source: downloads/boost_1_33_1/libs/config/tools/configure.in @ 25

#
# the following variables contain our macro definitions:
#
required_defs=""
required_undefs=""

dnl Process this file with autoconf to produce a configure script.
dnl disable cache processing, it has no effect here:
define([AC_CACHE_LOAD], )dnl
define([AC_CACHE_SAVE], )dnl
AC_INIT(./tools/configure.in)


AC_ARG_ENABLE(test,   --enable-test             tests current settings rather than defining new ones)

if test "foo"$enable_test = "foo"; then
   enable_test="no"
fi

cat << EOF
*** $0: boost configuration utility ***

Please stand by while exploring compiler capabilities...
Be patient - this could take some time...

Note that this test script only gives an approximate
configuration - you will need to test the results carefully
using the boost regression test suite before using the results.
EOF

if test $enable_test = 'yes'; then

cat << EOF

This script reports only the difference between the detected
configuration, and the existing boost configuration.  Its 
primary aim is to quickly report how well boost is configured
for one compiler.

***

EOF

else

cat << EOF

***

EOF
fi

AC_ARG_ENABLE(extension,[--enable-extension=<ext>],
[
case "$enableval" in
   no) AC_MSG_RESULT(Info :.cpp used as extension for tests) 
       ac_ext=cpp 
         ;;
    *) AC_MSG_RESULT(Argument : .$enableval used as extension) 
   ac_ext=$enableval
esac
],
[AC_MSG_RESULT(Info : .cpp used as extension for tests) 
   ac_ext=cpp
]
)

dnl figure out which version of sed to use, on some platforms
dnl the version in the path is not Unix conforming (MacOS X ? )

if test -f /bin/sed ; then
   SED=/bin/sed
else
   if test -f /usr/bin/sed ; then
      SED=/usr/bin/sed
   else
      SED=sed
   fi
fi

dnl Set the boost main directory.
AC_MSG_CHECKING(for boost main tree)
boost_base=
AC_ARG_WITH(boost,
  AC_HELP_STRING([--with-boost=DIR],[path to the boost main tree]),
  [
  #echo "--with boost is set"
  if test "x$withval" != "x"; then
    if test "x$withval" != no; then
      boost_base=`echo "$withval" | $SED 's,//*,/,g' | $SED 's,/$,,'`
      #echo boost_base=$boost_base
      if test -f "$boost_base/boost/config.hpp"; then
        if test -f "$boost_base/libs/config/configure"; then :; else
          boost_base=
          #echo "$boost_base/libs/config/configure" not found
        fi
      else
        #echo "$boost_base/boost/config.hpp" not found
        boost_base=
      fi
    fi
  fi
  ]
)
if test "x$boost_base" = "x"; then
  #echo '$0 = ' $0
  boost_base=`expr "x$0" : 'x\(.*\)/@<:@/@:>@*' \| '.'`
  boost_base="$boost_base/../.."
  #echo boost_base=$boost_base
  if test -f "$boost_base/boost/config.hpp"; then
    if test -f "$boost_base/libs/config/configure"; then :; else
      boost_base=
    fi
  else
    boost_base=
  fi
fi
if test "x$boost_base" != "x"; then
  AC_MSG_RESULT([$boost_base])
else
  AC_MSG_RESULT([not found])
  AC_MSG_ERROR([The boost main tree was not found.
  Specify its location by the --with-boost option.])
fi
  


# Save that, as it is being redefined several times 
use_ac_ext=$ac_ext

AC_PROG_CXX
ac_ext=$use_ac_ext

AC_LANG_CPLUSPLUS

OLD_CXXFLAGS="$CXXFLAGS"


if test $enable_test = 'yes'; then
   CXXFLAGS="-I$boost_base -I$boost_base/libs/config/test $CXXFLAGS"
else
   CXXFLAGS="-I$boost_base -I$boost_base/libs/config/test $CXXFLAGS -DBOOST_NO_CONFIG"
fi

