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/.
