#!/bin/sh
#
# $Header: /cvs/src/chrony/configure,v 1.30 2003/09/22 21:53:57 richard Exp $
#
# =======================================================================
#
# chronyd/chronyc - Programs for keeping computer clocks accurate.
#
# Copyright (C) Richard P. Curnow  1997-2003
#
# =======================================================================

# This configure script determines the operating system type and version

if [ "x${CC}" = "x" ]; then
  MYCC="gcc"
else
  MYCC="${CC}"
fi

if [ "x${CFLAGS}" = "x" ]; then
  MYCFLAGS="-O2 -g"
else
  MYCFLAGS="${CFLAGS}"
fi

# ======================================================================
# FUNCTIONS

#{{{ test_for_sqrt
test_for_sqrt () {
# 0 : doesn't need -lm
# 1 : needs -lm
# 2 : doesn't even link with -lm

  cat >docheck.c <<EOF;
#include <math.h>
int main(int argc, char **argv) {
  return (int) sqrt((double)argc);
}
EOF

  ${MYCC} ${MYCFLAGS} -c -o docheck.o docheck.c >/dev/null 2>&1
  if [ $? -eq 0 ]
  then
    ${MYCC} ${MYCFLAGS} -o docheck docheck.o >/dev/null 2>&1
    if [ $? -eq 0 ]
    then
      result=0
    else
      ${MYCC} ${MYCFLAGS} -o docheck docheck.o -lm >/dev/null 2>&1
      if [ $? -eq 0 ]
      then
        result=1
      else
        result=2
      fi
    fi
  else
    result=2
  fi

  rm -f docheck.c docheck.o docheck
  echo $result
}
#}}}
#{{{ test_for_stdint_h
test_for_stdint_h () {
  cat >docheck.c <<EOF;
#include <stdint.h>
int main(int argc, char **argv) {
  return 0;
}
EOF

  ${MYCC} ${MYCFLAGS} -c -o docheck.o docheck.c >/dev/null 2>&1
  if [ $? -eq 0 ]
  then
    result=0
  else
    result=1
  fi

  rm -f docheck.c docheck.o
  echo $result
}
#}}}
#{{{ test_for_inttypes_h
test_for_inttypes_h () {
  cat >docheck.c <<EOF;
#include <inttypes.h>
int main(int argc, char **argv) {
  return 0;
}
EOF

  ${MYCC} ${MYCFLAGS} -c -o docheck.o docheck.c >/dev/null 2>&1
  if [ $? -eq 0 ]
  then
    result=0
  else
    result=1
  fi

  rm -f docheck.c docheck.o
  echo $result
}
#}}}
#{{{ usage
usage () {
  cat <<EOF;
\`configure' configures tdl to adapt to many kinds of systems.

Usage: ./configure [OPTION]...

Defaults for the options are specified in brackets.

Configuration:
  -h, --help              display this help and exit

Installation directories:
  --prefix=PREFIX         install architecture-independent files in PREFIX
                          [/usr/local]

By default, \`make install' will install all the files in
\`/usr/local/bin', \`/usr/local/lib' etc.  You can specify
an installation prefix other than \`/usr/local' using \`--prefix',
for instance \`--prefix=$HOME'.

For better control, use the options below.
  --disable-readline     Don't try to use GNU readline
  --readline-dir=DIR     Specify parent of readline include and lib directories
  --readline-inc-dir=DIR Specify where readline include directory is
  --readline-lib-dir=DIR Specify where readline lib directory is
  --with-ncurses-library=DIR Specify where ncurses lib directory is

Fine tuning of the installation directories:
  --infodir=DIR          info documentation [PREFIX/info]
  --mandir=DIR           man documentation [PREFIX/man]

Some influential environment variables:
  CC          C compiler command
  CFLAGS      C compiler flags
  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
              nonstandard directory <lib dir>

Use these variables to override the choices made by \`configure' or to help
it to find libraries and programs with nonstandard names/locations.

Report bugs to <rc@rc0.org.uk>.
EOF

}
#}}}

# ======================================================================



OPERATINGSYSTEM=`uname -s`
VERSION=`uname -r`
MACHINE=`uname -m`

SYSTEM=${OPERATINGSYSTEM}-${MACHINE}

EXTRA_LIBS=""
EXTRA_CLI_LIBS=""
EXTRA_OBJECTS=""
EXTRA_DEFS=""
INSTALL_PREFIX=/usr/local
SYSDEFS=""

# Support for readline (on by default)
feat_readline=1
readline_lib=""
readline_inc=""
ncurses_lib=""

SETINFODIR=""
SETMANDIR=""

for option
do
    case "$option" in
    --prefix=* | --install_prefix=* )
      INSTALL_PREFIX=`echo $option | sed -e 's/[^=]*=//;'`
    ;;
    --trace )
      EXTRA_DEFS="-DTRACEON"
    ;;
    --disable-readline )
      feat_readline=0
    ;;
    --with-readline-library=* )
      readline_lib=-L`echo $option | sed -e 's/^.*=//;'`
    ;;
    --with-readline-includes=* )
      readline_inc=-I`echo $option | sed -e 's/^.*=//;'`
    ;;
    --with-ncurses-library=* )
      ncurses_lib=-L`echo $option | sed -e 's/^.*=//;'`
    ;;
    --infodir=* )
      SETINFODIR=`echo $option | sed -e 's/^.*=//;'`
    ;;
    --mandir=* )
      SETMANDIR=`echo $option | sed -e 's/^.*=//;'`
    ;;
    --help | -h )
      usage
      exit 0
    ;;
    * )
    echo "Unrecognized option : " $option
    esac
done

