diff options
Diffstat (limited to 'src/cmd')
| -rw-r--r-- | src/cmd/go/alldocs.go | 6 | ||||
| -rw-r--r-- | src/cmd/go/internal/help/helpdoc.go | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/src/cmd/go/alldocs.go b/src/cmd/go/alldocs.go index 46bca7480b..1029d1e8c2 100644 --- a/src/cmd/go/alldocs.go +++ b/src/cmd/go/alldocs.go @@ -2190,6 +2190,12 @@ // building the package for Windows; similarly, math_386.s will be included // only when building the package for 32-bit x86. // +// By convention, packages with assembly implementations may provide a go-only +// version under the "purego" build constraint. This does not limit the use of +// cgo (use the "cgo" build constraint) or unsafe. For example: +// +// //go:build purego +// // Go versions 1.16 and earlier used a different syntax for build constraints, // with a "// +build" prefix. The gofmt command will add an equivalent //go:build // constraint when encountering the older syntax. diff --git a/src/cmd/go/internal/help/helpdoc.go b/src/cmd/go/internal/help/helpdoc.go index ab04ce001c..1d3ffefc97 100644 --- a/src/cmd/go/internal/help/helpdoc.go +++ b/src/cmd/go/internal/help/helpdoc.go @@ -1009,6 +1009,12 @@ Naming a file dns_windows.go will cause it to be included only when building the package for Windows; similarly, math_386.s will be included only when building the package for 32-bit x86. +By convention, packages with assembly implementations may provide a go-only +version under the "purego" build constraint. This does not limit the use of +cgo (use the "cgo" build constraint) or unsafe. For example: + + //go:build purego + Go versions 1.16 and earlier used a different syntax for build constraints, with a "// +build" prefix. The gofmt command will add an equivalent //go:build constraint when encountering the older syntax. |