This is my first post to this listing and first time I am trying to build GCC. I have a legacy application that is using 4.2.4 and running on an old build server. I need to migrate this to a new build server and want to start using a modern age version of GCC (4.8.2). I can successfully build the app with 4.8.2 but many unit tests are failing for strange reasons and is actually revealing possible bugs that have gone undetected but now are appearing when built with a new version of GCC. To help with understanding what changes between the two builds, I want to be able to build with both 4.2.4 on 4.8.2 on the new build server and be able to use my debugger to analyze the test runs and solve the problems. So, that's the answer to the "why would you want to use 4.2.4" question. I followed the good build instructions on the GNU web site and I believe my build server is setup up properly to do a build of GCC. It is clean install of Fedora 20. The build gets well along and then I get error below. Below is the configure output and a snippet of the end of the console output where the build fails. Any tips you might give are greatly appreciated. Thanks, Mark [root@localhost 424obj]# ../gcc-4.2.4/configure --prefix=/usr/local/tools/gcc/4.2.4 creating cache ./config.cache checking host system type... x86_64-unknown-linux-gnu checking target system type... x86_64-unknown-linux-gnu checking build system type... x86_64-unknown-linux-gnu checking for a BSD compatible install... /usr/bin/install -c checking whether ln works... yes checking whether ln -s works... yes checking for gcc... gcc checking whether the C compiler (gcc ) works... yes checking whether the C compiler (gcc ) is a cross-compiler... no checking whether we are using GNU C... yes checking whether gcc accepts -g... yes checking for gnatbind... gnatbind checking whether compiler driver understands Ada... yes checking how to compare bootstrapped objects... cmp --ignore-initial=16 $$f1 $$f2 checking for correct version of gmp.h... yes checking for correct version of mpfr.h... yes checking for any version of mpfr.h... yes The following languages will be built: c,c++,fortran,java,objc *** This configuration is not supported in the following subdirectories: target-libada gnattools (Any other directories should still work fine.) checking for bison... no checking for byacc... no checking for yacc... no checking for bison... no checking for gm4... no checking for gnum4... no checking for m4... no checking for flex... no checking for lex... no checking for flex... no checking for makeinfo... no checking for expect... no checking for runtest... no checking for x86_64-unknown-linux-gnu-ar... no checking for ar... ar checking for x86_64-unknown-linux-gnu-as... no checking for as... as checking for x86_64-unknown-linux-gnu-dlltool... no checking for dlltool... no checking for x86_64-unknown-linux-gnu-ld... no checking for ld... ld checking for x86_64-unknown-linux-gnu-lipo... no checking for lipo... no checking for x86_64-unknown-linux-gnu-nm... no checking for nm... nm checking for x86_64-unknown-linux-gnu-ranlib... no checking for ranlib... ranlib checking for x86_64-unknown-linux-gnu-strip... no checking for strip... strip checking for x86_64-unknown-linux-gnu-windres... no checking for windres... no checking for x86_64-unknown-linux-gnu-objcopy... no checking for objcopy... objcopy checking for x86_64-unknown-linux-gnu-objdump... no checking for objdump... objdump checking for x86_64-unknown-linux-gnu-cc... no checking for cc... cc checking for x86_64-unknown-linux-gnu-c++... no checking for c++... c++ checking for x86_64-unknown-linux-gnu-gcc... no checking for gcc... gcc checking for x86_64-unknown-linux-gnu-gcj... no checking for gcj... no checking for x86_64-unknown-linux-gnu-gfortran... no checking for gfortran... no checking for ar... no checking for x86_64-unknown-linux-gnu-ar... no checking for ar... ar checking for as... no checking for x86_64-unknown-linux-gnu-as... no checking for as... as checking for dlltool... no checking for x86_64-unknown-linux-gnu-dlltool... no checking for dlltool... no checking for ld... no checking for x86_64-unknown-linux-gnu-ld... no checking for ld... ld checking for lipo... no checking for x86_64-unknown-linux-gnu-lipo... no checking for lipo... no checking for nm... no checking for x86_64-unknown-linux-gnu-nm... no checking for nm... nm checking for objdump... no checking for x86_64-unknown-linux-gnu-objdump... no checking for objdump... objdump checking for ranlib... no checking for x86_64-unknown-linux-gnu-ranlib... no checking for ranlib... ranlib checking for strip... no checking for x86_64-unknown-linux-gnu-strip... no checking for strip... strip checking for windres... no checking for x86_64-unknown-linux-gnu-windres... no checking for windres... no checking where to find the target ar... host tool checking where to find the target as... host tool checking where to find the target cc... just compiled checking where to find the target c++... just compiled checking where to find the target c++ for libstdc++... just compiled checking where to find the target dlltool... host tool checking where to find the target gcc... just compiled checking where to find the target gcj... just compiled checking where to find the target gfortran... just compiled checking where to find the