configur

GNU 系统开发的基于Iz77语法的压缩 学习lz77压缩算法

echo checking for fcntl.h
cat > conftest.c <<EOF
#include <fcntl.h>
EOF
err=`eval "($CPP $DEFS conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then
  :
else
  DEFS="$DEFS -DNO_FCNTL_H=1"
fi
rm -f conftest*

for hdr in unistd.h
do
trhdr=HAVE_`echo $hdr | tr '[a-z]./' '[A-Z]__'`
echo checking for ${hdr}
cat > conftest.c <<EOF
#include <${hdr}>
EOF
err=`eval "($CPP $DEFS conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then
  DEFS="$DEFS -D${trhdr}=1"
fi
rm -f conftest*
done

utime=0
echo checking for utime.h
cat > conftest.c <<EOF
#include <utime.h>
EOF
err=`eval "($CPP $DEFS conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then
  utime=1 
else
  DEFS="$DEFS -DNO_UTIME_H=1"
fi
rm -f conftest*

if test $utime -eq 0; then
  for hdr in sys/utime.h
do
trhdr=HAVE_`echo $hdr | tr '[a-z]./' '[A-Z]__'`
echo checking for ${hdr}
cat > conftest.c <<EOF
#include <${hdr}>
EOF
err=`eval "($CPP $DEFS conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then
  DEFS="$DEFS -D${trhdr}=1"
fi
rm -f conftest*
done

fi
echo checking for directory library header
echo checking for dirent.h
cat > conftest.c <<EOF
#include <sys/types.h>
#include <dirent.h>
int main() { return 0; } 
int t() { DIR *x=0; return x-x; }
EOF
if eval $compile; then
  DEFS="$DEFS -DDIRENT=1" dirheader=dirent.h
fi
rm -f conftest*

if test -z "$dirheader"; then
echo checking for sys/ndir.h
cat > conftest.c <<EOF
#include <sys/ndir.h>
EOF
err=`eval "($CPP $DEFS conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then
  DEFS="$DEFS -DSYSNDIR=1" dirheader=sys/ndir.h
fi
rm -f conftest*

fi
if test -z "$dirheader"; then
echo checking for sys/dir.h
cat > conftest.c <<EOF
#include <sys/dir.h>
EOF
err=`eval "($CPP $DEFS conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then
  DEFS="$DEFS -DSYSDIR=1" dirheader=sys/dir.h
fi
rm -f conftest*

fi
if test -z "$dirheader"; then
echo checking for ndir.h
cat > conftest.c <<EOF
#include <ndir.h>
EOF
err=`eval "($CPP $DEFS conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then
  DEFS="$DEFS -DNDIR=1" dirheader=ndir.h
fi
rm -f conftest*

fi

echo checking for closedir return value
cat > conftest.c <<EOF
#include <sys/types.h>
#include <$dirheader>
int closedir(); main() { exit(0); }
EOF
eval $compile
if test -s conftest && (./conftest; exit) 2>/dev/null; then
  :
else
  DEFS="$DEFS -DVOID_CLOSEDIR=1"
fi
rm -f conftest*

echo checking for Xenix
cat > conftest.c <<EOF
#if defined(M_XENIX) && !defined(M_UNIX)
  yes
#endif

EOF
eval "$CPP $DEFS conftest.c > conftest.out 2>&1"
if egrep "yes" conftest.out >/dev/null 2>&1; then
  XENIX=1
fi
rm -f conftest*

if test -n "$XENIX"; then
  DEFS="$DEFS -DVOID_CLOSEDIR=1"
  LIBS="$LIBS -lx"
  case "$DEFS" in
  *SYSNDIR*) ;;
  *) LIBS="-ldir $LIBS" ;; # Make sure -ldir precedes any -lx.
  esac
fi

# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
# for constant arguments.  Useless!
echo checking for working alloca.h
cat > conftest.c <<EOF
#include <alloca.h>
int main() { return 0; } 
int t() { char *p = alloca(2 * sizeof(int)); }
EOF
if eval $compile; then
  DEFS="$DEFS -DHAVE_ALLOCA_H=1"
fi
rm -f conftest*

decl="#ifdef __GNUC__
#define alloca __builtin_alloca
#else
#if HAVE_ALLOCA_H
#include <alloca.h>
#else
#ifdef _AIX
 #pragma alloca
#else
char *alloca ();
#endif
#endif
#endif
"
echo checking for alloca
cat > conftest.c <<EOF
$decl
int main() { return 0; } 
int t() { char *p = (char *) alloca(1); }
EOF
if eval $compile; then
  :
else
  alloca_missing=1
fi
rm -f conftest*

if test -n "$alloca_missing"; then
  # The SVR3 libPW and SVR4 libucb both contain incompatible functions
  # that cause trouble.  Some versions do not even contain alloca or
  # contain a buggy version.  If you still want to use their alloca,
  # use ar to extract alloca.o from them instead of compiling alloca.c.
  ALLOCA=alloca.o
fi

