http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51264
Bug #: 51264
Summary: O0 Bootstrap failure: control reaches end of non-void
function
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: vr...@gcc.gnu.org
This might be a duplicate of PR20681, but I'm filing it just in case it's not.
During a x86-64 -O0 bootstrap, the 3rd stage fails with:
...
In function 'hashval_t iterative_hash_expr(const_tree, hashval_t)':
/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/gcc/tree.c:6999:1:
error: control reaches end of non-void function [-Werror=return-type]
cc1plus: all warnings being treated as errors
...
full command line:
...
/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/gcc-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/./prev-gcc/g++
-B/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/gcc-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/./prev-gcc/
-B/opt/codesourcery/x86_64-unknown-linux-gnu/bin/ -nostdinc++
-B/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/gcc-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/prev-x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs
-B/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/gcc-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/prev-x86_64-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/gcc-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/prev-x86_64-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/gcc-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/prev-x86_64-unknown-linux-gnu/libstdc++-v3/include
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/libstdc++-v3/libsupc++
-L/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/gcc-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/prev-x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs
-L/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/gcc-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/prev-x86_64-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
-c -g -O0 -gtoggle -DIN_GCC -fno-exceptions -fno-rtti -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common
-DHAVE_CONFIG_H -I. -I.
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/gcc
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/gcc/.
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/gcc/../include
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/gcc/../libcpp/include
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr/include
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr/include
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr/include
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/gcc/../libdecnumber
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/gcc/../libdecnumber/bid
-I../libdecnumber
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr/include
-I/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr/include
/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/gcc/tree.c -o
tree.o/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/gcc/tree.c: In
function 'hashval_t iterative_hash_expr(const_tree, hashval_t)':
/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/gcc/tree.c:6999:1:
error: control reaches end of non-void function [-Werror=return-type]
cc1plus: all warnings being treated as errors
...
configure line:
...
Configured with:
/scratch/vries/b2/ref-x86_64-ml-11-11-21/src/gcc-mainline/configure
--build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu
--target=x86_64-unknown-linux-gnu --enable-threads --disable-libmudflap
--disable-libssp --disable-libstdcxx-pch --enable-checking=yes,rtl
--disable-multilib --with-gnu-as --with-gnu-ld --enable-languages=c,c++
--enable-shared --enable-lto --disable-nls --prefix=/opt/codesourcery
--with-gmp=/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr
--with-mpfr=/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr
--with-mpc=/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr
--with-ppl=/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr
--with-host-libstdcxx='-L/usr/local/tools/gcc-4.3.3/lib64 -static-libgcc
-Wl,-Bstatic,-lstdc++,-Bdynamic -lm'
--with-cloog=/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr
--with-libelf=/scratch/vries/b2/ref-x86_64-ml-11-11-21/obj/host-libs-mainline-0-x86_64-unknown-linux-gnu-x86_64-unknown-linux-gnu/usr
--disable-libgomp
--with-build-time-tools=/scratch/vries/b2/ref-x86_64-ml-11-11-21/install/x86_64-unknown-linux-gnu/bin
--with-build-time-tools=/scratch/vries/b2/ref-x86_64-ml-11-11-21/install/x86_64-unknown-linux-gnu/bin
...
I hit the problem with r181586.
