commit e683bdfa76a5c2c54422a6bd2934b133d77ba610
from: Dan Cross <cross@gajendra.net>
via: Dan Cross <crossd@gmail.com>
date: Tue Oct 05 12:24:37 2021 UTC

mk: provide a mechanism to default to `rc`

For cross-compiling plan9 from Unix, provide a way
to force `mk` to use `rc` instead of `sh` without
setting `MKSHELL` in individual `mkfile`s.

If the environment variable `FORCERCFORMK` is set,
`mk` will default to using `rc`, not `sh`.

Signed-off-by: Dan Cross <cross@gajendra.net>

commit - d3ee9f70e4ee00bd12557910c9e3dcc1fabd53c7
commit + e683bdfa76a5c2c54422a6bd2934b133d77ba610
blob - 8c15ec218e3217a1b6d39ea6cfe83d2a26af399c
blob + 3e10146f68eec29a0407a03ef9cf526f55cf274f
--- src/cmd/mk/shell.c
+++ src/cmd/mk/shell.c
@@ -41,6 +41,8 @@ setshell(Word *w)
 void
 initshell(void)
 {
+	if(getenv("FORCERCFORMK") != nil)
+		shelldefault = &rcshell;
 	shellcmd = stow(shelldefault->name);
 	shellt = shelldefault;
 	setvar("MKSHELL", shellcmd);