libretro: compilation on Windows

[audetto]

It was mentioned here that the libretro code does not compile on Windows with MSYS2

#44 (comment)

I am allergic to Windows, but in small doses I could do something.
Is there any interest out there?

I could try to make it compile using Visual Studio 2019 (same compiler used by AW).
Any interest?

[gouchi]

I tried to make a quick using msys2 and I got using

git clone https://github.com/audetto/AppleWin.git --recursive
mkdir build
cd build/
cmake -DCMAKE_BUILD_TYPE=RELEASE  -DBUILD_LIBRETRO=ON ..
-- The C compiler identification is GNU 14.1.0
-- The CXX compiler identification is GNU 14.1.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /mingw64/bin/cc.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /mingw64/bin/c++.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMAKE_BUILD_TYPE:                RELEASE
CMAKE_CXX_FLAGS:
CMAKE_CXX_FLAGS_RELEASE:         -O3 -DNDEBUG
CMAKE_CXX_FLAGS_DEBUG:           -g
CMAKE_CXX_FLAGS_RELWITHDEBINFO:  -O2 -g -DNDEBUG
-- Found PkgConfig: /mingw64/bin/pkg-config.exe (found version "2.2.0")
-- Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:233 (message):
  Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
Call Stack (most recent call first):
  /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:603 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake/Modules/FindZLIB.cmake:202 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  source/CMakeLists.txt:4 (find_package)


-- Configuring incomplete, errors occurred!

I installed RA environnement packages even not necessary (I did not install Nvdia and QT packages). Here the list at the end packages.txt.

[audetto]

When you compile this libretro core, you need to install its dependencies, which are not the ones listed there.

I have a list of dependencies for Fedora (https://github.com/audetto/AppleWin/blob/master/source/linux/fedora.list.txt) and Debian (https://github.com/audetto/AppleWin/blob/master/source/linux/raspbian.list.txt).

If you restrict to libretro you might be able to skip some.

[gouchi]

I was missing packages zlib-devel mingw-w64-x86_64-minizip mingw-w64-x86_64-libslirp mingw-w64-x86_64-libyaml mingw-w64-x86_64-boost

CMake is ok now

cmake -DCMAKE_BUILD_TYPE=RELEASE -DBUILD_LIBRETRO=ON ..
-- The C compiler identification is GNU 14.1.0
-- The CXX compiler identification is GNU 14.1.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /mingw64/bin/cc.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /mingw64/bin/c++.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMAKE_BUILD_TYPE:                RELEASE
CMAKE_CXX_FLAGS:
CMAKE_CXX_FLAGS_RELEASE:         -O3 -DNDEBUG
CMAKE_CXX_FLAGS_DEBUG:           -g
CMAKE_CXX_FLAGS_RELWITHDEBINFO:  -O2 -g -DNDEBUG
-- Found PkgConfig: /mingw64/bin/pkg-config.exe (found version "2.2.0")
-- Found ZLIB: /usr/lib/libz.dll.a (found version "1.3.1")
-- Checking for one of the modules 'yaml-0.1'
-- Checking for one of the modules 'minizip'
-- Checking for one of the modules 'slirp'
CMake Warning (dev) at source/CMakeLists.txt:34 (find_package):
  Policy CMP0167 is not set: The FindBoost module is removed.  Run "cmake
  --help-policy CMP0167" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

This warning is for project developers.  Use -Wno-dev to suppress it.

-- Found Boost: /mingw64/lib/cmake/Boost-1.85.0/BoostConfig.cmake (found version "1.85.0")
CMake Warning (dev) at source/frontends/common2/CMakeLists.txt:36 (find_package):
  Policy CMP0167 is not set: The FindBoost module is removed.  Run "cmake
  --help-policy CMP0167" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

This warning is for project developers.  Use -Wno-dev to suppress it.

-- Found Boost: /mingw64/lib/cmake/Boost-1.85.0/BoostConfig.cmake (found version "1.85.0") found components: program_options
-- Configuring done (15.6s)
-- Generating done (0.6s)
-- Build files have been written to: /home/gouchi/AppleWin/build

But now I getting this error :

