------- Comment #1 from pinskia at gmail dot com 2009-11-16 14:31 ------- Subject: Re: New: DWARF .debug_macinfo contains unused macros
Sent from my iPhone On Nov 16, 2009, at 6:12 AM, "jan dot kratochvil at redhat dot com" <gcc-bugzi...@gcc.gnu.org > wrote: > -g3 currently produces huge objects as it contains many unused macros. > -g2 produces no macros debug info so GDB cannot provide its expansion. > That is by design and the reason why -g is -g2 by default .... > There is no way to store just the used macros. > > (debuginfo compression driven by Roland McGrath may eliminate them but > still...) > > While even a macro never used by a program can be helpful in most > cases IMO it > is enough to provide the macro definitions touched by the code being > debugged. > > -feliminate-unused-debug-symbols -feliminate-unused-debug-types have > no effect. > > --- > --- > --- > ---------------------------------------------------------------------- > #define NOT used > #define USED(x) x > int main (void) { return USED (0); } > --- > --- > --- > ---------------------------------------------------------------------- > > Getting: > gcc -g3 -o unusedmacro unusedmacro.c -Wall; readelf -wm unusedmacro > DW_MACINFO_define - lineno : 1 macro : NOT used > DW_MACINFO_define - lineno : 2 macro : USED(x) x > > or: > gcc -g2 -o unusedmacro unusedmacro.c -Wall; readelf -wm unusedmacro > <nothing printed> > > Expected output: > gcc -g3 -o unusedmacro unusedmacro.c -Wall; readelf -wm unusedmacro > DW_MACINFO_define - lineno : 2 macro : USED(x) x > > > -- > Summary: DWARF .debug_macinfo contains unused macros > Product: gcc > Version: 4.5.0 > Status: UNCONFIRMED > Severity: minor > Priority: P3 > Component: debug > AssignedTo: unassigned at gcc dot gnu dot org > ReportedBy: jan dot kratochvil at redhat dot com > GCC target triplet: x86_64-unknown-linux-gnu > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42065 > -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42065