#! /bin/sh
# Install modified versions of certain problematic Irix include files.
# If possible, create a wrapper (see fixinc.wrap) instead of copying files.
#
# Copyright (C) 1997 Free Software Foundation, Inc.
# Contributed by Brendan Kehoe (brendan@cygnus.com).
#
# This file is part of GNU CC.
# 
# GNU CC is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
# 
# GNU CC is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with GNU CC; see the file COPYING.  If not, write to
# the Free Software Foundation, 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
#	See README-fixinc for more information.

# Directory containing the original header files.
INPUT=${2-${INPUT-/usr/include}}

# Fail if no arg to specify a directory for the output.
if [ x$1 = x ]
then echo fixincludes: no output directory specified
exit 1
fi

# Directory in which to store the results.
LIB=${1?"fixincludes: output directory not specified"}

# Make sure it exists.
if [ ! -d $LIB ]; then
  mkdir $LIB || exit 1
fi

ORIG_DIR=`pwd`

# Make LIB absolute if it is relative.
# Don't do this if not necessary, since may screw up automounters.
case $LIB in
/*)
	;;
*)
 	LIB=$ORIG_DIR/$LIB
	;;
esac

echo 'Building fixincludes in ' ${LIB}

#
# Note: For Irix, we deliberately don't try to create the directory trees,
#       since we only modify math.h, limits.h and unistd.h.  If we
#	ADD ANY OTHERS, the "Making directories:" and symlinks code from
#	fixinc.svr4 may have to go back in.

# This math.h fix is copied from fixinc.wrap.  We want to avoid copying
# math.h because both math.h and stdlib.h have a declaration for initstate,
# and this declaration changed between Irix 6.2 and Irix 6.3.  If we copy this
# file, then the same toolchain can't be shared between 6.2 and 6.3+.

# Some math.h files define struct exception, which conflicts with
# the class exception defined in the C++ file std/stdexcept.h.  We
# redefine it to __math_exception.  This is not a great fix, but I
# haven't been able to think of anything better.
file=math.h
if [ -r $INPUT/$file ]; then
  echo Checking $INPUT/$file
  if grep 'struct exception' $INPUT/$file >/dev/null
  then
    echo Fixed $file
    rm -f $LIB/$file
    cat <<'__EOF__' >$LIB/$file
#ifndef _MATH_H_WRAPPER
#ifdef __cplusplus
# define exception __math_exception
#endif
#include_next <math.h>
#ifdef __cplusplus
# undef exception
#endif
#define _MATH_H_WRAPPER
#endif /* _MATH_H_WRAPPER */
__EOF__
    # Define _MATH_H_WRAPPER at the end of the wrapper, not the start,
    # so that if #include_next gets another instance of the wrapper,
    # this will follow the #include_next chain until we arrive at
    # the real <math.h>.
    chmod a+r $LIB/$file
  fi
fi

# Avoid the definition of the bool type in curses.h when using
# g++, since it's now an official type in the C++ language.

# This is also from fixinc.wrap.

file=curses.h
if [ -r $INPUT/$file ]; then
  echo Checking $INPUT/$file
  w='[	 ]'
  if grep "typedef$w$w*char$w$w*bool$w*;" $INPUT/$file >/dev/null
  then
    echo Fixed $file
    rm -f $LIB/$file
    cat <<'__EOF__' >$LIB/$file
#ifndef _CURSES_H_WRAPPER
#ifdef __cplusplus
# define bool __curses_bool_t
#endif
#include_next <curses.h>
#ifdef __cplusplus
# undef bool
#endif
#define _CURSES_H_WRAPPER
#endif /* _CURSES_H_WRAPPER */
__EOF__
    # Define _CURSES_H_WRAPPER at the end of the wrapper, not the start,
    # so that if #include_next gets another instance of the wrapper,
    # this will follow the #include_next chain until we arrive at
    # the real <curses.h>.
    chmod a+r $LIB/$file
  fi
fi

# In limits.h, put #ifndefs around things that are supposed to be defined
# in float.h to avoid redefinition errors if float.h is included first.

file=limits.h
base=`basename $file`
if [ -r ${LIB}/$file ]; then
  file_to_fix=${LIB}/$file
else
  if [ -r ${INPUT}/$file ]; then
    file_to_fix=${INPUT}/$file
  else
    file_to_fix=""
  fi
fi
if [ \! -z "$file_to_fix" ]; then
  echo Checking $file_to_fix
  sed -e '/[ 	]FLT_MIN[ 	]/i\
#ifndef FLT_MIN
'\
      -e '/[ 	]FLT_MIN[ 	]/a\
#endif
'\
      -e '/[ 	]FLT_MAX[ 	]/i\
#ifndef FLT_MAX
'\
      -e '/[ 	]FLT_MAX[ 	]/a\
#endif
'\
      -e '/[ 	]FLT_DIG[ 	]/i\
#ifndef FLT_DIG
'\
      -e '/[ 	]FLT_DIG[ 	]/a\
#endif
'\
      -e '/[ 	]DBL_MIN[ 	]/i\
#ifndef DBL_MIN
'\
      -e '/[ 	]DBL_MIN[ 	]/a\
#endif
'\
      -e '/[ 	]DBL_MAX[ 	]/i\
#ifndef DBL_MAX
'\
      -e '/[ 	]DBL_MAX[ 	]/a\
#endif
'\
      -e '/[ 	]DBL_DIG[ 	]/i\
#ifndef DBL_DIG
'\
      -e '/[ 	]DBL_DIG[ 	]/a\
#endif
' $file_to_fix > /tmp/$base
  if cmp $file_to_fix /tmp/$base >/dev/null 2>&1; then \
    true
  else
    echo Fixed $file_to_fix
    rm -f ${LIB}/$file
    cp /tmp/$base ${LIB}/$file
    chmod a+r ${LIB}/$file
  fi
  rm -f /tmp/$base
fi

# The Irix unistd.h will introduce a call to __vfork in its libc, but the
# function is never actually prototyped.
file=unistd.h
base=`basename $file`
if [ -r ${LIB}/$file ]; then
  file_to_fix=${LIB}/$file
else
  if [ -r ${INPUT}/$file ]; then
    file_to_fix=${INPUT}/$file
  else
    file_to_fix=""
  fi
fi
if [ \! -z "$file_to_fix" ]; then
  echo Checking $file_to_fix
  sed -e '/__vfork/i\
extern pid_t __vfork(void);'\
     $file_to_fix > /tmp/$base
  if cmp $file_to_fix /tmp/$base >/dev/null 2>&1; then \
    true
  else
    echo Fixed $file_to_fix
    rm -f ${LIB}/$file
    cp /tmp/$base ${LIB}/$file
    chmod a+r ${LIB}/$file
  fi
  rm -f /tmp/$base
fi

exit 0
