Dear developers I thought M4 was dead, but it seems I am wrong. I update my background(buildtools, clients, MonetDB) and everything compiles. However, M4 compilation gave this error: tDB/gdk -I../../monet -I/ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/../../monet -DLIBSTREAMS -Wall -Wextra -std=c99 -g -Werror-implicit-function-declaration -Werror -Wpointer-arith -Wdeclaration-after-statement -D_REENTRANT -c streams.c -fPIC -DPIC -o .libs/lib_streams_la-streams.o /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx: In function 'stream_socket_rstream': /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx:220: error: implicit declaration of function 'socket_rstream' cc1: warnings being treated as errors /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx:220: warning: assignment makes pointer from integer without a cast /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx: In function 'stream_socket_wstream': /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx:220: error: implicit declaration of function 'socket_wstream' /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx:220: warning: assignment makes pointer from integer without a cast /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx: In function 'stream_socket_rastream': /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx:220: error: implicit declaration of function 'socket_rastream' /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx:220: warning: assignment makes pointer from integer without a cast /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx: In function 'stream_socket_wastream': /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx:220: error: implicit declaration of function 'socket_wastream' /ufs/goncalve/MonetDB/MonetDB4/src/modules/plain/streams.mx:220: warning: assignment makes pointer from integer without a cast make[6]: *** [lib_streams_la-streams.lo] Error 1 Any idea? Regards, Romulo