qemuafl does not build with meson 0.57 and later about qemuafl

[vanhauser-thc]

you have to report this upstream to qemu itself, the meson setup is by them. until this is fixed and we then update from qemu you will have to install an older version or find a workaround.

@kotee4ko do not post your issues to completely different items!

[kotee4ko]

Can approve it.

Program scripts/decodetree.py found: YES (/usr/bin/python3 /opt/wokr/FUZZING/AFLplusplus/qemu_mode/qemuafl/scripts/decodetree.py)
Program @INPUT@ found: NO

../target/hexagon/meson.build:33:0: ERROR: Program '@INPUT@' not found

A full log can be found at /opt/wokr/FUZZING/AFLplusplus/qemu_mode/qemuafl/build/meson-logs/meson-log.txt

ERROR: meson setup failed

meson --version
0.58.999

[mleithner]

Since this is still present in the current version, here's a rather simple workaround based on the patches pointed out by @bennofs:

1. Run build_qemu_support.sh until it fails with the Program '@INPUT@' not found error above. I'm assuming you're now in the qemu_mode folder of AFLplusplus.
2. cd qemuafl
3. curl 'https://pastebin.com/raw/i4xw9uNM' | tr -d '\r' > qemu-meson-workaround.patch (this is just a merged version of the two commits; if you'd rather not trust me, manually merge them)
4. patch -p1 < qemu-meson-workaround.patch
5. cd ..
6. NO_CHECKOUT=1 ./build_qemu_support.sh

The NO_CHECKOUT flag must be set to any nonempty string. Otherwise, build_qemu_support.sh will simply checkout qemuafl again, immediately overwriting your patch.
Tested (compiles, not tested if it works) on a6758d1.