build: Temporary fix for Windows build errors

Applies a temporary fix similar to grafana/grafana#28557
before go 1.15.6+ fixes golang/go#40795

Author: ivandeex

.github/workflows/build.yml

@@ -46,6 +46,7 @@ jobs:
             go: '1.15.x'
             gotags: cmount
             build_flags: '-include "^windows/amd64" -cgo'
+            build_args: '-buildmode exe'
             quicktest: true
             racequicktest: true
             deploy: true
@@ -57,6 +58,7 @@ jobs:
             goarch: '386'
             cgo: '1'
             build_flags: '-include "^windows/386" -cgo'
+            build_args: '-buildmode exe'
             quicktest: true
             deploy: true
 
@@ -109,6 +111,7 @@ jobs:
         run: |
           echo 'GOTAGS=${{ matrix.gotags }}' >> $GITHUB_ENV
           echo 'BUILD_FLAGS=${{ matrix.build_flags }}' >> $GITHUB_ENV
+          echo 'BUILD_ARGS=${{ matrix.build_args }}' >> $GITHUB_ENV
           if [[ "${{ matrix.goarch }}" != "" ]]; then echo 'GOARCH=${{ matrix.goarch }}' >> $GITHUB_ENV ; fi
           if [[ "${{ matrix.cgo }}" != "" ]]; then echo 'CGO_ENABLED=${{ matrix.cgo }}' >> $GITHUB_ENV ; fi
 

Makefile

@@ -46,7 +46,7 @@ endif
 .PHONY: rclone test_all vars version
 
 rclone:
-	go build -v --ldflags "-s -X github.com/rclone/rclone/fs.Version=$(TAG)" $(BUILDTAGS)
+	go build -v --ldflags "-s -X github.com/rclone/rclone/fs.Version=$(TAG)" $(BUILDTAGS) $(BUILD_ARGS)
 	mkdir -p `go env GOPATH`/bin/
 	cp -av rclone`go env GOEXE` `go env GOPATH`/bin/rclone`go env GOEXE`.new
 	mv -v `go env GOPATH`/bin/rclone`go env GOEXE`.new `go env GOPATH`/bin/rclone`go env GOEXE`