AC_PREREQ([2.69])

m4_include([acsite.m4])

AC_INIT([mcpu-cpp], [1.0.3], [], [mcpu-cpp])

AC_MCPU_CPP_REQUIRE_BASH

AC_MCPU_CPP_HEADLINE([mcpu-cpp], [MCPU Languages Preprocessor], [MCPU_CPP_VERSION],dnl
[Copyright (c) 1998-2026 Andrey V.Kosteltsev])dnl

AC_MSG_CFG_PART(Getting the canonical system type)
AC_CANONICAL_HOST

AC_MSG_CFG_PART(Init Automake environment)
AC_CONFIG_SRCDIR([src/main.c])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_MACRO_DIR([m4])
AM_INIT_AUTOMAKE([foreign dist-xz no-dist-gzip subdir-objects])

dnl With the project convention --prefix=/usr, system configuration belongs
dnl in /etc rather than /usr/etc unless the caller explicitly selects another
dnl sysconfdir.
if test "x$sysconfdir" = 'x${prefix}/etc'; then
  if test "x$prefix" = xNONE || test "x$prefix" = x/usr; then
    sysconfdir=/etc
  fi
fi

AC_MSG_CFG_PART(Test for GNU Compiler Collection)
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_CC
AC_PROG_LN_S
MCPU_CPP_REQUIRE_GCC

AC_MSG_CFG_PART(Test for LibMPUIO)
#MCPU_CPP_CHECK_LIBMPUIO
dnl ============================================================
dnl Check for LibMPU
dnl ============================================================
AC_CHECK_LIBMPU(
  [1.0.25],
  [yes],
  [
    AC_DEFINE(
      [HAVE_LIBMPU],
      [1],
      [Define to 1 if LibMPU is available.]
    )
    LIBMPU_VERSION=`$LIBMPU_CONFIG --version 2>/dev/null`
    AC_SUBST([LIBMPU_VERSION])
  ],
  [
    AC_MSG_ERROR([LibMPU version 1.0.25 or later is required.])
  ]
)

dnl ============================================================
dnl Check for LibMPUIO
dnl ============================================================
AC_CHECK_LIBMPUIO(
  [1.0.4],
  [yes],
  [
    AC_DEFINE(
      [HAVE_LIBMPUIO],
      [1],
      [Define to 1 if LibMPUIO is available.]
    )
    LIBMPUIO_VERSION=`$LIBMPUIO_CONFIG --version 2>/dev/null`
    AC_SUBST([LIBMPUIO_VERSION])
  ],
  [
    AC_MSG_ERROR([LibMPUIO version 1.0.4 or later is required.])
  ]
)

AC_MSG_CFG_PART(Test for LibMPU ABI)
MCPU_CPP_CHECK_LIBMPU_ABI

AC_MSG_CFG_PART(Define MCPU installation layout)

mcpu_cpp_prefix="$prefix"
if test "x$mcpu_cpp_prefix" = xNONE; then
  mcpu_cpp_prefix="$ac_default_prefix"
fi

mcpu_cpp_exec_prefix="$exec_prefix"
if test "x$mcpu_cpp_exec_prefix" = xNONE; then
  mcpu_cpp_exec_prefix="$mcpu_cpp_prefix"
fi

mcpu_cpp_save_prefix="$prefix"
mcpu_cpp_save_exec_prefix="$exec_prefix"
prefix="$mcpu_cpp_prefix"
exec_prefix="$mcpu_cpp_exec_prefix"
eval mcpu_cpp_bindir="\"$bindir\""
eval mcpu_cpp_libdir="\"$libdir\""
eval mcpu_cpp_sysconfdir="\"$sysconfdir\""
prefix="$mcpu_cpp_save_prefix"
exec_prefix="$mcpu_cpp_save_exec_prefix"

mcpu_cpp_root="$mcpu_cpp_libdir/mcpu"
mcpu_cpp_private_bindir="$mcpu_cpp_root/bin"
mcpu_cpp_private_etcdir="$mcpu_cpp_root/etc"
mcpu_cpp_private_includedir="$mcpu_cpp_root/include"

