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gpsp / lr-gpsp - use gcc-6 to workaround segfault with gcc-8 on buster

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lr-gpsp:

cpu_threaded.c built with -O2 on gcc 8 produces a non working binary. This source already had
a different optimisation level from the rest of the code (O2 vs O3). However, on gcc-8 it causes
a non working binary when built with anything other than O0, but this could have some performance
issues (would need testing on a rpi1).

I compared all the different optimisation flags enabled by O1 and also with any changes from gcc-6,
but not all GCC optimisations are controllable from flags. It was not possible to produce a working
binary with O1 - even disabling all the configurable optimisations enabled by O1.

The issue is most likely undefined behaviour in this file (which has a lot of large macros), and it
probably needs some fixes. However it could be a bug in the gcc-8 optimiser code.

As the issue isn't present with gcc-6, and as gcc-6 is available on Debian buster, the easiest
workaround is to just force the code to be build with gcc-6.

Also adjusted the makefile to pass parameters for the make clean, as some platform specific objects
are not removed otherwise.

gpsp:

Forced gcc-6 as with lr-gpsp.

Simplified the module flags to just include videocore platforms.
This commit is contained in:
Jools Wills 2020-07-21 02:51:45 +01:00
parent 8dec4ccd7c
commit 3456036c17
2 changed files with 9 additions and 5 deletions
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6
scriptmodules/emulators/gpsp.sh
View file

@ -14,10 +14,10 @@ rp_module_desc="GameBoy Advance emulator"
rp_module_help="ROM Extensions: .gba .zip\n\nCopy your Game Boy Advance roms to $romdir/gba\n\nCopy the required BIOS file gba_bios.bin to $biosdir"
rp_module_licence="GPL2 https://raw.githubusercontent.com/gizmo98/gpsp/master/COPYING.DOC"
rp_module_section="opt"
rp_module_flags="noinstclean !all arm !mali !kms"
rp_module_flags="noinstclean !all videocore"
function depends_gpsp() {
getDepends libsdl1.2-dev libraspberrypi-dev
getDepends libsdl1.2-dev libraspberrypi-dev gcc-6
}
function sources_gpsp() {
@ -28,7 +28,7 @@ function build_gpsp() {
cd raspberrypi
rpSwap on 512
make clean
make
make CC="gcc-6"
rpSwap off
md_ret_require="$md_build/raspberrypi/gpsp"
}

8
scriptmodules/libretrocores/lr-gpsp.sh
View file

@ -16,16 +16,20 @@ rp_module_licence="GPL2 https://raw.githubusercontent.com/libretro/gpsp/master/C
rp_module_section="opt arm=main"
rp_module_flags="!all arm"
function depends_lr-gpsp() {
getDepends gcc-6
}
function sources_lr-gpsp() {
gitPullOrClone "$md_build" https://github.com/libretro/gpsp.git
}
function build_lr-gpsp() {
make clean
rpSwap on 512
local params=()
isPlatform "arm" && params+=(platform=armv)
make "${params[@]}"
make "${params[@]}" clean
CC="gcc-6" make "${params[@]}"
rpSwap off
md_ret_require="$md_build/gpsp_libretro.so"
}