gcc/fixinc.math

   1 #! /bin/sh
   2 # Fix struct exception in /usr/include/math.h.
   3 #
   4 # We expect several systems which did not need fixincludes in the past
   5 # to need to fix just math.h.  So we created a separate fixinc.mathh
   6 # script to fix just that problem.
   7 # See README-fixinc for more information.
   8
   9 # Directory containing the original header files.
  10 # (This was named INCLUDES, but that conflicts with a name in Makefile.in.)
  11 INPUT=${2-${INPUT-/usr/include}}
  12
  13 # Directory in which to store the results.
  14 LIB=${1?"fixincludes: output directory not specified"}
  15
  16 # Define PWDCMD as a command to use to get the working dir
  17 # in the form that we want.
  18 PWDCMD=pwd
  19 case "`pwd`" in
  20 //*)
  21         # On an Apollo, discard everything before `/usr'.
  22         PWDCMD="eval pwd | sed -e 's,.*/usr/,/usr/,'"
  23         ;;
  24 esac
  25
  26 # Original directory.
  27 ORIGDIR=`${PWDCMD}`
  28
  29 # Make sure it exists.
  30 if [ ! -d $LIB ]; then
  31   mkdir $LIB || exit 1
  32 fi
  33
  34 # Make LIB absolute only if needed to avoid problems with the amd.
  35 case $LIB in
  36 /*)
  37         ;;
  38 *)
  39         cd $LIB; LIB=`${PWDCMD}`
  40         ;;
  41 esac
  42
  43 # Fail if no arg to specify a directory for the output.
  44 if [ x$1 = x ]
  45 then echo fixincludes: no output directory specified
  46 exit 1
  47 fi
  48
  49 echo Building fixed headers in ${LIB}
  50
  51 # Determine whether this system has symbolic links.
  52 if ln -s X $LIB/ShouldNotExist 2>/dev/null; then
  53   rm -f $LIB/ShouldNotExist
  54   LINKS=true
  55 elif ln -s X /tmp/ShouldNotExist 2>/dev/null; then
  56   rm -f /tmp/ShouldNotExist
  57   LINKS=true
  58 else
  59   LINKS=false
  60 fi
  61
  62 cd ${INPUT}
  63
  64 # Some math.h files define struct exception, which conflicts with
  65 # the class exception defined in the C++ file std/stdexcept.h.  We
  66 # redefine it to __math_exception.  This is not a great fix, but I
  67 # haven't been able to think of anything better.
  68 file=math.h
  69 if [ -r $file ] && [ ! -r ${LIB}/$file ]; then
  70   cp $file ${LIB}/$file >/dev/null 2>&1 || echo "Can't copy $file"
  71   chmod +w ${LIB}/$file 2>/dev/null
  72   chmod a+r ${LIB}/$file 2>/dev/null
  73 fi
  74
  75 if [ -r ${LIB}/$file ]; then
  76   echo Fixing $file, exception
  77   sed -e '/struct exception/i\
  78 #ifdef __cplusplus\
  79 #define exception __math_exception\
  80 #endif\
  81 '\
  82       -e '/struct exception/a\
  83 #ifdef __cplusplus\
  84 #undef exception\
  85 #endif\
  86 ' ${LIB}/$file > ${LIB}/${file}.sed
  87   rm -f ${LIB}/$file; mv ${LIB}/${file}.sed ${LIB}/$file
  88   if egrep 'matherr()' ${LIB}/$file >/dev/null 2>&1; then
  89     sed -e '/matherr/i\
  90 #ifdef __cplusplus\
  91 #define exception __math_exception\
  92 #endif\
  93 '\
  94         -e '/matherr/a\
  95 #ifdef __cplusplus\
  96 #undef exception\
  97 #endif\
  98 ' ${LIB}/$file > ${LIB}/${file}.sed
  99     rm -f ${LIB}/$file; mv ${LIB}/${file}.sed ${LIB}/$file
 100   fi
 101   if cmp $file ${LIB}/$file >/dev/null 2>&1; then
 102     rm -f ${LIB}/$file
 103   else
 104     # Find any include directives that use "file".
 105     for include in `egrep '^[       ]*#[    ]*include[      ]*"[^/]' ${LIB}/$file | sed -e 's/^[    ]*#[    ]*include[      ]*"\([^"]*\)".*$/\1/'`; do
 106       dir=`echo $file | sed -e s'|/[^/]*$||'`
 107       required="$required ${INPUT} $dir/$include ${LIB}/$dir/$include"
 108     done
 109   fi
 110 fi
 111 exit 0