Date: Wed, 08 Sep 2021 09:29:25 +0000 From: bugzilla-noreply@freebsd.org To: toolchain@FreeBSD.org Subject: [Bug 258358] Fails to build on riscv: arm_bf16.h: sh: clang-tblgen: Exec format error Message-ID: <bug-258358-29464-EOy5S6pc1k@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-258358-29464@https.bugs.freebsd.org/bugzilla/> References: <bug-258358-29464@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D258358 --- Comment #4 from Jessica Clarke <jrtc27@freebsd.org> --- This is a known issue. We build the bootstrap tool as a static binary and w= ith --gc-sections. The latter is key, as ELF notes are not considered as GC roo= ts when COMDAT, as was made the case last year for the ABI note. Because RISC-V isn=E2=80=99t using EI_OSABI on FreeBSD there=E2=80=99s then no branding in= the binary for the kernel to recognise (you need at least one of that, the dynamic linker path= or the ELF note). The fix for this is to stop making the note COMDAT and put it only in crti. There is a workaround. Find the -Wl,--gc-sections (IIRC it=E2=80=99s in usr.bin/clang/llvm.build.mk) and add ,-melf64lriscv_fbsd to the end of it. --=20 You are receiving this mail because: You are on the CC list for the bug. You are the assignee for the bug.=
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