https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85669
--- Comment #11 from Douglas Mencken <dougmencken at gmail dot com> --- I’m bisecting yet CC="ccache /Developer/GCC/7.3p/PowerPC/32bit/bin/gcc" \ CXX="ccache /Developer/GCC/7.3p/PowerPC/32bit/bin/g++" \ ../gcc-build/configure \ --build=powerpc-unknown-darwin --host=powerpc-unknown-darwin --target=powerpc-unknown-darwin \ --prefix=/Developer/GCC/7_to_8_bisecting/PowerPC/32bit \ --enable-languages=c,c++,objc,obj-c++ \ --enable-shared --enable-static \ --enable-checking=release \ --enable-threads=posix --with-__thread --without-system-zlib \ --disable-nls --disable-werror make -j3 2>&1 | tee ../_7_to_8_bootstrap.log iain.patch is needed for 7.3 before r257501 patch https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=257501 that is git commit 566f381623050c5af7ba9d02d05a5b9b1c046158 you may get it from https://ftp.osuosl.org/pub/manulix/other/GCC/iain.patch $ git bisect start $ git bisect good gcc-7_3_0-release # "good" as in it reaches stage3, patched with iain.patch if it needs to $ git bisect bad gcc-8_1_0-release # otherwise it’s "bad" Bisecting: a merge base must be tested [7369309777f6d6e630fb7763bcd08a0317727e36] [ARM] Fix type for .init_array.* and .fini_array.* sections $ patch -p1 < ../patches/iain.patch $ ... configure and make ... $ cat stage_current stage3 $ git stash $ git bisect good # 7369309777f6d6e630fb7763bcd08a0317727e36 # r247015 Bisecting: 4002 revisions left to test after this (roughly 12 steps) [b50e3690fbcafedefdb888c2d66725b8f405706e] Add ChangeLog entries, missing from last commit $ patch -p1 < ../patches/iain.patch $ ... configure and make ... build/gencfn-macros: DEF_INTERNAL_INT_FN (PARITY) has no associated built-in functions make[3]: *** [s-case-cfn-macros] Error 1 $ cat stage_current stage2 $ git stash $ git bisect bad # b50e3690fbcafedefdb888c2d66725b8f405706e # r253946 Bisecting: 2001 revisions left to test after this (roughly 11 steps) [61cb18166c6a1507af78ce73a4e3c8a21b0cb8ab] * profile-count.h (profile_probability::from_reg_br_prob_note, profile_probability::to_reg_br_prob_note): New functions. $ patch -p1 < ../patches/iain.patch $ ... configure and make ... Undefined symbols: "make_pass_analyze_swaps(gcc::context*)", referenced from: gcc::pass_manager::pass_manager(gcc::context*) in libbackend.a(passes.o) gcc::pass_manager::pass_manager(gcc::context*) in libbackend.a(passes.o) "rs6000_output_load_multiple(rtx_def**)", referenced from: output_464(rtx_def**, rtx_insn*) in libbackend.a(insn-output.o) output_465(rtx_def**, rtx_insn*) in libbackend.a(insn-output.o) output_466(rtx_def**, rtx_insn*) in libbackend.a(insn-output.o) output_467(rtx_def**, rtx_insn*) in libbackend.a(insn-output.o) output_468(rtx_def**, rtx_insn*) in libbackend.a(insn-output.o) output_469(rtx_def**, rtx_insn*) in libbackend.a(insn-output.o) "expand_block_move(rtx_def**)", referenced from: gen_movmemsi(rtx_def*, rtx_def*, rtx_def*, rtx_def*) in libbackend.a(insn-emit.o) "expand_block_clear(rtx_def**)", referenced from: gen_setmemsi(rtx_def*, rtx_def*, rtx_def*, rtx_def*) in libbackend.a(insn-emit.o) ld: symbol(s) not found make[3]: *** [cc1plus] Error 1 $ cat stage_current stage1 $ git stash $ git bisect skip # 