/cgo/gcc_darwin_amd64.c b/src/runtime/cgo/gcc_darwin_amd64.c
index dc679acab9..b70c83345f 100644
--- a/src/runtime/cgo/gcc_darwin_amd64.c
+++ b/src/runtime/cgo/gcc_darwin_amd64.c
@@ -2,6 +2,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
+// +build cgo
+
#include <string.h> /* for strerror */
#include <pthread.h>
#include <signal.h>
diff --git a/src/runtime/cgo/gcc_libinit.c b/src/runtime/cgo/gcc_libinit.c
index c3e94f58d2..5b9558aabc 100644
--- a/src/runtime/cgo/gcc_libinit.c
+++ b/src/runtime/cgo/gcc_libinit.c
@@ -2,6 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
+// +build cgo
// +build darwin dragonfly freebsd linux netbsd solaris
// +build !ppc64,!ppc64le
diff --git a/src/runtime/cgo/gcc_setenv.c b/src/runtime/cgo/gcc_setenv.c
index ca29dcb05f..c976ac3d37 100644
--- a/src/runtime/cgo/gcc_setenv.c
+++ b/src/runtime/cgo/gcc_setenv.c
@@ -2,6 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
+// +build cgo
// +build darwin dragonfly freebsd linux netbsd openbsd solaris
#include "libcgo.h"
diff --git a/src/runtime/cgo/gcc_util.c b/src/runtime/cgo/gcc_util.c
index 143734e94b..d5efec396b 100644
--- a/src/runtime/cgo/gcc_util.c
+++ b/src/runtime/cgo/gcc_util.c
@@ -2,6 +2,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
+// +build cgo
+
#include "libcgo.h"
/* Stub for calling malloc from Go */