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1 #!/bin/sh
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2 #
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3 # This script parses the output of a gcc bootstrap when using warning
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4 # flags and determines various statistics.
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5 #
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6 # usage: warn_summary [-llf] [-s stage] [-nosub|-ch|-cp|-f|-fortran|-java|-ada|-intl|-fixinc]
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7 # [-pass|-wpass] [file(s)]
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8 #
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9 # -llf
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10 # Filter out long lines from the bootstrap output before any other
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11 # action. This is useful for systems with broken awks/greps which choke
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12 # on long lines. It is not done by default as it sometimes slows things
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13 # down.
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14 #
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15 # -s number
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16 # Take warnings from stage "Number". Stage 0 means show warnings from
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17 # before and after the gcc bootstrap directory. E.g. libraries, etc.
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18 # This presupposes using "gcc -W*" for the stage1 compiler.
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19 #
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20 # -nosub
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21 # Only show warnings from the gcc top level directory.
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22 # -ch|-cp|-f|-fortran|-java|-ada|-intl|-fixinc
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23 # Only show warnings from the specified gcc subdirectory.
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24 # These override each other so only the last one passed takes effect.
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25 #
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26 # -pass
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27 # Pass through the bootstrap output after filtering stage and subdir
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28 # (useful for manual inspection.) This is all lines, not just warnings.
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29 # -wpass
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30 # Pass through only warnings from the bootstrap output after filtering
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31 # stage and subdir.
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32 #
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33 # By Kaveh Ghazi (ghazi@caip.rutgers.edu) 12/13/97.
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34
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35
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36 # Some awks choke on long lines, sed seems to do a better job.
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37 # Truncate lines > 255 characters. RE '.\{255,\}' doesn't seem to work. :-(
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38 # Only do this if -llf was specified, because it can really slow things down.
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39 longLineFilter()
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40 {
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41 if test -z "$llf" ; then
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42 cat
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43 else
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44 sed 's/^\(...............................................................................................................................................................................................................................................................\).*/\1/'
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45 fi
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46 }
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47
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48 # This function does one of three things. It either passes through
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49 # all warning data, or passes through gcc toplevel warnings, or passes
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50 # through a particular subdirectory set of warnings.
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51 subdirectoryFilter()
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52 {
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53 longLineFilter | (
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54 if test -z "$filter" ; then
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55 # Pass through all lines.
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56 cat
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57 else
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58 if test "$filter" = nosub ; then
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59 # Omit all subdirectories.
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60 egrep -v '/gcc/(ch|cp|f|fortran|java|ada|intl|fixinc)/'
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61 else
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62 # Pass through only subdir $filter.
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63 grep "/gcc/$filter/"
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64 fi
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65 fi )
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66 }
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67
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68 # This function displays all lines from stageN of the bootstrap. If
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69 # stage==0, then show lines prior to stage1 and lines from after the last
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70 # stage. I.e. utilities, libraries, etc.
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71 stageNfilter()
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72 {
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73 if test "$stageN" -lt 1 ; then
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74 # stage "0" means check everything *but* gcc.
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75 $AWK "BEGIN{t=1} ; /^Bootstrapping the compiler/{t=0} ; /^Building runtime libraries/{t=1} ; {if(t==1)print}"
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76 else
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77 if test "$stageN" -eq 1 ; then
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78 $AWK "/^Bootstrapping the compiler|^Building the C and C\+\+ compiler/{t=1} ; /stage$stageN/{t=0} ; {if(t==1)print}"
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79 else
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80 stageNminus1=`expr $stageN - 1`
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81 $AWK "/stage${stageNminus1}\//{t=1} ; /stage$stageN/{t=0} ; {if(t==1)print}"
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82 fi
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83 fi
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84 }
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85
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86 # This function displays lines containing warnings.
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87 warningFilter()
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88 {
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89 grep ' warning: '
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90 }
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91
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92 # This function replaces `xxx' with `???', where xxx is usually some
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93 # variable or function name. This allows similar warnings to be
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94 # counted together when summarizing. However it avoids replacing
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95 # certain C keywords which are known appear in various messages.
