On Thu, Nov 11, 2010 at 3:47 PM, Merrick, Thomas <thomas.merr...@tamucc.edu> wrote: > I would like to resurrect the PL/1 frontend which appears to have stopped > development about 3 years ago. I plan to start with the preprocessor, which > is a PL/1 subset interpreter. > > First of all, is this the correct list to ask questions about writing a > frontend? I plan on using GCC 4.5.1 and most of the example frontends seem > to be made for 4.4.3 or earlier and do not work against 4.5.1. Is there a > good example that works on 4.5.1? I just need the minimal subset right now > as the preprocessor does not output, except for debugging and the input > stream for the main PL/1 processor. > > When I wrote a minimal frontend program, I get the following during linking: > > /a0/staff/tmerrick/gcc-4.5.1/host-i686-pc-linux-gnu/prev-gcc/xgcc > -B/a0/staff/tmerrick/gcc-4.5.1/host-i686-pc-linux-gnu/prev-gcc/ > -B/usr/local/i686-pc-linux-gnu/bin/ -B/usr/local/i686-pc-linux-gnu/bin/ > -B/usr/local/i686-pc-linux-gnu/lib/ -isystem > /usr/local/i686-pc-linux-gnu/include -isystem > /usr/local/i686-pc-linux-gnu/sys-include -g -O2 -fomit-frame-pointer > -gtoggle -DIN_GCC -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 -DHAVE_CONFIG_H -o pl11 \ > pl1/pl11.o main.o libbackend.a ../libcpp/libcpp.a > ../libdecnumber/libdecnumber.a ../libcpp/libcpp.a ../libiberty/libiberty.a > ../libdecnumber/libdecnumber.a attribs.o > -L/a0/staff/tmerrick/gcc-4.5.1/host-i686-pc-linux-gnu/gmp/.libs > -L/a0/staff/tmerrick/gcc-4.5.1/host-i686-pc-linux-gnu/mpfr/.libs > -L/a0/staff/tmerrick/gcc-4.5.1/host-i686-pc-linux-gnu/mpc/src/.libs -lmpc > -lmpfr -lgmp -rdynamic -ldl -L../zlib -lz -lelf > libbackend.a(coverage.o):(.rodata+0x20): undefined reference to > `gt_ggc_mx_lang_tree_node' > libbackend.a(coverage.o):(.rodata+0x24): undefined reference to > `gt_pch_nx_lang_tree_node' > libbackend.a(dbxout.o):(.rodata+0x180): undefined reference to > `gt_ggc_mx_lang_tree_node' > libbackend.a(dbxout.o):(.rodata+0x184): undefined reference to > `gt_pch_nx_lang_tree_node' > > With the last 4 lines repeated about 100 times for various parts of the > backend. I am not sure if this is for debugging or inline code, but there is > obviously something that I am missing. Any ideas?
You need to define a lang_tree_node type, even if its empty. See the lto frontend example. > > Tom Merrick > IT Manager > College of Science & Technology > Texas A&M University > CI 352 > 6300 Ocean Drive > Corpus Christi, TX 78412-5806 > Phone: 361-825-2435 > Fax: 361-825-5789 > >
