-DWITH_SYSTEM_GLFW=ON: Link against system glfw and fail otherwise
-DWITH_SYSTEM_GLFW=OFF: Use embedded rglfw.c
-DWITH_SYSTEM_GLFW=IF_POSSIBLE: Probe for system glfw but fallback to
rglfw if unavailable
Also change Linux 64-bit CI build to install system glfw and use it,
so this doesn't bitrot.
Addresses #453.
They were disabled because they failed to build,
but this patch set fixes the build on Linux and macOS.
This doesn't apply to the AppVeyor build on Windows yet;
it currently fails at linking with OpenAL.
After installation, compiling new programs is possible with
$ cc game.c `pkg-config --static --libs --cflags raylib`
or
$ cc game.c `pkg-config --libs --cflags raylib`
depending on configuration
Also adds following configuration options:
- WITH_PIC "Compile static library as position-independent code"
- STATIC_RAYLIB "Build raylib as a static library"
- MACOS_FATLIB "Build fat library for both i386 and x86_64 on macOS"
There have been two problems:
* GLFW itself was compiled with the definitions for compiling
_against_ GLFW (fixed by removing requirement for external glfw)
* rglfw.c was being compiled as C code, although it includes
Objective C files.
This _might_ break the Windows build, needs to be checked.
Fixes#391, but as noted I'd prefer though a separate source directory
and build script for GLFW.
