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patjak / facetimehd

Reverse engineered Linux driver for the FacetimeHD (Broadcom 1570) PCIe webcam
GNU General Public License v2.0
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bcwc-pcie fails to build with latest GCC #248

Open ohell opened 3 years ago

ohell commented 3 years ago

webcam stopped working after updating to kernel 5.9.9. So I tried to do a fresh install of bcwc-pcie-git. Get an error, only for the new kernel version:

==> dkms install --no-depmod -m bcwc-pcie -v 0.5.7.r1.gf85a604 -k 4.19.204-1-MANJARO ==> dkms install --no-depmod -m bcwc-pcie -v 0.5.7.r1.gf85a604 -k 5.9.9-arch1-1-macbook Error! Bad return status for module build on kernel: 5.9.9-arch1-1-macbook (x86_64) Consult /var/lib/dkms/bcwc-pcie/0.5.7.r1.gf85a604/build/make.log for more information. ==> Warning, `dkms install --no-depmod -m bcwc-pcie -v 0.5.7.r1.gf85a604 -k 5.9.9-arch1-1-macbook' returned 10

Looking at the log file, it seems package needs to be updated for newer libraries included with gcc? Also, I would be grateful if you can suggest a workaround (i.e. iis to possible to build using clang? what commands would be needed?)

make[1]: Waiting for unfinished jobs.... make[1]: [scripts/Makefile.build:283: /var/lib/dkms/bcwc-pcie/0.5.7.r1.gf85a604/build/fthd_hw.o] Error 1 cc1: error: incompatible gcc/plugin versions cc1: error: failed to initialize plugin ./scripts/gcc-plugins/structleak_plugin.so make[1]: [scripts/Makefile.build:283: /var/lib/dkms/bcwc-pcie/0.5.7.r1.gf85a604/build/fthd_drv.o] Error 1 cc1: error: incompatible gcc/plugin versions cc1: error: failed to initialize plugin ./scripts/gcc-plugins/structleak_plugin.so make[1]: [scripts/Makefile.build:283: /var/lib/dkms/bcwc-pcie/0.5.7.r1.gf85a604/build/fthd_ringbuf.o] Error 1 make: *** [Makefile:1784: /var/lib/dkms/bcwc-pcie/0.5.7.r1.gf85a604/build] Error 2 make: Leaving directory '/usr/lib/modules/5.9.9-arch1-1-macbook/build'

alexshpilkin commented 3 years ago

Not the author, but it seems unlikely to me that this is a problem with this driver. These GCC messages indicate that you have link-time optimization (LTO) on, but some of the objects in the link have been by a different version of GCC than you have installed at the time of the link. Try nuking your build directories, maybe? (Why are you trying to build a kernel module with LTO anyway? Even for normal packages that’s not necessarily a good idea, and I don’t think the default makepkg configuration does it.)

ohell commented 3 years ago

I did a clean build after the first time install failed. The errors are from that process. and I have not set anything explicitly about LTO. I just run yay bcwc-pcie and choose the option for clean build when asked.