http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56307
--- Comment #15 from John David Anglin <danglin at gcc dot gnu.org> 2013-03-14 23:46:18 UTC --- Adding -fvar-tracking -fvar-tracking-assignments results in the following warning on hppa2.0w-hp-hpux11.11: spawn /test/gnu/gcc/objdir/gcc/xgcc -B/test/gnu/gcc/objdir/gcc/ /test/gnu/gcc/gc c/gcc/testsuite/gcc.dg/tree-ssa/pr55579.c -fno-diagnostics-show-caret -O2 -g -fdump-tree-esra -fvar-tracking -fvar-tracking-assignments -S -o pr55579.s /test/gnu/gcc/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr55579.c:1:0: warning: variable tracking requested, but not supported by this debug format [enabled by default]