t9c: Fix case patterns for DragonFly and other BSDs - plan9port - [fork] Plan 9 from user space
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       ---
 (DIR) commit 194178b5788a09379e01e8ff8bff391b8a8d5c18
 (DIR) parent e6ed10f25e4b2ea791d8e52253f7d806316420e9
 (HTM) Author: Martin Kühl <martin.kuehl@posteo.net>
       Date:   Tue,  7 Jan 2020 23:27:39 +0100
       
       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)
       
       Diffstat:
         M bin/9c                              |       4 ++--
       
       1 file changed, 2 insertions(+), 2 deletions(-)
       ---
 (DIR) diff --git a/bin/9c b/bin/9c
       t@@ -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"