Math Processor Unit Library

libmpu – library of arithmetic functions for integer, real, and complex numbers of increased digit capacity

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libs/libmpu.git/trunk/configure.ac
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AC_PREREQ([2.71])

AC_LIBMPU_HEADLINE([libmpu], [MPU Emulation Library],dnl
[LIBMPU_VERSION], [configure.ac],dnl
[Copyright (c) 1999-2024 Andrey V.Kosteltsev])dnl


AC_INIT([MPU Library],[1.0.15],[Andrey V.Kosteltsev <support@radix-linux.su>],[libmpu],[https://radix-linux.su])

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)
LIBMPU_ALIAS_ATTRIBUTE

AC_MSG_CFG_PART(Test for hidden visibility attribute)
LIBMPU_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)
LIBMPU_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 Gettext)
AM_GNU_GETTEXT([external])
AM_GNU_GETTEXT_VERSION

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_LIBMPU_LT_VERSION_INFO

AC_MSG_CFG_PART(Test for LD_LIBRARY_PATH Environment Variable)
AC_LD_LIBRARY_PATH

dnl ============================================================
dnl Arguments to specify presence of other packages/features:
dnl ============================================================
AC_MSG_CFG_PART(Setting a limit of the real number's size)
AC_ARG_WITH([headers],
  AS_HELP_STRING([--with-headers=PATH],[location of system headers to use
                 (for example /usr/src/linux/include)
                 @<:@default=compiler default@:>@]),
  [sysheaders=$withval],
  [sysheaders=''])
AC_SUBST(sysheaders)

AC_ARG_WITH([real-io-limit],
AS_HELP_STRING([],[])
AS_HELP_STRING([--with-real-io-limit=SIZE_OF_REAL_NUMBER_IN_BITS],[maximum size of real numbers in bits for input/output(IO) operations.
                  Only the following values of argument are admissible:])
dnl AS_HELP_STRING([],[])
  AS_HELP_STRING([],[1024, 2048, 4096, 8192, 16384, 32768, 65536.])
dnl AS_HELP_STRING([],[])
AS_HELP_STRING([],[Maximum value is 65536. @<:@default=65536@:>@]),
  [real_io_limit=$withval],
  [real_io_limit=65536])
case $real_io_limit in
   1024) ;;
   2048) ;;
   4096) ;;
   8192) ;;
  16384) ;;
  32768) ;;
  65536) ;;
      *)
AC_MSG_WARN([
********   ${TB}Invalid value of real_io_limit: $real_io_limit${TN}
********   ${TB}for real number IO operations.${TN}
********   ${TB}The value of real_io_limit is set to 65536.${TN}])
    real_io_limit=65536
         ;;
esac

AC_ARG_WITH([real-math-f-limit],
AS_HELP_STRING([],[])
AS_HELP_STRING([--with-real-math-f-limit=SIZE_OF_REAL_NUMBER_IN_BITS],[maximum size of real numbers in bits for mathematic functions.
                This value has a higher priority than the value REAL_IO_LIMIT,
                so])
dnl AS_HELP_STRING([],[])
  AS_HELP_STRING([],[if real_io_limit < real_math_f_limit ; then])
    AS_HELP_STRING([],[real_io_limit = real_math_f_limit])
  AS_HELP_STRING([],[fi])
dnl AS_HELP_STRING([],[])
AS_HELP_STRING([],[Only the following values of argument are admissible:])
dnl AS_HELP_STRING([],[])
  AS_HELP_STRING([],[1024, 2048, 4096, 8192, 16384.])
dnl AS_HELP_STRING([],[])
AS_HELP_STRING([],[Maximum value is 16384. @<:@default=16384@:>@])
AS_HELP_STRING([],[]),
  [real_math_f_limit=$withval],
  [real_math_f_limit=16384])
case $real_math_f_limit in
   1024) ;;
   2048) ;;
   4096) ;;
   8192) ;;
  16384) ;;
      *)
AC_MSG_WARN([
********   ${TB}Invalid value of real_math_f_limit: $real_math_f_limit${TN}
********   ${TB}for mathematic operations.${TN}
********   ${TB}The value of real_math_f_limit is set to 16384.${TN}])
    real_math_f_limit=16384
         ;;
esac

test $real_io_limit -lt $real_math_f_limit && real_io_limit=$real_math_f_limit

AC_MSG_CHECKING([the maximum size of real numbers for IO operations])
AC_MSG_RESULT([${TB}$real_io_limit${TN}])
AC_MSG_CHECKING([the maximum size of real numbers for mathematic operations])
AC_MSG_RESULT([${TB}$real_math_f_limit${TN}])

AC_SUBST(LIBMPU_REAL_IO_LIMIT, $real_io_limit)
AC_SUBST(LIBMPU_REAL_MATH_F_LIMIT, $real_math_f_limit)
AC_SUBST(LIBMPU_REAL_MAX_WIDTH, $real_io_limit)



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_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])


# 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([ po/Makefile.in
                  Makefile
                  mpu/Makefile
                  include/libmpu.h
                  mpu-config
                  mpu.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
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© Andrey V. Kosteltsev, 2019 – 2025.