Go link failure on Ubuntu 18.04 #94
Description
After updating to v0.26.1 of wasmtime-go, a project I work on started failing when running Go tests on Linux (Ubuntu 18.04).
/usr/local/go/pkg/tool/linux_amd64/link: running gcc failed: exit status 1
/root/go/pkg/mod/github.com/bytecodealliance/[email protected]/build/linux-x86_64/libwasmtime.a(rand-c9e73dea03c33dfe.rand.7g47d74v-cgu.8.rcgu.o): In function `_ZN3std4sync4once4Once9call_once28_$u7b$$u7b$closure$u7d$$u7d$17hd38fe0856a08c7c8E.llvm.16281869784479911949':
rand.7g47d74v-cgu.8:(.text._ZN3std4sync4once4Once9call_once28_$u7b$$u7b$closure$u7d$$u7d$17hd38fe0856a08c7c8E.llvm.16281869784479911949+0x1a): undefined reference to `pthread_atfork'
/root/go/pkg/mod/github.com/bytecodealliance/[email protected]/build/linux-x86_64/libwasmtime.a(rand-c9e73dea03c33dfe.rand.7g47d74v-cgu.8.rcgu.o): In function `_ZN4core3ops8function6FnOnce40call_once$u7b$$u7b$vtable.shim$u7d$$u7d$17h5210ace1770a56e9E.llvm.16281869784479911949':
rand.7g47d74v-cgu.8:(.text._ZN4core3ops8function6FnOnce40call_once$u7b$$u7b$vtable.shim$u7d$$u7d$17h5210ace1770a56e9E.llvm.16281869784479911949+0x1a): undefined reference to `pthread_atfork'
collect2: error: ld returned 1 exit status
Based on some research (here, here, and here), it looks like it might be fixed simply by adding -pthread to the LDFLAGS line in ffi.go (that solves the issue for me, but I'm unsure if it's 100% correct).