lkml.org 
[lkml]   [2021]   [Dec]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH] Fix compilation errors when using special directory
On Fri, Dec 31, 2021 at 07:55:51AM +0000, cgel.zte@gmail.com wrote:
> From: xu xin <xu.xin16@zte.com.cn>
>
> When we compile the kernel with cross compilers, if CROSS_COMPILE is
> specified by the path containing special directory like '~', some
> compilation error will occurs.
>
> Here's an example:
>
> $ make ARCH=x86_64
> CROSS_COMPILE=~/x86_64_gcc9.2.0_glibc2.31.0/bin/x86_64-pc-linux-gnu- all
>
> error:./scripts/mkcompile_h: line 64:
> ~/x86_64_gcc9.2.0_glibc2.31.0/bin/x86_64-pc-linux-gnu-ld: No such file or
> directory
>
> Since there are many other similar scripts using these variables, in
> order to solve the problem from the source, add realpath in makefile to
> turn these variables into absolute paths.

This is not going to work for the traditional approach of CROSS_COMPILE
being just a triple, rather than a full path plus a triple, because

$(realpath $(CROSS_COMPILE))

is going to evaluate to nothing in that case:

$ make -skj"$(nproc)" ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig all
warning: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
ld: unrecognised emulation mode: aarch64linux
Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 elf_iamcu elf_l1om elf_k1om i386pep i386pe
make[2]: *** [arch/arm64/kernel/vdso/Makefile:57: arch/arm64/kernel/vdso/vdso.so.dbg] Error 1
...

Why not just change '~' to '$HOME' in your build scripts so that it is
evaluated before the make command begins?

> Signed-off-by: xu xin <xu.xin16@zte.com.cn>
> ---
> Makefile | 16 ++++++++--------
> 1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index fe5a4d8e4ac5..cdbb747787ac 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -459,14 +459,14 @@ OBJDUMP = llvm-objdump
> READELF = llvm-readelf
> STRIP = llvm-strip
> else
> -CC = $(CROSS_COMPILE)gcc
> -LD = $(CROSS_COMPILE)ld
> -AR = $(CROSS_COMPILE)ar
> -NM = $(CROSS_COMPILE)nm
> -OBJCOPY = $(CROSS_COMPILE)objcopy
> -OBJDUMP = $(CROSS_COMPILE)objdump
> -READELF = $(CROSS_COMPILE)readelf
> -STRIP = $(CROSS_COMPILE)strip
> +CC = $(realpath $(CROSS_COMPILE))gcc
> +LD = $(realpath $(CROSS_COMPILE))ld
> +AR = $(realpath $(CROSS_COMPILE))ar
> +NM = $(realpath $(CROSS_COMPILE))nm
> +OBJCOPY = $(realpath $(CROSS_COMPILE))objcopy
> +OBJDUMP = $(realpath $(CROSS_COMPILE))objdump
> +READELF = $(realpath $(CROSS_COMPILE))readelf
> +STRIP = $(realpath $(CROSS_COMPILE))strip
> endif
> RUSTC = rustc
> RUSTDOC = rustdoc
> --
> 2.25.1
>

\
 
 \ /
  Last update: 2021-12-31 18:06    [W:0.045 / U:0.848 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site