MCPU_CPP_ROOT="$mcpu_cpp_root"
MCPU_CPP_BINDIR="$mcpu_cpp_private_bindir"
MCPU_CPP_ETCDIR="$mcpu_cpp_private_etcdir"
MCPU_CPP_INCLUDEDIR="$mcpu_cpp_private_includedir"
AC_SUBST([MCPU_CPP_ROOT])
AC_SUBST([MCPU_CPP_BINDIR])
AC_SUBST([MCPU_CPP_ETCDIR])
AC_SUBST([MCPU_CPP_INCLUDEDIR])

mcpu_cpp_public_link_target="$mcpu_cpp_private_bindir/mcpu-cpp"
case "$mcpu_cpp_bindir:$mcpu_cpp_private_bindir" in
  "$mcpu_cpp_exec_prefix"/*:"$mcpu_cpp_exec_prefix"/*)
    mcpu_cpp_bindir_rel=${mcpu_cpp_bindir#"$mcpu_cpp_exec_prefix/"}
    mcpu_cpp_target_rel=${mcpu_cpp_private_bindir#"$mcpu_cpp_exec_prefix/"}
    mcpu_cpp_up=
    mcpu_cpp_rest=$mcpu_cpp_bindir_rel
    while :; do
      mcpu_cpp_up="../$mcpu_cpp_up"
      case "$mcpu_cpp_rest" in
        */*) mcpu_cpp_rest=${mcpu_cpp_rest#*/} ;;
        *) break ;;
      esac
    done
    mcpu_cpp_public_link_target="$mcpu_cpp_up$mcpu_cpp_target_rel/mcpu-cpp"
    ;;
esac
MCPU_CPP_PUBLIC_LINK_TARGET="$mcpu_cpp_public_link_target"
AC_SUBST([MCPU_CPP_PUBLIC_LINK_TARGET])

AC_DEFINE_UNQUOTED([MCPU_CPP_SYSTEM_CONFIG_FILE],
                   ["$mcpu_cpp_sysconfdir/mcpu/mcpu-cpp.conf"],
                   [Optional system-wide mcpu-cpp configuration override.])


AC_MSG_CFG_PART(OUTPUT Substitutions)
AC_CONFIG_FILES([
  Makefile
  src/Makefile
  tests/Makefile
  doc/Makefile
  man/Makefile
  man/ru/Makefile
  etc/Makefile
  etc/mcpu-cpp.conf
])
AC_OUTPUT

AC_MSG_CFG_PART(Configuration summary)
AC_MSG_NOTICE([mcpu-cpp configuration:])
AC_MSG_NOTICE([  version               : $PACKAGE_VERSION])
AC_MSG_NOTICE([  host                  : $host])
AC_MSG_NOTICE([  prefix                : $prefix])
AC_MSG_NOTICE([  install MCPU root     : $mcpu_cpp_root])
AC_MSG_NOTICE([  runtime config        : <runtime-root>/etc/mcpu-cpp.conf])
AC_MSG_NOTICE([  system override       : $mcpu_cpp_sysconfdir/mcpu/mcpu-cpp.conf])
AC_MSG_NOTICE([  runtime MCPU include  : <runtime-root>/include])
AC_MSG_NOTICE([  public command        : $mcpu_cpp_bindir/mcpu-cpp])
AC_MSG_NOTICE([  public symlink        : $mcpu_cpp_public_link_target])
AC_MSG_NOTICE([  mpuio-config          : $LIBMPUIO_CONFIG])
AC_MSG_NOTICE([  LibMPU version        : $LIBMPU_VERSION])
AC_MSG_NOTICE([  LibMPUIO version      : $LIBMPUIO_VERSION])
AC_MSG_NOTICE([  LibMPUIO CFLAGS       : $LIBMPUIO_CFLAGS])
AC_MSG_NOTICE([  LibMPUIO LDFLAGS      : $LIBMPUIO_LDFLAGS])
AC_MSG_NOTICE([  LibMPUIO LIBS         : $LIBMPUIO_LIBS])
AC_MSG_NOTICE([  LibMPU real I/O limit : $MCPU_CPP_MPU_REAL_IO_LIMIT])
AC_MSG_NOTICE([  LibMPU math fn limit  : $MCPU_CPP_MPU_MATH_FN_LIMIT])
AC_MSG_NOTICE([  LibMPU int max width  : $MCPU_CPP_MPU_INT_MAX_WIDTH])
AC_MSG_NOTICE([  LibMPU byte order     : $MCPU_CPP_MPU_BYTE_ORDER])
AC_MSG_NOTICE([  LibMPU word order     : $MCPU_CPP_MPU_WORD_ORDER])
AC_MSG_NOTICE([  machine reg width     : $MCPU_CPP_MPU_REGISTER_WIDTH])
AC_MSG_NOTICE([  size_t width          : $MCPU_CPP_SIZE_WIDTH])
AC_MSG_NOTICE([  ssize_t width         : $MCPU_CPP_SSIZE_WIDTH])

if test -f "config.h"; then
  echo ""
  echo "Now you can run:"
  echo "  \`${TB}make${TN}'           to compile,"
  echo "  \`${TB}make install${TN}'   to make and install ${TB}mcpu-cpp${TN},"
  echo "  \`${TB}make dist${TN}'      to create distributable tarballs, or"
  echo "  \`${TB}make distclean${TN}' to clean before configure for another target."
  echo "Enjoy."
  echo ""
fi