On 3 December 2015 at 16:01, Martin Sebor wrote: > On 12/02/2015 06:48 PM, Peter Bergner wrote: >> >> On Wed, 2015-12-02 at 20:05 -0500, Ryan Burn wrote: >>> >>> Is there any way to easily build a stage1 gcc with macro support for >>> debugging? >>> >>> I tried setting CFLAGS, and CXXFLAGS to specify "-O0 -g3" via the >>> command line before running configure, but that only includes those >>> flags for some of the compilation steps. >>> >>> I was only successful after I manually edited the makefile to replace >>> "-g" with "-g3". >> >> >> Try CFLAGS_FOR_TARGET='-O0 -g3 -fno-inline' and CXXFLAGS_FOR_TARGET='-O0 >> -g3 -fno-inline' > > > I've been using STAGE1_CFLAGS as Andreas suggested. The tree > checks in GCC make heavy use of macros that GDB unfortunately > often has trouble with. See GDB bugs 19111, 1888, and 18881 > for some of the problems. To get around these, I end up using > info macro to print the macro definition and using whatever it > expands to instead. I wonder if someone has found a more > convenient workaround.
GDB's python printers might be useful here, but someone would have to do the work of re-defining the macros in python, and maybe keeping them up to date with changes to the macros.
