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make bootstrap4-lean failed with 4.4.0 and 4.4.1 with crtfastmath.o comparison. The last gcc version I can make bootstrap4-lean was 4.3.3 (and before that, 4.3.1) which was what I tried building 4.4.x with. Strangely "make" (which I understand do a 3 stage boostrap) doesn't have this problem, but fails further down with path length problems ( http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38251#c8 ). objdump -Dxzs ./prev-gcc/crtfastmath.o > prev-gcc-crtfastmath-dump objdump -Dxzs ./gcc/crtfastmath.o > gcc-crtfastmath-dump objdump -Dxzs /usr/local/lib/gcc/alphaev68-dec-osf5.1a/4.3.3/crtfastmath.o \ > gcc-4.3.3-crtfastmath-dump ------------- # diff prev-gcc-crtfastmath-dump gcc-crtfastmath-dump 2,3c2,3 < ./prev-gcc/crtfastmath.o: file format ecoff-littlealpha < ./prev-gcc/crtfastmath.o --- > ./gcc/crtfastmath.o: file format ecoff-littlealpha > ./gcc/crtfastmath.o 73c73 < 0030 31000000 02000204 00000000 00000000 1............... --- > 0030 01000000 02000204 00000000 00000000 ................ 103c103 < 30: 31 00 00 00 call_pal 0x31 --- > 30: 01 00 00 00 call_pal 0x1 -------------------- I also 'diff gcc-crtfastmath-dump gcc-4.3.3-crtfastmath-dump' - while I don't understand alpha assembler at all, the diff against with gcc 4.3.3 is mostly versioning, and gcc 4.3.3. also have call_pal 0x31. So it appears that bootstrap4-lean miscompile at the last stage? (i.e. prev-gcc/crtfastmath.o was correct, gcc/crtfastmath.o was wrong). Anybody can suggest how to take this forward? I am currently on 4.3.3, but am keen to heep the alpha port of gcc alive for as long as is feasible...
There is no indication in this bug report of whether the issue also appears for 4.5. If it does, please update the regression marker to "4.4/4.5 Regression".
(In reply to comment #1) > There is no indication in this bug report of whether the issue also > appears for 4.5. If it does, please update the regression marker to > "4.4/4.5 Regression". I downloaded and tried the gcc-4.5-20090723 snapshot tar ball with make bootstrap-lean - it finished the building and comparison of the C compiler but failed later in libstdc++-v3 . I hope this get fixed by 4.4.2 if there is one. Meanwhile I'll check and possibly file the libstdc++-v3 issue.
FYI, the libstdc++v3 issue with gcc 4.5 is filed as bug 40912 . So gcc 4.4/4.5 support are both a bit broken, just differently.
situation gone worse: make[3]: Leaving directory `/home/htl10/tmp-build/ob-dir' Comparing stages 2 and 3 warning: gcc/cc1-checksum.o differs warning: gcc/cc1plus-checksum.o differs warning: gcc/cc1obj-checksum.o differs Bootstrap comparison failure! gcc/java/win32-host.o differs gcc/build/min-insn-modes.o differs gcc/dummy-checksum.o differs gcc/insn-peep.o differs gcc/graphite-blocking.o differs gcc/graphite-clast-to-gimple.o differs gcc/graphite-dependences.o differs gcc/graphite-interchange.o differs gcc/graphite-poly.o differs gcc/graphite-ppl.o differs gcc/graphite-scop-detection.o differs gcc/graphite-sese-to-poly.o differs gcc/loop-doloop.o differs gcc/version.o differs gcc/vmsdbgout.o differs gcc/xcoffout.o differs gcc/host-default.o differs gcc/gcc-options.o differs gcc/collect2-aix.o differs intl/osdep.o differs libiberty/safe-ctype.o differs make[2]: *** [compare] Error 1 make[2]: Leaving directory `/home/htl10/tmp-build/ob-dir' make[1]: *** [stage3-bubble] Error 2 make[1]: Leaving directory `/home/htl10/tmp-build/ob-dir' make: *** [bootstrap4-lean] Error 2 bash-2.05a#
latest run was with svn-r152154 . also filed new bug 41465 , I just noticed I wrote 'bootstrap-lean' in comment 2 instead of 'bootstrap4-lean' - it is probably not important in light of the new bug and more extensive failures.
