configure.in

cygwin, 著名的在win32下模拟unix操作系统的东东

dnl This is the newlib/libm configure.in file.
dnl Process this file with autoconf to produce a configure script.

AC_PREREQ(2.5)
AC_INIT(libm.texinfo)

AC_ARG_ENABLE(newlib_hw_fp,
[  --enable-newlib-hw-fp    Turn on hardware floating point math],
[case "${enableval}" in
   yes) newlib_hw_fp=true ;;
   no)  newlib_hw_fp=false ;;
   *) AC_MSG_ERROR(bad value ${enableval} for --enable-newlib-hw-fp) ;;
 esac],[newlib_hw_fp=false])
AM_CONDITIONAL(NEWLIB_HW_FP, test x$newlib_hw_fp = xtrue)

dnl Can't be done in NEWLIB_CONFIGURE because that confuses automake. 
AC_CONFIG_AUX_DIR(../..)

NEWLIB_CONFIGURE(..)

dnl We have to enable libtool after NEWLIB_CONFIGURE because if we try and
dnl add it into NEWLIB_CONFIGURE, executable tests are made before the first
dnl line of the macro which fail because appropriate LDFLAGS are not set.

if test "${use_libtool}" = "yes"; then
AC_LIBTOOL_WIN32_DLL
AM_PROG_LIBTOOL
fi

LIBM_MACHINE_LIB=
if test -n "${machine_dir}"; then
  AC_CONFIG_SUBDIRS(machine)
  if test "${use_libtool}" = "yes"; then
    LIBM_MACHINE_LIB=machine/${machine_dir}/lib${machine_dir}.${aext}
  else
    LIBM_MACHINE_LIB=machine/lib.${aext}
  fi
fi

AC_SUBST(LIBM_MACHINE_LIB)

AC_OUTPUT(Makefile math/Makefile mathfp/Makefile common/Makefile)