doc/link.md: update `mruby-config` description.
MODIFY
doc/guides/compile.md
doc/guides/compile.md
@@ -527,7 +527,9 @@ convenience. `mruby-config` command prints the configuration used for `libmruby.
$ mruby-config --help
Usage: mruby-config [switches]
switches:
+ --cc print compiler name
--cflags print flags passed to compiler
+ --ld print linker name
--ldflags print flags passed to linker
--ldflags-before-libs print flags passed to linker before linked libraries
--libs print linked libraries

MODIFY
doc/guides/link.md
doc/guides/link.md
@@ -49,7 +49,10 @@ for example:
* `-D` to specify mruby configuration macros
To retrieve compiler options used to build `mruby`, you can use `mruby-config`
-command.
+command with following options:
+
+* `--cc` compiler name
+* `--cflags` options passed to compiler
```
$ mruby-config --cflags
@@ -63,6 +66,7 @@ compatible to mruby configuration.
To retrieve linker options, you can use `mruby-config` with following options:
+* `--ld` linker name
* `--ldflags` options passed to linker
* `--ldflags-before-libs` options passed to linker before linked libraries
* `--libs` linked libraries

doc/link.md: update `mruby-config` description.