# Public macros for the TeX Live (TL) tree.
# Copyright (C) 1995 - 2009 Karl Berry <tex-live@tug.org>
# Copyright (C) 2009, 2010 Peter Breitenlohner <tex-live@tug.org>
#
# This file is free software; the copyright holders
# give unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# serial 1

# _KPSE_USE_LIBTOOL()
# Switch link tests over to use libtool so as not to require dependent
# libraries to be listed explicitly.
# Extended for Fortran by Thomas Jahns <jahns@dkrz.de>, 2015
# -------------------
AC_DEFUN([_KPSE_USE_LIBTOOL],
[## $0: Generate a libtool script for use in configure tests
AC_PROVIDE_IFELSE([LT_INIT], ,
                  [m4_fatal([$0: requires libtool])])[]dnl
LT_OUTPUT
m4_append([AC_LANG(C)],
[ac_link="./libtool --mode=link --tag=CC $ac_link"
])[]dnl
AC_PROVIDE_IFELSE([AC_PROG_CXX],
[m4_append([AC_LANG(C++)],
[ac_link="./libtool --mode=link --tag=CXX $ac_link"
])])[]dnl
AC_PROVIDE_IFELSE([AC_PROG_FC],
[m4_append([AC_LANG(Fortran)],
[ac_link="./libtool --mode=link --tag=FC $ac_link"
])])[]dnl
AC_PROVIDE_IFELSE([AC_PROG_F77],
[m4_append([AC_LANG(Fortran 77)],
[ac_link="./libtool --mode=link --tag=F77 $ac_link"
])])[]dnl
AC_LANG(_AC_LANG)[]dnl
]) # _KPSE_USE_LIBTOOL

# _KPSE_CHECK_LIBTOOL([ACTION-IF-SUCCESS], [ACTION-IF-FAILURE = FAILURE])
# Check that we can link programs written in the current language with libtool
# -------------------
AC_DEFUN([_KPSE_CHECK_LIBTOOL],
  [m4_pushdef([acx_cache_var], [acx_cv_libtool_[]_AC_LANG_ABBREV[]_works])dnl
   AC_CACHE_CHECK([whether libtool can link _AC_LANG programs],
     [acx_cache_var],
     [acx_cache_var=no
      AC_LINK_IFELSE([AC_LANG_PROGRAM], [acx_cache_var=yes])])
   AS_VAR_IF([acx_cache_var], [no], [m4_default([$2],
     [AC_MSG_FAILURE([unable to link a _AC_LANG program using libtool])])],
        [$1])
   m4_popdef([acx_cache_var])])