code review 5731048: misc/cgo: re-enable some tests

src/cmd/dist/build.c

 // Copyright 2012 The Go Authors.  All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 #include "a.h"
 #include "arg.h"
 
 /*
  * Initialization for any invocation.
  */
@@ skipping 32 matching lines @@
 
 // The known operating systems.
 static char *okgoos[] = {
         "darwin",
         "linux",
         "freebsd",
         "netbsd",
         "openbsd",
         "plan9",
         "windows",
+};
+
+// The known cgo-enabled combinations.
+// This list is also known to ../../pkg/go/build/build.go.
+static char *okcgo[] = {
+        "darwin/386",
+        "darwin/amd64",
+        "linux/386",
+        "linux/amd64",
+        "freebsd/386",
+        "freebsd/amd64",
+        "windows/386",
+        "windows/amd64",
 };
 
 static void rmworkdir(void);
 
 // find reports the first index of p in l[0:n], or else -1.
 int
 find(char *p, char **l, int n)
 {
         int i;
 
@@ skipping 1238 matching lines @@
 
         xprintf(format, "GOROOT", goroot);
         xprintf(format, "GOBIN", gobin);
         xprintf(format, "GOARCH", goarch);
         xprintf(format, "GOOS", goos);
         xprintf(format, "GOHOSTARCH", gohostarch);
         xprintf(format, "GOHOSTOS", gohostos);
         xprintf(format, "GOTOOLDIR", tooldir);
         xprintf(format, "GOCHAR", gochar);
 
+        if(find(bprintf(&b, "%s/%s", goos, goarch), okcgo, nelem(okcgo)))
+                xprintf(format, "CGO_ENABLED", "1");
+        else
+                xprintf(format, "CGO_ENABLED", "0");
+
         if(pflag) {
                 sep = ":";
                 if(streq(gohostos, "windows"))
                         sep = ";";
                 xgetenv(&b, "PATH");
                 bprintf(&b1, "%s%s%s", gobin, sep, bstr(&b));
                 xprintf(format, "PATH", bstr(&b1));
         }
 
         bfree(&b);
@@ skipping 198 matching lines @@
                 break;
         default:
                 usage();
         }ARGEND
 
         if(argc > 0)
                 usage();
 
         xprintf("%s\n", goversion);
 }