cmd/link: unresolvable R_RISCV_HI20 relocation against symbol `stderr@@GLIBC_2.27'

[BoyaoWang430]

Go version

1.23.2 linux amd64

Output of go env in your module/workspace:

GO111MODULE=''
GOARCH='riscv64'
GOBIN=''
GOCACHE='/workspace/build/.cache/go-build'
GOENV='/root/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/workspace/build/pkg/mod'
GOOS='linux'
GOPATH='/workspace/build'
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/workspace/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/workspace/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.23.2'
GODEBUG=''
GOTELEMETRY='local'
GOTELEMETRYDIR='/root/.config/go/telemetry'
GCCGO='gccgo'
GORISCV64='rva20u64'
AR='riscv64-unknown-linux-gnu-ar'
CC='riscv64-unknown-linux-gnu-gcc'
CXX='riscv64-unknown-linux-gnu-g++'
CGO_ENABLED='1'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -pthread -fmessage-length=0 -ffile-prefix-map=/workspace/tmp/go-build4021815613=/tmp/go-build -gno-record-gcc-switches'

What did you do?

I was compiling a large Go project, which includes cgo and has a Go cache size of approximately 15GB. Target arch is RISCV64. When linker called ld, there’s an issue related to glibc symbols.

What did you see happen?

/workspace/go/pkg/tool/linux_amd64/link: running riscv64-unknown-linux-gnu-g++ failed: exit status 1
/usr/local/bin/riscv64-unknown-linux-gnu-g++ -Wl,-z,now -Wl,-z,nocopyreloc -o $WORK/b001/exe/a.out -rdynamic -Wl,--compress-debug-sections=zlib /workspace/tmp/go-link-3293404590/go.o /workspace/tmp/go-link-3293404590/000000.o /workspace/tmp/go-link-3293404590/000001.o /workspace/tmp/go-link-3293404590/000002.o /workspace/tmp/go-link-3293404590/000003.o /workspace/tmp/go-link-3293404590/000004.o /workspace/tmp/go-link-3293404590/000005.o /workspace/tmp/go-link-3293404590/000006.o /workspace/tmp/go-link-3293404590/000007.o /workspace/tmp/go-link-3293404590/000008.o /workspace/tmp/go-link-3293404590/000009.o /workspace/tmp/go-link-3293404590/000010.o /workspace/tmp/go-link-3293404590/000011.o /workspace/tmp/go-link-3293404590/000012.o /workspace/tmp/go-link-3293404590/000013.o /workspace/tmp/go-link-3293404590/000014.o /workspace/tmp/go-link-3293404590/000015.o /workspace/tmp/go-link-3293404590/000016.o /workspace/tmp/go-link-3293404590/000017.o /workspace/tmp/go-link-3293404590/000018.o /workspace/tmp/go-link-3293404590/000019.o /workspace/tmp/go-link-3293404590/000020.o /workspace/tmp/go-link-3293404590/000021.o /workspace/tmp/go-link-3293404590/000022.o /workspace/tmp/go-link-3293404590/000023.o /workspace/tmp/go-link-3293404590/000024.o /workspace/tmp/go-link-3293404590/000025.o /workspace/tmp/go-link-3293404590/000026.o /workspace/tmp/go-link-3293404590/000027.o /workspace/tmp/go-link-3293404590/000028.o /workspace/tmp/go-link-3293404590/000029.o /workspace/tmp/go-link-3293404590/000030.o /workspace/tmp/go-link-3293404590/000031.o /workspace/tmp/go-link-3293404590/000032.o /workspace/tmp/go-link-3293404590/000033.o /workspace/tmp/go-link-3293404590/000034.o /workspace/tmp/go-link-3293404590/000035.o /workspace/tmp/go-link-3293404590/000036.o /workspace/tmp/go-link-3293404590/000037.o /workspace/tmp/go-link-3293404590/000038.o /workspace/tmp/go-link-3293404590/000039.o /workspace/tmp/go-link-3293404590/000040.o /workspace/tmp/go-link-3293404590/000041.o /workspace/tmp/go-link-3293404590/000042.o /workspace/tmp/go-link-3293404590/000043.o /workspace/tmp/go-link-3293404590/000044.o /workspace/tmp/go-link-3293404590/000045.o /workspace/tmp/go-link-3293404590/000046.o /workspace/tmp/go-link-3293404590/000047.o /workspace/tmp/go-link-3293404590/000048.o /workspace/tmp/go-link-3293404590/000049.o /workspace/tmp/go-link-3293404590/000050.o /workspace/tmp/go-link-3293404590/000051.o /workspace/tmp/go-link-3293404590/000052.o /workspace/tmp/go-link-3293404590/000053.o /workspace/tmp/go-link-3293404590/000054.o -O2 -g --sysroot=/usr/local/sysroot -lresolv -O2 -g --sysroot=/usr/local/sysroot -O2 -g --sysroot=/usr/local/sysroot -ldl -O2 -g --sysroot=/usr/local/sysroot -lpthread -O2 -g --sysroot=/usr/local/sysroot -O2 -g --sysroot=/usr/local/sysroot -O2 -g --sysroot=/usr/local/sysroot -ldl -ldl -O2 -g --sysroot=/usr/local/sysroot -ldl -O2 -g --sysroot=/usr/local/sysroot /workspace/build/pkg/mod/code.byted.org/iesarch/gozstd@v1.17.4/libzstd_linux_riscv64.a -no-pie
/usr/local/lib/gcc/riscv64-unknown-linux-gnu/13.2.1/../../../../riscv64-unknown-linux-gnu/bin/ld: unresolvable R_RISCV_HI20 relocation against symbol stderr@@GLIBC_2.27' /usr/local/lib/gcc/riscv64-unknown-linux-gnu/13.2.1/../../../../riscv64-unknown-linux-gnu/bin/ld: unresolvable R_RISCV_HI20 relocation against symbol stderr@@GLIBC_2.27'
/usr/local/lib/gcc/riscv64-unknown-linux-gnu/13.2.1/../../../../riscv64-unknown-linux-gnu/bin/ld: unresolvable R_RISCV_HI20 relocation against symbol `stderr@@GLIBC_2.27'
collect2: error: ld returned 1 exit status