# add the -AA conformance option to CXXFLAGS for HP aCC only
if test $CXX = 'aCC'; then
   CXXFLAGS="-AA $CXXFLAGS"
fi

dnl check for some standard libraries
dnl without these some of the tests may fail:

AC_CHECK_LIB(pthread, pthread_exit)
AC_CHECK_LIB(m, cos)
AC_CHECK_LIB(rt, clock)

#
# enumerate test files and test each one:
#
for file in $boost_base/libs/config/test/boost_no*.ipp; do

   basename=`echo $file | $SED 's/.*boost_\(.*\)\.ipp/\1/'`
   macroname=`cat $file | grep '^//[[   ]]*MACRO:' | $SED 's/.*MACRO:[[         ]]*\([[_A-Z0-9]]*\).*/\1/'`
   title=`cat $file | grep '^//[[       ]]*TITLE:' | $SED 's/.*TITLE:[[         ]]*\([[^        ]].*\)/\1/'`
   namespace=`echo $macroname | tr [[A-Z]] [[a-z]]`

#echo file      = $file
#echo basename  = $basename
#echo macroname = $macroname
#echo title     = $title
#echo namespace = $namespace

   ac_ext=$use_ac_ext
   if test $enable_test = 'yes'; then
      AC_MSG_CHECKING($title (pass expected) )
   else
      AC_MSG_CHECKING($title )
   fi
   AC_TRY_RUN(
   [
#include <boost/config.hpp>
#include "test.hpp"

#if !defined($macroname) || defined(BOOST_NO_CONFIG)
#include "boost_$basename.ipp"
#else
namespace ${namespace} = empty_boost;
#endif

int main(){ return ${namespace}::test(); } ]
   ,
   [AC_MSG_RESULT(OK)]
   ,
   [AC_MSG_RESULT(Failed)
   required_defs="$macroname $required_defs"]
   )

   if test $enable_test = 'yes'; then
   
   ac_ext=$use_ac_ext
   AC_MSG_CHECKING($title (fail expected) )
   AC_TRY_RUN(
   [
#include <boost/config.hpp>
#include "test.hpp"

#ifdef $macroname
#include "boost_$basename.ipp"
#else
#error "this file should not compile"
#endif

int main() { return ${namespace}::test(); }]
   ,
   [AC_MSG_RESULT(failed)
   required_undefs="$macroname $required_undefs"]
   ,
   [AC_MSG_RESULT(OK)]
   )
   
   fi

done

#
# enumerate optional test files and test each one:
#
for file in $boost_base/libs/config/test/boost_has*.ipp; do

   basename=`echo $file | $SED 's/.*boost_\(.*\)\.ipp/\1/'`
   macroname=`cat $file | grep '^//[[   ]]*MACRO:' | $SED 's/.*MACRO:[[         ]]*\([[_A-Z0-9]]*\).*/\1/'`
   title=`cat $file | grep '^//[[       ]]*TITLE:' | $SED 's/.*TITLE:[[         ]]*\([[^        ]].*\)/\1/'`
   namespace=`echo $macroname | tr [[A-Z]] [[a-z]]`

#  echo $file
#  echo $basename
#  echo $macroname
#  echo $title

   ac_ext=$use_ac_ext
   if test $enable_test = 'yes'; then
   AC_MSG_CHECKING($title (pass expected) )
   AC_TRY_RUN(
   [
#include <boost/config.hpp>
#include "test.hpp"

#ifdef $macroname
#include "boost_$basename.ipp"
#else
namespace ${namespace} = empty_boost;
#endif

int main(){ return ${namespace}::test(); }]
   ,
   [AC_MSG_RESULT(OK)]
   ,
   [AC_MSG_RESULT(Failed)
   required_undefs="$macroname $required_undefs"]
   )
   
   AC_MSG_CHECKING($title (fail expected) )
   AC_TRY_RUN(
   [
#include <boost/config.hpp>
#include "test.hpp"

