This is mainly for implementation convenience because the different execution modes have very different instruction encodings and semantics. What you may think of as a single architecture such as ARM may have several LLVM architectures such as regular ARM, Thumb and AArch64. By default, it is compiled to support all architectures. llc -version will give a list of all architectures it supports.However, for the sake of argument, let's say that you compiled both LLVM and Clang yourself or that you're otherwise happy to accept your LLVM binaries as good enough: This isn't all that helpful not just because these LLVM components might not be installed, but because of the vagaries of search paths and packaging systems, your llc and clang binaries may not correspond to the same version of LLVM. Clang is essentially just a C to LLVM translator, and it's LLVM itself that deals with the nitty-gritty of generating actual machine code, so it's not entirely surprising that Clang isn't paying much attention to the underlying architecture.Īs others have already noted, you can ask llc which architectures it supports. So far as I can tell, there is no command-line option to list which architectures a given clang binary supports, and even running strings on it doesn't really help.
It looks like Clang was not built with cross compiling in mind right away, but since it's llvm based it should be very cross-friendly in theory? thank you! If I SVN latest clang like this: svn co clang But how do I get the list of supported targets? And if my target it not supported on my distro(linux/windows/macos/whatever) how can I get the one that supports more platform? In clang world, it's only one binary (as I read on some forums). I found that clang is very different to gcc in respect to cross compiling, in GCC world you should have separate binary for everything, like PLATFORM_make or PLATFORM_ld (i*86-pc-cygwin i*86-*-linux-gnu etc. I know clang has -triplet parameter, but how can I list all possible values for it?
But I just want to know more about clang, since it feels to play important role in the years to come.Ĭlang -cc1 -help|grep arch|grep -v search
Currently I am interested in ARM in general and specifically iphone/android targets.
0 kommentar(er)
