As of 20080903, mainline doesn't bootstrap on alpha-dec-osf5.1b: in stage2, compiling build/gengtype-lex.o results in an ICE:
/vol/gccsrc/obj/gcc-4.4.0-20080903/5.1b-gcc/./prev-gcc/xgcc -B/vol/gccsrc/obj/gcc-4.4.0-20080903/5.1b-gcc/./prev-gcc/ -B/vol/gcc/alpha-dec-osf5.1b/bin/ -c -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual -Wold-style-definition -Wc++-compat -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common -Wno-error -DHAVE_CONFIG_H -DGENERATOR_FILE -I. -Ibuild -I/vol/gcc/src/gcc-dist/gcc -I/vol/gcc/src/gcc-dist/gcc/build -I/vol/gcc/src/gcc-dist/gcc/../include -I/vol/gcc/src/gcc-dist/gcc/../libcpp/include -I/vol/gcc/include -I/vol/gcc/include -I/vol/gcc/src/gcc-dist/gcc/../libdecnumber -I/vol/gcc/src/gcc-dist/gcc/../libdecnumber/dpd -I../libdecnumber -o build/gengtype-lex.o gengtype-lex.c gengtype-lex.c: In function 'yy_get_next_buffer': gengtype-lex.c:1653: warning: old-style function definition gengtype-lex.c: In function 'yy_get_previous_state': gengtype-lex.c:1785: warning: old-style function definition gengtype-lex.c: In function 'input': gengtype-lex.c:1898: warning: old-style function definition /vol/gcc/src/gcc-dist/gcc/gengtype-lex.l: At top level: gengtype-lex.c:1898: warning: 'input' defined but not used gengtype-lex.c: In function 'yylex': gengtype-lex.c:1641: internal compiler error: in ira_flattening, at ira-build.c:2146 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. make[3]: *** [build/gengtype-lex.o] Error 1 This might be identical to PR rtl-optimization/37333. I'm currently running a mainline bootstrap as of 20080908 to check. -- Summary: [4.4 regression] IRA merge breaks Tru64 UNIX bootstrap Product: gcc Version: 4.4.0 Status: UNCONFIRMED Severity: major Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ro at gcc dot gnu dot org GCC build triplet: alpha-dec-osf5.1b GCC host triplet: alpha-dec-osf5.1b GCC target triplet: alpha-dec-osf5.1b http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37426
