file/aclocal.m4

# generated automatically by aclocal 1.16.1 -*- Autoconf -*-

# Copyright (C) 1996-2018 Free Software Foundation, Inc.

# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.

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m4_ifndef([AC_AUTOCONF_VERSION],
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m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],,
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# visibility.m4 serial 6
dnl Copyright (C) 2005, 2008, 2010-2019 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

dnl From Bruno Haible.

dnl Tests whether the compiler supports the command-line option
dnl -fvisibility=hidden and the function and variable attributes
dnl __attribute__((__visibility__("hidden"))) and
dnl __attribute__((__visibility__("default"))).
dnl Does *not* test for __visibility__("protected") - which has tricky
dnl semantics (see the 'vismain' test in glibc) and does not exist e.g. on
dnl Mac OS X.
dnl Does *not* test for __visibility__("internal") - which has processor
dnl dependent semantics.
dnl Does *not* test for #pragma GCC visibility push(hidden) - which is
dnl "really only recommended for legacy code".
dnl Set the variable CFLAG_VISIBILITY.
dnl Defines and sets the variable HAVE_VISIBILITY.

AC_DEFUN([gl_VISIBILITY],
[
  AC_REQUIRE([AC_PROG_CC])
  CFLAG_VISIBILITY=
  HAVE_VISIBILITY=0
  if test -n "$GCC"; then
    dnl First, check whether -Werror can be added to the command line, or
    dnl whether it leads to an error because of some other option that the
    dnl user has put into $CC $CFLAGS $CPPFLAGS.
    AC_CACHE_CHECK([whether the -Werror option is usable],
      [gl_cv_cc_vis_werror],
      [gl_save_CFLAGS="$CFLAGS"
       CFLAGS="$CFLAGS -Werror"
       AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM([[]], [[]])],
         [gl_cv_cc_vis_werror=yes],
         [gl_cv_cc_vis_werror=no])
       CFLAGS="$gl_save_CFLAGS"
      ])
    dnl Now check whether visibility declarations are supported.
    AC_CACHE_CHECK([for simple visibility declarations],
      [gl_cv_cc_visibility],
      [gl_save_CFLAGS="$CFLAGS"
       CFLAGS="$CFLAGS -fvisibility=hidden"
       dnl We use the option -Werror and a function dummyfunc, because on some
       dnl platforms (Cygwin 1.7) the use of -fvisibility triggers a warning
       dnl "visibility attribute not supported in this configuration; ignored"
       dnl at the first function definition in every compilation unit, and we
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       if test $gl_cv_cc_vis_werror = yes; then
         CFLAGS="$CFLAGS -Werror"
       fi
       AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM(
            [[extern __attribute__((__visibility__("hidden"))) int hiddenvar;
              extern __attribute__((__visibility__("default"))) int exportedvar;
              extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
              extern __attribute__((__visibility__("default"))) int exportedfunc (void);
              void dummyfunc (void) {}
            ]],
            [[]])],
         [gl_cv_cc_visibility=yes],
         [gl_cv_cc_visibility=no])
       CFLAGS="$gl_save_CFLAGS"
      ])
    if test $gl_cv_cc_visibility = yes; then
      CFLAG_VISIBILITY="-fvisibility=hidden"
      HAVE_VISIBILITY=1
    fi
  fi
  AC_SUBST([CFLAG_VISIBILITY])
  AC_SUBST([HAVE_VISIBILITY])
  AC_DEFINE_UNQUOTED([HAVE_VISIBILITY], [$HAVE_VISIBILITY],
    [Define to 1 or 0, depending whether the compiler supports simple visibility declarations.])
])

# Copyright (C) 2002-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

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# AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-

# Copyright (C) 2001-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets
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# start a VPATH build or use an absolute $srcdir.
#
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# and then we would define $MISSING as
#   MISSING="\${SHELL} $am_aux_dir/missing"
# This will work as long as MISSING is not called from configure, because
# unfortunately $(top_srcdir) has no meaning in configure.
# However there are other variables, like CC, which are often used in
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#
# Another solution, used here, is to always expand $ac_aux_dir to an
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AC_DEFUN([AM_AUX_DIR_EXPAND],
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# Expand $ac_aux_dir to an absolute path.
am_aux_dir=`cd "$ac_aux_dir" && pwd`
])

# AM_CONDITIONAL                                            -*- Autoconf -*-

# Copyright (C) 1997-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

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# Copyright (C) 1999-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.


