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Hi Andrew, |
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On Thu, 16 Dec 2021, Andrew Savchenko <bircoph@g.o> wrote: |
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> On Thu, 16 Dec 2021 03:32:10 +0300 Andrew Savchenko wrote: |
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>> On Wed, 15 Dec 2021 16:58:26 +0200 Adrian Ratiu wrote: |
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>> > Starting with kernel>=v5.7 the build system can override the |
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>> > tools vars by setting LLVM=1 [1], but older kernels still use |
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>> > the default GNU tools, so to be able to use a full LLVM/Clang |
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>> > build, CC should be set together with AR to the portage set |
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>> > values. Doing this avoids situations like building the |
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>> > kernel with clang (using the set HOSTCC) but using gcc/gnu-ar |
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>> > for headers. [1] a0d1c951ef08 kbuild: support LLVM=1 to |
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>> > switch the default tools to Clang/LLVM Co-authored-by: Manoj |
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>> > Gupta <manojgupta@××××××××.org> Signed-off-by: Adrian Ratiu |
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>> > <adrian.ratiu@×××××××××.com> --- |
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>> > eclass/kernel-2.eclass | 2 +- 1 file changed, 1 |
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>> > insertion(+), 1 deletion(-) |
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>> > diff --git a/eclass/kernel-2.eclass b/eclass/kernel-2.eclass |
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>> > index adc1425bc2e..caeec86ff59 100644 --- |
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>> > a/eclass/kernel-2.eclass +++ b/eclass/kernel-2.eclass @@ |
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>> > -692,7 +692,7 @@ env_setup_xmakeopts() { |
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>> > elif type -p ${CHOST}-ar >/dev/null; then |
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>> > xmakeopts="${xmakeopts} CROSS_COMPILE=${CHOST}-" fi |
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>> > - xmakeopts="${xmakeopts} HOSTCC=$(tc-getBUILD_CC)" + |
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>> > xmakeopts="${xmakeopts} HOSTCC=$(tc-getBUILD_CC) |
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>> > CC=$(tc-getCC) AR=$(tc-getAR)" |
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>> OBJDUMP should be exported as well (e.g. used by |
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>> scripts/Makefile.build) |
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> |
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> And LD as well. |
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> |
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Thank you very much for the suggestions! |
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I only set CC and AR because there were the two which failed in my |
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testing, but yes, it is a good idea to be prudent and set them all |
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if nobody is oopposed to it. |
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I will leave this patch on the ML a bit in case there is more |
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feedback (it is also EoY season so people might be busy), then I |
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will send a v3 with the new variables included. |
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Thanks again, |
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Adrian |
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>> > export xmakeopts |
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>> > } |
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>> > |
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>> |
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>> |
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>> Best regards, |
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>> Andrew Savchenko |
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> |
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> |
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> Best regards, |
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> Andrew Savchenko |
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