Compilation error on Rasperry Pi OS (12 Bookwork) 64-bit

[mrgw454]

Hello,

Trying to compile adamem on a new Raspberry Pi 5 system and getting the following error:

IDE/HarddiskIDE.c:247:12: warning: variable ‘totalSectors’ set but not used [-Wunused-but-set-variable]
  247 |     UInt32 totalSectors;
      |            ^~~~~~~~~~~~
gcc      -Wall -Wformat=0 -O2 -fomit-frame-pointer -IIDE -DLSB_FIRST -DSDL -DDEBUG -DSOUND -DSOUND_PSG -DIDEHD -I/usr/include/SDL2   -c -o sms_ntsc.o sms_ntsc.c
gcc      -s -o adamem ADAMEm.o Coleco.o Z80.o AdamemSDL.o AdamSDLSound_2.o Sound.o Z80Debug.o Bitmap.o HarddiskIDE.o sms_ntsc.o -lz `sdl2-config --static-libs` -lm
/usr/bin/sdl2-config: 61: : Permission denied
/usr/bin/ld: cannot find /usr/lib//libSDL2.a: No such file or directory
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile.SDL:23: adamem] Error 1
make[1]: Leaving directory '/home/pi/source/adamem_sdl'
make: *** [Makefile:22: sdl] Error 2

I used the command:

make sdl

... to compile.

I have sdl2 2.26.5 installed.

The missing file shown in the error is located on the system:

pi@raspberrypi:~/source $ ls -l /usr/lib/aarch64-linux-gnu/libSDL2.a
-rw-r--r-- 1 root root 3513644 Apr 12  2023 /usr/lib/aarch64-linux-gnu/libSDL2.a

Any help you can provide would be appreciated. Thank you!

[geoffdaddy]

Check the exec permissions on sdl2-config. Doesn't look like it was able to execute that during linking.

[mrgw454]

I noticed that error as well, but permissions are good (running as user pi):

pi@raspberrypi:~ $ sdl2-config --version
2.26.5
pi@raspberrypi:~ $ whoami
pi
pi@raspberrypi:~ $

pi@raspberrypi:~ $ which sdl2-config
/usr/bin/sdl2-config
pi@raspberrypi:~ $ ls -l /usr/bin/sdl2-config
-rwxr-xr-x 1 root root 1999 Apr 12  2023 /usr/bin/sdl2-config

It could be that is a false error, perhaps due to something else?

[mrgw454]

Based on this line:

/usr/bin/ld: cannot find /usr/lib//libSDL2.a: No such file or directory It looks like the linker is unable to determine the architecture type for the system. Is that why you see two // characters in the path?

Here's where the file is on my system:

/usr/lib/aarch64-linux-gnu/libSDL2.a

[geoffdaddy]

yeah, the linker can't find it because of the sdl2-config issue. That is a script that is included with SDL to provide appropriate linker options to the linker when using the --static-libs option. Try running that utility script directly with --static-libs and see what it shows. (could also try running the build with sudo, but that shouldn't be necessary if things are working properly).

[geoffdaddy]

(see Makefile.SDL) line 23.

[mrgw454]

Interesting -- that script is included in this package:

pi@raspberrypi:~/source/adamem_sdl $ dpkg -S /usr/bin/sdl2-config
libsdl2-dev:arm64: /usr/bin/sdl2-config

Running it throws the error:

pi@raspberrypi:~/source/adamem_sdl $ sdl2-config --static-libs
/usr/bin/sdl2-config: 61: : Permission denied
/usr/lib//libSDL2.a -lm -lasound -lm -ldl -lpthread -lpulse-simple -lpulse -pthread -lsamplerate -lX11 -lXext -lXcursor -lXi -lXfixes -lXrandr -lXss -ldrm -lgbm -lwayland-egl -lwayland-client -lwayland-cursor -lxkbcommon -ldecor-0 -lpthread -lrt

Seems like a significant bug for that utility. I wonder if there's a work-around (rather than run as root)?

I appreciate your help with this as I'm a big fan of your emulator and wanted to get it going on the RPi5 (like it is on my RPi4 and RPi400).

Thank you!

[geoffdaddy]

That is very strange. Well, you should be able to cut-and-paste that line it spit out into the Makefile in place of the call to sdl2-config and it should work I would imagine. Glad to hear you like it and are making use of it. I haven't tried it on that new of a distribution of RPi linux or SDL2 but I have used it before when I had it working in SDL 1.2.

[mrgw454]

Adding the output from sdl2-config (also fixing the path to the libSDL2.a file) to the Makefile.SDL worked! I tried to search for anyone else with issues using the sdl2-config utility (from the latest 64 bit Raspberry Pi OS 12 Bookworm) but nothing has turned up so far. I have to imagine this issue will present itself soon since that is a common utility to use.

Here's the sed line I used to fix the Makefile.SDL:

sed -i 's|sdl2-config --static-libs|/usr/lib/aarch64-linux-gnu/libSDL2.a -lm -lasound -lm -ldl -lpthread -lpulse-simple -lpulse -pthread -lsamplerate -lX11 -lXext -lXcursor -lXi -lXfixes -lXrandr -lXss -ldrm -lgbm -lwayland-egl -lwayland-client -lwayland-cursor -lxkbcommon -ldecor-0 -lpthread -lrt|' Makefile.SDL

In any case, thank you so much again for all your help. I hope this information might be useful to anyone else using the same platform and OS version.

[geoffdaddy]

From what I've read of it, it's a script and not a binary, so maybe if you add a '-x' to the #!/bin/sh line at the beginning of the script it would provide some additional clues of what's going on... strange.