SDL2

SDL 2.0.14 is now released:

- https://github.com/AmigaPorts/SDL/releases
- http://os4depot.net/?function=showfile&file=library/misc/sdl2.lha

+ Many bugfixes since 2.0.12.
+ New gamecontroller mappings have been added.


@IamSONIC

Thanks, I will keep an eye on that thread.

@Capehill

Quote:

Outstanding! Thank you!!

Quote:

Simple but funny game using 2.0.14 available here

@Capehill

Recompiled a couple of games here with "-use-dynld" switch and no porlems, excpet on ZGlomm it compies ok, but when runnig I get a requester:

ELF.library: Unable to resolve symbol '_ZNSt7_cxx1112basic_stringSt11char_....'

Compiling without "-use-dynld" no problems.

link line is:
ppc-amigaos-g++ zgui.o hud.o script.o iffhandler.o font.o objectgraphics.o quick.o monsterlogic.o config.o zgloom.o renderer.o menuscreen.o decrunchmania.o titlescreen.o gloommap.o gloommaths.o gamelogic.o soundhandler.o binresource.o -lSDL2_mixer -lxmp -lmikmod -lmodplug -lFLAC -lsmpeg2 -lvorbisfile -lvorbis -logg -lSDL2 -athread=native -use-dynld -o ZGloom.debug

@jabirulo

That's because you need to use the updated libstdc++.so of the gcc version you used to compile. Note that this file is not (IIRC) backwards compatible with the one currently in SOBJS: and will break existing programs if put there, so you should include it with your program in PROGDIR:SObjs instead.

If you use static linking you avoid this problem.

@salass00
Thx I'm using gcc version 8.4.0 (adtools build 8.4.0) to compile.

So when new full SDK is out and new/updated GCC and thus stdc++.so then there should be no such requester/problem.

Ok stick to static then.

@jabirulo

Quote:

IIRC one of the solutions that was discussed was to build the new libstdc++.so with a different name so that it can be installed next to the old version without causing any conflicts.

@salass00

Thank you for your continuous work on sdl

@Raziel

I think you mean Capehill. I've only done a couple of minor fixes to the SDL port and that was years ago.

Recently I've been mainly working on updating our newlib port with code from newlib 3.1.0 leading to better C++ support among other things.

@salass00

Gah, note to self, reread your posts

Thank you for your work on newlib...if you need someone to test shared, just shout (I feel like I told you that already)

@capehill

Thank you for your continuous work on sdl

@Raziel

Thank you for using and testing it :)

@all

I am following multi-platform SDL2 tutorials on this page. I was able to compile and run first 5 examples. However I have a difficulty with SDL2_image.

The example basically loads a PNG file and displays on the screen.

I am compiling the examples with this following command
ppc-amigaos-g++ -w -athread=native 06_extension_libraries_and_loading_other_image_formats.cpp -o 06_SDL -lSDL2_image -lSDL2

