What is the difference between clang (and LLVM) and gcc / g++?
2014年7月19日 · Clang converts C/C++/etc to LLVM IR, LLVM performs optimizations on the IR, and the LLVM x86 backend writes out x86 machine code for execution. Despite the name, …
How do I compile C++ with Clang? - Stack Overflow
2018年2月25日 · clang++ test.cc -o test will compile successfully, but clang -x c++ will not, showing a lot of undefined reference errors. So I guess they are not exactly equivalent. It is …
using Clang in windows 10 for C/C++ - Stack Overflow
2020年9月16日 · Install Clang using Visual Studio Installer. (1) Open 'Visual Studio Installer'. (2) Visual Studio Community 2022 -> click 'Modify' (3) In the [Installation details] checkbox list, …
Complete list of Clang flags - Stack Overflow
2020年12月31日 · You can see at the Clang - FAQ that clang -cc1 is the frontend. clang is the GCC-compatible driver. And recently, a new driver has appeared, clang-cl, which is a CL …
How run clang from command line on Windows? - Stack Overflow
With Clang for Windows 5.0.0 (64 Bit) (latest versions available here; you want LLVM-x.y.z-win64.exe) and Visual Studio 2017 Community Edition or Build Tools installed in their default …
Clang optimization levels - Stack Overflow
clang adds: -vectorize-loops -vectorize-slp-O3 is based on -O2. opt adds: -argpromotion-Ofast is based on -O3, valid in clang but not in opt. clang adds: -fno-signed-zeros -freciprocal-math -ffp …
g++ - How can I find the default version of the c++ language …
2023年3月9日 · Defaults for Clang. See its documentation, which at the time of this writing states (emphasis added): By default, Clang 16 or later builds C++ code according to the C++17 …
In clang, how do you use per-function optimization attributes?
2014年10月9日 · As clang documentation says, Clang supports GCC’s gnu attribute namespace. All GCC attributes which are accepted with the __attribute__((foo)) syntax are also accepted …
c++ - Using OpenMP with clang - Stack Overflow
2015年10月27日 · Building the latest trunk of LLVM/Clang (clang-3.8), installing libiomp5, and specifying the location of the gomp omp header files worked. Note that the Ubuntu package for …
c++ - Loop unrolling in clang - Stack Overflow
-unroll-count=4 has a higher priority than #pragma clang loop unroll_count(2). That's why it ends up unroll it by 4. Meaning the compiler is following the unroll-count command line option NOT …