diff --git a/build.sh b/build.sh
index 5f85aa35a7..d8efb61fd9 100755
--- a/build.sh
+++ b/build.sh
@@ -20,12 +20,13 @@ flags=(-DCMAKE_BUILD_PO=FALSE)
 
 cleanBuild=0
 useClang=0
-Build64=0
+# 0 => no, 1 => yes, 2 => force yes
+useCross=2
 
 for ARG in "$@"; do
     case "$ARG" in
         --clean       ) cleanBuild=1 ;;
-        --clang       ) flags+=(-DUSE_CLANG=TRUE); useClang=1; ;;
+        --clang       ) useClang=1; ;;
         --dev|--devel ) flags+=(-DCMAKE_BUILD_TYPE=Devel) ;;
         --dbg|--debug ) flags+=(-DCMAKE_BUILD_TYPE=Debug) ;;
         --strip       ) flags+=(-DCMAKE_BUILD_STRIP=TRUE) ;;
@@ -39,7 +40,7 @@ for ARG in "$@"; do
         --wx28        ) flags+=(-DWX28_API=TRUE) ;;
         --gtk3        ) flags+=(-DGTK3_API=TRUE) ;;
         --no-simd     ) flags+=(-DDISABLE_ADVANCE_SIMD=TRUE) ;;
-        --cross-multilib ) flags+=(-DCMAKE_TOOLCHAIN_FILE=cmake/linux-compiler-i386-multilib.cmake) ;;
+        --cross-multilib ) flags+=(-DCMAKE_TOOLCHAIN_FILE=cmake/linux-compiler-i386-multilib.cmake); useCross=1; ;;
         -D*           ) flags+=($ARG) ;;
 
         *)
@@ -70,10 +71,6 @@ for ARG in "$@"; do
     esac
 done
 
-if [[ (-f /usr/bin/wx-config32-2.8 && -f /usr/bin/wxrc32-2.8) && "$Build64" -eq 0 ]]; then
-#add flags for archlinux, wx 3 is not yet in main repositories, wx2.8 need to be used for now
-flags+=(-DwxWidgets_CONFIG_EXECUTABLE='/usr/bin/wx-config32-2.8' -DwxWidgets_wxrc_EXECUTABLE='/usr/bin/wxrc32-2.8' -DWX28_API=TRUE)
-fi
 root=$PWD/$(dirname "$0")
 log=$root/install_log.txt
 build=$root/build
@@ -84,6 +81,13 @@ if [[ "$cleanBuild" -eq 1 ]]; then
     rm -fr $build/*
 fi
 
+if [[ "$useCross" -eq 2 ]] && [[ "$(getconf LONG_BIT 2> /dev/null)" != 32 ]]; then
+    echo "Forcing cross compilation."
+    flags+=(-DCMAKE_TOOLCHAIN_FILE=cmake/linux-compiler-i386-multilib.cmake)
+elif [[ "$useCross" -ne 1 ]]; then
+    useCross=0
+fi
+
 echo "Building pcsx2 with ${flags[*]}" | tee $log
 
 # Resolve the symlink otherwise cmake is lost
@@ -97,7 +101,11 @@ mkdir -p $build
 cd $build
 
 if [[ "$useClang" -eq 1 ]]; then
-    CC=clang CXX=clang++ cmake "${flags[@]}" $root 2>&1 | tee -a $log
+    if [[ "$useCross" -eq 0 ]]; then
+        CC=clang CXX=clang++ cmake "${flags[@]}" $root 2>&1 | tee -a $log
+    else
+        CC="clang -m32" CXX="clang++ -m32" cmake "${flags[@]}" $root 2>&1 | tee -a $log
+    fi
 else
     cmake "${flags[@]}" $root 2>&1 | tee -a $log
 fi
diff --git a/cmake/BuildParameters.cmake b/cmake/BuildParameters.cmake
index 82d52401d8..35781cd053 100644
--- a/cmake/BuildParameters.cmake
+++ b/cmake/BuildParameters.cmake
@@ -60,12 +60,11 @@ endif()
 #-------------------------------------------------------------------------------
 # Compiler extra
 #-------------------------------------------------------------------------------
-option(USE_CLANG "Use llvm/clang to build PCSX2 (developer option)")
 option(USE_ASAN "Enable address sanitizer")
 
-# It's probably better to autodetect the USE_CLANG. Remove the option?
-if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND NOT USE_CLANG)
+if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
     set(USE_CLANG TRUE)
+    message(STATUS "Building with Clang/LLVM.")
 endif()
 
