commit 194178b5788a09379e01e8ff8bff391b8a8d5c18
from: Martin Kühl <martin.kuehl@posteo.net>
via: Dan Cross <crossd@gmail.com>
date: Tue Jan 07 23:13:02 2020 UTC

9c: Fix case patterns for DragonFly and other BSDs

POSIX does not support grouping in case item patterns.
Installing with a strict POSIX shell fails with:

/usr/local/plan9/bin/9c: line 82: syntax error near unexpected token `('
/usr/local/plan9/bin/9c: line 82: `*(DragonFly|BSD)*gcc*)	usegcc ;;'

This change expands the patterns to work around the limitation.

See https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_10
(and search for case_clause)

commit - e6ed10f25e4b2ea791d8e52253f7d806316420e9
commit + 194178b5788a09379e01e8ff8bff391b8a8d5c18
blob - 7e6e3ab812de115c5e3abeda32a5331218542327
blob + f21ea754496b9f12dd1264d682c75a7d78c31d9d
--- bin/9c
+++ bin/9c
@@ -79,8 +79,8 @@ useclang()
 
 tag="${SYSNAME:-`uname`}-${OBJTYPE:-`uname -m`}-${CC9:-cc}"
 case "$tag" in
-*(DragonFly|BSD)*gcc*)	usegcc ;;
-*(DragonFly|BSD)*clang*)	useclang ;;
+*DragonFly*gcc*|*BSD*gcc*)	usegcc ;;
+*DragonFly*clang|*BSD*clang*)	useclang ;;
 *Darwin-x86_64*)
 		useclang
 		cflags="$ngflags -g3 -m64"