On Fri, Dec 31, 2021 at 07:55:51AM +0000, cgel.zte@xxxxxxxxx wrote: > From: xu xin <xu.xin16@xxxxxxxxxx> > > 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@xxxxxxxxxx> > --- > 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 >
