https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66587
Bug ID: 66587
Summary: -no_compact_unwind is dropped for
-nodefaultlibs/-nostdlib
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: ossman at cendio dot se
Target Milestone: ---
As the summary states, you will get bitten by bug 41260 if you happen to
specify -nodefaultlibs or -nostdlib as -no_compact_unwind is pulled in via
%(link_gcc_c_sequence), which in turn is conditional on those first to flags.
The comment in the code states that -no_compact_unwind is needed because of
problems with libSystem. In that case it would make sense to tie it to where
libSystem gets pulled in. However, reading bug 41260 and related links, I
interpret things as being a problem in Apple's ld. Hence the flag should always
be used as that linker is always assumed.
I'm not sure what the best approach is to do that. I'm planning on trying to
move it from LINK_GCC_C_SEQUENCE_SPEC to LINK_SPEC.
(The same thing might affect the "-no_pie" magic, but I haven't found the
justification for that code)
