undefined reference on OpenBSD to some standard C library functions

[markand]

Building latest git throws some undefined reference to some C functions from standard library.

[  4%] Linking C shared library libSDL3_image.so
/usr/local/bin/cmake -E cmake_link_script CMakeFiles/SDL3_image.dir/link.txt --verbose=1
/usr/bin/cc -fPIC -Os -DNDEBUG -Wl,--no-undefined -shared -Wl,-soname,libSDL3_image.so.0 -o libSDL3_image.so.0.0.0 CMakeFiles/SDL3_image.dir/IMG.c.o CMakeFiles/SDL3_image.dir/IMG_WIC.c.o CMakeFiles/SDL3_image.dir/IMG_avif.c.o CMakeFiles/SDL3_image.dir/IMG_bmp.c.o CMakeFiles/SDL3_image.dir/IMG_gif.c.o CMakeFiles/SDL3_image.dir/IMG_jpg.c.o CMakeFiles/SDL3_image.dir/IMG_jxl.c.o CMakeFiles/SDL3_image.dir/IMG_lbm.c.o CMakeFiles/SDL3_image.dir/IMG_pcx.c.o CMakeFiles/SDL3_image.dir/IMG_png.c.o CMakeFiles/SDL3_image.dir/IMG_pnm.c.o CMakeFiles/SDL3_image.dir/IMG_qoi.c.o CMakeFiles/SDL3_image.dir/IMG_stb.c.o CMakeFiles/SDL3_image.dir/IMG_svg.c.o CMakeFiles/SDL3_image.dir/IMG_tga.c.o CMakeFiles/SDL3_image.dir/IMG_tif.c.o CMakeFiles/SDL3_image.dir/IMG_webp.c.o CMakeFiles/SDL3_image.dir/IMG_xcf.c.o CMakeFiles/SDL3_image.dir/IMG_xpm.c.o CMakeFiles/SDL3_image.dir/IMG_xv.c.o CMakeFiles/SDL3_image.dir/IMG_xxx.c.o  -Wl,-z,origin,-rpath,/usr/local/lib: /usr/local/lib/libSDL3.so.0.0.0 /usr/local/lib/libjpeg.so.70.0 /usr/local/lib/libpng.so.18.0 /usr/lib/libz.so.7.0 -Wl,-rpath-link,/usr/X11R6/lib:/usr/local/lib 
ld: error: undefined symbol: setjmp
>>> referenced by IMG_jpg.c
>>>               CMakeFiles/SDL3_image.dir/IMG_jpg.c.o:(IMG_LoadJPG_RW)
>>> referenced by IMG_png.c
>>>               CMakeFiles/SDL3_image.dir/IMG_png.c.o:(IMG_LoadPNG_RW)
>>> referenced by IMG_png.c
>>>               CMakeFiles/SDL3_image.dir/IMG_png.c.o:(IMG_SavePNG_RW_libpng)

ld: error: undefined symbol: longjmp
>>> referenced by IMG_jpg.c
>>>               CMakeFiles/SDL3_image.dir/IMG_jpg.c.o:(my_error_exit)
>>> referenced by IMG_png.c
>>>               CMakeFiles/SDL3_image.dir/IMG_png.c.o:(IMG_LoadPNG_RW)
>>> referenced by IMG_png.c
>>>               CMakeFiles/SDL3_image.dir/IMG_png.c.o:(IMG_SavePNG_RW_libpng)

ld: error: undefined symbol: memset
>>> referenced by IMG_svg.c
>>>               CMakeFiles/SDL3_image.dir/IMG_svg.c.o:(nsvg__initPaint)
cc: error: linker command failed with exit code 1 (use -v to see invocation)
*** Error 1 in . (CMakeFiles/SDL3_image.dir/build.make:421 'libSDL3_image.so.0.0.0')
*** Error 2 in . (CMakeFiles/Makefile2:83 'CMakeFiles/SDL3_image.dir/all')
*** Error 2 in /home/markand/SDL_image-main/build (Makefile:136 'all')

I'll check what can cause the issue.

[DebugBSD]

Did you solve this problem @markand ? I've exactly the same problem with the current verson of SDL3_image.

If you solved it, please, can you explain how did you do it?

I'm using OpenBSD-current.

EDIT: I've solved the linker error removing the argument --no-undefined from the file CMakeFiles/SDL3_image-shared.dir/link.txt. This is the only solution I've found until now. Later I'll do some tests to be sure I'm not messed everything up and everything works fine.

[sezero]

-Wl,--no-undefined shouldn't be used with OpenBSD: See SDL's own cmake'ry where it's done right. This should be fixed possibly in all SDL satellite libraries, and possibly in all active branches.

CC @madebr

[DebugBSD]

-Wl,--no-undefined shouldn't be used with OpenBSD: See SDL's own cmake'ry where it's done right. This should be fixed possibly in all SDL satellite libraries, and possibly in all active branches.

CC @madebr

Thank you so much! I knew that something was wrong with that argument. But what I didn't know is how to remove it from CMakefiles cause I don't know how to remove it in the cmake config. (I'm a NOOB with everything related to CMake)

[madebr]

Can you try current main?

[sezero]

Yes, c35c94e looks like the right way to go. It should be backported to SDL2 and release-2.?.x branches too. And the other satellite libs probably need the same treatment.

[DebugBSD]

In SDL_ttf is fixed in the file cmake/PrivateSdlFunctions.cmake:276
In SDL_mixer is fixed too with the same check

Thank you so much all of you for you help!

[madebr]

I backported it to all SDL3/SDL2 and release branches.

[sezero]

I backported it to all SDL3/SDL2 and release branches.

Great.

P.S.: SDL_rtf main + SDL2 branches seem to have been missed.

[madebr]

Done. Will SDL_rtf ever get a release?

[slouken]

Done. Will SDL_rtf ever get a release?

There's no release planned, no.