configure.in: insert a space for non-GCC

* configure.in (DLDFLAGS): insert a space between option and its
  argument for non-GCC compilers.  [ruby-core:61429] [Bug #9624]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45348 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sun Mar 16 13:21:40 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (DLDFLAGS): insert a space between option and its
+	  argument for non-GCC compilers.  [ruby-core:61429] [Bug #9624]
+
 Sun Mar 16 08:05:06 2014  Eric Wong  <e@80x24.org>
 
 	* gc.c (objspace_xcalloc): fix GC accounting

configure.in

@@ -2772,9 +2772,10 @@ if test "$with_dln_a_out" != yes; then
     AS_CASE(["$target_os"],
       [darwin*], [
 	for flag in \
-	  "${linker_flag}-undefined${linker_flag:+,}dynamic_lookup" \
-	  "${linker_flag}-multiply_defined${linker_flag:+,}suppress" \
+	  "-undefined dynamic_lookup" \
+	  "-multiply_defined suppress" \
 	  ; do
+	  test "x${linker_flag}" = x || flag="${linker_flag}${flag// /,}"
 	  RUBY_TRY_LDFLAGS([$flag], [], [flag=])
 	  if test "x$flag" != x; then
 	    RUBY_APPEND_OPTIONS(DLDFLAGS, [$flag])