[  1%] Building CXX object source/linux/libwindows/CMakeFiles/windows.dir/dmusicc.cpp.o
In file included from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/winhandles.h:3,
                 from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/dmusicc.h:3,
                 from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/dmusicc.cpp:1:
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:47:9: warning: "__int64" redefined
   47 | #define __int64 long long int
      |         ^~~~~~~
In file included from C:/Users/krimo/Downloads/msys2/mingw64/include/corecrt.h:10,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/crtdefs.h:10,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/stdint.h:28,
                 from C:/Users/krimo/Downloads/msys2/mingw64/lib/gcc/x86_64-w64-mingw32/14.1.0/include/stdint.h:9,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/c++/14.1.0/cstdint:45,
                 from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:20:
C:/Users/krimo/Downloads/msys2/mingw64/include/_mingw.h:241:9: note: this is the location of the previous definition
  241 | #define __int64 long long
      |         ^~~~~~~
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:193:9: warning: "__stdcall" redefined
  193 | #define __stdcall
      |         ^~~~~~~~~
<built-in>: note: this is the location of the previous definition
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:203:9: warning: "__forceinline" redefined
  203 | #define __forceinline inline
      |         ^~~~~~~~~~~~~
C:/Users/krimo/Downloads/msys2/mingw64/include/_mingw.h:264:9: note: this is the location of the previous definition
  264 | #define __forceinline inline __attribute__((__always_inline__))
      |         ^~~~~~~~~~~~~
[  1%] Building CXX object source/linux/libwindows/CMakeFiles/windows.dir/dsound.cpp.o
In file included from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/winhandles.h:3,
                 from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/dsound.h:3,
                 from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/dsound.cpp:1:
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:47:9: warning: "__int64" redefined
   47 | #define __int64 long long int
      |         ^~~~~~~
In file included from C:/Users/krimo/Downloads/msys2/mingw64/include/corecrt.h:10,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/crtdefs.h:10,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/stdint.h:28,
                 from C:/Users/krimo/Downloads/msys2/mingw64/lib/gcc/x86_64-w64-mingw32/14.1.0/include/stdint.h:9,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/c++/14.1.0/cstdint:45,
                 from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:20:
C:/Users/krimo/Downloads/msys2/mingw64/include/_mingw.h:241:9: note: this is the location of the previous definition
  241 | #define __int64 long long
      |         ^~~~~~~
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:193:9: warning: "__stdcall" redefined
  193 | #define __stdcall
      |         ^~~~~~~~~
<built-in>: note: this is the location of the previous definition
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:203:9: warning: "__forceinline" redefined
  203 | #define __forceinline inline
      |         ^~~~~~~~~~~~~
C:/Users/krimo/Downloads/msys2/mingw64/include/_mingw.h:264:9: note: this is the location of the previous definition
  264 | #define __forceinline inline __attribute__((__always_inline__))
      |         ^~~~~~~~~~~~~
[  2%] Building CXX object source/linux/libwindows/CMakeFiles/windows.dir/fileapi.cpp.o
In file included from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/fileapi.h:3,
                 from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/fileapi.cpp:1:
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:47:9: warning: "__int64" redefined
   47 | #define __int64 long long int
      |         ^~~~~~~
In file included from C:/Users/krimo/Downloads/msys2/mingw64/include/corecrt.h:10,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/crtdefs.h:10,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/stdint.h:28,
                 from C:/Users/krimo/Downloads/msys2/mingw64/lib/gcc/x86_64-w64-mingw32/14.1.0/include/stdint.h:9,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/c++/14.1.0/cstdint:45,
                 from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:20:
C:/Users/krimo/Downloads/msys2/mingw64/include/_mingw.h:241:9: note: this is the location of the previous definition
  241 | #define __int64 long long
      |         ^~~~~~~
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:193:9: warning: "__stdcall" redefined
  193 | #define __stdcall
      |         ^~~~~~~~~
<built-in>: note: this is the location of the previous definition
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:203:9: warning: "__forceinline" redefined
  203 | #define __forceinline inline
      |         ^~~~~~~~~~~~~
C:/Users/krimo/Downloads/msys2/mingw64/include/_mingw.h:264:9: note: this is the location of the previous definition
  264 | #define __forceinline inline __attribute__((__always_inline__))
      |         ^~~~~~~~~~~~~
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/fileapi.h:43:9: warning: "_MAX_EXT" redefined
   43 | #define _MAX_EXT            _MAX_FNAME
      |         ^~~~~~~~
In file included from C:/Users/krimo/Downloads/msys2/mingw64/include/c++/14.1.0/cstdlib:79,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/c++/14.1.0/stdlib.h:36,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/assert.h:17,
                 from C:/Users/krimo/Downloads/msys2/mingw64/include/c++/14.1.0/cassert:44,
                 from C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/wincompat.h:21:
C:/Users/krimo/Downloads/msys2/mingw64/include/stdlib.h:123:9: note: this is the location of the previous definition
  123 | #define _MAX_EXT 256
      |         ^~~~~~~~
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/fileapi.cpp: In function 'DWORD GetFullPathName(const char*, DWORD, char*, char**)':
C:/Users/krimo/Downloads/msys2/home/krimo/AppleWin/source/linux/libwindows/fileapi.cpp:133:25: error: 'realpath' was not declared in this scope
  133 |   const char * result = realpath(filename, buffer);
      |                         ^~~~~~~~
make[2]: *** [source/linux/libwindows/CMakeFiles/windows.dir/build.make:104: source/linux/libwindows/CMakeFiles/windows.dir/fileapi.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:196: source/linux/libwindows/CMakeFiles/windows.dir/all] Error 2
make: *** [Makefile:156: all] Error 2

[audetto]

unfortunately, my Windows on qemu is barely usable, and msys2 does not really work on wine.

so, at the moment I struggle to replicate your build environment.

anyway, I am not surprised that a lot of the content of libwindows clashes with a real Windows compiler. you will have to try to tweak until you get something decent.

meanwhile I will keep trying to install msys2 somewhere.