[LLVMdev] Setting TARGET_LLCFLAGS in the environment

[Jakob Stoklund Olesen]

Weird issue beyond my make-fu:

When running the test-suite, this works fine:

make TARGET_LLCFLAGS='-mcpu=cortex-a8 -mattr=+thumb2' TEST=nightly report

But this fails:

export TARGET_LLCFLAGS='-mcpu=cortex-a8 -mattr=+thumb2'
make TEST=nightly report

It looks like the following line from Makefile.rules is executed multiple times:

TARGET_LLCFLAGS += -relocation-model=pic -disable-fp-elim

This causes llc to complain about the -relocation-model and -disable-fp-elim options being given multiple times. (Sometime they are repeated three or four times).

Clearly there is some make magic I don't understand here. Does anyone know what is going on?