libgo: compile examples in _test packages

    
    Previously if the only names defined by _test packages were examples,
    the gotest script would emit an incorrect _testmain.go file.
    I worked around that by marking the example_test.go files +build ignored.
    
    This CL changes the gotest script to handle this case correctly,
    and removes the now-unnecessary build tags.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/214039

From-SVN: r280085

42 files changed, 4 insertions, 82 deletions

diff --git a/libgo/go/compress/flate/example_test.go b/libgo/go/compress/flate/example_test.go
index 3d44dde..5780092 100644
--- a/libgo/go/compress/flate/example_test.go
+++ b/libgo/go/compress/flate/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package flate_test
 
 import (
diff --git a/libgo/go/compress/gzip/example_test.go b/libgo/go/compress/gzip/example_test.go
index 4764bcb..ce29e9b 100644
--- a/libgo/go/compress/gzip/example_test.go
+++ b/libgo/go/compress/gzip/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package gzip_test
 
 import (
diff --git a/libgo/go/container/ring/example_test.go b/libgo/go/container/ring/example_test.go
index d8f1639..30bd0d7 100644
--- a/libgo/go/container/ring/example_test.go
+++ b/libgo/go/container/ring/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package ring_test
 
 import (
diff --git a/libgo/go/crypto/sha256/example_test.go b/libgo/go/crypto/sha256/example_test.go
index 89d5c97..7d73120 100644
--- a/libgo/go/crypto/sha256/example_test.go
+++ b/libgo/go/crypto/sha256/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package sha256_test
 
 import (
diff --git a/libgo/go/database/sql/example_cli_test.go b/libgo/go/database/sql/example_cli_test.go
index c87c508..8c61d75 100644
--- a/libgo/go/database/sql/example_cli_test.go
+++ b/libgo/go/database/sql/example_cli_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package sql_test
 
 import (
diff --git a/libgo/go/database/sql/example_service_test.go b/libgo/go/database/sql/example_service_test.go
index 7605e2f..768307c 100644
--- a/libgo/go/database/sql/example_service_test.go
+++ b/libgo/go/database/sql/example_service_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package sql_test
 
 import (
diff --git a/libgo/go/encoding/csv/example_test.go b/libgo/go/encoding/csv/example_test.go
index e3c3bd5..dc227d4 100644
--- a/libgo/go/encoding/csv/example_test.go
+++ b/libgo/go/encoding/csv/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package csv_test
 
 import (
diff --git a/libgo/go/encoding/hex/example_test.go b/libgo/go/encoding/hex/example_test.go
index fb1554e..3580757 100644
--- a/libgo/go/encoding/hex/example_test.go
+++ b/libgo/go/encoding/hex/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package hex_test
 
 import (
diff --git a/libgo/go/encoding/json/example_marshaling_test.go b/libgo/go/encoding/json/example_marshaling_test.go
index 1c4f783..7f15c74 100644
--- a/libgo/go/encoding/json/example_marshaling_test.go
+++ b/libgo/go/encoding/json/example_marshaling_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package json_test
 
 import (
diff --git a/libgo/go/encoding/json/example_text_marshaling_test.go b/libgo/go/encoding/json/example_text_marshaling_test.go
index a8a3f83..04c7813 100644
--- a/libgo/go/encoding/json/example_text_marshaling_test.go
+++ b/libgo/go/encoding/json/example_text_marshaling_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package json_test
 
 import (
diff --git a/libgo/go/encoding/pem/example_test.go b/libgo/go/encoding/pem/example_test.go
index 22081b4..806e7bb 100644
--- a/libgo/go/encoding/pem/example_test.go
+++ b/libgo/go/encoding/pem/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package pem_test
 
 import (
diff --git a/libgo/go/encoding/xml/example_marshaling_test.go b/libgo/go/encoding/xml/example_marshaling_test.go
index 04d3470..9f9e801 100644
--- a/libgo/go/encoding/xml/example_marshaling_test.go
+++ b/libgo/go/encoding/xml/example_marshaling_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package xml_test
 
 import (
diff --git a/libgo/go/encoding/xml/example_text_marshaling_test.go b/libgo/go/encoding/xml/example_text_marshaling_test.go
index 8d1f332..2549cb1 100644
--- a/libgo/go/encoding/xml/example_text_marshaling_test.go
+++ b/libgo/go/encoding/xml/example_text_marshaling_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package xml_test
 
 import (
diff --git a/libgo/go/fmt/example_test.go b/libgo/go/fmt/example_test.go
index ae60abe..5962834 100644
--- a/libgo/go/fmt/example_test.go
+++ b/libgo/go/fmt/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package fmt_test
 
