mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-25 08:16:05 +00:00
28bd84f55f
Authored By: joshua-arch1 (Jun Sha) Reviewed By: shiva0217, apazos, luismarques, asb, jrtc27, MaskRay Reviewers: MaskRay, jrtc27 Differential Revision: https://reviews.llvm.org/D131230 This patch is to fix an issue about module linking with LTO. When compiling with PIE, the small data limitation needs to be consistent with that in PIC, otherwise there will be linking errors due to conflicting values. bar.c int bar() { return 1; } foo.c int foo() { return 1; } clang --target=riscv64-unknown-linux-gnu -flto -c foo.c -o foo.o -fPIE clang --target=riscv64-unknown-linux-gnu -flto -c bar.c -o bar.o -fPIC clang --target=riscv64-unknown-linux-gnu -flto foo.o bar.o -flto -nostdlib -v -fuse-ld=lld ld.lld: error: linking module flags 'SmallDataLimit': IDs have conflicting values in 'bar.o' and 'ld-temp.o' clang-15: error: linker command failed with exit code 1 (use -v to see invocation) What we are trying to do here is to use Min instead of Error for conflicting SmallDataLimit when combining -fno-PIC code with -fPIC code. Signed-off-by: xiaojing.zhang <xiaojing.zhang@xcalibyte.com> Signed-off-by: jianxin.lai <jianxin.lai@xcalibyte.com>
//===----------------------------------------------------------------------===// // C Language Family Front-end //===----------------------------------------------------------------------===// Welcome to Clang. This is a compiler front-end for the C family of languages (C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM compiler infrastructure project. Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer. If you're interested in more (including how to build Clang) it is best to read the relevant web sites. Here are some pointers: Information on Clang: http://clang.llvm.org/ Building and using Clang: http://clang.llvm.org/get_started.html Clang Static Analyzer: http://clang-analyzer.llvm.org/ Information on the LLVM project: http://llvm.org/ If you have questions or comments about Clang, a great place to discuss them is on the Clang forums: https://discourse.llvm.org/c/clang/ If you find a bug in Clang, please file it in the LLVM bug tracker: http://llvm.org/bugs/