http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55209
Bug #: 55209
Summary: gdb reports 'No symbol "<x>" in current context.' at
-O0 -g
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: h...@gcc.gnu.org
Target: x86_64-linux
At revision r192677, I have problems debugging cse1, as a local variable is
gone at -O0 -g3.
To repeat, just bootstrap, then "rm cse.o" and "make cc1 CXXFLAGS=-g3". Enter
gdb-7.5 for cc1 with a suitable command-line (for example "-fpreprocessed
pr55030-chk.i -quiet -dumpbase pr55030-chk.c -m32 -mtune=generic -march=x86-64
-auxbase pr55030-chk -Os -w -version -fno-diagnostics-show-caret
-fno-tree-loop-distribute-patterns -o pr55030-chk.s" with the attached
pr55030-chk.i, but this is not important)
Set a breakpoint on line 5084 (at r192677 it says "if (MEM_P (trial) && MEM_P
(SET_DEST (sets[i].rtl)))"). When the breakpoint hits, do "p trial". gdb will
respond with 'No symbol "trial" in current context.'
PS. you might want to build gdb-7.5 with "--without-auto-load-safe-path" or add
"add-auto-load-safe-path /home" to your ~/.gdbinit, assuming your gcc-trees are
under your user home directory.
