Problems with SDL

[S0ulan]

I have SDL 1.2 and 2.0 installed on my System. I get this while "make"

gcc -m32 -g -Wall -DNORMALUNIX -DLINUX -DSDL -L/usr/lib/i386-linux-gnu/ linux/doomdef.o linux/doomstat.o linux/dstrings.o linux/i_system.o linux/i_sound.o linux/i_sdl_video.o linux/i_net.o linux/tables.o linux/f_finale.o linux/f_wipe.o linux/d_main.o linux/d_net.o linux/d_items.o linux/g_game.o linux/m_menu.o linux/m_misc.o linux/m_argv.o linux/m_bbox.o linux/m_fixed.o linux/m_swap.o linux/m_cheat.o linux/m_random.o linux/am_map.o linux/p_ceilng.o linux/p_doors.o linux/p_enemy.o linux/p_floor.o linux/p_inter.o linux/p_lights.o linux/p_map.o linux/p_maputl.o linux/p_plats.o linux/p_pspr.o linux/p_setup.o linux/p_sight.o linux/p_spec.o linux/p_switch.o linux/p_mobj.o linux/p_telept.o linux/p_tick.o linux/p_saveg.o linux/p_user.o linux/r_bsp.o linux/r_data.o linux/r_draw.o linux/r_main.o linux/r_plane.o linux/r_segs.o linux/r_sky.o linux/r_things.o linux/w_wad.o linux/wi_stuff.o linux/v_video.o linux/st_lib.o linux/st_stuff.o linux/hu_stuff.o linux/hu_lib.o linux/s_sound.o linux/z_zone.o linux/info.o linux/sounds.o linux/i_main.o
-o linux/sdl_doom -lSDL
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/../../../libSDL.so when searching for -lSDL
/usr/bin/ld: skipping incompatible /usr/lib/libSDL.so when searching for -lSDL
/usr/bin/ld: cannot find -lSDL
collect2: error: ld returned 1 exit status
make: *** [Makefile:87: linux/sdl_doom] Error 1

This is because you lack the 32-bit SDL libraries.

In my case, on Arch Linux, I had to install lib32-sdl (or lib32-sdl12-compat) (and optionally lib32-sdl2).
This should fix your issue.

[olivier1980]

I had the same problem, but 32 bit libraries aren't supported under 64bit Ubuntu anymore, so I used a 32 bit Debian distro (in VirtualBox).