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all: fix or silence various gcc warnings As usual, gcc finds some real problems but also reports a ton of noise. Fix the problems and quiet the noise.
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  1 dbd7b9a9 2003-11-23 devnull #!/bin/sh

  2 dbd7b9a9 2003-11-23 devnull 

  3 eea5f6ad 2005-01-17 devnull test -f $PLAN9/config && . $PLAN9/config

  4 dbd7b9a9 2003-11-23 devnull usegcc()

  5 dbd7b9a9 2003-11-23 devnull {

  6 0c6074b6 2010-02-23 rsc 	cc=${CC9:-gcc}

  7 8f314994 2004-03-02 devnull 	ngflags=" \

  8 dbd7b9a9 2003-11-23 devnull 		-O2 \

  9 dbd7b9a9 2003-11-23 devnull 		-c \

 10 dbd7b9a9 2003-11-23 devnull 		-Wall \

 11 dbd7b9a9 2003-11-23 devnull 		-Wno-parentheses \

 12 dbd7b9a9 2003-11-23 devnull 		-Wno-missing-braces \

 13 dbd7b9a9 2003-11-23 devnull 		-Wno-switch \

 14 d51419bf 2004-02-09 devnull 		-Wno-comment \

 15 3765283c 2003-11-25 devnull 		-Wno-sign-compare \

 16 115d4c0a 2004-05-03 devnull 		-Wno-unknown-pragmas \

 17 fafa622a 2020-01-12 rsc 		-Wno-misleading-indentation \

 18 fafa622a 2020-01-12 rsc 		-Wno-stringop-truncation \

 19 fafa622a 2020-01-12 rsc 		-Wno-stringop-overflow \

 20 fafa622a 2020-01-12 rsc 		-Wno-format-truncation \

 21 be36ff68 2004-04-29 devnull 		-fno-omit-frame-pointer \

 22 34d629c8 2012-10-20 rsc 		-fsigned-char \

 23 dbd7b9a9 2003-11-23 devnull 	"

 24 be36ff68 2004-04-29 devnull 	# want to put -fno-optimize-sibling-calls here but

 25 be36ff68 2004-04-29 devnull 	# that option only works with gcc3+ it seems

 26 dc9d0ffc 2004-03-02 devnull 	cflags="$ngflags -ggdb"

 27 dbd7b9a9 2003-11-23 devnull }

 28 dbd7b9a9 2003-11-23 devnull 

 29 0c6074b6 2010-02-23 rsc quiet()

 30 0c6074b6 2010-02-23 rsc {

 31 0c6074b6 2010-02-23 rsc 	# The uniq at the end is for gcc's strcmp/etc. built-in nonsense,

 32 0c6074b6 2010-02-23 rsc 	# which multiplies single errors as a result of its expansion.

 33 0c6074b6 2010-02-23 rsc 	# The "Cursor. is deprecated" kills off warnings from Apple

 34 0c6074b6 2010-02-23 rsc 	# about using SetCursor/InitCursor.  (Okay, they're deprecated,

 35 0c6074b6 2010-02-23 rsc 	# but you could at least tell us what to use instead, Apple!)

 36 0c6074b6 2010-02-23 rsc 

 37 0c6074b6 2010-02-23 rsc 	ignore=': error: .Each undeclared identifier'

 38 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|: error: for each function it appears'

 39 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|is dangerous, better use'

 40 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|is almost always misused'

 41 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|: In function '

 42 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|: At top level:'

 43 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|support .long long.'

