Fix Mono not being found on the PATH on recent macOS versions.

build/Compile.sh

@@ -9,13 +9,21 @@ elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
 	PREMAKE=$CUR_DIR/premake5-linux-64;
 fi
 
-MONO_VERSION_OUTPUT="$(mono --version)"
+MONO=mono
+if [ "$(uname)" == "Darwin" ]; then
+  MONO_PATH=/Library/Frameworks/Mono.framework/Versions/Current/bin/
+  MONO="$MONO_PATH$MONO"
+fi
+
+MONO_VERSION_OUTPUT="$($MONO --version)"
 if [[ $MONO_VERSION_OUTPUT == *"amd64"* ]]; then
 	BUILD_CONF=release_x64;
 else
 	BUILD_CONF=release_x86;
 fi
 
+export PATH=$PATH:$MONO_PATH
+
 $PREMAKE --file=$CUR_DIR/premake5.lua gmake "$@"
 config=$BUILD_CONF make -C $CUR_DIR/gmake/
 

build/Helpers.lua

@@ -27,8 +27,22 @@ newoption {
 
 explicit_target_architecture = _OPTIONS["arch"]
 
+function get_mono_path()
+  local mono = "mono"
+  local result, errorcode = os.outputof(mono .. " --version")
+  if result == nil and os.ishost("macosx") then
+    mono = "/Library/Frameworks/Mono.framework/Versions/Current/bin/" .. mono
+    result, errorcode = os.outputof(mono .. " --version")
+  end
+  if result == nil then
+    print("Could not find Mono executable, please make sure it is in PATH.")
+    os.exit(1)
+  end
+  return mono
+end
+
 function is_64_bits_mono_runtime()
-  result, errorcode = os.outputof("mono --version")
+  local result, errorcode = os.outputof(get_mono_path() .. " --version")
   local arch = string.match(result, "Architecture:%s*([%w]+)")
   return arch == "amd64"
 end

src/CppParser/Bindings/CSharp/premake5.lua

@@ -16,9 +16,7 @@ project "CppSharp.Parser.CSharp"
   if os.istarget("windows") then
       files { "i686-pc-win32-msvc/**.cs" }
   elseif os.istarget("macosx") then
-      local file = io.popen("lipo -info `which mono`")
-      local output = file:read('*all')
-      if string.find(output, "x86_64") or _OPTIONS["arch"] == "x64" then  
+      if is_64_bits_mono_runtime() or _OPTIONS["arch"] == "x64" then  
         files { "x86_64-apple-darwin12.4.0/**.cs" }
       else
         files { "i686-apple-darwin12.4.0/**.cs" }

src/CppParser/premake5.lua

@@ -53,14 +53,11 @@ project "Std-symbols"
   if os.istarget("windows") then
       files { "Bindings/CSharp/i686-pc-win32-msvc/Std-symbols.cpp" }
   elseif os.istarget("macosx") then
-      local file = io.popen("lipo -info `which mono`")
-      local output = file:read('*all')
-      if string.find(output, "x86_64") then
+      if is_64_bits_mono_runtime() or _OPTIONS["arch"] == "x64" then
         files { "Bindings/CSharp/x86_64-apple-darwin12.4.0/Std-symbols.cpp" }
       else
         files { "Bindings/CSharp/i686-apple-darwin12.4.0/Std-symbols.cpp" }
       end
-
   elseif os.istarget("linux") then
       local abi = ""
       if UseCxx11ABI() then