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2015 Nov 06
2
How does -fPIE get passed from clang to llc when run on a .ll file?
..."clang-3.6" -cc1 -triple xstg--linux-elf -emit-llvm -disable-free
-main-file-name global_dat.c -mrelocation-model pic -pic-level 2 -pie-level
2 ...
So if I were to pass this .ll file (global_dat_x86_pie.ll) to llc how would
llc know that the PIE Level is 2? Is this an oversight, bug, or expetcted
behaviour with a different workaround?
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2015 Nov 06
2
How does -fPIE get passed from clang to llc when run on a .ll file?
...ver at gmail.com>
wrote:
> On 6 November 2015 at 10:32, Phil Tomson via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> > So if I were to pass this .ll file (global_dat_x86_pie.ll) to llc how
> would
> > llc know that the PIE Level is 2? Is this an oversight, bug, or expetcted
> > behaviour with a different workaround?
>
> It looks like it's the "-enable-pie" command line option, which gets
> hooked up to TargetOptions::PositionIndependentExecutable if you're
> doing it programmatically. I'm not sure of the history behind why
>...