Category Archives: gcc

Kernel – GCC 13 Plugins fail – and Fix..

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Fedora 38 (beta..) has GCC 13, and this causes an error when compiling the kernel with ‘gcc_plugins‘ selected: …………………. CC scripts/mod/devicetable-offsets.s cc1: error: cannot load plugin ./scripts/gcc-plugins/randomize_layout_plugin.so: ./scripts/gcc-plugins/randomize_layout_plugin.so: undefined symbol: tree_code_type make[1]: *** [scripts/Makefile.build:252: scripts/mod/empty.o] Error 1 make[1]: *** Waiting for unfinished jobs…. cc1: error: cannot load plugin ./scripts/gcc-plugins/randomize_layout_plugin.so: ./scripts/gcc-plugins/randomize_layout_plugin.so: undefined symbol: tree_code_type make[1]: *** [scripts/Makefile.build:114: scripts/mod/devicetable-offsets.s] … Continue reading →

Compiler – Fun with CLANG – Kernel, NVIDIA, and VMware…

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I have been carrying out some preliminary tests to see how feasible it is to compile the Linux Kernel, and NVIDIA drivers, and VMware, using the ‘alternative’ to GCC – CLANG.. The kernel compile is relatively easy, and well documented: # make CC=clang HOSTCC=clang -j8 (for a 4-core system) The compile seems to be slower than GCC, … Continue reading →

NVIDIA – Updated 440.59 Patch for 5.6-rc3

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There is an updated patch for NVIDIA 440-59 with Kernel 5.3, which includes the Y2038 fixes, at https://gitlab.com/snippets/1937313 This compiles with GCC10 now, and I have briefly tested it on my Fedora32 system, with KDE/Plasma and VMware, and it seems to be working OK. Robert Gadsdon.   February 25th 2020. … Continue reading →

NVIDIA – Extra 440.59 Patch for 5.6-rc3 – With a Gotcha..

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Thanks to Isaak I. Aleksandrov, there is now an additional patch for NVIDIA driver 440.59 to accommodate the Y2038 changes in Kernel 5.6-rc3.   This should be applied after the original 5.6-rc1 patch ( https://gitlab.com/snippets/1937313 ), and can be found here:  https://gitlab.com/snippets/1944237 I have tested this, and it compiles OK with GCC9 (current distros) but fails with GCC10 … Continue reading →

GCC – Fun with GCC 10, and the Kernel, NVIDIA, VMware..

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I have updated some test systems (x86_64 and aarch64) to pre-beta Fedora 32, which now includes GCC 10: $ gcc –version gcc (GCC) 10.0.1 20200216 (Red Hat 10.0.1-0.8) There have been a couple of problems with kernel compilation, but in each case there was already a patch/workaround available.. https://www.spinics.net/linux/fedora/fedora-arm/msg13193.html and https://lkml.org/lkml/2020/1/29/494 The most serious problem was a … Continue reading →

Compiler – GCC 9 – First Impressions..

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Just updated to the pre-release Fedora 30 (Rawhide) on the test system, and tried out the new version of GCC: $ gcc –version gcc (GCC) 9.0.1 20190209 (Red Hat 9.0.1-0.4) Kernel 5.0-rc7 compiled successfully, and runs OK.    As expected, there were quite a lot of compiler ‘warnings’: ………………….. CC net/ipv4/proc.o CC drivers/hid/hid-samsung.o CC net/ipv4/fib_rules.o CC drivers/hid/hid-sunplus.o fs/xfs/xfs_ioctl32.c: … Continue reading →

Fedora – F28 Annoyances, and Workarounds..

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Running Fedora 28 on the test system, I have encountered the following issues with various applications, and found substitute rpm workarounds..  Usually, these can be installed by downloading them ,and then using # rpm -Uvh……… –force.. Grub-customizer still crashes, but the F27 version works ( grub-customizer-5.0.6-6.fc27.x86_64 ) Wine crashes with some windows apps, and the workaround is … Continue reading →

Kernel – 4.17-rc6 Out – Includes GCC8 Compile Fixes..

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Kernel 4.17-rc6 has been released, and details of changes since -rc5 are here:  http://lkml.iu.edu/hypermail/linux/kernel/1805.2/03965.html This version is still OK with the latest VMware (14.1.1) and NVIDIA (396.24) drivers, but also includes fixes for repeated GCC8 / objtool warnings at compile time: ………………. Josh Poimboeuf (5): ………. objtool: Support GCC 8’s cold subfunctions objtool: Support GCC 8 switch … Continue reading →

Kernel – 4.17-rc6 Out – Includes GCC8 Compile Fixes..

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Kernel 4.17-rc6 has been released, and details of changes since -rc5 are here:  http://lkml.iu.edu/hypermail/linux/kernel/1805.2/03965.html This version is still OK with the latest VMware (14.1.1) and NVIDIA (396.24) drivers, but also includes fixes for repeated GCC8 / objtool warnings at compile time: ………………. Josh Poimboeuf (5): ………. objtool: Support GCC 8’s cold subfunctions objtool: Support GCC 8 switch … Continue reading →

Kernel – GCC8 / ‘Objtool Warnings’ Patches..

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There are now patches available to deal with the host of ‘objtool‘ warnings when compiling the kernel with GCC8: …………………………….. drivers/video/fbdev/core/fbmem.o: warning: objtool: fb_set_var()+0x209: sibling call from callable instruction with modified stack frame drivers/video/fbdev/core/fbmem.o: warning: objtool: do_remove_conflicting_framebuffers()+0xa6: sibling call from callable instruction with modified stack frame drivers/video/fbdev/core/fbmem.o: warning: objtool: register_framebuffer()+0x14b: sibling call from callable instruction with modified … Continue reading →