## -*- Autoconf -*- # Copyright (C) 2011-2013 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], [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 ]) ]) 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 ])