# There are a few dirty hacks below to avoid letting 'AC_PROG_CC' be
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  mkdir sub

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      # When given -MP, icc 7.0 and 7.1 complain thusly:
      #   icc: Command line warning: ignoring option '-M'; no argument required
      # The diagnosis changed in icc 8.0:
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        am_cv_$1_dependencies_compiler_type=$depmode
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    fi
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  cd ..
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else
  am_cv_$1_dependencies_compiler_type=none
fi
])
AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
AM_CONDITIONAL([am__fastdep$1], [
  test "x$enable_dependency_tracking" != xno \
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])


# AM_SET_DEPDIR
# -------------
# Choose a directory name for dependency files.
# This macro is AC_REQUIREd in _AM_DEPENDENCIES.
AC_DEFUN([AM_SET_DEPDIR],
[AC_REQUIRE([AM_SET_LEADING_DOT])dnl
AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
])


# AM_DEP_TRACK
# ------------
AC_DEFUN([AM_DEP_TRACK],
[AC_ARG_ENABLE([dependency-tracking], [dnl
AS_HELP_STRING(
  [--enable-dependency-tracking],
  [do not reject slow dependency extractors])
AS_HELP_STRING(
  [--disable-dependency-tracking],
  [speeds up one-time build])])
if test "x$enable_dependency_tracking" != xno; then
  am_depcomp="$ac_aux_dir/depcomp"
  AMDEPBACKSLASH='\'
  am__nodep='_no'
fi
AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno])
AC_SUBST([AMDEPBACKSLASH])dnl
_AM_SUBST_NOTMAKE([AMDEPBACKSLASH])dnl
AC_SUBST([am__nodep])dnl
_AM_SUBST_NOTMAKE([am__nodep])dnl
])

# Generate code to set up dependency tracking.              -*- Autoconf -*-

# Copyright (C) 1999-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# _AM_OUTPUT_DEPENDENCY_COMMANDS
# ------------------------------
AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
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  # TODO: see whether this extra hack can be removed once we start
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  AS_CASE([$CONFIG_FILES],
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  am_rc=0
  for am_mf
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    am_mf=`AS_ECHO(["$am_mf"]) | sed -e 's/:.*$//'`
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  AS_UNSET([am_dirpart])
  AS_UNSET([am_filepart])
  AS_UNSET([am_mf])
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  rm -f conftest-deps.mk
}
])# _AM_OUTPUT_DEPENDENCY_COMMANDS


# AM_OUTPUT_DEPENDENCY_COMMANDS
# -----------------------------
# This macro should only be invoked once -- use via AC_REQUIRE.
#
# This code is only required when automatic dependency tracking is enabled.
# This creates each '.Po' and '.Plo' makefile fragment that we'll need in
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AC_DEFUN([AM_OUTPUT_DEPENDENCY_COMMANDS],
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# Do all the work for Automake.                             -*- Autoconf -*-

# Copyright (C) 1996-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# This macro actually does too much.  Some checks are only needed if
# your package does certain things.  But this isn't really a big deal.

dnl Redefine AC_PROG_CC to automatically invoke _AM_PROG_CC_C_O.
m4_define([AC_PROG_CC],
m4_defn([AC_PROG_CC])
[_AM_PROG_CC_C_O
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# AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE])
# AM_INIT_AUTOMAKE([OPTIONS])
# -----------------------------------------------
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AC_DEFUN([AM_INIT_AUTOMAKE],
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AC_REQUIRE([AM_SET_CURRENT_AUTOMAKE_VERSION])dnl
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# Copyright (C) 2003-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
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# Check to see how 'make' treats includes.	            -*- Autoconf -*-

# Copyright (C) 2001-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
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# This file is free software; the Free Software Foundation
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# Copyright (C) 2001-2018 Free Software Foundation, Inc.
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# Copyright (C) 1999-2018 Free Software Foundation, Inc.
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# Copyright (C) 2001-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
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# Check to make sure that the build environment is sane.    -*- Autoconf -*-

# Copyright (C) 1996-2018 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# Copyright (C) 2009-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
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# AM_SILENT_RULES([DEFAULT])
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AM_BACKSLASH='\'
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# Copyright (C) 2001-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
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# AM_PROG_INSTALL_STRIP
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# One issue with vendor 'install' (even GNU) is that you can't
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AC_SUBST([INSTALL_STRIP_PROGRAM])])

# Copyright (C) 2006-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
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# _AM_SUBST_NOTMAKE(VARIABLE)
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# Check how to create a tarball.                            -*- Autoconf -*-

# Copyright (C) 2004-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
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    fi
  done
  rm -rf conftest.dir

  AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
  AC_MSG_RESULT([$am_cv_prog_tar_$1])])

AC_SUBST([am__tar])
AC_SUBST([am__untar])
]) # _AM_PROG_TAR

m4_include([m4/libtool.m4])
m4_include([m4/ltoptions.m4])
m4_include([m4/ltsugar.m4])
m4_include([m4/ltversion.m4])
m4_include([m4/lt~obsolete.m4])
m4_include([acinclude.m4])