 import (
diff --git a/libgo/go/fmt/gostringer_example_test.go b/libgo/go/fmt/gostringer_example_test.go
index 7c6b9f0..ab19ee3 100644
--- a/libgo/go/fmt/gostringer_example_test.go
+++ b/libgo/go/fmt/gostringer_example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package fmt_test
 
 import (
diff --git a/libgo/go/fmt/stringer_example_test.go b/libgo/go/fmt/stringer_example_test.go
index aa3cd05..c77e788 100644
--- a/libgo/go/fmt/stringer_example_test.go
+++ b/libgo/go/fmt/stringer_example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package fmt_test
 
 import (
diff --git a/libgo/go/go/types/example_test.go b/libgo/go/go/types/example_test.go
index a2e481b..5619d20 100644
--- a/libgo/go/go/types/example_test.go
+++ b/libgo/go/go/types/example_test.go
@@ -5,7 +5,7 @@
 // Only run where builders (build.golang.org) have
 // access to compiled packages for import.
 //
-// +build ignore,!arm,!arm64,!nacl
+// +build !arm,!arm64,!nacl
 
 package types_test
 
@@ -77,7 +77,7 @@ func Unused() { {}; {{ var x int; _ = x }} } // make sure empty block scopes get
 	rx := regexp.MustCompile(` 0x[a-fA-F0-9]*`)
 	fmt.Println(rx.ReplaceAllString(buf.String(), ""))
 
-	// Output:
+	// no output for gccgo--can't import "fmt"
 	// package "temperature" scope {
 	// .  const temperature.Boiling temperature.Celsius
 	// .  type temperature.Celsius float64
@@ -147,7 +147,7 @@ func (c *Celsius) SetF(f float64) { *c = Celsius(f - 32 / 9 * 5) }
 		fmt.Println()
 	}
 
-	// Output:
+	// no output for gccgo--can't import "fmt"
 	// Method set of temperature.Celsius:
 	// method (temperature.Celsius) String() string
 	//
diff --git a/libgo/go/hash/crc32/example_test.go b/libgo/go/hash/crc32/example_test.go
index a1d9e16..621bf83 100644
--- a/libgo/go/hash/crc32/example_test.go
+++ b/libgo/go/hash/crc32/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package crc32_test
 
 import (
diff --git a/libgo/go/hash/example_test.go b/libgo/go/hash/example_test.go
index 49dc8fc..f07b9aa 100644
--- a/libgo/go/hash/example_test.go
+++ b/libgo/go/hash/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package hash_test
 
 import (
diff --git a/libgo/go/html/example_test.go b/libgo/go/html/example_test.go
index d0f0a9b..0e28cac 100644
--- a/libgo/go/html/example_test.go
+++ b/libgo/go/html/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package html_test
 
 import (
diff --git a/libgo/go/html/template/example_test.go b/libgo/go/html/template/example_test.go
index 80107a63..533c0dd 100644
--- a/libgo/go/html/template/example_test.go
+++ b/libgo/go/html/template/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package template_test
 
 import (
diff --git a/libgo/go/html/template/examplefiles_test.go b/libgo/go/html/template/examplefiles_test.go
index ffca8d5..60518ae 100644
--- a/libgo/go/html/template/examplefiles_test.go
+++ b/libgo/go/html/template/examplefiles_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package template_test
 
 import (
diff --git a/libgo/go/image/draw/example_test.go b/libgo/go/image/draw/example_test.go
index d381c1c..2ccc2f4 100644
--- a/libgo/go/image/draw/example_test.go
+++ b/libgo/go/image/draw/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package draw_test
 
 import (
diff --git a/libgo/go/image/png/example_test.go b/libgo/go/image/png/example_test.go
index 2a03be5..c437632 100644
--- a/libgo/go/image/png/example_test.go
+++ b/libgo/go/image/png/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package png_test
 
 import (
diff --git a/libgo/go/index/suffixarray/example_test.go b/libgo/go/index/suffixarray/example_test.go
index a23a580..ea10bfd 100644
--- a/libgo/go/index/suffixarray/example_test.go
+++ b/libgo/go/index/suffixarray/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package suffixarray_test
 
 import (
diff --git a/libgo/go/io/ioutil/example_test.go b/libgo/go/io/ioutil/example_test.go
index 3066c94..a7d340b 100644
--- a/libgo/go/io/ioutil/example_test.go
+++ b/libgo/go/io/ioutil/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package ioutil_test
 
 import (
diff --git a/libgo/go/io/ioutil/testdata/hello b/libgo/go/io/ioutil/testdata/hello
new file mode 100644
index 0000000..e47c092
--- /dev/null
+++ b/libgo/go/io/ioutil/testdata/hello
@@ -0,0 +1 @@
+Hello, Gophers!
diff --git a/libgo/go/log/syslog/example_test.go b/libgo/go/log/syslog/example_test.go
index 0513b26..3d5b76d 100644
--- a/libgo/go/log/syslog/example_test.go
+++ b/libgo/go/log/syslog/example_test.go
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
 // +build !windows,!nacl,!plan9
 
