Add CMake files for 32-bit OS/2 using OpenWatcom.

setter/toolchains/ow-os2.cmake

@@ -0,0 +1,46 @@
+if(NOT ${CMAKE_HOST_SYSTEM_NAME} MATCHES "Linux|Windows")
+    message(FATAL_ERROR "Unsupported system")
+endif()
+
+if(NOT ${CMAKE_HOST_SYSTEM_PROCESSOR} MATCHES "x86_64|i386")
+    message(FATAL_ERROR "Unsupported architecture")
+endif()
+
+if("$ENV{WATCOM}" STREQUAL "")
+    if(${CMAKE_HOST_SYSTEM_NAME} MATCHES "Linux")
+        set(ENV{WATCOM} "/opt/watcom")
+    else()
+        set(ENV{WATCOM} "C:\\WATCOM")
+    endif()
+endif()
+
+if(${CMAKE_HOST_SYSTEM_NAME} MATCHES "Linux")
+    if(${CMAKE_HOST_SYSTEM_PROCESSOR} MATCHES "x86_64")
+        set(WATCOM_BIN_PATH "$ENV{WATCOM}/binl64/")
+        set(ENV{PATH} "$ENV{WATCOM}/binl64:$ENV{WATCOM}/binl:$ENV{PATH}")
+    else()
+        set(WATCOM_BIN_PATH "$ENV{WATCOM}/binl/")
+        set(ENV{PATH} "$ENV{WATCOM}/binl:$ENV{PATH}")
+    endif()
+
+    set(ENV{EDPATH} "$ENV{WATCOM}/eddat")
+    set(ENV{WIPFC} "$ENV{WATCOM}/wipfc")
+else()
+    if(${CMAKE_HOST_SYSTEM_PROCESSOR} MATCHES "x86_64")
+        set(WATCOM_BIN_PATH "$ENV{WATCOM}\\binnt64\\")
+        set(ENV{PATH} "$ENV{WATCOM}\\binnt64;$ENV{WATCOM}/binnt;$ENV{PATH}")
+    else()
+        set(ENV{PATH} "$ENV{WATCOM}\\binnt;$ENV{PATH}")
+        set(WATCOM_BIN_PATH "$ENV{WATCOM}\\binnt\\")
+    endif()
+
+    set(ENV{EDPATH} "$ENV{WATCOM}\\eddat")
+    set(ENV{WIPFC} "$ENV{WATCOM}\\wipfc")
+endif()
+
+add_compile_options(-3r)
+add_compile_options(-mf)
+add_compile_options(-l=os2v2)
+set(CMAKE_SYSTEM_NAME OS2)
+set(CMAKE_SYSTEM_PROCESSOR i386)
+set(CMAKE_C_COMPILER "${WATCOM_BIN_PATH}wcl386")