echo checking for return type of signal handlers
cat > conftest.c <<EOF
#include <sys/types.h>
#include <signal.h>
#ifdef signal
#undef signal
#endif
extern int (*signal ()) ();
int main() { return 0; } 
int t() { int i; }
EOF
if eval $compile; then
  DEFS="$DEFS -DRETSIGTYPE=int"
fi
rm -f conftest*


echo "checking for #! kernel hack"
cat <<'__EOF__' > conftest.csh
#!/bin/csh -f
setenv SHELL /bin/csh
# Avoid tcsh bug 'Bad Hertz Value':
setenv HZ 60
# Make sure foo doesn't get exported into the environment
# Astoundingly, some versions of csh don't have unsetenv.
if (${?foo}) unsetenv foo >& /dev/null
if (${?foo}) unset foo
set output="`./conftest.sh`"
if ( "$output" == "foo=bar" ) then
   exit 0
endif
exit 1
__EOF__
cat <<'__EOF__' > conftest.sh
#!/bin/sh
# If this is really run with sh, then 1st positional arg will be "foo=bar".
# If this script was executed by csh, then a shell variable "foo" will have
# the value "var".
set foo=bar
echo "$*"
__EOF__
chmod 777 conftest.csh conftest.sh
(csh -f ./conftest.csh) 2> /dev/null
if test $? = 0 ; then
   :; SEDCMD="1d"
else
   :; SEDCMD=""
fi
rm -f conftest.csh conftest.sh

if test -z "$prefix"
then
  echo checking for gzip to derive installation directory prefix
  saveifs="$IFS"; IFS="$IFS:"
  for dir in $PATH; do
    test -z "$dir" && dir=.
    if test $dir != . && test -f $dir/gzip; then
      # Not all systems have dirname.
      prefix=`echo $dir|sed 's%/[^/][^/]*$%%'`
      break
    fi
  done
  IFS="$saveifs"
fi

if test -n "$prefix"; then
  test -z "$exec_prefix" && exec_prefix='${prefix}'
  prsub="s%^prefix\\([ 	]*\\)=\\([ 	]*\\).*$%prefix\\1=\\2$prefix%"
fi
if test -n "$exec_prefix"; then
  prsub="$prsub
s%^exec_prefix\\([ 	]*\\)=\\([ 	]*\\).*$%\
exec_prefix\\1=\\2$exec_prefix%"
fi

trap 'rm -f config.status; exit 1' 1 3 15
echo creating config.status
rm -f config.status
cat > config.status <<EOF
#!/bin/sh
# Generated automatically by configure.
# Run this file to recreate the current configuration.
# This directory was configured as follows,
# on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
#
# $0 $*

for arg
do
  case "\$arg" in
    -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
    exec /bin/sh $0 $* ;;
    *) echo "Usage: config.status --recheck" 2>&1; exit 1 ;;
  esac
done

trap 'rm -f Makefile; exit 1' 1 3 15
CC='$CC'
INSTALL='$INSTALL'
INSTALL_PROGRAM='$INSTALL_PROGRAM'
INSTALL_DATA='$INSTALL_DATA'
CPP='$CPP'
ALLOCA='$ALLOCA'
OBJA='$OBJA'
SEDCMD='$SEDCMD'
LIBS='$LIBS'
srcdir='$srcdir'
DEFS='$DEFS'
prefix='$prefix'
exec_prefix='$exec_prefix'
prsub='$prsub'
EOF
cat >> config.status <<\EOF

top_srcdir=$srcdir
for file in .. Makefile; do if [ "x$file" != "x.." ]; then
  srcdir=$top_srcdir
  # Remove last slash and all that follows it.  Not all systems have dirname.
  dir=`echo $file|sed 's%/[^/][^/]*$%%'`
  if test "$dir" != "$file"; then
    test "$top_srcdir" != . && srcdir=$top_srcdir/$dir
    test ! -d $dir && mkdir $dir
  fi
  echo creating $file
  rm -f $file
  echo "# Generated automatically from `echo $file|sed 's|.*/||'`.in by configure." > $file
  sed -e "
$prsub
s%@CC@%$CC%g
s%@INSTALL@%$INSTALL%g
s%@INSTALL_PROGRAM@%$INSTALL_PROGRAM%g
s%@INSTALL_DATA@%$INSTALL_DATA%g
s%@CPP@%$CPP%g
s%@ALLOCA@%$ALLOCA%g
s%@OBJA@%$OBJA%g
s%@SEDCMD@%$SEDCMD%g
s%@LIBS@%$LIBS%g
s%@srcdir@%$srcdir%g
s%@DEFS@%$DEFS%
" $top_srcdir/${file}.in >> $file
fi; done

EOF
chmod +x config.status
test -n "$no_create" || ./config.status