From e24d97c938c481450ed80ec83e5399595946c1ae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADt=20Ondruch?= <vondruch@redhat.com>
Date: Fri, 8 Feb 2013 22:48:41 +0100
Subject: [PATCH] Prevent duplicated paths when empty version string is
 configured.

---
 configure.in     | 15 +++++++++------
 loadpath.c       | 12 ++++++++++++
 tool/mkconfig.rb |  2 +-
 3 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/configure.in b/configure.in
index 17ed3ed..5843651 100644
--- a/configure.in
+++ b/configure.in
@@ -3966,8 +3966,6 @@ AS_CASE(["$target_os"],
     rubyw_install_name='$(RUBYW_INSTALL_NAME)'
     ])
 
-rubylibdir='${rubylibprefix}/${ruby_version}'
-rubyarchdir=${multiarch+'${rubyarchprefix}/${ruby_version}'}${multiarch-'${rubylibdir}/${arch}'}
 
 rubyarchprefix=${multiarch+'${archlibdir}/${RUBY_BASE_NAME}'}${multiarch-'${rubylibprefix}/${arch}'}
 AC_ARG_WITH(rubyarchprefix,
@@ -3997,6 +3995,7 @@ AC_ARG_WITH(ruby-version,
             [ruby_version=full])
 unset RUBY_LIB_VERSION
 unset RUBY_LIB_VERSION_STYLE
+ruby_version_suffix=/'${ruby_version}'
 AS_CASE(["$ruby_version"],
   [full],  [RUBY_LIB_VERSION_STYLE='3	/* full */'],
   [minor], [RUBY_LIB_VERSION_STYLE='2	/* minor */'])
@@ -4013,30 +4012,34 @@ if test ${RUBY_LIB_VERSION_STYLE+set}; then
     ruby_version="`$CPP -I. -I"${srcdir}" -I"${srcdir}/include" conftest.c | sed '/^ruby_version=/!d;s/ //g'`"
     eval $ruby_version
 elif test -z "${ruby_version}"; then
-    AC_MSG_ERROR([No ruby version, No place for bundled libraries])
+    unset ruby_version_suffix
+    AC_DEFINE(RUBY_LIB_VERSION_BLANK, 1)
 else
     RUBY_LIB_VERSION="${ruby_version}"
 fi
 AC_SUBST(RUBY_LIB_VERSION_STYLE)
 AC_SUBST(RUBY_LIB_VERSION)
 
+rubylibdir='${rubylibprefix}'${ruby_version_suffix}
+rubyarchdir=${multiarch+'${rubyarchprefix}'${ruby_version_suffix}}${multiarch-'${rubylibdir}/${arch}'}
+
 AC_ARG_WITH(sitedir,
 	    AS_HELP_STRING([--with-sitedir=DIR], [site libraries in DIR [[RUBY_LIB_PREFIX/site_ruby]], "no" to disable site directory]),
             [sitedir=$withval],
             [sitedir='${rubylibprefix}/site_ruby'])
-sitelibdir='${sitedir}/${ruby_version}'
+sitelibdir='${sitedir}'${ruby_version_suffix}
 
 AC_ARG_WITH(sitearchdir,
 	    AS_HELP_STRING([--with-sitearchdir=DIR],
 			   [architecture dependent site libraries in DIR [[SITEDIR/SITEARCH]], "no" to disable site directory]),
             [sitearchdir=$withval],
-            [sitearchdir=${multiarch+'${rubysitearchprefix}/site_ruby/${ruby_version}'}${multiarch-'${sitelibdir}/${sitearch}'}])
+            [sitearchdir=${multiarch+'${rubysitearchprefix}/site_ruby'${ruby_version_suffix}}${multiarch-'${sitelibdir}/${sitearch}'}])
 
 AC_ARG_WITH(vendordir,
 	    AS_HELP_STRING([--with-vendordir=DIR], [vendor libraries in DIR [[RUBY_LIB_PREFIX/vendor_ruby]], "no" to disable vendor directory]),
             [vendordir=$withval],
             [vendordir='${rubylibprefix}/vendor_ruby'])
-vendorlibdir='${vendordir}/${ruby_version}'
+vendorlibdir='${vendordir}'${ruby_version_suffix}
 
 AC_ARG_WITH(vendorarchdir,
 	    AS_HELP_STRING([--with-vendorarchdir=DIR],
diff --git a/loadpath.c b/loadpath.c
index 9160031..0d4d953 100644
--- a/loadpath.c
+++ b/loadpath.c
@@ -65,22 +65,34 @@ const char ruby_initial_load_paths[] =
     RUBY_SEARCH_PATH "\0"
 #endif
 #ifndef NO_RUBY_SITE_LIB
+#ifdef RUBY_LIB_VERSION_BLANK
+    RUBY_SITE_LIB "\0"
+#else
     RUBY_SITE_LIB2 "\0"
+#endif
 #ifdef RUBY_THINARCH
     RUBY_SITE_ARCH_LIB_FOR(RUBY_THINARCH) "\0"
 #endif
     RUBY_SITE_ARCH_LIB_FOR(RUBY_SITEARCH) "\0"
+#ifndef RUBY_LIB_VERSION_BLANK
     RUBY_SITE_LIB "\0"
 #endif
+#endif
 
 #ifndef NO_RUBY_VENDOR_LIB
+#ifdef RUBY_LIB_VERSION_BLANK
+    RUBY_VENDOR_LIB "\0"
+#else
     RUBY_VENDOR_LIB2 "\0"
+#endif
 #ifdef RUBY_THINARCH
     RUBY_VENDOR_ARCH_LIB_FOR(RUBY_THINARCH) "\0"
 #endif
     RUBY_VENDOR_ARCH_LIB_FOR(RUBY_SITEARCH) "\0"
+#ifndef RUBY_LIB_VERSION_BLANK
     RUBY_VENDOR_LIB "\0"
 #endif
+#endif
 
     RUBY_LIB "\0"
 #ifdef RUBY_THINARCH
diff --git a/tool/mkconfig.rb b/tool/mkconfig.rb
index 07076d4..35e6c3c 100755
--- a/tool/mkconfig.rb
+++ b/tool/mkconfig.rb
@@ -123,7 +123,7 @@ File.foreach "config.status" do |line|
     val = val.gsub(/\$(?:\$|\{?(\w+)\}?)/) {$1 ? "$(#{$1})" : $&}.dump
     case name
     when /^prefix$/
-      val = "(TOPDIR || DESTDIR + #{val})"
+      val = "(((TOPDIR && TOPDIR.empty?) ? nil : TOPDIR) || DESTDIR + #{val})"
     when /^ARCH_FLAG$/
       val = "arch_flag || #{val}" if universal
     when /^UNIVERSAL_ARCHNAMES$/
-- 
1.9.0