#ifndef $macroname
#include "boost_$basename.ipp"
#else
#error "this file should not compile"
#endif

int main(){ return ${namespace}::test(); }]
   ,
   [
   AC_MSG_RESULT(failed)
   required_defs="$macroname $required_defs"
   ]
   ,
   [
   AC_MSG_RESULT(OK)
   ]
   )

   else

   ac_ext=$use_ac_ext
   AC_MSG_CHECKING($title)
   AC_TRY_RUN(
   [
#include <boost/config.hpp>
#include "test.hpp"

#include "boost_$basename.ipp"

int main(){ return ${namespace}::test(); }]
   ,
   [
      AC_MSG_RESULT(Yes)
      required_defs="$macroname $required_defs"
   ]
   ,
   [
      AC_MSG_RESULT(no)
   ]
   )
   
   fi

done


#echo $required_defs
#echo $required_undefs

if test $enable_test = 'yes'; then

if test "$required_defs" = ""; then
echo no boost macros need to be defined
echo no boost macros need to be defined >&5
else
echo the following macros need to be defined
echo    $required_defs
echo the following macros need to be defined >&5
echo    $required_defs >&5
fi
if test "$required_undefs" = ""; then
echo no boost macros need to be undefined
echo no boost macros need to be undefined >&5
else
echo "the following macros need to be undef'ed"
echo    $required_undefs
echo "the following macros need to be undef'ed" >&5
echo    $required_undefs >&5
fi

else

date_string=`date`

echo boost_base=$boost_base

cat > user.hpp << EOF
//  (C) Copyright Boost.org 2001.
//  Do not check in modified versions of this file,
//  This file may be customised by the end user, but not by boost.

//
//  Use this file to define a site and compiler specific
//  configuration policy, this version was auto-generated by
//  configure on ${date_string}
//  With the following options:
//    CXX      = ${CXX}
//    CXXFLAGS = ${CXXFLAGS}
//    LDFLAGS  = ${LDFLAGS}
//    LIBS     = ${LIBS}
//

// define this to disable all config options,
// excluding the user config.  Use if your
// setup is fully ISO complient, and has no
// useful extentions, or for autoconf generated
// setups:
#ifndef BOOST_NO_CONFIG
#  define BOOST_NO_CONFIG
#endif


// define if you want to disable threading support, even
// when available:
// #define BOOST_DISABLE_THREADS

// define if you want the regex library to use the C locale
// even on Win32:
// #define BOOST_REGEX_USE_C_LOCALE

// define this is you want the regex library to use the C++
// locale:
// #define BOOST_REGEX_USE_CPP_LOCALE


//
// options added by configure:
//
EOF

for name in $required_defs; do
echo '#define '"$name" >> user.hpp
done

cat_conts=`cat user.hpp`

#
# post configuration step:
#   
AC_MSG_CHECKING(original configuration )
rm -f conftest$ac_exeext
$CXX -I$boost_base $OLD_CXXFLAGS -DBOOST_NO_USER_CONFIG -o conftest$ac_exeext $LDFLAGS $boost_base/libs/config/test/config_info.cpp $LIBS >&5 2>&1
./conftest >&5 2>&1
AC_MSG_RESULT(done)
AC_MSG_CHECKING(new configuration )
rm -f conftest$ac_exeext
$CXX -I$boost_base -I$boost_base/libs/config $OLD_CXXFLAGS -DBOOST_USER_CONFIG='"user.hpp"' -o conftest$ac_exeext $LDFLAGS $boost_base/libs/config/test/config_info.cpp $LIBS >&5 2>&1
./conftest >&5 2>&1
AC_MSG_RESULT(done)

AC_OUTPUT(
[],
[
cat > user.hpp << EEEOF
${cat_conts}
EEEOF
cat << EEEOF

Adjustments to boost configuration have been written to
user.hpp.  Copy this to boost/config/user.hpp to use "as is",
or define BOOST_SITE_CONFIG to point to its location.

TREAT THIS FILE WITH CARE.
Autoconf generated options are not infallible!

EEEOF
],
[
cat_conts="$cat_conts"
]
)

fi