https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86331
Stephen Kim <stephen.kim at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |stephen.kim at oracle dot com
--- Comment #2 from Stephen Kim <stephen.kim at oracle dot com> ---
First of all, the error occurs sometimes but not always.
What is being called "the error" is as follows. Go run hello.go (just say
"hello!" with fmt.Println) sometimes fails to find gccgo itself. However, go
build with a cgo invokation sometimes fails to find cgo and sometimes succeed
with cgo but failed to locate gccgo. I assume that other go commands that
invoke any other subtool would have similar issues but with different error
messages.
Here is the example of failure with go run hello.go:
[aion1223@localhost gcc_upstream]$ go run /home/aion1223/hello.go
/home/aion1223/install/bin/gccgo: waitid: no such file or directory; output:
"Using built-in specs.\nCOLLECT_GCC=/home/aion1223/install/bin/gccgo\nTarget:
aarch64-unknown-linux-gnu\nConfigured with: ../configure
--enable-languages=c,c++,go --prefix=/home/aion1223/install\nThread model:
posix\ngcc version 9.0.0 20180627 (experimental) (GCC)
\nCOLLECT_GCC_OPTIONS='-c' '-shared-libgcc' '-mlittle-endian' '-mabi=lp64'\n
/home/aion1223/install/libexec/gcc/aarch64-unknown-linux-gnu/9.0.0/go1 - -quiet
-dumpbase - -mlittle-endian \"-mabi=lp64\" -auxbase -
-L/home/aion1223/install/lib/gcc/aarch64-unknown-linux-gnu/9.0.0
-L/home/aion1223/install/lib/gcc/aarch64-unknown-linux-gnu/9.0.0/../../../../lib64
-L/lib/../lib64 -L/usr/lib/../lib64
-L/home/aion1223/install/lib/gcc/aarch64-unknown-linux-gnu/9.0.0/../../.. -o
/tmp/ccr66E5t.s\nCOLLECT_GCC_OPTIONS='-c' '-shared-libgcc' '-mlittle-endian'
'-mabi=lp64'\n as -EL \"-mabi=lp64\" -o -.o
/tmp/ccr66E5t.s\nCOMPILER_PATH=/home/aion1223/install/libexec/gcc/aarch64-unknown-linux-gnu/9.0.0/:/home/aion1223/install/libexec/gcc/aarch64-unknown-linux-gnu/9.0.0/:/home/aion1223/install/libexec/gcc/aarch64-unknown-linux-gnu/:/home/aion1223/install/lib/gcc/aarch64-unknown-linux-gnu/9.0.0/:/home/aion1223/install/lib/gcc/aarch64-unknown-linux-gnu/\nLIBRARY_PATH=/home/aion1223/install/lib/gcc/aarch64-unknown-linux-gnu/9.0.0/:/home/aion1223/install/lib/gcc/aarch64-unknown-linux-gnu/9.0.0/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/home/aion1223/install/lib/gcc/aarch64-unknown-linux-gnu/9.0.0/../../../:/lib/:/usr/lib/\nCOLLECT_GCC_OPTIONS='-c'
'-shared-libgcc' '-mlittle-endian' '-mabi=lp64'\n"
Here are examples of failure with go build that requires cgo:
$ cat ce.go
package main
import "fmt"
/*
const unsigned long long int neg = (const unsigned long long int) -1;
*/
import "C"
func main() {
var i uint64
i = uint64(C.neg)
fmt.Println(i)
}
[aion1223@localhost ~]$ rm -fr ~/.cache/go-build; go build -x ~/ce.go
WORK=/tmp/go-build421481847
mkdir -p $WORK/b001/
cd $WORK
/home/aion1223/install/bin/gccgo -fsplit-stack -c -x c - || true
cd /home/aion1223
CGO_LDFLAGS='"-g" "-O2"'
./install/libexec/gcc/aarch64-unknown-linux-gnu/9.0.0/cgo -objdir $WORK/b001/
-importpath command-line-arguments -gccgo -- -I $WORK/b001/ -g -O2 ./ce.go
# command-line-arguments
waitid: no such file or directory
[aion1223@localhost ~]$ rm -fr ~/.cache/go-build; go build -x ~/ce.go
WORK=/tmp/go-build170944385
go tool cgo: waitid: no such file or directory
cgo version go1.10.3 gccgo (GCC) 9.0.0 20180627 (experimental)
[aion1223@localhost ~]$ rm -fr ~/.cache/go-build; go build -x ~/ce.go
WORK=/tmp/go-build774257621
mkdir -p $WORK/b001/
cd $WORK
/home/aion1223/install/bin/gccgo -fsplit-stack -c -x c - || true
cd /home/aion1223
CGO_LDFLAGS='"-g" "-O2"'
./install/libexec/gcc/aarch64-unknown-linux-gnu/9.0.0/cgo -objdir $WORK/b001/
-importpath command-line-arguments -gccgo -- -I $WORK/b001/ -g -O2 ./ce.go
cd $WORK
gcc -fno-caret-diagnostics -c -x c - || true
gcc -Qunused-arguments -c -x c - || true
gcc -fdebug-prefix-map=a=b -c -x c - || true
gcc -gno-record-gcc-switches -c -x c - || true
cd $WORK/b001
gcc -I /home/aion1223 -fPIC -pthread -fmessage-length=0
-fdebug-prefix-map=$WORK/b001=/tmp/go-build -gno-record-gcc-switches
-funwind-tables -I ./ -g -O2 -o ./_x001.o -c _cgo_export.c
gcc -I /home/aion1223 -fPIC -pthread -fmessage-length=0
-fdebug-prefix-map=$WORK/b001=/tmp/go-build -gno-record-gcc-switches
-funwind-tables -I ./ -g -O2 -o ./_x002.o -c ce.cgo2.c
cd $WORK
gcc -fsplit-stack -c -x c - || true
cd /home/aion1223
gcc -Wall -g -I $WORK/b001/ -I ./install/pkg/include -o $WORK/b001/_cgo_defun.o
-D GOOS_linux -D GOARCH_arm64 -fdebug-prefix-map=$WORK=/tmp/go-build
-gno-record-gcc-switches -c $WORK/b001/_cgo_defun.c
cd $WORK
/home/aion1223/install/bin/gccgo -fgo-importcfg=/dev/null -c -x c - || true
cd /home/aion1223
./install/bin/gccgo -c -g -fdebug-prefix-map=$WORK=/tmp/go-build
-gno-record-gcc-switches -fgo-relative-import-path=_/home/aion1223 -o
$WORK/b001/_go_.o -I $WORK/b001/_importcfgroot_ $WORK/b001/_cgo_gotypes.go
$WORK/b001/ce.cgo1.go
# command-line-arguments
./ce.go:13:10: error: integer constant overflow
i = uint64(C.neg)
^
Please, note that the last command was successful. However, the two fails show
difference in standard error.
I am going to attach now the strace -f log. I am trying to build docker itself
with gccgo as part of my work with my employer. However, this bug seems to be
just a show stopper.
