Adjust cmake code to support building a Windows arm64 binary on a
Windows x86/x64 host.
Add /EHsc to MSVC compiler flags for exception unwind support.
Check VCPKG_TARGET_TRIPLET in Architecture.cmake to set the appropriate
cmake variables for cross-compiling for arm64.
Add MSVC_x86_Host_Compile.cmake script, used from HostCompile.cmake, to
adjust the path of the cl.exe compiler and ENV{LIB} to build a C program
for x86 when cross-compiling, necessary for the bin2c utility.
Use wxrc from dependencies submodule when cross-compiling, because the
cross wxrc executable cannot be run on the host.
Signed-off-by: Rafael Kitover <rkitover@gmail.com>
Only add the macro `-D_FORTIFY_SOURCE=2` if we are linking to libssp
with gcc, do not use it at all on clang.
For `HostCompile.cmake` add the macro `-Dmain=main` to redefine the
macro added by SDL2 to compile flags `-Dmain=SDL_main`.
Fix#548.
Signed-off-by: Rafael Kitover <rkitover@gmail.com>
See #465
To compile the build tool `bin2c`, add a target with `add_executable()`
on visual studio instead of using `HostCompile.cmake` because running
`cl.exe` fails in the appveyor visual studio environment, see:
https://developercommunity.visualstudio.com/content/problem/325122/c1356-unable-to-find-mspdbcoredll.html
Also update the dependencies module to latest.
appveyor build now tested to work.
Signed-off-by: Rafael Kitover <rkitover@gmail.com>
gcc lto wrapper commands such as `gcc-ar` will segfault with some
versions of gcc 7.x when called via an absolute path, see:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80717
Generalize the mechanism for compiling a small C program on the host
(currently used for bin2c for Wx resources) and use it to wrap the gcc
wrappers in a little executable that prepends their dirname to PATH and
runs them with `execvp()`.
Make LTO default to ON again, except on win32 with gcc < 7, because
those toolchains produce broken binaries with LTO enabled.
Also add `-ffat-lto-objects` to compiler flags for gcc when LTO is
enabled, this will increase the chances that the LTO build will succeed
even if there are issues with the binutils wrappers. Clang does not
support this.
Rafael Kitover