4.3.5 also bootstrap4-lean alright (hit bug 40947 later with libjava).
4.4.4 (built with 4.3.3) fails at stage 3 and 4 comparison. Comparing stages 3 and 4 Bootstrap comparison failure! ./crtfastmath.o differs make[2]: *** [compare3] Error 1 objdump -Dxzs stage3-gcc/crtfastmath.o > stage3-dump objdump -Dxzs stage4-gcc/crtfastmath.o > stage4-dump # diff -u stage3-dump stage4-dump --- stage3-dump 2010-07-14 15:30:13.000000000 +0100 +++ stage4-dump 2010-07-14 15:30:27.000000000 +0100 @@ -1,6 +1,6 @@ -stage3-gcc/crtfastmath.o: file format ecoff-littlealpha -stage3-gcc/crtfastmath.o +stage4-gcc/crtfastmath.o: file format ecoff-littlealpha +stage4-gcc/crtfastmath.o architecture: alpha, flags 0x00000035: HAS_RELOC, HAS_LINENO, HAS_SYMS, HAS_LOCALS start address 0x00000000 @@ -70,7 +70,7 @@ 0010 00301f22 10807da7 00405b6b 0100ba27 .0."..}..@[k...' 0020 2480bd23 00005ea7 1000de23 0180fa6b $..#..^....#...k Contents of section .xdata: - 0030 31000000 02000204 00000000 00000000 1............... + 0030 01000000 02000204 00000000 00000000 ................ Contents of section .pdata: 0040 00000000 ecffffff ........ Contents of section .lita: @@ -100,7 +100,7 @@ Disassembly of section .xdata: 00000030 <.xdata>: - 30: 31 00 00 00 call_pal 0x31 + 30: 01 00 00 00 call_pal 0x1 34: 02 00 02 04 .long 0x4020002 38: 00 00 00 00 halt 3c: 00 00 00 00 halt
Just try with 4.4.5, still fails at the same place: make[2]: Entering directory `/home/htl10/tmp-build/gcc-445-obj' make[3]: Entering directory `/home/htl10/tmp-build/gcc-445-obj' rm -f stage_current make[3]: Leaving directory `/home/htl10/tmp-build/gcc-445-obj' Comparing stages 3 and 4 Bootstrap comparison failure! ./crtfastmath.o differs make[2]: *** [compare3] Error 1 make[2]: Leaving directory `/home/htl10/tmp-build/gcc-445-obj' make[1]: *** [stage4-bubble] Error 2 make[1]: Leaving directory `/home/htl10/tmp-build/gcc-445-obj' make: *** [bootstrap4-lean] Error 2 bash-2.05a# bash-2.05a# objdump -Dxzs stage3-gcc/crtfastmath.o > stage3-dump bash-2.05a# objdump -Dxzs stage4-gcc/crtfastmath.o > stage4-dump bash-2.05a# diff -u stage3-dump stage4-dump --- stage3-dump 2010-12-15 05:03:03.000000000 +0000 +++ stage4-dump 2010-12-15 05:03:18.000000000 +0000 @@ -1,6 +1,6 @@ -stage3-gcc/crtfastmath.o: file format ecoff-littlealpha -stage3-gcc/crtfastmath.o +stage4-gcc/crtfastmath.o: file format ecoff-littlealpha +stage4-gcc/crtfastmath.o architecture: alpha, flags 0x00000035: HAS_RELOC, HAS_LINENO, HAS_SYMS, HAS_LOCALS start address 0x00000000 @@ -70,7 +70,7 @@ 0010 00301f22 10807da7 00405b6b 0100ba27 .0."..}..@[k...' 0020 2480bd23 00005ea7 1000de23 0180fa6b $..#..^....#...k Contents of section .xdata: - 0030 31000000 02000204 00000000 00000000 1............... + 0030 01000000 02000204 00000000 00000000 ................ Contents of section .pdata: 0040 00000000 ecffffff ........ Contents of section .lita: @@ -100,7 +100,7 @@ Disassembly of section .xdata: 00000030 <.xdata>: - 30: 31 00 00 00 call_pal 0x31 + 30: 01 00 00 00 call_pal 0x1 34: 02 00 02 04 .long 0x4020002 38: 00 00 00 00 halt 3c: 00 00 00 00 halt bash-2.05a#
