Under Windows, Scons is now capable of detecting and compiling with
standalone MSVC compilers (aka "Visual C++ Build Tools").
http://landinghub.visualstudio.com/visual-cpp-build-tools
Tried with version 2015, and native x86 and x64 compilers under
Windows 10 pro 64 and Windows 8.1 64, with the default Win8 SDK
provided by the "Visual C++ Build Tools" web-installer.
Follow the same compiling instructions than for compiling with Visual
Studio, except that Visual Studio is no more required.
KNOWN ISSUES :
- ``methods.detect_visual_c_compiler_version()`` will emit a warning message
on computers where the ``VSINSTALLDIR`` environement variable is not present.
But it should compile just fine and still automatically detects the 32 or
64 bits according to the compiler you picked.
TODO :
- eventually, update ``platform/winrt/dectet.py`` with function
``methods.msvc_is_detected()`` and try to compile winrt/UWP with
these standalone compilers (if you did not select Win10 SDK when
installing the standalone tools, you can run it again).
- update doc to make users aware of "Visual C++ Build Tools" aka
"stadalone MSVC".
- eventually, update ``methods.detect_visual_c_compiler_version()``
The original, uncommited fix simply changed compiler flag /MT to /MD. This
would link the C runtime dynamically instead of statically. This is bad,
because some users would have to install the c runtime before starting the
editor.
You can find alot of info about this error, which can happen after
upgrading to VS 2015, and there are workarounds. But I realized, that the
only place, where iob_func is used, is in e_os.h of the openssl library.
The latest version already contains a workaround. I simply updated the
part in e_os.h.
Reference: https://github.com/openssl/openssl/blob/master/e_os.h#L268
Reference: https://software.intel.com/en-us/forums/intel-parallel-studio-beta-archived/topic/266345
Reference: https://connect.microsoft.com/VisualStudio/feedback/details/1144980/error-lnk2001-unresolved-external-symbol-imp-iob-func
Reference: http://stackoverflow.com/questions/757418/should-i-compile-with-md-or-mt
Here's the original error message:
Creating library bin\godot.windows.tools.lib and object bin\godot.windows.tools.exp
drivers1.windows.tools.lib(t1_enc.windows.tools.obj) : error LNK2001: unresolved external symbol ___iob_func
drivers1.windows.tools.lib(txt_db.windows.tools.obj) : error LNK2001: unresolved external symbol ___iob_func
drivers1.windows.tools.lib(d1_enc.windows.tools.obj) : error LNK2001: unresolved external symbol ___iob_func
drivers1.windows.tools.lib(ui_openssl.windows.tools.obj) : error LNK2001: unresolved external symbol ___iob_func
drivers1.windows.tools.lib(cryptlib.windows.tools.obj) : error LNK2001: unresolved external symbol ___iob_func
drivers1.windows.tools.lib(pem_lib.windows.tools.obj) : error LNK2001: unresolved external symbol ___iob_func
drivers1.windows.tools.lib(d1_both.windows.tools.obj) : error LNK2001: unresolved external symbol ___iob_func
drivers1.windows.tools.lib(rsa_sign.windows.tools.obj) : error LNK2001: unresolved external symbol ___iob_func
bin\godot.windows.tools.exe : fatal error LNK1120: 1 unresolved externals
scons: *** [bin\godot.windows.tools.exe] Error 1120
-=-=-=-=-=-=-=-=-=-=-=-=-=
-Begin work on Navigation Meshes (simple pathfinding for now, will improve soon)
-More doc on theme overriding
-Upgraded OpenSSL to version without bugs
-Misc bugfixes
