make doesn't work in NFS directory due to flock

[clange]

I tried to build Node.js in my home directory on a university computer. The home partition is mounted as follows:

HOST:/vol/vol1/staff on /home/staff type nfs (rw,nosuid,hard,intr,actimeo=120,sloppy,vers=4,addr=IP,clientaddr=CLIENTIP)

The build process failed at some point saying:

  flock /home/staff/langec/download/node-v0.8.11/out/Release/linker.lock g++ -pthread -rdy
namic -m64  -o /home/staff/langec/download/node-v0.8.11/out/Release/mksnapshot -Wl,--start
-group /home/staff/langec/download/node-v0.8.11/out/Release/obj.target/mksnapshot/deps/v8/
src/mksnapshot.o /home/staff/langec/download/node-v0.8.11/out/Release/obj.target/deps/v8/t
ools/gyp/libv8_base.a /home/staff/langec/download/node-v0.8.11/out/Release/obj.target/deps
/v8/tools/gyp/libv8_nosnapshot.a -Wl,--end-group 
flock: /home/staff/langec/download/node-v0.8.11/out/Release/linker.lock: Input/output erro
r
make[1]: *** [/home/staff/langec/download/node-v0.8.11/out/Release/mksnapshot] Error 65
make[1]: Leaving directory `/home/staff/langec/download/node-v0.8.11/out'
make: *** [node] Error 2

This is because NFS doesn't support this kind of file locking.

Building in /tmp and then copying to the actual target directory worked.

[TooTallNate]

You can probably work around this by invoking make like:

$ LINK=g++ make

[bnoordhuis]

Noted, though there is not much we can (or should) do about that except for documenting the workaround that @TooTallNate described.

In theory, file locks work with NFS v4 but they're kind of spotty in practice - the failure cases are both interesting and numerous.