nobu	2017-07-31 13:04:10 +0900 (Mon, 31 Jul 2017)

  New Revision: 59454

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=59454

  Log:
    configure.in: use libtool
    
    * configure.in: use libtool on macOS to suppress a warning against
      debug_counter.o, which has no symbols unless USE_DEBUG_COUNTER
      is set to non-zero.

  Modified files:
    trunk/Makefile.in
    trunk/configure.in
Index: configure.in
===================================================================
--- configure.in	(revision 59453)
+++ configure.in	(revision 59454)
@@ -581,17 +581,21 @@ AS_CASE(["$target_cpu-$target_os"], [[i[ https://github.com/ruby/ruby/blob/trunk/configure.in#L581
 		 CFLAGS="$save_CFLAGS"
 	 ])])
 
+AS_CASE(["$target_os"], [darwin*], [
+  ac_cv_prog_ac_ct_RANLIB=:
+  ac_cv_prog_ac_ct_AR='libtool -static'
+  rb_cv_arflags='-no_warning_for_no_symbols -o'
+])
 AC_CHECK_TOOL(RANLIB, ranlib, :)
 AC_CHECK_TOOL(AR, ar)
 AS_IF([test -z "$AR"], [
   AC_CHECK_PROGS(AR, aal, ar)
 ])
-AC_CACHE_CHECK([for $AR D option], [rb_cv_ar_D_option], [
+AC_CACHE_CHECK([for $AR flags], [rb_cv_arflags], [
     AS_IF([$AR rcD conftest.a > /dev/null 2>&1 && rm conftest.a],
-	[rb_cv_ar_D_option=yes], [rb_cv_ar_D_option=no])
+	[rb_cv_arflags=rcD], [rb_cv_arflags=rcu])
 ])
-AS_IF([test "$rb_cv_ar_D_option" = yes], [ARFLAGS='rcD '], [ARFLAGS='rcu '])
-AC_SUBST(ARFLAGS)
+AC_SUBST(ARFLAGS, ["$rb_cv_arflags "])
 
 AC_CHECK_TOOL(AS, as)
 ASFLAGS=$ASFLAGS
Index: Makefile.in
===================================================================
--- Makefile.in	(revision 59453)
+++ Makefile.in	(revision 59454)
@@ -166,7 +166,7 @@ RMDIRS        = @RMDIRS@ https://github.com/ruby/ruby/blob/trunk/Makefile.in#L166
 RMALL         = @RMALL@
 NM            = @NM@
 AR            = @AR@
-ARFLAGS       = @ARFLAGS@
+ARFLAGS       = @ARFLAGS@$(empty)
 RANLIB        = @RANLIB@
 AS            = @AS@
 ASFLAGS       = @ASFLAGS@ $(INCFLAGS)

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