Date: Sat, 30 Oct 2021 10:53:31 +0000 From: Chunlin Zhu <simon_0214@...mail.com> To: "musl@...ts.openwall.com" <musl@...ts.openwall.com> Subject: Re: Failed to build musl 1.2.2 by using clang cross compiler Hello, I made a change to the Makefile of musl 1.2.2 at line 162, just remove the CFLAGS_ALL. [cid:2dca1e1f-1f39-4eed-bd01-3a2e4eabe70f] Note: The reason why I remove the CFLAGS_ALL, because I find on my computer when "clang --target=aarch64 -fuse-ld=/usr/local/bin/ld.lld -Wl,....." is used, gcc linker will be invoked, but when --target=aarch64 is removed, ld.lld will be invoked as expect. Since CFLAGS_ALL contains the option --target=aarch64, so I modify the Makefile. And use the below configuration: ./configure CC=clang --target=aarch64 CFLAGS="--target=aarch64 --rtlib=compiler-rt" AR=/usr/local/bin/llvm-ar LDFLAGS="-fuse-ld=/usr/local/bin/ld.lld -Wl,-z,noexecstack -m elf64-littleaarch64" RANLIB=/usr/local/bin/llvm-ranlib LIBCC= --syslibdir=/usr/local/lib Then ld.lld is invoked but still report the below error, does anyone have encounter the same problem? [cid:b4dacdde-8d7d-424d-a30a-197c7c38aeaf] Thanks, Simon ________________________________ From: Jeffrey Walton <noloader@...il.com> Sent: Saturday, October 30, 2021 12:25 To: musl@...ts.openwall.com <musl@...ts.openwall.com> Subject: Re: [musl] Failed to build musl 1.2.2 by using clang cross compiler On Fri, Oct 29, 2021 at 11:46 PM Chunlin Zhu <simon_0214@...mail.com<mailto:simon_0214@...mail.com>> wrote: Hello, On my computer I have built and install the llvm toolchain from the source code by using the below configuration, the llvm lib is installed in the /usr/local/lib folder. cmake -S llvm -B build -G "Unix Makefiles" -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;libcxx;libcxxabi;compiler-rt;lld" -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="ARM;X86;AArch64" And I am trying to build musl libc 1.2.2 for aarch64 by using llvm/clang, and I use the below configure: ./configure CC=clang --target=aarch64 CFLAGS="-v --target=aarch64 --rtlib=compiler-rt" AR=/usr/local/bin/llvm-ar RANLIB=/usr/local/bin/llvm-ranlib LIBCC=-lcompiler_rt --syslibdir=/usr/local/lib It report the error as below: [cid:ef74a00d-14e8-4a0a-b304-d1d3f4cb73f7] And I find the compile phase is OK, the problem occurs during the link phase, I don't understand why finally gcc is invoked. [cid:17ccf705cf7cb971f163] By the way, the below configure works on my computer: ./configure CC=clang make -j4 Set LD to clang, too. It sounds like GCC is creeping in because it is a default. For the link error with --noexecstack, the linker needs -z,noexecstack. So add -Wl,-z,noexecstack to LDFLAGS. See the ld(1) man page at https://www.man7.org/linux/man-pages/man1/ld.1.html. ASFLAGS should continue to use --noexecstack. Jeff Content of type "text/html" skipped Download attachment "image.png" of type "image/png" (236690 bytes) Download attachment "image.png" of type "image/png" (14293 bytes) Download attachment "image.png" of type "image/png" (192618 bytes)
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.