search

littlekernel / lk

LK embedded kernel
MIT License
3.14k stars 615 forks source link

compile error #195

Open prime-zeng opened 7 years ago

prime-zeng commented 7 years ago

external/lib/heap/dlmalloc/dlmalloc.c: In function ‘mmap_resize’: external/lib/heap/dlmalloc/dlmalloc.c:1752:44: error: implicit declaration of function ‘mremap’ [-Werror=implicit-function-declaration]

define MREMAP_DEFAULT(addr, osz, nsz, mv) mremap((addr), (osz), (nsz), (mv))

ARCH_arm_TOOLCHAIN_PREFIX=arm-linux-gnueabihf- ./scripts/do-qemuarm

travisg commented 7 years ago

I've seen that one before, it's something to do with the linux toolchain setting some #defines that force the dlmalloc code into thinking it's compiling for linux. I can't debug it on this end, but the lines it's failing on is probably not supposed to be compiled.

Officially, LK is only supported building from a generic -elf or -eabi toolchain, specifically because of this sort of stuff. Using a linux toolchain tends to cause a lot of trouble, this is a classic example of it.

prime-zeng commented 7 years ago

I have just tried the eabi toolchain, and it works, thank you. By the way, i am new to LK, and i am want to study it , any suggestion about where to start from, is the LK comatible with the GP TEE?

egrimley-arm commented 4 years ago

For what it's worth, I was able to build with aarch64-linux-gnu-gcc by inserting #undef linux at the start of external/lib/heap/dlmalloc/dlmalloc.c. Since aarch64-linux-gnu-gcc is part of Debian and Ubuntu, using the wrong toolchain might be easier for some people. See also #121.

echoptic commented 1 year ago

I also had this issue while compiling for riscv64 using the compiler thats recommended in the getting started guide and adding #undef linux fixed the problem. Are you considering adding that fix?

travisg commented 1 year ago

In general it's kinda a mess for folks to use the linux toolchain with LK, but if it's a straightforward easy fix it's probably worth trying. Of course it then boils down to precisely which version of which toolchain, etc and it's a real pain to maintain. I can maybe give it a try though.

On Sat, Apr 29, 2023 at 6:24 AM echoptic @.***> wrote:

I also had this issue while compiling for riscv64 using the compiler thats recommended in the getting started guide and adding #undef linux fixed the problem. Are you considering adding that fix?

— Reply to this email directly, view it on GitHub https://github.com/littlekernel/lk/issues/195#issuecomment-1528788785, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAAX3LCB5TVITT6CPFYXS6LXDUI7RANCNFSM4DSGM4TA . You are receiving this because you commented.Message ID: @.***>