dnl Get a key from ruby's configuration table
AC_DEFUN([RUBY_CONFIG], [
          $RUBY -rrbconfig -e "puts(Config::CONFIG[['$1']] || '')"])

AC_DEFUN([RB_INIT_RUBY], [

AC_ARG_WITH(
    ruby,
    AC_HELP_STRING(
     --with-ruby=PATH,
     [ path to the ruby interpreter [[ruby]] ]),
    [ RUBY=$withval ],
    [ RUBY=ruby ])
AC_ARG_WITH(
    ruby_sitelibdir,
    AC_HELP_STRING(
     --with-ruby-sitelibdir=PATH,
     [ path to install ruby scripts [[auto-detect]] ]),
    [ ruby_sitelibdir=$withval ],
    [ ruby_sitelibdir=NONE ])

AC_SUBST(RUBY)

RUBY_VERSION_CODE=`$RUBY -e "puts RUBY_VERSION.gsub(/\./, '')"`
AC_SUBST(RUBY_VERSION_CODE)

RUBY_CONFIG_SO_NAME=`RUBY_CONFIG(RUBY_SO_NAME)`
RUBY_CONFIG_ARCHDIR=`RUBY_CONFIG(archdir)`
RUBY_CONFIG_ARCH=`RUBY_CONFIG(arch)`
RUBY_CONFIG_LIBDIR=`RUBY_CONFIG(libdir)`
RUBY_CONFIG_BINDIR=`RUBY_CONFIG(bindir)`
RUBY_CONFIG_RUBYHDRDIR=`RUBY_CONFIG(rubyhdrdir)`
RUBY_CONFIG_CFLAGS=`RUBY_CONFIG(CFLAGS)`
RUBY_CONFIG_LIBS=`RUBY_CONFIG(LIBS)`
RUBY_CONFIG_DLDLIBS=`RUBY_CONFIG(DLDLIBS)`
RUBY_CONFIG_LDFLAGS=`RUBY_CONFIG(LDFLAGS)`
RUBY_CONFIG_LIBRUBYARG=`RUBY_CONFIG(LIBRUBYARG)`
RUBY_CONFIG_LIBRUBYARG_STATIC=`RUBY_CONFIG(LIBRUBYARG_STATIC)`
RUBY_CONFIG_CCDLFLAGS=`RUBY_CONFIG(CCDLFLAGS)`

if test "x${RUBY_CONFIG_RUBYHDRDIR}x" != "xx"; then
  # 1.9
  RUBY_CPPFLAGS="-I${RUBY_CONFIG_RUBYHDRDIR}"
  RUBY_CPPFLAGS="${RUBY_CPPFLAGS} -I${RUBY_CONFIG_RUBYHDRDIR}/${RUBY_CONFIG_ARCH}"
else
  # 1.8
  RUBY_CPPFLAGS="-I${RUBY_CONFIG_ARCHDIR}"
fi
AC_SUBST(RUBY_CPPFLAGS)

RUBY_CFLAGS="${RUBY_CONFIG_CFLAGS} ${RUBY_CONFIG_CCDLFLAGS}"
AC_SUBST(RUBY_CFLAGS)

RUBY_CXXFLAGS="${RUBY_CONFIG_CFLAGS} ${RUBY_CONFIG_CCDLFLAGS}"
AC_SUBST(RUBY_CXXFLAGS)

RUBY_LDFLAGS="-L${RUBY_CONFIG_ARCHDIR} -L${RUBY_CONFIG_LIBDIR} ${RUBY_CONFIG_LDFLAGS}"
AC_SUBST(RUBY_LDFLAGS)

RUBY_LIBS="${RUBY_CONFIG_LIBS} ${RUBY_CONFIG_DLDLIBS}"
AC_SUBST(RUBY_LIBS)
 
RUBY_LIBRUBYARG="${RUBY_CONFIG_LIBRUBYARG}"
AC_SUBST(RUBY_LIBRUBYARG)

