AC_PREREQ([2.71])

AC_INIT([MPUIO Library],[1.0.3],[Andrey V.Kosteltsev <support@radix-linux.su>],[libmpuio],[https://radix-linux.su])

AC_LIBMPUIO_REQUIRE_BASH

AC_LIBMPUIO_HEADLINE([libmpuio], [Formatted I/O Library], [LIBMPUIO_VERSION],dnl
[Copyright (c) 1999-2026 Andrey V.Kosteltsev])dnl

AC_MSG_CFG_PART(Getting the canonical system type)
dnl
dnl NOTE: Следующие вызовы должны осуществляться строго до
dnl       вызова AM_INIT_AUTOMAKE .
dnl
dnl Для библиотеки достаточно вызвать AC_CANONICAL_HOST и при этом
dnl будут определены build_alias и host_alias. Однако опция --target
dnl будет запрещена.
dnl
dnl Для программ достаточно задать AC_CANONICAL_TARGET и при этом
dnl будут определены build_alias, host_alias и target_alias. Естественно
dnl будут доступны все три опции: --build, --host, и --target .
dnl

AC_CANONICAL_HOST
AC_CANONICAL_TARGET
AC_USE_SYSTEM_EXTENSIONS

dnl Должна вызываться строго после AC_CANONICAL_TARGET .
AC_ARG_PROGRAM

AC_MSG_CFG_PART(Init Automake environment)
AM_INIT_AUTOMAKE([dist-xz no-dist-gzip])

AC_CONFIG_SRCDIR(acsite.m4)
AC_CONFIG_HEADERS(config.h)
AC_CONFIG_MACRO_DIRS([m4])

AC_MSG_CFG_PART(Test for GNU Compiler Colection)
AC_PROG_CC
if test $ac_cv_c_compiler_gnu != yes; then
   AC_MSG_ERROR([
********   ${TB}The MPU Library should be compiled using the GNU compiler only.${TN}])
fi
AC_SUBST(cross_compiling)
AC_PROG_CPP

AC_MSG_CFG_PART(Test for alias attribute)
LIBMPUIO_ALIAS_ATTRIBUTE

AC_MSG_CFG_PART(Test for hidden visibility attribute)
LIBMPUIO_HIDDEN_VISIBILITY_ATTRIBUTE

AC_MSG_CFG_PART(Test for Target Machine Data Types)
AC_GCC_TYPES
AC_MSG_CFG_PART(Test for Target Machine Size of Data Types)
AC_GCC_SIZEOF_TYPES
AC_GCC_WIDTH_OF_TYPES
AC_MSG_CFG_PART(Test for Target Machine Byte Order)
AC_GCC_BYTE_ORDER
AC_GCC_FLOAT_WORD_ORDER
AC_MSG_CFG_PART(Test for Target Machine Programming Model)
AC_GCC_PROGRAMMING_MODEL
AC_MSG_CFG_PART(Test for Target Machine Register Width)
AC_GCC_REGISTER_WIDTH

AC_MSG_CFG_PART(Test for GNU Binutils)
LIBMPUIO_PROG_BINUTILS

AC_MSG_CFG_PART(Test how to build C programs using POSIX threads)
AX_PTHREAD([
   LIBS="$PTHREAD_LIBS $LIBS"
   CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
   CC="$PTHREAD_CC"])

AC_MSG_CFG_PART(Test for GNU Source)
AC_USE_SYSTEM_EXTENSIONS

if test $host != $build; then
  AC_MSG_CFG_PART(Test for Build Machile Compiler)
  AC_PROG_BUILD_CC
  AC_PATH_PROG_BUILD_STRIP_S
fi

AC_SUBST(BUILD_CFLAGS)
AC_SUBST(BUILD_LDFLAGS)
AC_ARG_VAR([BUILD_CC],[Build C compiler command])
AC_ARG_VAR([BUILD_CFLAGS],[Build C compiler flags])
AC_ARG_VAR([BUILD_LDFLAGS],[Build linker flags, e.g. -L<lib dir> if you have libraries in a
                            nonstandard directory <lib dir>])

AC_MSG_CFG_PART(Test for GCC builtin functions)
AX_GCC_BUILTIN([__builtin_popcount])
AX_GCC_BUILTIN([__builtin_parity])

