the buildmode flag used.

the compiler toolchain flag used.

the effective CGO_CFLAGS environment variable.

the effective CGO_CPPFLAGS environment variable.

the effective CGO_CXXFLAGS environment variable.

the effective CGO_ENABLED environment variable.

the effective CGO_LDFLAGS environment variable.

Known Settings key names.

the architecture feature level for GOARCH.

the architecture target.

Known Settings key names.

Known Settings key names.

Known Settings key names.

Known Settings key names.

the operating system target.

Known Settings key names.

Known Settings key names.

Known Settings key names.

Known Settings key names.

Known Settings key names.

Known Settings key names.

true or false indicating whether the source tree had local modifications.

the revision identifier for the current commit or checkout.

the modification time associated with vcs.revision, in RFC3339 format.

the version control system for the source tree where the build ran.