configure.in: no PIE on Haiku

* configure.in: Don't use PIE on Haiku because loader support is not
  enough.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36957 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Thu Sep 13 10:22:11 2012  Takashi Toyoshima  <toyoshim@gmail.com>
+
+	* configure.in: Don't use PIE on Haiku because loader support is not
+	  enough.
+
 Thu Sep 13 08:20:00 2012  Zachary Scott  <zzak@ruby-lang.org>
 
 	* lib/shellwords.rb: Documentation for Shellwords.

configure.in

@@ -2676,7 +2676,13 @@ AS_CASE("$enable_shared", [yes], [
   LIBRUBYARG_SHARED=
 
   # enable PIE if possible
-  if test "$GCC" = yes -a -z "$EXTSTATIC"; then
+  pie=
+  AS_CASE(["$target_os"],
+  [haiku], [
+    # gcc supports PIE, but doesn't work correctly in Haiku
+    pie=no
+  ])
+  if test "$GCC" = yes -a -z "$EXTSTATIC" -a "x$pie" != xno; then
     RUBY_TRY_CFLAGS(-fPIE, [pie=yes], [pie=no])
     if test "$pie" = yes; then
       RUBY_APPEND_OPTION(XCFLAGS, -fPIE)