case $SYSTEM in
    SunOS-sun4* )
    case $VERSION in
        4.* )
            EXTRA_OBJECTS="sys_sunos.o strerror.o"
            EXTRA_LIBS="-lkvm"
            SYSDEFS="-DSUNOS"
            echo "Configuring for SunOS (" $SYSTEM "version" $VERSION ")"
        ;;
        5.* )
            EXTRA_OBJECTS="sys_solaris.o"
            EXTRA_LIBS="-lsocket -lnsl -lkvm -lelf"
            EXTRA_CLI_LIBS="-lsocket -lnsl"
            SYSDEFS="-DSOLARIS"
            echo "Configuring for Solaris (" $SYSTEM "SunOS version" $VERSION ")"
            if [ $VERSION = "5.3" ]; then
                SYSDEFS="$SYSDEFS -DHAS_NO_BZERO"
                echo "Using memset() instead of bzero()"
            fi
        ;;
    esac
    ;;
    Linux* )
        EXTRA_OBJECTS="sys_linux.o wrap_adjtimex.o rtc_linux.o"
        SYSDEFS="-DLINUX"
        echo "Configuring for " $SYSTEM
        if [ "${MACHINE}" = "alpha" ]; then
           echo "Enabling -mieee"
           # FIXME: Should really test for GCC
           SYSDEFS="$SYSDEFS -mieee -DALPHA"
        fi
    ;;

    BSD/386-i[3456]86|FreeBSD-i386 )
        # Antti Jrvinen <costello@iki.fi> reported that this system can
        # be supported with the SunOS 4.x driver files.
        EXTRA_OBJECTS="sys_sunos.o strerror.o"
        EXTRA_LIBS="-lkvm"
        SYSDEFS="-DSUNOS"
        echo "Configuring for BSD/386 (using SunOS driver)"
    ;;
    NetBSD-* )
        EXTRA_OBJECTS="sys_netbsd.o"
        EXTRA_LIBS="-lkvm"
        SYSDEFS=""
        echo "Configuring for $SYSTEM"
    ;;
    SunOS-i86pc* )                                          
        # Doug Woodward <dougw@whistler.com> reported that this configuration
        # works for Solaris 2.8 / SunOS 5.8 on x86 platforms
        EXTRA_OBJECTS="sys_solaris.o"                
        EXTRA_LIBS="-lsocket -lnsl -lkvm -lelf"      
        EXTRA_CLI_LIBS="-lsocket -lnsl"                              
        SYSDEFS="-DSOLARIS"                               
        echo "Configuring for Solaris (" $SYSTEM "SunOS version" $VERSION ")" 
    ;;                                                                        
    CYGWIN32_NT-i[3456]86 )
        EXTRA_OBJECTS="sys_winnt.o"
        EXTRA_LIBS=""
        SYSDEFS="-DWINNT"
        echo "Configuring for Windows NT (Cygwin32)"
    ;;
    * )
        echo "Sorry, I don't know how to build this software on your system."
        exit 1
    ;;
esac

printf "Checking if sqrt() needs -lm : "
case `test_for_sqrt`
in
0)
  printf "No\n"
  LIBS=""
;;
1)
  printf "Yes\n"
  LIBS="-lm"
;;
*)
  printf "\nCan't compile/link a program which uses sqrt(), bailing out\n"
  exit 1
;;
esac

printf "Checking for <stdint.h> : "
if [ `test_for_stdint_h` -eq 0 ]; then
  printf "Yes\n"
  SYSDEFS="${SYSDEFS} -DHAS_STDINT_H"
else
  printf "No\n"
fi

printf "Checking for <inttypes.h> : "
if [ `test_for_inttypes_h` -eq 0 ]; then
  printf "Yes\n"
  SYSDEFS="${SYSDEFS} -DHAS_INTTYPES_H"
else
  printf "No\n"
fi

if [ "x${MYCC}" = "xgcc" ]; then
  CCWARNFLAGS="-Wmissing-prototypes -Wall"
else
  CCWARNFLAGS=""
fi

if [ $feat_readline = "1" ]; then
  READLINE_COMPILE="-DFEAT_READLINE=1 $readline_inc"
  READLINE_LINK="$readline_lib $ncurses_lib -lreadline -lncurses"
else
  READLINE_COMPILE=""
  READLINE_LINK=""
fi

MANDIR=${INSTALL_PREFIX}/man
INFODIR=${INSTALL_PREFIX}/info
if [ "x$SETINFODIR" != "x" ]; then
  INFODIR=$SETINFODIR
fi
if [ "x$SETMANDIR" != "x" ]; then
  MANDIR=$SETMANDIR
fi

sed -e "s%@EXTRA_OBJECTS@%${EXTRA_OBJECTS}%;\
	s%@CC@%${MYCC}%;\
	s%@CFLAGS@%${MYCFLAGS}%;\
	s%@CCWARNFLAGS@%${CCWARNFLAGS}%;\
	s%@LIBS@%${LIBS}%;\
	s%@EXTRA_LIBS@%${EXTRA_LIBS}%;\
	s%@SYSDEFS@%${SYSDEFS}%;\
	s%@EXTRA_DEFS@%${EXTRA_DEFS}%;\
	s%@EXTRA_CLI_LIBS@%${EXTRA_CLI_LIBS}%;\
	s%@READLINE_COMPILE@%${READLINE_COMPILE}%;\
	s%@READLINE_LINK@%${READLINE_LINK}%;\
	s%@INSTALL_PREFIX@%${INSTALL_PREFIX}%;\
	s%@MANDIR@%${MANDIR}%;\
	s%@INFODIR@%${INFODIR}%;"\
	< Makefile.in > Makefile

# =======================================================================
# vim:et:sw=2:ht=2:sts=2:fdm=marker:cms=#%s