61cb18166c6a1507af78ce73a4e3c8a21b0cb8ab # r250239 Bisecting: 2001 revisions left to test after this (roughly 11 steps) [4f5b1ee8ccfd04b939e07bd99f4ca6f8d3f5aa83] PR go/80964 * configure.ac: Set NATIVE if host_alias = target_alias. * configure: Rebuild. $ patch -p1 < ../patches/iain.patch $ ... configure and make ... $ cat stage_current stage3 $ git stash $ git bisect good # 4f5b1ee8ccfd04b939e07bd99f4ca6f8d3f5aa83 # r249172 Bisecting: 1338 revisions left to test after this (roughly 10 steps) [a5079b7fe2c7b4c862704149db5fb0948a7d02f8] Adds the powerpc equivalent mm_malloc.h header which is needed by xmmintrin.h and cleans up some noisy warnings from the previous MMX commit. $ patch -p1 < ../patches/iain.patch $ ... configure and make ... $ cat stage_current stage3 $ git stash $ git bisect good # a5079b7fe2c7b4c862704149db5fb0948a7d02f8 # r251339 Bisecting: 668 revisions left to test after this (roughly 9 steps) [237c1ea8f68a7cc3100b63ee50da05c9e0b0ea6d] rs6000: Don't touch below the stack pointer (PR77687) $ patch -p1 < ../patches/iain.patch $ ... configure and make ... build/gencfn-macros: DEF_INTERNAL_INT_FN (FFS) has no associated built-in functions build/gencfn-macros: DEF_INTERNAL_INT_FN (PARITY) has no associated built-in functions make[3]: *** [s-case-cfn-macros] Error 1 $ cat stage_current stage2 $ git stash $ git bisect bad # 237c1ea8f68a7cc3100b63ee50da05c9e0b0ea6d # r253033 Bisecting: 334 revisions left to test after this (roughly 8 steps) [1f0c90bb95ae0d59c93a97dc12294425831c5080] 2017-09-07 Nicolas Roche <ro...@adacore.com> $ patch -p1 < ../patches/iain.patch $ ... configure and make ... build/gencfn-macros: DEF_INTERNAL_INT_FN (CTZ) has no associated built-in functions build/gencfn-macros: DEF_INTERNAL_INT_FN (FFS) has no associated built-in functions build/gencfn-macros: DEF_INTERNAL_INT_FN (PARITY) has no associated built-in functions make[3]: *** [s-case-cfn-macros] Error 1 $ cat stage_current stage2 $ git stash $ git bisect bad # 1f0c90bb95ae0d59c93a97dc12294425831c5080 # r251838 Bisecting: 166 revisions left to test after this (roughly 7 steps) [bc3e9c9df58c165b0157aabf69b222130c835a63] 2017-08-31 Richard Biener <rguent...@suse.de> $ patch -p1 < ../patches/iain.patch $ ... configure and make ... $ cat stage_current stage3 $ git stash $ git bisect good # bc3e9c9df58c165b0157aabf69b222130c835a63 # r251559 Bisecting: 83 revisions left to test after this (roughly 6 steps) [1694a564a16d2403ba1d80778eaacd49b1a62b2c] [gcc] $ patch -p1 < ../patches/iain.patch $ ... configure and make ... In short, briefly git bisect start git bisect good gcc-7_3_0-release # r257041 git bisect bad gcc-8_1_0-release # r259829 git bisect good 7369309777f6d6e630fb7763bcd08a0317727e36 # r247015 merge parent git bisect bad b50e3690fbcafedefdb888c2d66725b8f405706e # r253946 git bisect skip 61cb18166c6a1507af78ce73a4e3c8a21b0cb8ab # r250239 git bisect good 4f5b1ee8ccfd04b939e07bd99f4ca6f8d3f5aa83 # r249172 git bisect good a5079b7fe2c7b4c862704149db5fb0948a7d02f8 # r251339 git bisect bad 237c1ea8f68a7cc3100b63ee50da05c9e0b0ea6d # r253033 git bisect bad 1f0c90bb95ae0d59c93a97dc12294425831c5080 # r251838 git bisect good bc3e9c9df58c165b0157aabf69b222130c835a63 # r251559 git bisect ????? 1694a564a16d2403ba1d80778eaacd49b1a62b2c # r251723