4.4.6 failed at same place. make[2]: Entering directory `/home/htl10/tmp-build/gcc-446-obj-2' make[3]: Entering directory `/home/htl10/tmp-build/gcc-446-obj-2' rm -f stage_current make[3]: Leaving directory `/home/htl10/tmp-build/gcc-446-obj-2' Comparing stages 3 and 4 Bootstrap comparison failure! ./crtfastmath.o differs make[2]: *** [compare3] Error 1 make[2]: Leaving directory `/home/htl10/tmp-build/gcc-446-obj-2' make[1]: *** [stage4-bubble] Error 2 make[1]: Leaving directory `/home/htl10/tmp-build/gcc-446-obj-2' make: *** [bootstrap4-lean] Error 2 bash-2.05a# objdump -Dxzs stage3-gcc/crtfastmath.o > stage3-dump bash-2.05a# objdump -Dxzs stage4-gcc/crtfastmath.o > stage4-dump bash-2.05a# diff -u stage3-dump stage4-dump --- stage3-dump 2011-05-01 23:14:28.000000000 +0100 +++ stage4-dump 2011-05-01 23:14:41.000000000 +0100 @@ -1,6 +1,6 @@ -stage3-gcc/crtfastmath.o: file format ecoff-littlealpha -stage3-gcc/crtfastmath.o +stage4-gcc/crtfastmath.o: file format ecoff-littlealpha +stage4-gcc/crtfastmath.o architecture: alpha, flags 0x00000035: HAS_RELOC, HAS_LINENO, HAS_SYMS, HAS_LOCALS start address 0x00000000 @@ -70,7 +70,7 @@ 0010 00301f22 10807da7 00405b6b 0100ba27 .0."..}..@[k...' 0020 2480bd23 00005ea7 1000de23 0180fa6b $..#..^....#...k Contents of section .xdata: - 0030 31000000 02000204 00000000 00000000 1............... + 0030 01000000 02000204 00000000 00000000 ................ Contents of section .pdata: 0040 00000000 ecffffff ........ Contents of section .lita: @@ -100,7 +100,7 @@ Disassembly of section .xdata: 00000030 <.xdata>: - 30: 31 00 00 00 call_pal 0x31 + 30: 01 00 00 00 call_pal 0x1 34: 02 00 02 04 .long 0x4020002 38: 00 00 00 00 halt 3c: 00 00 00 00 halt bash-2.05a#
Could this be some kind of text<->num conversion bug? I can't help but thinking 0x31 is '1' in ascii character, which is 0x01 in value.
Tried 4.6.1: CONFIG_SHELL=/usr/local/bin/bash /home/htl10/tmp-build/gcc-4.6.1/configure && CONFIG_SHELL=/usr/local/bin/bash /usr/local/bin/make bootstrap4-lean and it worked.
4.6.1 worked. 4.5.x fails earlier with Bug 44959 .
re-testing due to doubts about http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44959#c30 - caveat STAGE2_CFLAGS, bootstrap4-lean goes beyond crtfastmath.o comparision for 4.7.1 , fails for 4.4.7, okay for 4.3.3 (fails later for libjava bug 40947) and okay for 4.6.1.
4.3.6 also okay.