munch

早期freebsd实现

#!/bin/sh

# create an initialization procedure from a list of .o files

echo '/* Do not modify this file.  It is created automatically by "munch". */'
echo 'void initialize_all_files () {'

NMOPT=""
case $1 in
MUNCH_NM=*)
	MUNCH_NM=`echo $1 | sed 's/MUNCH_NM=//'`; shift ;;
-*)
	NMOPT=$1; shift ;;
esac

# make it easy to use a different nm, e.g. for cross-developing

MUNCH_NM="${MUNCH_NM-nm} $NMOPT"
if test "`$MUNCH_NM main.o | egrep main | egrep FUNC | egrep GLOB`" != "" ; then
    # System V Release 4 style nm
    $MUNCH_NM $* | egrep '|__?initialize_' | egrep FUNC | \
      sed -e \
        's/^.*\(_initialize_[a-zA-Z0-9_]*\).*$/  {extern void \1 (); \1 ();}/'\
      | sort -u
elif test "`$MUNCH_NM main.o | egrep '[TD] *_?main$'`" = "" ; then
     if test "`$MUNCH_NM main.o | head -6 | egrep 'Subspace$'`" != "" ; then
	# HP PA RISC compilers don't prepend underscores
	shift;
	$MUNCH_NM $* | egrep '_initialize_.*' | \
	  sed -e \
	    's/^.*\(_initialize_[a-zA-Z0-9_]*\).*/   {extern void \1 (); \1 ();}/' \
	    | sort -u
     else
	# System V style nm
	shift;
	$MUNCH_NM $* | egrep '_initialize_.*' | egrep '\.text'|\
	  sed -e \
	    's/^.*\(_initialize_[a-zA-Z0-9_]*\).*/  {extern void \1 (); \1 ();}/' \
	    | sort -u
     fi
else
    # BSD style nm
    # We now accept either text or data symbols, since the RT/PC uses data.
    $MUNCH_NM -p $* | egrep '[TD] *_?[_.]initialize_' | \
	sed -e 's/^.*\(initialize_.*\)/  {extern void _\1 (); _\1 ();}/' \
	| sort -u
fi

echo '}'