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[Bug fortran/51779] gcc 4.6.2 build fails on Mac OS X Lion w/Xcode 4.2, with gfortran erorr
- From: "howarth at nitro dot med.uc.edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 09 Jan 2012 17:45:42 +0000
- Subject: [Bug fortran/51779] gcc 4.6.2 build fails on Mac OS X Lion w/Xcode 4.2, with gfortran erorr
- Auto-submitted: auto-generated
- References: <bug-51779-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51779
--- Comment #10 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-01-09 17:45:42 UTC ---
(In reply to comment #9)
> Thanks, Tobias. I did try out the gfortran 4.6.2 from here, and it does compile
> runnable code. Unfortunately, it still does not work with any version of gdb I
> have tried on Mac OS X. My end goal in building the whole of gcc 4.6.2 was to
> try building a Fortran code and debug it with the latest gdb version (7.3.1).
> No luck with this prebuilt gfortran binary either.
You will need to compile binaries with -Wl,-no_pie if you want to debug in
FSF gdb
under Lion (which defaults to -pie in the linker). Apple's gdb automatically
disables
aslr under Lion (which can be turned back on by setting the disable-aslr flag
to 0 within
Apple's gdb). This option doesn't exist in FSF gdb yet as far as I know.
ps There is some discussion of this at
http://reverse.put.as/2011/08/11/how-gdb-disables-aslr-in-mac-os-x-lion/.