However I get following errors:
$ ppc-amigaos-g++ -w -athread=native 06_extension_libraries_and_loading_other_image_formats.cpp -o 06_SDL -lSDL2_image -lSDL2
/usr/local/amiga/ppc-amigaos/SDK/local/newlib/lib/libSDL2_image.a(IMG_jpg.o): In function `IMG_SaveJPG_RW_jpeglib':
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:499: undefined reference to `jpeg_std_error'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:503: undefined reference to `jpeg_CreateCompress'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:511: undefined reference to `jpeg_set_defaults'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:512: undefined reference to `jpeg_set_quality'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:513: undefined reference to `jpeg_start_compress'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:518: undefined reference to `jpeg_write_scanlines'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:521: undefined reference to `jpeg_finish_compress'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:522: undefined reference to `jpeg_destroy_compress'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:499: undefined reference to `jpeg_std_error'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:503: undefined reference to `jpeg_CreateCompress'
/usr/local/amiga/ppc-amigaos/SDK/local/newlib/lib/libSDL2_image.a(IMG_jpg.o): In function `IMG_LoadJPG_RW':
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:339: undefined reference to `jpeg_std_error'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:353: undefined reference to `jpeg_CreateDecompress'
/usr/local/amiga/ppc-amigaos/SDK/local/newlib/lib/libSDL2_image.a(IMG_jpg.o): In function `jpeg_SDL_RW_src':
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:296: undefined reference to `jpeg_resync_to_restart'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:296: undefined reference to `jpeg_resync_to_restart'
/usr/local/amiga/ppc-amigaos/SDK/local/newlib/lib/libSDL2_image.a(IMG_jpg.o): In function `IMG_LoadJPG_RW':
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:355: undefined reference to `jpeg_read_header'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:381: undefined reference to `jpeg_calc_output_dimensions'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:402: undefined reference to `jpeg_start_decompress'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:406: undefined reference to `jpeg_read_scanlines'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:408: undefined reference to `jpeg_finish_decompress'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:409: undefined reference to `jpeg_destroy_decompress'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:344: undefined reference to `jpeg_destroy_decompress'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:361: undefined reference to `jpeg_calc_output_dimensions'
/home/Michael/SDL2_image-2.0.5/IMG_jpg.c:395: undefined reference to `jpeg_destroy_decompress'
/usr/local/amiga/ppc-amigaos/SDK/local/newlib/lib/libSDL2_image.a(IMG_png.o): In function `png_read_data':
/home/Michael/SDL2_image-2.0.5/IMG_png.c:246: undefined reference to `png_get_io_ptr'
/usr/local/amiga/ppc-amigaos/SDK/local/newlib/lib/libSDL2_image.a(IMG_png.o): In function `png_write_data':
/home/Michael/SDL2_image-2.0.5/IMG_png.c:526: undefined reference to `png_get_io_ptr'
/usr/local/amiga/ppc-amigaos/SDK/local/newlib/lib/libSDL2_image.a(IMG_png.o): In function `IMG_SavePNG_RW_libpng':
/home/Michael/SDL2_image-2.0.5/IMG_png.c:544: undefined reference to `png_create_write_struct'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:550: undefined reference to `png_create_info_struct'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:558: undefined reference to `png_set_longjmp_fn'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:586: undefined reference to `png_set_PLTE'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:593: undefined reference to `png_set_write_fn'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:595: undefined reference to `png_set_IHDR'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:613: undefined reference to `png_set_rows'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:614: undefined reference to `png_write_png'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:621: undefined reference to `png_destroy_write_struct'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:552: undefined reference to `png_destroy_write_struct'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:564: undefined reference to `png_destroy_write_struct'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:605: undefined reference to `png_destroy_write_struct'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:577: undefined reference to `png_destroy_write_struct'
/usr/local/amiga/ppc-amigaos/SDK/local/newlib/lib/libSDL2_image.a(IMG_png.o): In function `IMG_LoadPNG_RW':
/home/Michael/SDL2_image-2.0.5/IMG_png.c:283: undefined reference to `png_create_read_struct'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:291: undefined reference to `png_create_info_struct'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:304: undefined reference to `png_set_longjmp_fn'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:458: undefined reference to `png_destroy_read_struct'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:314: undefined reference to `png_set_read_fn'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:317: undefined reference to `png_read_info'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:318: undefined reference to `png_get_IHDR'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:322: undefined reference to `png_set_strip_16'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:325: undefined reference to `png_set_interlace_handling'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:330: undefined reference to `png_set_packing'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:334: undefined reference to `png_set_expand'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:339: undefined reference to `png_get_valid'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:369: undefined reference to `png_set_gray_to_rgb'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:371: undefined reference to `png_read_update_info'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:373: undefined reference to `png_get_IHDR'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:378: undefined reference to `png_get_channels'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:423: undefined reference to `png_read_image'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:438: undefined reference to `png_get_PLTE'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:342: undefined reference to `png_get_tRNS'
/home/Michael/SDL2_image-2.0.5/IMG_png.c:361: undefined reference to `png_set_expand'
/usr/local/amiga/ppc-amigaos/SDK/local/newlib/lib/libSDL2_image.a(IMG_tif.o): In function `IMG_LoadTIF_RW':
/home/Michael/SDL2_image-2.0.5/IMG_tif.c:179: undefined reference to `TIFFClientOpen'
/home/Michael/SDL2_image-2.0.5/IMG_tif.c:185: undefined reference to `TIFFGetField'
/home/Michael/SDL2_image-2.0.5/IMG_tif.c:186: undefined reference to `TIFFGetField'
/home/Michael/SDL2_image-2.0.5/IMG_tif.c:197: undefined reference to `TIFFReadRGBAImageOriented'
/home/Michael/SDL2_image-2.0.5/IMG_tif.c:210: undefined reference to `TIFFClose'
/home/Michael/SDL2_image-2.0.5/IMG_tif.c:200: undefined reference to `TIFFClose'
/usr/local/amiga/ppc-amigaos/SDK/local/newlib/lib/libSDL2_image.a(IMG_webp.o): In function `IMG_LoadWEBP_RW':
/home/Michael/SDL2_image-2.0.5/IMG_webp.c:201: undefined reference to `WebPGetFeaturesInternal'
/home/Michael/SDL2_image-2.0.5/IMG_webp.c:232: undefined reference to `WebPDecodeRGBAInto'
/home/Michael/SDL2_image-2.0.5/IMG_webp.c:234: undefined reference to `WebPDecodeRGBInto'
collect2: error: ld returned 1 exit status

@SinanSam460

You need to add at least -ljpeg -lpng -lTIFF -lWebP -lz. SDL2_image has lots of dependencies.

@Capehill

Thanks. I have found all other dependecies on OS4Depot and copied to SDK directory on gcc10 (CygWin64 cross compiler)

ppc-amigaos-g++ -athread=native 06_extension_libraries_and_loading_other_image_formats.cpp -o 06_SDL -ljpeg -lpng -ltiff -lwebp -lz -lSDL2 -lSDL2_image

But I still get the same errors...

@SinanSam460

You should add the dependencies after -lSDL2_image, not before.

@salass00

Thanks..adding -lpthreads and installing the SDK solved the problem.

ppc-amigaos-g++ -athread=native 06_extension_libraries_and_loading_other_image_formats.cpp -o 06_SDL -lSDL2 -lSDL2_image -ljpeg -lpng -ltiff -lwebp -lz -lpthread

@SinanSam460

SDL 2.0.14 is not using pthreads. Was there a reason you needed to add -ltphreads?

@Capehill
When using -athread=native for big enough projects, -lpthreads usually need it. At least for c++ code for sure (i.e. not SDL2 related, but compiler itself)

@kas1e

Wasn't there a separate threading model -athread=pthreads or similar for using posix threads? (single, native and pthreads?)

There was nothing about pthreads in Sinan's linking errors, hence I don't understand why to link with pthreads?

@Capehill
Quote:

Yeah, there "single" and "native" for now. Also it has "pthread", but by default that file not compiled in (need gthr-amigaos-pthread.o, which can be build separately from adtools repo, but this one luck important functions implementations, so of no real use now, see: https://github.com/sba1/adtools/issues/95)

Quote:

Maybe he just copy+paste, or maybe some of those 3d party libs need pthreads, and errors he has only arisen after he link with them :)