t9c, 9l: allow CC9=clang - plan9port - [fork] Plan 9 from user space
 (HTM) git clone git://src.adamsgaard.dk/plan9port
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       ---
 (DIR) commit 0c6074b6920c8e115944c9c5e79b74e9faad84cb
 (DIR) parent c4da64274d01d25fe699f888ce7ad6311bf4ef8b
 (HTM) Author: Nikolai Saoukh <nikolai.saoukh@gmail.com>
       Date:   Mon, 22 Feb 2010 16:53:37 -0800
       
       9c, 9l: allow CC9=clang
       
       R=rsc
       CC=codebot
       http://codereview.appspot.com/217045
       
       Diffstat:
         M CONTRIBUTORS                        |       1 +
         M bin/9c                              |      64 ++++++++++++++++++++++++-------
         M bin/9l                              |      12 ++++++------
       
       3 files changed, 58 insertions(+), 19 deletions(-)
       ---
 (DIR) diff --git a/CONTRIBUTORS b/CONTRIBUTORS
       t@@ -17,6 +17,7 @@ Mathieu Lonjaret <lejatorn@gmail.com>
        Mathieu Lonjaret <mathieu.lonjaret@gmail.com>
        Michael Teichgräber <mt4swm@googlemail.com>
        Michael Teichgräber <mt@ib.wmipf.de>
       +Nikolai Saoukh <nikolai.saoukh@gmail.com>
        Russ Cox <rsc@swtch.com>
        Tim Newsham <tim.newsham@gmail.com>
        Tony Lainson <t.lainson@gmail.com>
 (DIR) diff --git a/bin/9c b/bin/9c
       t@@ -3,7 +3,7 @@
        test -f $PLAN9/config && . $PLAN9/config
        usegcc()
        {
       -        cc=gcc
       +        cc=${CC9:-gcc}
                ngflags=" \
                        -O2 \
                        -c \
       t@@ -21,12 +21,58 @@ usegcc()
                cflags="$ngflags -ggdb"
        }
        
       +quiet()
       +{
       +        # The uniq at the end is for gcc's strcmp/etc. built-in nonsense,
       +        # which multiplies single errors as a result of its expansion.
       +        # The "Cursor. is deprecated" kills off warnings from Apple
       +        # about using SetCursor/InitCursor.  (Okay, they're deprecated,
       +        # but you could at least tell us what to use instead, Apple!)
       +
       +        ignore=': error: .Each undeclared identifier'
       +        ignore=$ignore'|: error: for each function it appears'
       +        ignore=$ignore'|is dangerous, better use'
       +        ignore=$ignore'|is almost always misused'
       +        ignore=$ignore'|: In function '
       +        ignore=$ignore'|: At top level:'
       +        ignore=$ignore'|support .long long.'
       +        ignore=$ignore'|In file included from'
       +        ignore=$ignore'|        from'
       +        ignore=$ignore'|use of C99 long long'
       +        ignore=$ignore'|ISO C forbids conversion'
       +        ignore=$ignore'|is deprecated'
       +        ignore=$ignore'|warn_unused_result'
       +
       +        grep -v '__p9l_autolib_' $1 |
       +        egrep -v "$ignore" |
       +        sed 's/ .first use in this function.$//; s/\"\([^\"][^\"]*\)\", line \([0-9][0-9]*\)/\1:\2/g' |
       +        uniq 1>&2
       +}
       +
       +useclang()
       +{
       +        cc=${CC9:-clang}
       +        ngflags=" \
       +                -O2 \
       +                -c \
       +                -Wall \
       +                -Wno-comment \
       +                -Wno-empty-body \
       +                -Wno-parentheses \
       +                -Wno-unknown-pragmas \
       +                -Wno-unused-value \
       +        "
       +        cflags="$ngflags -g"
       +}
       +
        tag="${SYSNAME:-`uname`}-${OBJTYPE:-`uname -m`}-${CC9:-cc}"
        case "$tag" in
       +*FreeBSD*gcc*)        usegcc ;;
       +*FreeBSD*clang*)        useclang ;;
        *BSD*)        usegcc ;;
        *Darwin*)        usegcc 
                        cflags="$ngflags -g3 -no-cpp-precomp -m32" ;;
       -*HP-UX*)        cc=cc; cflags="-g -O -c -Ae" ;;
       +*HP-UX*)        cc=${CC9:-cc}; cflags="-g -O -c -Ae" ;;
        *Linux*)        usegcc 
                        case "${CC9:-gcc}" in
                        tcc)
       t@@ -43,7 +89,7 @@ case "$tag" in
                                ;;
                        esac
                        ;;
       -*OSF1*)                cc=cc; cflags="-g -O -c" ;;
       +*OSF1*)                cc=${CC9:-cc}; cflags="-g -O -c" ;;
        *SunOS*-cc)        cc=cc;
                        cflags="-mt -g -O -c -xCC -D__sun__" 
                        u=`uname`
       t@@ -67,17 +113,9 @@ case "$tag" in
        esac
        
