https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64481
Bug ID: 64481
Summary: [5 Regression] r219076 breaks bootstrap
(x86_64-unknown-linux-gnu)
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: blocker
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: david.abdurachmanov at gmail dot com
While doing testing, I found that I couldn't bootstrap GCC anymore during
holidays.
Using git bisect, I found first breaking commit:
d326c10c2de4a884476d099dbeca4794e145d8c1 / r219076.
Last good commit: 09196675b74bd04b562fe3b264a9648eb0568a59 / r219075
Last tested bad: 27f6a8a0012f8df67c88b9d28ab47c3492319a07 / r219158
Tested on Fedora 21 OpenStack image (clean setup). Commands executed on a new
virtual machine:
yum makecache
yum update
yum -y groupinstall "Development Tools"
yum -y groupinstall "C Development Tools and Libraries"
yum -y install zlib-devel
mkdir -p /build
cd /build/
git clone git://gcc.gnu.org/git/gcc.git
git checkout d326c10c2de4a884476d099dbeca4794e145d8c1
./contrib/download_prerequisites
mkdir obj
cd obj
../configure --prefix=/tmp/gccbuild --enable-bootstrap --disable-checking
--enable-languages=c,c++ --disable-multilib --with-system-zlib --enable-shared
--disable-nls
make -j4 bootstrap
[snip]
make[2]: Entering directory '/build/gcc/obj'
make[3]: Entering directory '/build/gcc/obj'
rm -f stage_current
make[3]: Leaving directory '/build/gcc/obj'
Comparing stages 2 and 3
warning: gcc/cc1-checksum.o differs
warning: gcc/cc1plus-checksum.o differs
Bootstrap comparison failure!
gcc/valtrack.o differs
gcc/rtlanal.o differs
gcc/tree-ssa-ccp.o differs
gcc/tree-nested.o differs
gcc/tree-vect-stmts.o differs
gcc/tree-ssa-loop-ivopts.o differs
gcc/tree-sra.o differs
gcc/dwarf2out.o differs
gcc/lto/lto.o differs
gcc/c/c-typeck.o differs
gcc/c/c-array-notation.o differs
gcc/c/c-decl.o differs
gcc/c/c-parser.o differs
gcc/tree-ssa-uninit.o differs
gcc/i386.o differs
gcc/tree-ssa.o differs
gcc/expr.o differs
gcc/except.o differs
gcc/tree-ssa-reassoc.o differs
gcc/rtl-error.o differs
gcc/tree-ssa-tail-merge.o differs
gcc/omp-low.o differs
gcc/ipa-icf.o differs
gcc/dominance.o differs
gcc/toplev.o differs
gcc/tree-ssa-structalias.o differs
gcc/ipa-pure-const.o differs
gcc/ipa-profile.o differs
gcc/coverage.o differs
gcc/ifcvt.o differs
gcc/tree-ssa-threadedge.o differs
gcc/tree-inline.o differs
gcc/trans-mem.o differs
gcc/lto-streamer-out.o differs
gcc/loop-iv.o differs
gcc/ipa-polymorphic-call.o differs
gcc/ipa-reference.o differs
gcc/tree-ssa-math-opts.o differs
gcc/graphite-sese-to-poly.o differs
gcc/cgraph.o differs
gcc/sese.o differs
gcc/ipa-split.o differs
gcc/tree-ssa-sccvn.o differs
gcc/tree-into-ssa.o differs
gcc/alias.o differs
gcc/attribs.o differs
gcc/c-family/c-pretty-print.o differs
gcc/c-family/array-notation-common.o differs
gcc/c-family/c-common.o differs
gcc/ipa-inline-analysis.o differs
gcc/vtable-verify.o differs
gcc/ipa-chkp.o differs
gcc/cfgrtl.o differs
gcc/ipa-inline-transform.o differs
gcc/tree-ssa-loop-im.o differs
gcc/dwarf2cfi.o differs
gcc/tree-ssa-dom.o differs
gcc/tree-eh.o differs
gcc/gcov.o differs
gcc/loop-invariant.o differs
gcc/tree-vrp.o differs
gcc/opts.o differs
gcc/combine-stack-adj.o differs
gcc/gimplify.o differs
gcc/varasm.o differs
gcc/tree-ssa-pre.o differs
gcc/ipa-cp.o differs
gcc/tree-cfg.o differs
gcc/ipa-prop.o differs
gcc/cfgloop.o differs
gcc/tree-chkp.o differs
gcc/ipa-comdats.o differs
gcc/tree-vectorizer.o differs
gcc/postreload.o differs
gcc/lto-streamer-in.o differs
gcc/build/genmatch.o differs
gcc/ipa-icf-gimple.o differs
gcc/cfg.o differs
gcc/optabs.o differs
gcc/tsan.o differs
gcc/var-tracking.o differs
gcc/loop-unroll.o differs
gcc/cp/pt.o differs
gcc/cp/parser.o differs
gcc/cp/typeck2.o differs
gcc/cp/decl.o differs
gcc/cp/rtti.o differs
gcc/cp/call.o differs
gcc/cp/init.o differs
gcc/cp/cp-array-notation.o differs
gcc/cp/name-lookup.o differs
gcc/cp/constexpr.o differs
gcc/cp/semantics.o differs
gcc/tree-ssa-loop-niter.o differs
isl/isl_arg.o differs
isl/isl_ilp.o differs
isl/isl_tab_pip.o differs
isl/isl_space.o differs
isl/isl_transitive_closure.o differs
isl/isl_stream.o differs
isl/isl_output.o differs
libiberty/d-demangle.o differs
libiberty/pic/d-demangle.o differs
mpfr/lngamma.o differs
mpfr/gamma.o differs
Makefile:22563: recipe for target 'compare' failed
make[2]: *** [compare] Error 1
make[2]: Leaving directory '/build/gcc/obj'
Makefile:22542: recipe for target 'stage3-bubble' failed
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory '/build/gcc/obj'
Makefile:22605: recipe for target 'bootstrap' failed
make: *** [bootstrap] Error 2