 44 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|In file included from'

 45 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|        from'

 46 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|use of C99 long long'

 47 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|ISO C forbids conversion'

 48 310ae033 2017-01-06 rsc 	ignore=$ignore'|marked deprecated'

 49 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|is deprecated'

 50 0c6074b6 2010-02-23 rsc 	ignore=$ignore'|warn_unused_result'

 51 310ae033 2017-01-06 rsc 	ignore=$ignore'|expanded from macro'

 52 0c6074b6 2010-02-23 rsc 

 53 0c6074b6 2010-02-23 rsc 	grep -v '__p9l_autolib_' $1 |

 54 0c6074b6 2010-02-23 rsc 	egrep -v "$ignore" |

 55 0c6074b6 2010-02-23 rsc 	sed 's/ .first use in this function.$//; s/\"\([^\"][^\"]*\)\", line \([0-9][0-9]*\)/\1:\2/g' |

 56 af0dea45 2011-05-17 rsc 	$(which uniq) 1>&2  # avoid built-in uniq on SunOS

 57 0c6074b6 2010-02-23 rsc }

 58 0c6074b6 2010-02-23 rsc 

 59 0c6074b6 2010-02-23 rsc useclang()

 60 0c6074b6 2010-02-23 rsc {

 61 0c6074b6 2010-02-23 rsc 	cc=${CC9:-clang}

 62 0c6074b6 2010-02-23 rsc 	ngflags=" \

 63 0c6074b6 2010-02-23 rsc 		-O2 \

 64 0c6074b6 2010-02-23 rsc 		-c \

 65 0c6074b6 2010-02-23 rsc 		-Wall \

 66 0c6074b6 2010-02-23 rsc 		-Wno-parentheses \

 67 34d629c8 2012-10-20 rsc 		-Wno-missing-braces \

 68 34d629c8 2012-10-20 rsc 		-Wno-switch \

 69 34d629c8 2012-10-20 rsc 		-Wno-comment \

 70 34d629c8 2012-10-20 rsc 		-Wno-sign-compare \

 71 0c6074b6 2010-02-23 rsc 		-Wno-unknown-pragmas \

 72 34d629c8 2012-10-20 rsc 		-Wno-empty-body \

 73 0c6074b6 2010-02-23 rsc 		-Wno-unused-value \

 74 b0ae8a46 2012-10-21 rsc 		-Wno-array-bounds \

 75 b0ae8a46 2012-10-21 rsc 		-Wno-gnu-designator \

 76 6c7443a6 2014-10-21 0intro 		-Wno-array-bounds \

 77 6c7443a6 2014-10-21 0intro 		-Wno-unneeded-internal-declaration \

 78 34d629c8 2012-10-20 rsc 		-fsigned-char \

 79 b0ae8a46 2012-10-21 rsc 		-fno-caret-diagnostics \

 80 0c6074b6 2010-02-23 rsc 	"

 81 0c6074b6 2010-02-23 rsc 	cflags="$ngflags -g"

 82 0c6074b6 2010-02-23 rsc }

 83 0c6074b6 2010-02-23 rsc 

 84 8f314994 2004-03-02 devnull tag="${SYSNAME:-`uname`}-${OBJTYPE:-`uname -m`}-${CC9:-cc}"

 85 dbd7b9a9 2003-11-23 devnull case "$tag" in

 86 194178b5 2020-01-07 crossd *DragonFly*gcc*|*BSD*gcc*)	usegcc ;;

 87 194178b5 2020-01-07 crossd *DragonFly*clang|*BSD*clang*)	useclang ;;

 88 310ae033 2017-01-06 rsc *Darwin-x86_64*)

 89 b0ae8a46 2012-10-21 rsc 		useclang

 90 b0ae8a46 2012-10-21 rsc 		cflags="$ngflags -g3 -m64"

 91 b0ae8a46 2012-10-21 rsc 		;;

 92 b0ae8a46 2012-10-21 rsc *Darwin*clang*)

 93 b0ae8a46 2012-10-21 rsc 		useclang

 94 b0ae8a46 2012-10-21 rsc 		cflags="$ngflags -g3 -m32"

 95 b0ae8a46 2012-10-21 rsc 		;;

 96 53dbac94 2004-03-02 devnull *Darwin*)	usegcc 

 97 fa662c95 2009-09-11 russcox 		cflags="$ngflags -g3 -no-cpp-precomp -m32" ;;