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96
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97 keywordFilter() {
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98 sed 's/.*warning: //;
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99 s/`\(int\)'"'"'/"\1"/g;
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100 s/`\(long\)'"'"'/"\1"/g;
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101 s/`\(char\)'"'"'/"\1"/g;
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102 s/`\(inline\)'"'"'/"\1"/g;
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103 s/`\(else\)'"'"'/"\1"/g;
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104 s/`\(return\)'"'"'/"\1"/g;
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105 s/`\(static\)'"'"'/"\1"/g;
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106 s/`\(extern\)'"'"'/"\1"/g;
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107 s/`\(const\)'"'"'/"\1"/g;
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108 s/`\(noreturn\)'"'"'/"\1"/g;
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109 s/`\(longjmp\)'"'"' or `\(vfork\)'"'"'/"\1" or "\2"/g;
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110 s/'"[\`'][^']*'/"'"???"/g;
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111 s/.*format, .* arg (arg [0-9][0-9]*)/??? format, ??? arg (arg ???)/;
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112 s/\([( ]\)arg [0-9][0-9]*\([) ]\)/\1arg ???\2/;
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113 s/"\([^"]*\)"/`\1'"'"'/g'
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114 }
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115
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116 # This function strips out relative pathnames for source files printed
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117 # by the warningFilter function. This is done so that as the snapshot
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118 # directory name changes every week, the output of this program can be
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119 # compared to previous runs without spurious diffs caused by source
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120 # directory name changes.
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121
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122 srcdirFilter()
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123 {
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124 sed '
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125 s%^[^ ]*/\(gcc/\)%\1%;
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126 s%^[^ ]*/\(include/\)%\1%;
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127 s%^[^ ]*/\(texinfo/\)%\1%;
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128 s%^[^ ]*/\(fastjar/\)%\1%;
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129 s%^[^ ]*/\(zlib/\)%\1%;
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130 s%^[^ ]*/\(fixincludes/\)%\1%;
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131 s%^[^ ]*/\(sim/\)%\1%;
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132 s%^[^ ]*/\(newlib/\)%\1%;
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133 s%^[^ ]*/\(mpfr/\)%\1%;
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134 s%^[^ ]*/\(lib[a-z23+-]*/\)%\1%;'
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135 }
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136
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137 # Start the main section.
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138
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139 usage="usage: `basename $0` [-llf] [-s stage] [-nosub|-ch|-cp|-f|-fortran|-java|-ada|-intl|-fixinc] [-pass|-wpass] [file(s)]"
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140 stageN=3
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141 tmpfile=/tmp/tmp-warn.$$
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142
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143 # Remove $tmpfile on exit and various signals.
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144 trap "rm -f $tmpfile" 0
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145 trap "rm -f $tmpfile ; exit 1" 1 2 3 5 9 13 15
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146
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147 # Find a good awk.
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148 if test -z "$AWK" ; then
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149 for AWK in gawk nawk awk ; do
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150 if type $AWK 2>&1 | grep 'not found' > /dev/null 2>&1 ; then
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151 :
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152 else
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153 break
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154 fi
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155 done
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156 fi
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157
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158 # Parse command line arguments.
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159 while test -n "$1" ; do
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160 case "$1" in
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161 -llf) llf=1 ; shift ;;
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162 -s) if test -z "$2"; then echo $usage 1>&2; exit 1; fi
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163 stageN="$2"; shift 2 ;;
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164 -s*) stageN="`expr $1 : '-s\(.*\)'`" ; shift ;;
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165 -nosub|-ch|-cp|-f|-fortran|-java|-ada|-intl|-fixinc) filter="`expr $1 : '-\(.*\)'`" ; shift ;;
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166 -pass) pass=1 ; shift ;;
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167 -wpass) pass=w ; shift ;;
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168 -*) echo $usage 1>&2 ; exit 1 ;;
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169 *) break ;;
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170 esac
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171 done
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172
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173 # Check for a valid value of $stageN.
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174 case "$stageN" in
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175 [0-9]) ;;
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176 *) echo "Stage <$stageN> must be in the range [0..9]." 1>&2 ; exit 1 ;;
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177 esac
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178
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179 for file in "$@" ; do
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180
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181 stageNfilter < $file | subdirectoryFilter > $tmpfile
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182
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183 # (Just) show me the warnings.
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184 if test "$pass" != '' ; then
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185 if test "$pass" = w ; then
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186 warningFilter < $tmpfile
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187 else
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188 cat $tmpfile
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189 fi
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190 continue
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191 fi
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192
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193 if test -z "$filter" ; then
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194 echo "Counting all warnings,"
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195 else
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196 if test "$filter" = nosub ; then
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197 echo "Counting non-subdirectory warnings,"
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198 else
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199 echo "Counting warnings in the gcc/$filter subdirectory,"
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200 fi
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201 fi
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202 count=`warningFilter < $tmpfile | wc -l`
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203 echo there are $count warnings in stage$stageN of this bootstrap.
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204
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205 echo
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206 echo Number of warnings per file:
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207 warningFilter < $tmpfile | srcdirFilter | $AWK -F: '{print$1}' | sort | \
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208 uniq -c | sort -nr
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209
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210 echo
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211 echo Number of warning types:
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212 warningFilter < $tmpfile | keywordFilter | sort | uniq -c | sort -nr
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213
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214 done
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