github.com/ader1990/go@v0.0.0-20140630135419-8c24447fa791/src/pkg/runtime/cgo/iscgo.c (about)

     1  // Copyright 2010 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  // The runtime package contains an uninitialized definition
     6  // for runtime·iscgo.  Override it to tell the runtime we're here.
     7  // There are various function pointers that should be set too,
     8  // but those depend on dynamic linker magic to get initialized
     9  // correctly, and sometimes they break.  This variable is a
    10  // backup: it depends only on old C style static linking rules.
    11  
    12  #include "../runtime.h"
    13  
    14  bool runtime·iscgo = 1;
    15  uint32 runtime·needextram = 1;  // create an extra M on first cgo call