premake/README-linux.txt
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     1 You may generate GNU makefiles for building SDL2 and its related test suite by
       
     2 using the gmake shell script in the Linux/build-scripts folder.
       
     3 
       
     4 Linux support is currently experimental for the meta-build system. Most of the
       
     5 progress made on this support happened toward the end of the meta-build system
       
     6 project, so there is a lot currently missing that could be added in the future.
       
     7 For the most part, the Linux support works well, but there is a significant
       
     8 amount of testing needed to verify it can be built in many different
       
     9 environments.
       
    10 
       
    11 The Linux project does not target every dependency it should (as seen in the
       
    12 autotools configure script or in the CMake script), but it does target the
       
    13 following dependencies:
       
    14 
       
    15   -D-Bus (required to build Linux at all)
       
    16   -DLOpen (most of the other dependencies are dependent on this)
       
    17   -ALSA
       
    18   -PulseAudio
       
    19   -ESD
       
    20   -NAS
       
    21   -OSS
       
    22   -X11
       
    23   -OpenGL
       
    24 
       
    25 Also, the Linux system should be building the SDL2 library as a shared library,
       
    26 but it builds it as a static library because of a few premake-related issues.
       
    27 This is because when the makefile generated by premake tells the linker where to
       
    28 find the definitions library (libSDL2.o), it also gives a hint to the loader to
       
    29 find libSDL2.so in the same place, with a relative path. This means in order to
       
    30 execute the program dynamically linked to SDL2, it's looking in some path like:
       
    31 
       
    32   "../../SDL2/Build/Debug"
       
    33 
       
    34 Now, while this path works at the location of the makefile (such as
       
    35 ./tests/testsprite), it does not make sense from the actual location of the
       
    36 executable (./tests/testsprite/Build/Debug). Furthermore, it's just massively
       
    37 inconvenient to have a relative path to look for the shared object. Moving
       
    38 libSDL2.so into the same directory as the executable does not solve this issue.
       
    39 Unfortunately, premake also does not allow an install target to be created for
       
    40 the makefiles, which is another one of the major issues related to building SDL2
       
    41 as a shared library on Linux. Once these problems are solved, this support
       
    42 should be very straightforward to add to this system in the future.
       
    43 
       
    44 The Linux system does have both an automated test and cleaning shell files for
       
    45 running through the entire supported test suite and cleaning up the generated
       
    46 and built files, respectively.