Added x86 asm and C wav writer and player examples.

[LeStahL]

Hey, I finished the examples.

• Added win32, elf32 and elf64 asm player and wav writers using winmm.
• Added dsound player in C.
• Separated the ALL target and the examples; introduced a new examples target.

[vsariola]

In cwav.c, I'm getting some build errors with the Microsoft compiler; at least the packing could be done with #pragma pack(push, 1) and #pragma pack(pop) which should work with both Microsoft and GCC too.

Also: cwav.c(38): error C2099: initializer is not a constant. I'm not sure what's up with that, looks pretty constant to me.

[LeStahL]

Ah, I tested windows with mingw - yeah, good suggestion with the pragma.

interestingly, the other problem is a C language problem - static or global aggregate initializer lists have to be compile-time constants, which the sizeof expression isn't. gcc allows this, MSVC insists on the standard here.

solution: I initialized the struct inside main, should work now.

[vsariola]

Can you:

1) Add something like the following quick fix to the cplay.windows.directsound.c, as the headers in MinGW don't include this definition:

#ifndef DSBCAPS_TRUEPLAYPOSITION // Not defined in MinGW dsound headers, so let's add it
#define DSBCAPS_TRUEPLAYPOSITION 0x00080000
#endif

This allows fixes compiling the directsound thingy with Mingw on windows.

2) Add following quick fix to examples\code\C\CMakeLists.txt:

# this fixes a bug in creating a static library from asm, similar to
# https://discourse.cmake.org/t/building-lib-file-from-asm-cmake-bug/1959
# but for NASM
if (MSVC)
    set(CMAKE_ASM_NASM_CREATE_STATIC_LIBRARY "<CMAKE_AR> /OUT:<TARGET> <LINK_FLAGS> <OBJECTS>")
endif()

3) In examples\code\asm\CMakeLists.txt, tell MinGW to not link CRT i.e.

    if(WIN32)
        set(abi win)
        set(libraries ${windows_libraries})
        if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
            set(link_options -nostartfiles)
        endif()
    ....

4) Squash all the fixes into one & force push; I'll rebase and merge to keep linear history

[vsariola]

LGTM! Thanks!