www/serf tty misbehavior

[Greg Troxel <gdt%ir.bbn.com@localhost>]

When building www/serf by 

  make &> OUT& # in bash, but I don't think that matters

then after a bit it hangs (as shown by tail -f OUT) after

  gcc -o buckets/file_buckets.os -c -O2 -I/usr/pkg/include/apr-1
  -I/usr/pkg/include -I/usr/include -std=c89 -Wdeclaration-after-statement
  -Wmissing-prototypes -Wall -pthread -fPIC -DNDEBUG -DNETBSD
  -I. -I/usr/pkg/include/apr-1 -I/usr/pkg/lib/include
  buckets/file_buckets.c

and on inspection I see:

[2]+  9689 Stopped (tty output)    make &>OUT

and I noticed scons running.   I have seen the same bug with gpsd (not
in pkgsrc).  Does anyone understand the details?

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