 98 0c6074b6 2010-02-23 rsc *HP-UX*)	cc=${CC9:-cc}; cflags="-g -O -c -Ae" ;;

 99 282c88f9 2004-09-17 devnull *Linux*)	usegcc 

100 3b8f0b79 2005-07-22 devnull 		case "${CC9:-gcc}" in

101 3b8f0b79 2005-07-22 devnull 		tcc)

102 3b8f0b79 2005-07-22 devnull 			cc=tcc

103 3b8f0b79 2005-07-22 devnull 			cflags="-c -g"

104 3b8f0b79 2005-07-22 devnull 			;;

105 3b8f0b79 2005-07-22 devnull 		esac

106 ead3e311 2005-01-04 devnull 		case "${SYSVERSION:-`uname -r`}" in

107 f7954492 2006-05-05 devnull 		2.4.*)

108 f7954492 2006-05-05 devnull 			cflags="$cflags -D__Linux24__"

109 f7954492 2006-05-05 devnull 			;;

110 fa267621 2004-12-24 devnull 		2.6.*)

111 282c88f9 2004-09-17 devnull 			cflags="$cflags -D__Linux26__"

112 282c88f9 2004-09-17 devnull 			;;

113 282c88f9 2004-09-17 devnull 		esac

114 282c88f9 2004-09-17 devnull 		;;

115 0c6074b6 2010-02-23 rsc *OSF1*)		cc=${CC9:-cc}; cflags="-g -O -c" ;;

116 0f192bb8 2004-03-26 devnull *SunOS*-cc)	cc=cc;

117 9e863cf5 2005-01-07 devnull 		cflags="-mt -g -O -c -xCC -D__sun__" 

118 0f192bb8 2004-03-26 devnull 		u=`uname`

119 1b431b18 2004-03-26 devnull 		v=`uname -r`

120 1b431b18 2004-03-26 devnull 		s=`echo $u$v | tr '. ' '__'`

121 4fc1f5f9 2005-01-19 devnull 		cflags="$cflags -D__${s}__"

122 0f192bb8 2004-03-26 devnull 		;;

123 0f192bb8 2004-03-26 devnull *SunOS*-gcc)	usegcc

124 0f192bb8 2004-03-26 devnull 		u=`uname`

125 1b431b18 2004-03-26 devnull 		v=`uname -r`

126 1b431b18 2004-03-26 devnull 		s=`echo $u$v | tr '. ' '__'`

127 78802e69 2004-04-24 devnull 		cflags="$ngflags -g"

128 5f6612ba 2008-05-31 rsc 		cflags="$cflags -D__sun__ -D__${s}__"

129 0f192bb8 2004-03-26 devnull 		;;

130 e6c837d6 2009-07-15 rsc *AIX*)		usegcc

131 e6c837d6 2009-07-15 rsc 		cflags="$ngflags -g -D__AIX__"

132 e6c837d6 2009-07-15 rsc 		;;

133 dbd7b9a9 2003-11-23 devnull *)

134 dbd7b9a9 2003-11-23 devnull 	echo 9c does not know how to compile on "$tag" 1>&2

135 dbd7b9a9 2003-11-23 devnull 	exit 1

136 dbd7b9a9 2003-11-23 devnull esac

137 dbd7b9a9 2003-11-23 devnull 

138 ead3e311 2005-01-04 devnull # N.B. Must use temp file to avoid pipe; pipe loses status.

139 436ff26c 2019-11-11 crossd xtmp=${TMPDIR-/tmp}/9c.$$.$USER.out

140 593ac8b3 2005-07-22 devnull $cc -DPLAN9PORT -I$PLAN9/include $cflags "$@" 2>$xtmp

141 d756dc5e 2005-01-07 devnull status=$?

142 0c6074b6 2010-02-23 rsc quiet $xtmp

143 0c6074b6 2010-02-23 rsc rm -f $xtmp

144 ead3e311 2005-01-04 devnull exit $status