 #-------------------------------------------------------------------------------
diff --git a/cmake/SearchForStuff.cmake b/cmake/SearchForStuff.cmake
index 07feef4efd..13be61f4dd 100644
--- a/cmake/SearchForStuff.cmake
+++ b/cmake/SearchForStuff.cmake
@@ -22,6 +22,32 @@ if(Fedora AND CMAKE_CROSSCOMPILING)
 else()
     set(wxWidgets_CONFIG_OPTIONS --unicode=yes)
 endif()
+
+# Temprorary help for Arch-based distros.
+# They have wx2.8, lib32-wx2.8 and wx3.0 but no lib32-wx3.0.
+# wx2.8 => /usr/bin/wx-config-2.8, /usr/bin/wxrc-2.8
+# lib32-wx2.8 => /usr/bin/wx-config32-2.8, /usr/bin/wxrc32-2.8
+# wx3.0 => /usr/bin/wx-config, /usr/bin/wxrc -> /usr/bin/wxrc-3.0
+# I'm going to take a wild guess and predict this:
+# lib32-wx3.0 => /usr/bin/wx-config32-3.0, /usr/bin/wxrc32-3.0
+# FindwxWidgets only searches for wxrc and wx-config. Therefore only native
+# wx3.0 works since everything else has non-standard naming.
+if(CMAKE_CROSSCOMPILING)
+    # May need to fix the filenames for lib32-wx3.0.
+    if(NOT WX28_API AND ${PCSX2_TARGET_ARCHITECTURES} MATCHES "i386" AND EXISTS "/usr/bin/wx-config32-3.0" AND EXISTS "/usr/bin/wxrc32-3.0")
+        set(wxWidgets_CONFIG_EXECUTABLE "/usr/bin/wx-config32-3.0")
+        set(wxWidgets_wxrc_EXECUTABLE "/usr/bin/wxrc32-3.0")
+    elseif(WX28_API AND ${PCSX2_TARGET_ARCHITECTURES} MATCHES "i386" AND EXISTS "/usr/bin/wx-config32-2.8" AND EXISTS "/usr/bin/wxrc32-2.8")
+        set(wxWidgets_CONFIG_EXECUTABLE "/usr/bin/wx-config32-2.8")
+        set(wxWidgets_wxrc_EXECUTABLE "/usr/bin/wxrc32-2.8")
+    endif()
+else()
+    if(WX28_API AND EXISTS "/usr/bin/wx-config-2.8" AND EXISTS "/usr/bin/wxrc-2.8")
+        set(wxWidgets_CONFIG_EXECUTABLE "/usr/bin/wx-config-2.8")
+        set(wxWidgets_wxrc_EXECUTABLE "/usr/bin/wxrc-2.8")
+    endif()
+endif()
+
 find_package(wxWidgets COMPONENTS base core adv)
 find_package(ZLIB)
 
diff --git a/cmake/darwin-compiler-i386-clang.cmake b/cmake/darwin-compiler-i386-clang.cmake
index 182a6d4a91..b968afeca8 100644
--- a/cmake/darwin-compiler-i386-clang.cmake
+++ b/cmake/darwin-compiler-i386-clang.cmake
@@ -8,9 +8,6 @@ set(CMAKE_C_COMPILER_TARGET i686-apple-darwin)
 set(CMAKE_CXX_COMPILER clang++ -m32)
 set(CMAKE_CXX_COMPILER_TARGET i686-apple-darwin)
 
-# Enable clang
-set(USE_CLANG TRUE)
-
 # If given a CMAKE_FIND_ROOT_PATH then
 # FIND_PROGRAM ignores CMAKE_FIND_ROOT_PATH (probably can't run)
 # FIND_{LIBRARY,INCLUDE,PACKAGE} only uses the files in CMAKE_FIND_ROOT_PATH.
diff --git a/cmake/darwin-compiler-i386-generic.cmake b/cmake/darwin-compiler-i386-generic.cmake
index b2ac14e6a3..e61a1a54cd 100644
--- a/cmake/darwin-compiler-i386-generic.cmake
+++ b/cmake/darwin-compiler-i386-generic.cmake
@@ -3,8 +3,10 @@ set(CMAKE_SYSTEM_NAME Darwin)
 set(CMAKE_SYSTEM_PROCESSOR i686)
 
 # Leave it generic since it could be clang, gnu, etc.
-set(CMAKE_C_COMPILER cc -m32)
-set(CMAKE_CXX_COMPILER c++ -m32)
+if("$ENV{CC}" STREQUAL "" OR "$ENV{CXX}" STREQUAL "")
+    set(CMAKE_C_COMPILER cc -m32)
+    set(CMAKE_CXX_COMPILER c++ -m32)
+endif()
 
 # If given a CMAKE_FIND_ROOT_PATH then
 # FIND_PROGRAM ignores CMAKE_FIND_ROOT_PATH (probably can't run)
diff --git a/cmake/linux-compiler-i386-multilib.cmake b/cmake/linux-compiler-i386-multilib.cmake
index 770f38b483..e3cebcc094 100644
--- a/cmake/linux-compiler-i386-multilib.cmake
+++ b/cmake/linux-compiler-i386-multilib.cmake
@@ -4,8 +4,10 @@ set(CMAKE_SYSTEM_PROCESSOR i686)
 
 # It could be i?86-*linux-gnu, x86_64-*linux-gnu, x86_64-*linux-gnux32, etc.
 # Leave it generic to only support amd64 or x32 to i386 with any compiler.
-set(CMAKE_C_COMPILER cc -m32)
-set(CMAKE_CXX_COMPILER c++ -m32)
+if("$ENV{CC}" STREQUAL "" OR "$ENV{CXX}" STREQUAL "")
+    set(CMAKE_C_COMPILER cc -m32)
+    set(CMAKE_CXX_COMPILER c++ -m32)
+endif()
 
 # cmake 2.8.5 correctly sets CMAKE_LIBRARY_ARCHITECTURE for Debian multiarch.
 # Be really strict about what gets used.