From d26eea220ac0da56f70b9bc2591131fa32d4b399 Mon Sep 17 00:00:00 2001
From: Jiri Malak <malak.jiri@gmail.com>
Date: Fri, 1 May 2020 16:06:25 +0200
Subject: OpenWatcom: Add OS/2 target support

OS/2 16-bit and 32-bit target support files for cross-compilation by
OpenWatcom.

It is used if CMAKE_SYSTEM_NAME=OS2 is defined.

If CMAKE_SYSTEM_PROCESSOR=I86 is defined then 16-bit OS/2 target is
used, otherwise 32-bit OS/2 target is used.
---
 Modules/Platform/OS2-OpenWatcom-C.cmake   |  1 +
 Modules/Platform/OS2-OpenWatcom-CXX.cmake |  1 +
 Modules/Platform/OS2-OpenWatcom.cmake     | 35 +++++++++++++++++++++++++++++++
 Modules/Platform/OS2.cmake                | 14 +++++++++++++
 4 files changed, 51 insertions(+)
 create mode 100644 Modules/Platform/OS2-OpenWatcom-C.cmake
 create mode 100644 Modules/Platform/OS2-OpenWatcom-CXX.cmake
 create mode 100644 Modules/Platform/OS2-OpenWatcom.cmake
 create mode 100644 Modules/Platform/OS2.cmake

diff --git a/Modules/Platform/OS2-OpenWatcom-C.cmake b/Modules/Platform/OS2-OpenWatcom-C.cmake
new file mode 100644
index 0000000..21a4d9e
--- /dev/null
+++ b/Modules/Platform/OS2-OpenWatcom-C.cmake
@@ -0,0 +1 @@
+include(Platform/OS2-OpenWatcom)
diff --git a/Modules/Platform/OS2-OpenWatcom-CXX.cmake b/Modules/Platform/OS2-OpenWatcom-CXX.cmake
new file mode 100644
index 0000000..21a4d9e
--- /dev/null
+++ b/Modules/Platform/OS2-OpenWatcom-CXX.cmake
@@ -0,0 +1 @@
+include(Platform/OS2-OpenWatcom)
diff --git a/Modules/Platform/OS2-OpenWatcom.cmake b/Modules/Platform/OS2-OpenWatcom.cmake
new file mode 100644
index 0000000..998fb9f
--- /dev/null
+++ b/Modules/Platform/OS2-OpenWatcom.cmake
@@ -0,0 +1,35 @@
+# This module is shared by multiple languages; use include blocker.
+include_guard()
+
+set(CMAKE_BUILD_TYPE_INIT Debug)
+
+if(DEFINED CMAKE_SYSTEM_PROCESSOR AND CMAKE_SYSTEM_PROCESSOR STREQUAL "I86")
+  string(APPEND CMAKE_EXE_LINKER_FLAGS_INIT " system os2")
+  string(APPEND CMAKE_SHARED_LINKER_FLAGS_INIT " system os2_dll")
+  string(APPEND CMAKE_MODULE_LINKER_FLAGS_INIT " system os2_dll")
+else()
+  string(APPEND CMAKE_EXE_LINKER_FLAGS_INIT " system os2v2")
+  string(APPEND CMAKE_SHARED_LINKER_FLAGS_INIT " system os2v2_dll")
+  string(APPEND CMAKE_MODULE_LINKER_FLAGS_INIT " system os2v2_dll")
+endif()
+
+set(CMAKE_C_COMPILE_OPTIONS_DLL "-bd") # Note: This variable is a ';' separated list
+set(CMAKE_SHARED_LIBRARY_C_FLAGS "-bd") # ... while this is a space separated string.
+
+string(APPEND CMAKE_C_FLAGS_INIT " -bt=os2")
+string(APPEND CMAKE_CXX_FLAGS_INIT " -bt=os2 -xs")
+
+if(NOT CMAKE_C_STANDARD_INCLUDE_DIRECTORIES)
+  if(DEFINED CMAKE_SYSTEM_PROCESSOR AND CMAKE_SYSTEM_PROCESSOR STREQUAL "I86")
+    set(CMAKE_C_STANDARD_INCLUDE_DIRECTORIES $ENV{WATCOM}/h $ENV{WATCOM}/h/os21x)
+  else()
+    set(CMAKE_C_STANDARD_INCLUDE_DIRECTORIES $ENV{WATCOM}/h $ENV{WATCOM}/h/os2)
+  endif()
+endif()
+if(NOT CMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES)
+  if(DEFINED CMAKE_SYSTEM_PROCESSOR AND CMAKE_SYSTEM_PROCESSOR STREQUAL "I86")
+    set(CMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES $ENV{WATCOM}/h $ENV{WATCOM}/h/os21x)
+  else()
+    set(CMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES $ENV{WATCOM}/h $ENV{WATCOM}/h/os2)
+  endif()
+endif()
diff --git a/Modules/Platform/OS2.cmake b/Modules/Platform/OS2.cmake
new file mode 100644
index 0000000..a9df66d
--- /dev/null
+++ b/Modules/Platform/OS2.cmake
@@ -0,0 +1,14 @@
+set(OS2 1)
+
+set(CMAKE_STATIC_LIBRARY_PREFIX "")
+set(CMAKE_STATIC_LIBRARY_SUFFIX ".lib")
+set(CMAKE_SHARED_LIBRARY_PREFIX "")
+set(CMAKE_SHARED_LIBRARY_SUFFIX ".dll")
+set(CMAKE_IMPORT_LIBRARY_PREFIX "")
+set(CMAKE_IMPORT_LIBRARY_SUFFIX ".lib")
+set(CMAKE_EXECUTABLE_SUFFIX ".exe")
+set(CMAKE_LINK_LIBRARY_SUFFIX ".lib")
+set(CMAKE_DL_LIBS "")
+
+set(CMAKE_FIND_LIBRARY_PREFIXES "")
+set(CMAKE_FIND_LIBRARY_SUFFIXES ".lib")
-- 
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