What did you expect to see?

Maybe Go generated an incorrect relocation type for the symbol reference to stderr.

[gabyhelp]

Related Issues and Documentation

• cmd/link: RISC-V external link, failed to find text symbol for HI20 relocation #65646 (closed)
• cmd/compile: failed to make Go on riscv64 CPU with numa #61295 (closed)
• cmd/go: internal/test.test build faild on linux/loong64 #67538 (closed)
• runtime: goroutine stack exceeds 1000000000-byte limit #50263 (closed)
• cmd/cgo: internal linker's implicit dependency on gcc_s #59735
• cmd/build: linker error while cross-compiling to riscv64 in go1.15 #45466 (closed)
• runtime,cmd/compile: build errors with "relocation truncated to fit" on linux-riscv-unmatched as of CL 345051 #48791 (closed)
• cmd/go: cannot link with CGO_ENABLED=1 on mips64 #55096 (closed)
• cmd/dist: I/O error: read src/xxx.go: is a directory #35776 (closed)
• cmd/link: signal SIGBUS: bus error during linking with sufficient disk space #41473 (closed)

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[mengzhuo]

It looks like a mis-configuration on cross compile environment. that glibc didn't contains stderr@@GLIBC_2.27

[BoyaoWang430]

It looks like a mis-configuration on cross compile environment. that glibc didn't contains stderr@@GLIBC_2.27

I can find the symbol stderr@@GLIBC_2.27 in my RISCV libc.so.
`file /usr/local/sysroot/lib/libc.so.6

/usr/local/sysroot/lib/libc.so.6: ELF 64-bit LSB pie executable, UCB RISC-V, version 1 (GNU/Linux), dynamically linked, interpreter /lib/ld-linux-riscv64-lp64d.so.1, for GNU/Linux 4.15.0, with debug_info, not stripped

readelf -s /usr/local/sysroot/lib/libc.so.6 | grep stderr

146: 000000000014c398 224 OBJECT GLOBAL DEFAULT 29 IO_2_1_stderr@@GLIBC_2.27

1771: 000000000014c558 8 OBJECT GLOBAL DEFAULT 29 stderr@@GLIBC_2.27

9353: 000000000014c398 224 OBJECT GLOBAL DEFAULT 29 IO_2_1_stderr

9538: 000000000014c558 8 OBJECT GLOBAL DEFAULT 29 stderr`

[BoyaoWang430]

After I removed the option " -Wl,-z,nocopyreloc" added by golang in src/cmd/link/internal/ld/lib.go:1654, I can successfully link the file now.

      if ctxt.IsELF && ctxt.DynlinkingGo() {
            // Do not let the host linker generate COPY relocations. These
            // can move symbols out of sections that rely on stable offsets
            // from the beginning of the section (like sym.STYPE).
            argv = append(argv, "-Wl,-z,nocopyreloc")

[mknyszek]

CC @golang/riscv64