Build tweaks - fixes #484

* disable CGO for static builds everywhere
  * override Version in release build script
  * don't output symbol table in release binaries

Makefile

@@ -68,7 +68,7 @@ serve:	website
 tag:	doc
 	@echo "Old tag is $(LAST_TAG)"
 	@echo "New tag is $(NEW_TAG)"
-	echo -e "package fs\n\n// Version of rclone\nconst Version = \"$(NEW_TAG)\"\n" | gofmt > fs/version.go
+	echo -e "package fs\n\n// Version of rclone\nvar Version = \"$(NEW_TAG)\"\n" | gofmt > fs/version.go
 	perl -lpe 's/VERSION/${NEW_TAG}/g; s/DATE/'`date -I`'/g;' docs/content/downloads.md.in > docs/content/downloads.md
 	git tag $(NEW_TAG)
 	@echo "Add this to changelog in docs/content/changelog.md"

cross-compile

@@ -13,7 +13,10 @@ VERSION="$1"
 
 rm -rf build
 
-gox -output "build/{{.Dir}}-${VERSION}-{{.OS}}-{{.Arch}}/{{.Dir}}" -os "darwin linux freebsd openbsd windows freebsd netbsd plan9 solaris"
+# Disable CGO and dynamic builds on all platforms (including build patform)
+export CGO_ENABLED=0
+
+gox --ldflags "-s -X github.com/ncw/rclone/fs.Version=${VERSION}" -output "build/{{.Dir}}-${VERSION}-{{.OS}}-{{.Arch}}/{{.Dir}}" -os "darwin linux freebsd openbsd windows freebsd netbsd plan9 solaris"
 # Not implemented yet: nacl dragonfly android
 # gox -osarch-list for definitive list
 

fs/fs.go

@@ -14,8 +14,6 @@ import (
 
 // Constants
 const (
-	// UserAgent for Fs which can set it
-	UserAgent = "rclone/" + Version
 	// ModTimeNotSupported is a very large precision value to show
 	// mod time isn't supported on this Fs
 	ModTimeNotSupported = 100 * 365 * 24 * time.Hour
@@ -25,6 +23,8 @@ const (
 
 // Globals
 var (
+	// UserAgent for Fs which can set it
+	UserAgent = "rclone/" + Version
 	// Filesystem registry
 	fsRegistry []*RegInfo
 	// ErrorNotFoundInConfigFile is returned by NewFs if not found in config file

fs/version.go

@@ -1,4 +1,4 @@
 package fs
 
 // Version of rclone
-const Version = "v1.29"
+var Version = "v1.29"

rclone.go

@@ -414,6 +414,7 @@ func main() {
 		log.SetOutput(f)
 		redirectStderr(f)
 	}
+	fs.Debug("rclone", "Starting with parameters %+v", os.Args)
 
 	// Setup CPU profiling if desired
 	if *cpuProfile != "" {