Richard, Doesn't REGISTER_TARGET_PRAGMAS need to call c_register_pragma, etc, if we want to specify target-specific pragma? It becomes part of libbackend.a, which is linked to lto1. One solution I see is to put them into a separate file so the linker won't produce undefined references when they are not actually used by lto1.
Thanks, Bingfeng > -----Original Message----- > From: Richard Guenther [mailto:richard.guent...@gmail.com] > Sent: 12 October 2009 15:34 > To: Bingfeng Mei > Cc: gcc@gcc.gnu.org > Subject: Re: Issues of the latest trunk with LTO merges > > On Mon, Oct 12, 2009 at 4:31 PM, Bingfeng Mei > <b...@broadcom.com> wrote: > > Hello, > > I ran into an issue with the LTO merges when updating to > current trunk. > > The problem is that my target calls a few functions/uses > some data structures > > in the gcc directory: c_language, paragma_lex, > c_register_pragma, etc. > > > > gcc -m32 -g -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall > -Wwrite-strings -Wcast-qual -Wstrict-prototypes > -Wmissing-prototypes -Wmissing-format-attribute -pedantic > -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings > -Wold-style-definition -Wc++-compat -fno-common > -DHAVE_CONFIG_H -o lto1 \ > > lto/lto-lang.o lto/lto.o lto/lto-elf.o > attribs.o main.o tree-browser.o libbackend.a > ../libcpp/libcpp.a ../libdecnumber/libdecnumber.a > -L/projects/firepath/tools/work/bmei/packages/gmp/4.3.0/lib > -L/projects/firepath/tools/work/bmei/packages/mpfr/2.4.1/lib > -lmpfr -lgmp -rdynamic -ldl -L../zlib -lz > -L/projects/firepath/tools/work/bmei/packages/libelf/lib > -lelf ../libcpp/libcpp.a ../libiberty/libiberty.a > ../libdecnumber/libdecnumber.a -lelf > > > > When compiling for lto1 in above step, I have many linking > errors consequently. > > I tried to add some extra object files like c-common.o, > c-pragma.o, etc into > > lto/Make-lang.in. More linking errors are produced. One > problem is that lto > > code redefines some data exist in the main code: > flag_no_builtin, flag_isoc99 > > lang_hooks, etc, which prevent it from linking with object > files in main directory. > > > > What is the clean solution for this? Thanks in advance. > > You should not use C frontend specific stuff when not building > the C frontend. > > Richard. > > > Cheers, > > Bingfeng Mei > > > > > > > >
