Date: Tue, 30 Jan 2024 09:14:22 -0800 From: Mark Millard <marklmi@yahoo.com> To: void <void@f-m.fm> Cc: freebsd-arm@freebsd.org Subject: Re: arm64 system clang & llvm Message-ID: <C99B0C38-4C63-4B54-BAE8-9B63BC619733@yahoo.com> In-Reply-To: <ZbkdblJeoPagKgz9@int21h> References: <ZbkdblJeoPagKgz9@int21h>
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On Jan 30, 2024, at 08:01, void <void@f-m.fm> wrote: > context is main-n267804 arm64 >=20 > I'd like to avoid building base compilers for arches I'll never use. > I want aarch64 *only* >=20 > To achieve this, there's the following in /etc/src.conf >=20 > ### > # LLVM > WITHOUT_LLVM_TARGET_ALL=3D > WITH_LLVM_TARGET_AARCH64=3D > WITHOUT_LLVM_TARGET_ARM=3D > WITHOUT_LLVM_ASSERTIONS=3D >=20 > But looking at buildworld output, I see what *looks* like building for = other arches happening. Is this the case, or am I reading it wrong, or > is the src.conf wrong? FYI: On aarch64, for non-debug builds I use: #Disables avoiding bootstrap: WITHOUT_LLVM_TARGET_ALL=3D WITH_LLVM_TARGET_AARCH64=3D WITH_LLVM_TARGET_ARM=3D WITHOUT_LLVM_TARGET_MIPS=3D WITHOUT_LLVM_TARGET_POWERPC=3D WITHOUT_LLVM_TARGET_RISCV=3D WITHOUT_LLVM_TARGET_X86=3D MALLOC_PRODUCTION=3D WITH_MALLOC_PRODUCTION=3D WITHOUT_ASSERT_DEBUG=3D WITHOUT_LLVM_ASSERTIONS=3D (I've not validated the comment in a very long time. There used to be the odd side effect on when bootstrap builds happened.) As FreeBSD main [so: 15] has lib32 support by default these days, does your aarch64 hardware support AArch32/armv7 code, at least for EL0? Most of the hardware around probabaly does. Having WITH_LLVM_TARGET_AARCH64=3D may override any attempt to disable code generation for the likely hardware-supported type of code. But, if it is possible to have aarch64 disable armv7 code generation, you would also need: WITHOUT_LIB32=3D Otherwise, you would be asking for armv7 code generation to be done in order to build lib32. (Since AARch32/armv7 also supports armv6, that is likely also involved. But I keep the wording generally simpler.) =3D=3D=3D Mark Millard marklmi at yahoo.com
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