Has anyone enabled the libLTO when compiling the FreeBSD kernel(in order to compute a whole-program call graph). I want to compile the FreeBSD kernel using the libTO tool from the llvm/clang compiler suite. If anyone has previously done this work then can anyone show me how it is done or how to proceed to do it?
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Wiki page called Building FreeBSD with Clang has a section regarding this. According to it, it's possible to perform LTO on kernel and get bootable binary. The page itself is somewhat old though, for example you don't need setenv CC clang step anymore, so your mileage may wary.
arrowd
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I did see that page but I am not able to build the libLLVMgold.so. Also this page is somewhat ambiguous as the steps defined in that tutorial were perfomed on i386 only. – matrixaliser May 28 '15 at 21:59
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also there are very few available resources on the internet on running things on FreeBSD. – matrixaliser May 28 '15 at 21:59
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If you want to get help, post exact errors that prevent you from building. – arrowd Jun 01 '15 at 07:28