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- ## -*- Autoconf -*-
- # Copyright (C) 2011-2017 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_PROG_AR([ACT-IF-FAIL])
- # -------------------------
- # Try to determine the archiver interface, and trigger the ar-lib wrapper
- # if it is needed. If the detection of archiver interface fails, run
- # ACT-IF-FAIL (default is to abort configure with a proper error message).
- AC_DEFUN([AM_PROG_AR],
- [AC_BEFORE([$0], [LT_INIT])dnl
- AC_BEFORE([$0], [AC_PROG_LIBTOOL])dnl
- AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
- AC_REQUIRE_AUX_FILE([ar-lib])dnl
- AC_CHECK_TOOLS([AR], [ar lib "link -lib"], [false])
- : ${AR=ar}
- AC_CACHE_CHECK([the archiver ($AR) interface], [am_cv_ar_interface],
- [AC_LANG_PUSH([C])
- am_cv_ar_interface=ar
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int some_variable = 0;]])],
- [am_ar_try='$AR cru libconftest.a conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
- AC_TRY_EVAL([am_ar_try])
- if test "$ac_status" -eq 0; then
- am_cv_ar_interface=ar
- else
- am_ar_try='$AR -NOLOGO -OUT:conftest.lib conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
- AC_TRY_EVAL([am_ar_try])
- if test "$ac_status" -eq 0; then
- am_cv_ar_interface=lib
- else
- am_cv_ar_interface=unknown
- fi
- fi
- rm -f conftest.lib libconftest.a
- ])
- AC_LANG_POP([C])])
- case $am_cv_ar_interface in
- ar)
- ;;
- lib)
- # Microsoft lib, so override with the ar-lib wrapper script.
- # FIXME: It is wrong to rewrite AR.
- # But if we don't then we get into trouble of one sort or another.
- # A longer-term fix would be to have automake use am__AR in this case,
- # and then we could set am__AR="$am_aux_dir/ar-lib \$(AR)" or something
- # similar.
- AR="$am_aux_dir/ar-lib $AR"
- ;;
- unknown)
- m4_default([$1],
- [AC_MSG_ERROR([could not determine $AR interface])])
- ;;
- esac
- AC_SUBST([AR])dnl
- ])
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