Test for POSIX.1c 2-arg sigwait() and fail on single-arg version.
Test for POSIX.1c 2-arg sigwait() and fail on single-arg version.

postmind-net/postgres-xl,ahachete/gpdb,kmjungersen/PostgresXL,cjcjameson/gpdb,tangp3/gpdb,adam8157/gpdb,50wu/gpdb,techdragon/Postgres-XL,rvs/gpdb,randomtask1155/gpdb,tangp3/gpdb,randomtask1155/gpdb,foyzur/gpdb,lisakowen/gpdb,xinzweb/gpdb,foyzur/gpdb,lintzc/gpdb,rvs/gpdb,ovr/postgres-xl,adam8157/gpdb,chrishajas/gpdb,kmjungersen/PostgresXL,chrishajas/gpdb,CraigHarris/gpdb,kmjungersen/PostgresXL,CraigHarris/gpdb,xuegang/gpdb,Quikling/gpdb,janebeckman/gpdb,zaksoup/gpdb,xuegang/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,rvs/gpdb,rubikloud/gpdb,Quikling/gpdb,ashwinstar/gpdb,zeroae/postgres-xl,techdragon/Postgres-XL,xinzweb/gpdb,50wu/gpdb,Chibin/gpdb,oberstet/postgres-xl,arcivanov/postgres-xl,tangp3/gpdb,xinzweb/gpdb,lpetrov-pivotal/gpdb,yuanzhao/gpdb,50wu/gpdb,kaknikhil/gpdb,cjcjameson/gpdb,oberstet/postgres-xl,yuanzhao/gpdb,lpetrov-pivotal/gpdb,rubikloud/gpdb,atris/gpdb,arcivanov/postgres-xl,zeroae/postgres-xl,techdragon/Postgres-XL,janebeckman/gpdb,yuanzhao/gpdb,yazun/postgres-xl,tpostgres-projects/tPostgres,yuanzhao/gpdb,atris/gpdb,50wu/gpdb,yazun/postgres-xl,Chibin/gpdb,lpetrov-pivotal/gpdb,kaknikhil/gpdb,royc1/gpdb,Postgres-XL/Postgres-XL,ovr/postgres-xl,atris/gpdb,janebeckman/gpdb,atris/gpdb,lisakowen/gpdb,atris/gpdb,yuanzhao/gpdb,royc1/gpdb,randomtask1155/gpdb,Quikling/gpdb,yuanzhao/gpdb,snaga/postgres-xl,ashwinstar/gpdb,janebeckman/gpdb,tpostgres-projects/tPostgres,yuanzhao/gpdb,kmjungersen/PostgresXL,CraigHarris/gpdb,techdragon/Postgres-XL,lisakowen/gpdb,adam8157/gpdb,greenplum-db/gpdb,ahachete/gpdb,ahachete/gpdb,chrishajas/gpdb,jmcatamney/gpdb,foyzur/gpdb,xinzweb/gpdb,edespino/gpdb,cjcjameson/gpdb,xuegang/gpdb,kaknikhil/gpdb,50wu/gpdb,xinzweb/gpdb,tangp3/gpdb,lintzc/gpdb,adam8157/gpdb,postmind-net/postgres-xl,xuegang/gpdb,0x0FFF/gpdb,cjcjameson/gpdb,lintzc/gpdb,rvs/gpdb,ahachete/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,lintzc/gpdb,kaknikhil/gpdb,yazun/postgres-xl,zeroae/postgres-xl,tangp3/gpdb,cjcjameson/gpdb,Quikling/gpdb,CraigHarris/gpdb,0x0FFF/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,janebeckman/gpdb,foyzur/gpdb,chrishajas/gpdb,janebeckman/gpdb,edespino/gpdb,randomtask1155/gpdb,randomtask1155/gpdb,royc1/gpdb,foyzur/gpdb,xuegang/gpdb,postmind-net/postgres-xl,zeroae/postgres-xl,yuanzhao/gpdb,rubikloud/gpdb,Quikling/gpdb,edespino/gpdb,oberstet/postgres-xl,Quikling/gpdb,Chibin/gpdb,lisakowen/gpdb,jmcatamney/gpdb,rvs/gpdb,janebeckman/gpdb,rubikloud/gpdb,postmind-net/postgres-xl,ahachete/gpdb,foyzur/gpdb,edespino/gpdb,zaksoup/gpdb,edespino/gpdb,CraigHarris/gpdb,tpostgres-projects/tPostgres,xinzweb/gpdb,kmjungersen/PostgresXL,50wu/gpdb,snaga/postgres-xl,adam8157/gpdb,adam8157/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,rubikloud/gpdb,edespino/gpdb,0x0FFF/gpdb,Quikling/gpdb,rubikloud/gpdb,zaksoup/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,rvs/gpdb,cjcjameson/gpdb,rubikloud/gpdb,Postgres-XL/Postgres-XL,xuegang/gpdb,CraigHarris/gpdb,xuegang/gpdb,ashwinstar/gpdb,zeroae/postgres-xl,arcivanov/postgres-xl,pavanvd/postgres-xl,lisakowen/gpdb,lintzc/gpdb,royc1/gpdb,lpetrov-pivotal/gpdb,arcivanov/postgres-xl,lisakowen/gpdb,foyzur/gpdb,lpetrov-pivotal/gpdb,kaknikhil/gpdb,Chibin/gpdb,chrishajas/gpdb,xinzweb/gpdb,jmcatamney/gpdb,xinzweb/gpdb,tangp3/gpdb,pavanvd/postgres-xl,jmcatamney/gpdb,edespino/gpdb,Chibin/gpdb,techdragon/Postgres-XL,pavanvd/postgres-xl,kaknikhil/gpdb,kaknikhil/gpdb,zaksoup/gpdb,pavanvd/postgres-xl,0x0FFF/gpdb,rvs/gpdb,janebeckman/gpdb,randomtask1155/gpdb,royc1/gpdb,janebeckman/gpdb,kaknikhil/gpdb,snaga/postgres-xl,lpetrov-pivotal/gpdb,edespino/gpdb,Chibin/gpdb,0x0FFF/gpdb,lpetrov-pivotal/gpdb,oberstet/postgres-xl,ovr/postgres-xl,Chibin/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,lisakowen/gpdb,50wu/gpdb,kaknikhil/gpdb,randomtask1155/gpdb,xuegang/gpdb,Quikling/gpdb,0x0FFF/gpdb,ashwinstar/gpdb,Postgres-XL/Postgres-XL,edespino/gpdb,rvs/gpdb,adam8157/gpdb,Quikling/gpdb,rvs/gpdb,rvs/gpdb,arcivanov/postgres-xl,tpostgres-projects/tPostgres,snaga/postgres-xl,Chibin/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,adam8157/gpdb,tpostgres-projects/tPostgres,xuegang/gpdb,ahachete/gpdb,zaksoup/gpdb,royc1/gpdb,chrishajas/gpdb,edespino/gpdb,chrishajas/gpdb,tangp3/gpdb,randomtask1155/gpdb,jmcatamney/gpdb,snaga/postgres-xl,atris/gpdb,atris/gpdb,Postgres-XL/Postgres-XL,yazun/postgres-xl,Postgres-XL/Postgres-XL,Chibin/gpdb,ovr/postgres-xl,Quikling/gpdb,zaksoup/gpdb,ahachete/gpdb,royc1/gpdb,rubikloud/gpdb,zaksoup/gpdb,greenplum-db/gpdb,50wu/gpdb,ahachete/gpdb,Chibin/gpdb,zaksoup/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,CraigHarris/gpdb,yazun/postgres-xl,ovr/postgres-xl,ashwinstar/gpdb,lintzc/gpdb,atris/gpdb,0x0FFF/gpdb,chrishajas/gpdb,oberstet/postgres-xl,foyzur/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,tangp3/gpdb,lpetrov-pivotal/gpdb,greenplum-db/gpdb,janebeckman/gpdb,lintzc/gpdb,lisakowen/gpdb,lintzc/gpdb,arcivanov/postgres-xl,royc1/gpdb,postmind-net/postgres-xl,0x0FFF/gpdb,lintzc/gpdb