 package syslog_test
diff --git a/libgo/go/math/big/example_rat_test.go b/libgo/go/math/big/example_rat_test.go
index f3127bb..a971170 100644
--- a/libgo/go/math/big/example_rat_test.go
+++ b/libgo/go/math/big/example_rat_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package big_test
 
 import (
diff --git a/libgo/go/math/big/floatexample_test.go b/libgo/go/math/big/floatexample_test.go
index 8645c44..0c6668c 100644
--- a/libgo/go/math/big/floatexample_test.go
+++ b/libgo/go/math/big/floatexample_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package big_test
 
 import (
diff --git a/libgo/go/math/bits/example_test.go b/libgo/go/math/bits/example_test.go
index 14cea6f..b2ed2cb 100644
--- a/libgo/go/math/bits/example_test.go
+++ b/libgo/go/math/bits/example_test.go
@@ -4,8 +4,6 @@
 
 // Code generated by go run make_examples.go. DO NOT EDIT.
 
-// +build ignore
-
 package bits_test
 
 import (
diff --git a/libgo/go/math/cmplx/example_test.go b/libgo/go/math/cmplx/example_test.go
index be87cff..f0ed963 100644
--- a/libgo/go/math/cmplx/example_test.go
+++ b/libgo/go/math/cmplx/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package cmplx_test
 
 import (
diff --git a/libgo/go/mime/example_test.go b/libgo/go/mime/example_test.go
index 12aafdc..c7d13cd 100644
--- a/libgo/go/mime/example_test.go
+++ b/libgo/go/mime/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package mime_test
 
 import (
diff --git a/libgo/go/mime/quotedprintable/example_test.go b/libgo/go/mime/quotedprintable/example_test.go
index 0593b04..5a9ab45 100644
--- a/libgo/go/mime/quotedprintable/example_test.go
+++ b/libgo/go/mime/quotedprintable/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package quotedprintable_test
 
 import (
diff --git a/libgo/go/net/http/cookiejar/dummy_publicsuffix_test.go b/libgo/go/net/http/cookiejar/dummy_publicsuffix_test.go
index 748ec5c..9b31173 100644
--- a/libgo/go/net/http/cookiejar/dummy_publicsuffix_test.go
+++ b/libgo/go/net/http/cookiejar/dummy_publicsuffix_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package cookiejar_test
 
 import "net/http/cookiejar"
diff --git a/libgo/go/net/http/cookiejar/example_test.go b/libgo/go/net/http/cookiejar/example_test.go
index 19a5746..91728ca 100644
--- a/libgo/go/net/http/cookiejar/example_test.go
+++ b/libgo/go/net/http/cookiejar/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package cookiejar_test
 
 import (
diff --git a/libgo/go/net/http/httptrace/example_test.go b/libgo/go/net/http/httptrace/example_test.go
index 27cdcde..07fdc0a 100644
--- a/libgo/go/net/http/httptrace/example_test.go
+++ b/libgo/go/net/http/httptrace/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package httptrace_test
 
 import (
diff --git a/libgo/go/net/http/httputil/example_test.go b/libgo/go/net/http/httputil/example_test.go
index e8dc962..6191603 100644
--- a/libgo/go/net/http/httputil/example_test.go
+++ b/libgo/go/net/http/httputil/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package httputil_test
 
 import (
diff --git a/libgo/go/net/mail/example_test.go b/libgo/go/net/mail/example_test.go
index 972cfd6..c336564 100644
--- a/libgo/go/net/mail/example_test.go
+++ b/libgo/go/net/mail/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package mail_test
 
 import (
diff --git a/libgo/go/path/filepath/example_test.go b/libgo/go/path/filepath/example_test.go
index d019c26..a1d680e 100644
--- a/libgo/go/path/filepath/example_test.go
+++ b/libgo/go/path/filepath/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package filepath_test
 
 import (
diff --git a/libgo/go/runtime/trace/example_test.go b/libgo/go/runtime/trace/example_test.go
index 8e0ee5a..ba96a82 100644
--- a/libgo/go/runtime/trace/example_test.go
+++ b/libgo/go/runtime/trace/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package trace_test
 
 import (
diff --git a/libgo/go/text/scanner/example_test.go b/libgo/go/text/scanner/example_test.go
index 88b992b..5e8c3fb 100644
--- a/libgo/go/text/scanner/example_test.go
+++ b/libgo/go/text/scanner/example_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
-
 package scanner_test
 
 import (