RUBY_LIBRUBYARG_STATIC="${RUBY_CONFIG_LIBRUBYARG_STATIC}"
AC_SUBST(RUBY_LIBRUBYARG_STATIC)

dnl If the user specified a prefix, then use it, otherwise defalut to
dnl the configured sitelibdir
if test "x${ruby_sitelibdir}x" != "xNONEx"
then
  RUBY_SITELIBDIR="${ruby_sitelibdir}"
else
  if test "x${prefix}x" = "xNONEx"
  then
    RUBY_SITELIBDIR=`RUBY_CONFIG(sitelibdir)`
  else
    sitelibdir_no_prefix=`$RUBY -rrbconfig \
    -e "include Config; \
    puts CONFIG[['sitelibdir']].sub(CONFIG[['prefix']], '')"`
    RUBY_SITELIBDIR="${prefix}/${sitelibdir_no_prefix}"
  fi
fi
AC_SUBST(RUBY_SITELIBDIR)

dnl The fourth parameter to AC_CHECK_HEADER keeps autoconf from
dnl searching for standard header files as a side-effect (which we want)
CPPFLAGS_save="${CPPFLAGS}"
CPPFLAGS="${CPPFLAGS} ${RUBY_CPPFLAGS}"
CXXFLAGS="${CPPFLAGS}"
AC_CHECK_HEADERS(ruby.h,,AC_MSG_ERROR(
                could not find ruby.h (check config.log)),[ ])
AC_CHECK_HEADERS(node.h,,,[
#include <ruby.h>
])
AC_CHECK_HEADERS(ruby/node.h,
                 [ AC_DEFINE(REALLY_HAVE_RUBY_NODE_H, [],
                             [ Define this macro to use ruby/node.h ]) ],
                             ,[
#include <ruby.h>
])
AC_CHECK_HEADERS(version.h,,,[
#include <ruby.h>
])
AC_CHECK_HEADERS(env.h,,,[
#include <ruby.h>
])

dnl We need to set the LD flags to include the path to this Ruby's
dnl library path so that this library check will work for ruby installs
dnl sitting in unconvential locations
save_ldflags="$LDFLAGS"
LDFLAGS="$RUBY_LDFLAGS"

AC_CHECK_LIB($RUBY_CONFIG_SO_NAME,
             rb_class_boot,
             [ AC_DEFINE(HAVE_RB_CLASS_BOOT, [], [
              Define this macro if rb_class_boot is defined ]) ] )

LDFLAGS="$save_ldflags"


CPPFLAGS="${CPPFLAGS_save}"

AC_MINGW32

if test x"${MINGW32}"x = xyesx; then
  RB_FIX_MINGW_LIBS
fi

]) dnl RB_INIT_RUBY

dnl We would like to be able to build using MingW against the one-click
dnl installer, which is built using VC6.  So, we detect this situation
dnl and fix up the link step if this is the case.
dnl
dnl Static linking isn't likely to work correctly, so we disable it by
dnl default, but if the user asks for LIBRUBYARG_STATIC, they'll still
dnl get static linking.
AC_DEFUN([RB_FIX_MINGW_LIBS], [
RUBY_LIBS=`echo ${RUBY_LIBS} | sed -e "s%oldnames.lib%-lmoldname%"`
RUBY_LIBS=`echo ${RUBY_LIBS} | sed -e "s%user32.lib%-luser32%"`
RUBY_LIBS=`echo ${RUBY_LIBS} | sed -e "s%advapi32.lib%-ladvapi32%"`
RUBY_LIBS=`echo ${RUBY_LIBS} | sed -e "s%ws2_32.lib%-lws2_32%"`
RUBY_LIBRUBYARG=`echo ${RUBY_LIBRUBYARG} | sed -e "s%\(msvcrt-ruby.*\).lib%${RUBY_CONFIG_BINDIR}/\1.dll%"`
RUBY_LIBRUBYARG_STATIC=`echo ${RUBY_LIBRUBYARG_STATIC} | sed -e "s%\(msvcrt-ruby.*\).lib%${RUBY_CONFIG_LIBDIR}/\1.lib%"`
]) dnl RB_FIX_MINGW_LIBS

dnl vim:ft=config