        # N.B. Must use temp file to avoid pipe; pipe loses status.
       -# The uniq at the end is for gcc's strcmp/etc. built-in nonsense,
       -# which multiplies single errors as a result of its expansion.
       -# The "Cursor. is deprecated" kills off warnings from Apple
       -# about using SetCursor/InitCursor.  (Okay, they're deprecated,
       -# but you could at least tell us what to use instead, Apple!)
        xtmp=/tmp/9c.$$.$USER.out
        $cc -DPLAN9PORT -I$PLAN9/include $cflags "$@" 2>$xtmp
        status=$?
       -grep -v '__p9l_autolib_' $xtmp |
       -egrep -v ': error: .Each undeclared identifier|: error: for each function it appears|is dangerous, better use|is almost always misused|: In function |: At top level:|support .long long.|In file included from|        from|use of C99 long long|ISO C forbids conversion|is deprecated|warn_unused_result' |
       -sed 's/ .first use in this function.$//; s/\"\([^\"][^\"]*\)\", line \([0-9][0-9]*\)/\1:\2/g' |
       -uniq 1>&2
       -rm -f $xtmp $xtmp.status
       +quiet $xtmp
       +rm -f $xtmp
        exit $status
 (DIR) diff --git a/bin/9l b/bin/9l
       t@@ -12,7 +12,7 @@ extralibs="-lm"
        tag="${SYSNAME:-`uname`}-${OBJTYPE:-`uname -m`}"
        case "$tag" in
        *FreeBSD*)
       -        ld=gcc
       +        ld=${CC9:-gcc}
                userpath=true
                extralibs="$extralibs -lutil"
                case "`uname -r`" in
       t@@ -25,18 +25,18 @@ case "$tag" in
                esac
                ;;
        *BSD*)
       -        ld=gcc
       +        ld=${CC9:-gcc}
                userpath=true
                extralibs="$extralibs -lutil"
                ;;
        *OSF1*)
       -        ld=cc
       +        ld=${CC9:-cc}
                userpath=true
                extralibs="$extralibs -lutil"
                nmflags="-B"
                ;;
        *Linux*)
       -        ld=gcc
       +        ld=${CC9:-gcc}
                userpath=true
                extralibs="$extralibs -lutil"
                case "${SYSVERSION:-`uname -r`}" in
       t@@ -46,7 +46,7 @@ case "$tag" in
                esac
                ;;
        *Darwin*)
       -        ld="gcc -m32"
       +        ld="${CC9:-gcc} -m32"
                ;;
        *SunOS*)
                ld="${CC9:-cc} -g"
       t@@ -76,7 +76,7 @@ case "$tag" in
                esac
                ;;
        *AIX*)
       -        ld=gcc
       +        ld=${CC9:-gcc}
                nmflags="-B"
                ;;
        *)