This does not seem to work anymore in 1.10.0 (x64 Linux):

multiput_alpha.bas(24) error 4: Duplicated definition in 'Byval Param As Any Ptr = 0)'

Thanks angros, that sounds like a good solution. I'll try some experimentation.

Just tried to compile ExtLibsfx under DOS, but get this error:
I use DosBox-X to compile because it supports long filenames.

@N3trunn3r Glad it works now. Is the sound quality good enough? Sounds good on Win and Linux :) midi, wav, play, all works fine, testing for DOS soon... But the main reason to use fbsfx was actually to be able to recompile old QB games that use the "PLAY" statement. fbsfx does not seem to...

Do not worry about the "warning 20(2): Object files or libraries with mixed multithreading (-mt) options, ./libfbsfx.a": it only means that the library is multithreading (it uses a thread to activate the midi player), and the rest of the code is not, so it might cause errors if some subro...

Can't compile either under Debian 11 x64. FreeBASIC Compiler - Version 1.07.1 PLAY from freebasic-portal.de fails fbc Menuett_Krieger.bas Menuett_Krieger.c: In function ‘SOUND_DOS_LIN’: Menuett_Krieger.c:59:2: warning: listing the stack pointer register ‘rsp’ in a clobber list is deprecated [-Wdepre...

I have some old QB code and would like to compile it on modern systems. But the PLAY statement is missing. The FB manual states: PC Speaker commands no longer function: Any references to SOUND or PLAY statements will result in an error message. There is a third party library available to emulate thi...

Here is the dll and an import library file https://www.mediafire.com/file/7zg0w4190x5ncht/Cairo64bitsdll.zip/file Thanks, works just fine! :) Where does the cairo.dll comes from? I am much happier to get dlls from a single source, rather than have to deal with different files and versions. For x32 ...

Can someone provide a static 64-bit library for Cairo?
But now i wonder if it is even possible to build a x64 library for Cairo...

If not, can I somehow use x32 libraries with fbc x64?

Did some more testing:
gdb gives:

Program recived signal SIGSEGV, Segmantation fault.
0x000099fb in __dpmi_int ()

I only get errors in DOSBox Staging (version 0.78.1), and I have no issues in ordinary DOSBox (version 0.74-3), get no errors there whatsoever. That you got issues with ordinary DOSBox (version 0.74-3) only adds to my confusion :P But that could mean that there might be a bug in DOSBox. And not to c...

Compiling a program that only contains: sleep or sleep 500 Crashes in DOSBox Staging with SIGSEGV. But compiling/running sleep 1, 1 seems to work just fine. I also tried to compile/run DOS/isrtimer.bas, DOS/textbuff.bas and graphics/qbsprite.bas isrtimer.bas crashes in the same manner (SIGSEGV). tex...

Lot's of great advice! Thanks to everyone :) , I found the error.

I am trying to compile an old game I wrote for Windows 7 several years ago. It works fine on Windows but when I try to compile under Debian 10 x64 i get: malloc(): invalid size (unsorted) I could put in some print statement to find the culprit but I would like to take this opportunity to learn somet...

Will not compile: Suspicious logic operation, mixed boolean and non-boolean

What is the best solution here? A one-liner would be good.

Ah right, FBImage, forgot all about it. Thank you! Works nicely for now.
Doubt though it will run under dos. Only comes with static Linux and Win libs, 32/64-bit.