https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88185
Bug ID: 88185
Summary: LTO merges -fPIC/fpie and -fPIE/-fpie options to
nothing - fails to warn when both are specified
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: danglin at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Host: hppa-unknown-linux-gnu
Target: hppa-unknown-linux-gnu
Build: hppa-unknown-linux-gnu
The systemd package fails to build on hppa-linux with gcc-8. See:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=909396
The build fails when it tries to link a pie executable. It's main object
was compiled with -fPIE. Several archive libraries are linked against the
main object. These contain objects compiled with both the -fPIE and -fPIC
options. Only the -fPIC option is recorded for LTO.
In gcc-8, -fPIE + -fPIC are merged to nothing. So, the link fails when
non position-independent object is generated for an LTO object.
There is no warning about using -fPIE and -fPIC together. The documentation
implies these options are not compatible. In the systemd build, the addition
of these options is done by meson and it's not clear why both are added.
