Cannot build rbx-2.5.2 on ArchLinux (#3858)

Fixes #3497. Uses #3851

CHANGELOG.md

@@ -15,6 +15,7 @@
 * RVM incorrectly tries to install llvm 3.5 when trying to install Rubinius 3 [\#3848](https://github.com/rvm/rvm/pull/3848)
 * Failing openssl.patch for Ruby 1.9.3 [\#3831](https://github.com/rvm/rvm/issues/3831) 
 * RVM hardcodes number of compile threads [\#3856](https://github.com/rvm/rvm/pull/3856)
+* Cannot build rbx-2.5.2 on ArchLinux [\#3497](https://github.com/rvm/rvm/issues/3497)
 
 ## [1.28.0](https://github.com/rvm/rvm/tag/1.28.0)
 

scripts/functions/requirements/arch

@@ -19,6 +19,11 @@ requirements_arch_libs_install()
   __rvm_try_sudo pacman -Sy --needed --noconfirm "$@" || return $?
 }
 
+requirements_arch_libs_remove()
+{
+  __rvm_try_sudo pacman -Rs --noconfirm "$@" || return $?
+}
+
 requirements_arch_update_system()
 {
   # Has to be ran separately so new version can be used for installing missing libs
@@ -64,12 +69,19 @@ requirements_arch_define()
       requirements_check nodejs
       ;;
     (rbx*head|rubinius*head)
+      undesired_check clang35 llvm35 llvm35-libs
       requirements_check clang llvm llvm-libs patch curl zlib readline autoconf automake diffutils make libtool bison git
       ;;
     (rbx-3*|rubinius-3*)
+      undesired_check clang35 llvm35 llvm35-libs
       requirements_check clang llvm llvm-libs patch curl zlib readline autoconf automake diffutils make libtool bison
       ;;
     (rbx-2*|rubinius-2*)
+      undesired_check clang llvm llvm-libs
+      requirements_check clang35 llvm35 llvm35-libs patch curl zlib readline autoconf automake diffutils make libtool bison
+      ;;
+    (rbx-1*|rubinius-1*)
+      undesired_check clang llvm llvm-libs
       requirements_check clang35 llvm35 llvm35-libs patch curl zlib readline autoconf automake diffutils make libtool bison
       ;;
     (*-head)