Messages in this thread | | | Date | Tue, 14 Aug 2018 10:09:04 -0700 | From | Guenter Roeck <> | Subject | Build failures with gcc 4.5 and older |
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Hi,
Since commit c1a2f7f0c0645 ("mm: Allocate the mm_cpumask (mm->cpu_bitmap[]) dynamically based on nr_cpu_ids"), building the Linux kernel with gcc version 4.5 and older fails as follows.
In file included from ./include/linux/mm.h:17:0, from ./include/linux/pid_namespace.h:7, from ./include/linux/ptrace.h:10, from arch/openrisc/kernel/asm-offsets.c:32: ./include/linux/mm_types.h:497:16: error: flexible array member in otherwise empty struct
This is just an example with gcc 4.5.1 for or32. I have seen the problem with gcc 4.4 (for unicore32) as well.
Does that mean that gcc 4.5 and older are now officially no longer supported for compiling the kernel ?
If so, would it make sense to update include/linux/compiler-gcc.h accordingly ?
Thanks, Guenter
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