[clang][driver] Correcting arguments when using `libFuzzer` with `-shared-libsan` (#164842)
This PR contains two commits:
- Add required dependencies when using `-shared-libsan` and fuzzer.
Since libFuzzer is a static library we need to make sure that we add its
dependencies when building with `-shared-libsan`. E.g libFuzzer uses
`ceilf()` from `libm.so` when building on Gnu toolchain.
Previously, the resulting command did not contain the required link
libraries, giving build failures
(only a static sanitizer runtime would trigger the call to
`linkSanitizerRuntimeDeps`).
- Correcting dependency order when using fuzzer.
When building using `-shared-libsan` the sanitizer library needs to be
first in link order.
Since the fuzzer requires `-lstdc++` we have to make sure that the
sanitizer library is added before `-lstdc++`.
---------
Signed-off-by: Björn Svensson <bjorn.a.svensson@est.tech>Welcome to the LLVM project!
This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.
Other components include: the libc++ C++ standard library, the LLD linker, and more.
Consult the Getting Started with LLVM page for information on building and running LLVM.
For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.
Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.
The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.