diff options
Diffstat (limited to 'src/cmd/cgo/doc.go')
| -rw-r--r-- | src/cmd/cgo/doc.go | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/src/cmd/cgo/doc.go b/src/cmd/cgo/doc.go index f6a14ae08..1bb48f44e 100644 --- a/src/cmd/cgo/doc.go +++ b/src/cmd/cgo/doc.go @@ -44,6 +44,11 @@ For example: // #include <png.h> import "C" +The CGO_CFLAGS and CGO_LDFLAGS environment variables are added +to the flags derived from these directives. Package-specific flags should +be set using the directives, not the environment variables, so that builds +work in unmodified environments. + Within the Go file, C identifiers or field names that are keywords in Go can be accessed by prefixing them with an underscore: if x points at a C struct with a field named "type", x._type accesses the field. @@ -111,13 +116,13 @@ Not all Go types can be mapped to C types in a useful way. Cgo transforms the input file into four output files: two Go source files, a C file for 6c (or 8c or 5c), and a C file for gcc. -The standard package makefile rules in Make.pkg automate the -process of using cgo. See $GOROOT/misc/cgo/stdio and -$GOROOT/misc/cgo/gmp for examples. +The standard package construction rules of the go command +automate the process of using cgo. See $GOROOT/misc/cgo/stdio +and $GOROOT/misc/cgo/gmp for examples. Cgo does not yet work with gccgo. See "C? Go? Cgo!" for an introduction to using cgo: -http://blog.golang.org/2011/03/c-go-cgo.html +http://golang.org/doc/articles/c_go_cgo.html */ package documentation |