Unable to compile with instrumentation since recent commit about blst HOT 2 CLOSED

This ought to be the additional linker step, ld -r, that inadvertently introduces duplicate code, which triggers the "multiple definition" errors. Normally -nostdlib prevents compiler driver from adding any library, but it apparently doesn't prevent clang from throwing in libclang_rt.ubsan_standalone. The -r step is quite "mechanical" and it should be possible to simply omit all CFLAGS when you perform it. Well, this will break certain kinds of cross-compilations...

While I think about it, could you try following? Just open ./build.sh in text editor and remove ${CFLAGS} from the line 87. Does it do the trick?

from blst.

I've chosen to simply see if there is -fsanitinze in CFLAGS and bypass symbol privatization.

Just in case for reference. One doesn't want to switch to ${LD}, because there might be significant options on compiler command line such as -target. This is also the reason for why one can't just omit CFLAGS in general case.

Formally speaking, one can argue that -r should prevent compiler driver from adding any library. But such suggestion is unlikely to fly, too much legacy already. But one should be able to at least argue that -nostdlib should prevent clang from throwing in the libclang_rt.ubsan_standalone.

from blst.