target ld... host tool checking where to find the target lipo... host tool checking where to find the target nm... host tool checking where to find the target objdump... host tool checking where to find the target ranlib... host tool checking where to find the target strip... host tool checking where to find the target windres... host tool checking whether to enable maintainer-specific portions of Makefiles... no checking whether -fkeep-inline-functions is supported... yes updating cache ./config.cache creating ./config.status creating Makefile /root/Downloads/424obj/./gcc/xgcc -B/root/Downloads/424obj/./gcc/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/bin/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/include -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/sys-include -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../../gcc-4.2.4/gcc -I../../gcc-4.2.4/gcc/. -I../../gcc-4.2.4/gcc/../include -I../../gcc-4.2.4/gcc/../libcpp/include -I../../gcc-4.2.4/gcc/../libdecnumber -I../libdecnumber -m32 -DL_gcov_execve -c ../../gcc-4.2.4/gcc/libgcov.c -o libgcc/32/_gcov_execve.o /root/Downloads/424obj/./gcc/xgcc -B/root/Downloads/424obj/./gcc/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/bin/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/include -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/sys-include -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../../gcc-4.2.4/gcc -I../../gcc-4.2.4/gcc/. -I../../gcc-4.2.4/gcc/../include -I../../gcc-4.2.4/gcc/../libcpp/include -I../../gcc-4.2.4/gcc/../libdecnumber -I../libdecnumber -m32 -DL_gcov_interval_profiler -c ../../gcc-4.2.4/gcc/libgcov.c -o libgcc/32/_gcov_interval_profiler.o /root/Downloads/424obj/./gcc/xgcc -B/root/Downloads/424obj/./gcc/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/bin/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/include -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/sys-include -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../../gcc-4.2.4/gcc -I../../gcc-4.2.4/gcc/. -I../../gcc-4.2.4/gcc/../include -I../../gcc-4.2.4/gcc/../libcpp/include -I../../gcc-4.2.4/gcc/../libdecnumber -I../libdecnumber -m32 -DL_gcov_pow2_profiler -c ../../gcc-4.2.4/gcc/libgcov.c -o libgcc/32/_gcov_pow2_profiler.o /root/Downloads/424obj/./gcc/xgcc -B/root/Downloads/424obj/./gcc/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/bin/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/include -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/sys-include -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../../gcc-4.2.4/gcc -I../../gcc-4.2.4/gcc/. -I../../gcc-4.2.4/gcc/../include -I../../gcc-4.2.4/gcc/../libcpp/include -I../../gcc-4.2.4/gcc/../libdecnumber -I../libdecnumber -m32 -DL_gcov_one_value_profiler -c ../../gcc-4.2.4/gcc/libgcov.c -o libgcc/32/_gcov_one_value_profiler.o /root/Downloads/424obj/./gcc/xgcc -B/root/Downloads/424obj/./gcc/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/bin/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/include -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/sys-include -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../../gcc-4.2.4/gcc -I../../gcc-4.2.4/gcc/. -I../../gcc-4.2.4/gcc/../include -I../../gcc-4.2.4/gcc/../libcpp/include -I../../gcc-4.2.4/gcc/../libdecnumber -I../libdecnumber -m32 -fexceptions -fvisibility=hidden -DHIDE_EXPORTS -c ../../gcc-4.2.4/gcc/unwind-dw2.c -o libgcc/32/unwind-dw2.o /root/Downloads/424obj/./gcc/xgcc -B/root/Downloads/424obj/./gcc/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/bin/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/include -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/sys-include -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../../gcc-4.2.4/gcc -I../../gcc-4.2.4/gcc/. -I../../gcc-4.2.4/gcc/../include -I../../gcc-4.2.4/gcc/../libcpp/include -I../../gcc-4.2.4/gcc/../libdecnumber -I../libdecnumber -m32 -fexceptions -fvisibility=hidden -DHIDE_EXPORTS -c ../../gcc-4.2.4/gcc/unwind-dw2-fde-glibc.c -o libgcc/32/unwind-dw2-fde-glibc.o /root/Downloads/424obj/./gcc/xgcc -B/root/Downloads/424obj/./gcc/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/bin/ -B/usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/include -isystem /usr/local/tools/gcc/4.2.4/x86_64-unknown-linux-gnu/sys-include -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../../gcc-4.2.4/gcc -I../../gcc-4.2.4/gcc/. -I../../gcc-4.2.4/gcc/../include -I../../gcc-4.2.4/gcc/../libcpp/include -I../../gcc-4.2.4/gcc/../libdecnumber -I../libdecnumber -m32 -fexceptions -fvisibility=hidden -DHIDE_EXPORTS -c ../../gcc-4.2.4/gcc/unwind-sjlj.c -o libgcc/32/unwind-sjlj.o In file included from ../../gcc-4.2.4/gcc/unwind-dw2.c:338: ../../gcc-4.2.4/gcc/config/i386/linux-unwind.h: In function 'x86_fallback_frame_state': ../../gcc-4.2.4/gcc/config/i386/linux-unwind.h:142: error: field 'info' has incomplete type make[4]: *** [libgcc/32/unwind-dw2.o] Error 1 make[4]: *** Waiting for unfinished jobs.... make[4]: Leaving directory `/root/Downloads/424obj/gcc' make[3]: *** [stmp-multilib] Error 2 make[3]: Leaving directory `/root/Downloads/424obj/gcc' make[2]: *** [all-stage1-gcc] Error 2 make[2]: Leaving directory `/root/Downloads/424obj' make[1]: *** [stage1-bubble] Error 2 make[1]: Leaving directory `/root/Downloads/424obj' make: *** [all] Error 2