AC_MSG_CFG_PART(Test for GNU libtool)
LT_PREREQ([2.4.6])
LT_INIT
AC_SUBST([LIBTOOL_DEPS])

AC_MSG_CFG_PART(Test for libtool VERSION Information)
AC_LIBMPUIO_LT_VERSION_INFO

AC_MSG_CFG_PART(Test for LD_LIBRARY_PATH Environment Variable)
AC_LD_LIBRARY_PATH

dnl
dnl End of arguments to specify other packages/features.
dnl ============================================================



dnl ============================================================
dnl Locate tools:
dnl ============================================================

AC_MSG_CFG_PART(Test for Header files)
dnl
dnl  Check for system header files.
dnl  =============================
dnl  /* GetText частично проверил. Но мы делаем для себя. */
AC_CHECK_INCLUDES_DEFAULT
AC_PROG_EGREP

AC_CHECK_HEADERS( locale.h )
AC_CHECK_HEADERS( sys/types.h sys/stat.h stdlib.h stddef.h )
AC_CHECK_HEADERS( memory.h string.h strings.h )
AC_CHECK_HEADERS( inntypes.h stdint.h unistd.h )
AC_CHECK_HEADERS( fcntl.h errno.h )
AC_CHECK_HEADERS( sys/file.h )
AC_CHECK_HEADERS( sys/uio.h )
AC_CHECK_HEADERS( sys/wait.h )
AC_CHECK_HEADERS( stdarg.h )
AC_CHECK_HEADERS( sys/time.h )
AC_CHECK_HEADERS( limits.h )
AC_CHECK_HEADERS( endian.h )
AC_CHECK_HEADERS( ctype.h )
AC_CHECK_HEADERS( uchar.h )
AC_CHECK_HEADERS( pthread.h )
AC_CHECK_HEADERS_ONCE([sys/time.h])


AC_MSG_CFG_PART(Test for Libc functions)
dnl
dnl  Check for glibc funcs.
dnl  =============================
dnl  /* GetText частично проверил. Но мы делаем для себя. */
AC_CHECK_FUNCS([iconv putenv setenv setlocale])

AC_MSG_CFG_PART(Test for LibMPU)
dnl ============================================================
dnl Check for LibMPU
dnl ============================================================
dnl AC_CHECK_HEADERS( libmpu.h )
AC_CHECK_LIBMPU(
  [1.0.20],
  [yes],
  [
    AC_DEFINE(
      [HAVE_LIBMPU],
      [1],
      [Define to 1 if LibMPU is available.]
    )
  ],
  [
    AC_MSG_ERROR([LibMPU version 1.0.20 or later is required.])
  ]
)


# TODO: check programs


test -n "$critic_missing" && AC_MSG_ERROR([
********   ${TB}These critical programs are missing or too old: $critic_missing${TN}
********   ${TB}Check the INSTALL file for required versions.${TN}])

test -n "$aux_missing" && AC_MSG_WARN([
********   ${TB}These auxiliary programs are missing or too old: $aux_missing${TN}
********   ${TB}some features will be disabled.${TN}
********   ${TB}Check the INSTALL file for required versions.${TN}])

dnl
dnl End of locate tools:
dnl ============================================================


dnl ============================================================
dnl Define variables accoring to arguments:
dnl ============================================================

# if using special system headers, find out the compiler's sekrit
# header directory and add that to the list.  NOTE: Only does the
# right thing on a system that doesn't need fixincludes.
# (Not presently a problem.)
if test -n "$sysheaders"; then
  SYSINCLUDES=-nostdinc
  for d in include include-fixed; do
    i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
    SYSINCLUDES="$SYSINCLUDES -isystem $i"
  done
  SYSINCLUDES="$SYSINCLUDES -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
fi
AC_SUBST(SYSINCLUDES)

dnl
dnl End of variables definition.
dnl ============================================================


AC_MSG_CFG_PART(OUTPUT Substitutions)
AC_CONFIG_FILES([ Makefile
                  src/Makefile
                  mpuio-config
                  mpuio.pc
                  man/Makefile
                  man/ru/Makefile])
AC_OUTPUT

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 ${TB}libmpu${TN},"
  echo "  \`${TB}make dist${TN}'      to create distributable tarballs, or"
  echo "  \`${TB}make distclean${TN}' to clean before configure for another target."
  echo "Good luck."
  echo ""
fi