Add: introduce CMake for project management

CMake works on all our supported platforms, like MSVC, Mingw, GCC,
Clang, and many more. It allows for a single way of doing things,
so no longer we need shell scripts and vbs scripts to work on all
our supported platforms.

Additionally, CMake allows to generate project files for like MSVC,
KDevelop, etc.

This heavily reduces the lines of code we need to support multiple
platforms from a project perspective.

Addtiionally, this heavily improves our detection of libraries, etc.

src/os/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_subdirectory(macosx)
+add_subdirectory(os2)
+add_subdirectory(unix)
+add_subdirectory(windows)

src/os/macosx/CMakeLists.txt

@@ -0,0 +1,11 @@
+add_files(
+    crashlog_osx.cpp
+    macos.h
+    macos.mm
+    osx_stdafx.h
+    splash.cpp
+    splash.h
+    string_osx.cpp
+    string_osx.h
+    CONDITION APPLE
+)

src/os/os2/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_files(
+    os2.cpp
+    CONDITION OPTION_OS2
+)

src/os/unix/CMakeLists.txt

@@ -0,0 +1,9 @@
+add_files(
+    crashlog_unix.cpp
+    CONDITION UNIX AND NOT APPLE AND NOT OPTION_OS2
+)
+
+add_files(
+    unix.cpp
+    CONDITION UNIX AND NOT OPTION_OS2
+)

src/os/windows/CMakeLists.txt

@@ -0,0 +1,8 @@
+add_files(
+    crashlog_win.cpp
+    string_uniscribe.cpp
+    string_uniscribe.h
+    win32.cpp
+    win32.h
+    CONDITION WIN32
+)

src/os/windows/ottdres.rc.in

@@ -37,7 +37,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_DEFAULT
 
 // Icon with lowest ID value placed first to ensure application icon
 // remains consistent on all systems.
-100                     ICON    DISCARDABLE     "../../../media/openttd.ico"
+100                     ICON    DISCARDABLE     "${CMAKE_SOURCE_DIR}/os/windows/openttd.ico"
 
 /////////////////////////////////////////////////////////////////////////////
 //
@@ -77,8 +77,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 1,11,0,!!ISODATE!!
- PRODUCTVERSION 1,11,0,!!ISODATE!!
+ FILEVERSION 1,11,0,${REV_ISODATE}
+ PRODUCTVERSION 1,11,0,${REV_ISODATE}
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -96,14 +96,14 @@ BEGIN
             VALUE "Comments", "This program is licensed under the GNU General Public License version 2.\0"
             VALUE "CompanyName", "OpenTTD Development Team\0"
             VALUE "FileDescription", "OpenTTD\0"
-            VALUE "FileVersion", "!!VERSION!!\0"
+            VALUE "FileVersion", "${REV_VERSION}\0"
             VALUE "InternalName", "openttd\0"
-            VALUE "LegalCopyright", "Copyright \xA9 OpenTTD Developers 2002-!!YEAR!!. All Rights Reserved.\0"
+            VALUE "LegalCopyright", "Copyright \xA9 OpenTTD Developers 2002-${REV_YEAR}. All Rights Reserved.\0"
             VALUE "LegalTrademarks", "\0"
             VALUE "OriginalFilename", "openttd.exe\0"
             VALUE "PrivateBuild", "\0"
             VALUE "ProductName", "OpenTTD\0"
-            VALUE "ProductVersion", "!!VERSION!!\0"
+            VALUE "ProductVersion", "${REV_VERSION}\0"
             VALUE "SpecialBuild", "-\0"
         END
     END
@@ -116,7 +116,7 @@ END
 #endif    // !_MAC
 
 #ifdef __MINGW32__
-1 24 "..\\..\\..\\projects\\dpi_aware.manifest"
+1 24 "${CMAKE_SOURCE_DIR}/os/windows/openttd.manifest"
 #endif
 
 #endif    // Neutral (Default) resources