NetBSD/gnu/dist/gcc/fixinc.math

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#! /bin/sh
# Fix struct exception in /usr/include/math.h.
#
# We expect several systems which did not need fixincludes in the past
# to need to fix just math.h. So we created a separate fixinc.mathh
# script to fix just that problem.
# See README-fixinc for more information.
# Directory containing the original header files.
# (This was named INCLUDES, but that conflicts with a name in Makefile.in.)
INPUT=${2-${INPUT-/usr/include}}
# Directory in which to store the results.
LIB=${1?"fixincludes: output directory not specified"}
# Define PWDCMD as a command to use to get the working dir
# in the form that we want.
PWDCMD=pwd
case "`pwd`" in
//*)
# On an Apollo, discard everything before `/usr'.
PWDCMD="eval pwd | sed -e 's,.*/usr/,/usr/,'"
;;
esac
# Original directory.
ORIGDIR=`${PWDCMD}`
# Make sure it exists.
if [ ! -d $LIB ]; then
mkdir $LIB || exit 1
fi
# Make LIB absolute only if needed to avoid problems with the amd.
case $LIB in
/*)
;;
*)
cd $LIB; LIB=`${PWDCMD}`
;;
esac
# 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
echo Building fixed headers in ${LIB}
# Determine whether this system has symbolic links.
if ln -s X $LIB/ShouldNotExist 2>/dev/null; then
rm -f $LIB/ShouldNotExist
LINKS=true
elif ln -s X /tmp/ShouldNotExist 2>/dev/null; then
rm -f /tmp/ShouldNotExist
LINKS=true
else
LINKS=false
fi
cd ${INPUT}
# 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 $file ] && [ ! -r ${LIB}/$file ]; then
cp $file ${LIB}/$file >/dev/null 2>&1 || echo "Can't copy $file"
chmod +w ${LIB}/$file 2>/dev/null
chmod a+r ${LIB}/$file 2>/dev/null
fi
if [ -r ${LIB}/$file ]; then
echo Fixing $file, exception
sed -e '/struct exception/i\
#ifdef __cplusplus\
#define exception __math_exception\
#endif\
'\
-e '/struct exception/a\
#ifdef __cplusplus\
#undef exception\
#endif\
' ${LIB}/$file > ${LIB}/${file}.sed
rm -f ${LIB}/$file; mv ${LIB}/${file}.sed ${LIB}/$file
if egrep 'matherr()' ${LIB}/$file >/dev/null 2>&1; then
sed -e '/matherr/i\
#ifdef __cplusplus\
#define exception __math_exception\
#endif\
'\
-e '/matherr/a\
#ifdef __cplusplus\
#undef exception\
#endif\
' ${LIB}/$file > ${LIB}/${file}.sed
rm -f ${LIB}/$file; mv ${LIB}/${file}.sed ${LIB}/$file
fi
if cmp $file ${LIB}/$file >/dev/null 2>&1; then
rm -f ${LIB}/$file
else
# Find any include directives that use "file".
for include in `egrep '^[ ]*#[ ]*include[ ]*"[^/]' ${LIB}/$file | sed -e 's/^[ ]*#[ ]*include[ ]*"\([^"]*\)".*$/\1/'`; do
dir=`echo $file | sed -e s'|/[^/]*$||'`
required="$required ${INPUT} $dir/$include ${LIB}/$dir/$include"
done
fi
fi
exit 0