On Thu, Oct 28, 2021 at 11:07:40PM +0900, Masahiro Yamada wrote: > On Thu, Oct 28, 2021 at 10:44 PM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > > > Hi, > > > > Debian (and derived) distros ship their compilers as -$ver suffixed > > binaries. For gcc it is sufficent to use: > > > > $ make CC=gcc-12 > > > > However, clang builds (esp. clang-lto) need a whole array of tools to be > > exactly right, leading to unweildy stuff like: > > > > $ make CC=clang-13 LD=ld.lld=14 AR=llvm-ar-13 NM=llvm-nm-13 OBJCOPY=llvm-objcopy-13 OBJDUMP=llvm-objdump-13 READELF=llvm-readelf-13 STRIP=llvm-strip-13 LLVM=1 > > > > which is, quite franktly, totally insane and unusable. Instead use the > > already mandatory LLVM variable to convey this, enabling one such as > > myself to use: > > > > $ make LLVM=-13 > > > > This also lets one quickly test different clang versions. > > > Please read the commit log of > a0d1c951ef08ed24f35129267e3595d86f57f5d3 That's yuck, I like LLVM=-13 or LLVM=-12 much better to select between compilers. Means I don't have to remember wth they live and or wreck PATH.
