Hi, I tried to build MonetDB from source on the Alpine Linux. But build process was stopped with the following message: merovingian.c: In function 'main': merovingian.c:835:51: error: 'S_IRWXO' undeclared (first use in this function) (e = openConnectionUNIX(&unsock, control_usock, S_IRWXO, _mero_ctlout)) == NO_ERR) { ^~~~~~~ merovingian.c:835:51: note: each undeclared identifier is reported only once for each function it appears in merovingian.c:862:9: error: 'S_IRWXG' undeclared (first use in this function) umask(S_IRWXG | S_IRWXO); ^~~~~~~ Steps to reproduce (inside the alpine:latest docker container): apk update apk add musl-dev gcc bison make python libressl-dev libxml2-dev xz-dev bzip2-dev lz4-dev readline-dev snappy-dev curl-dev pcre-dev unixodbc-dev libatomic_ops-dev wget wget https://www.monetdb.org/downloads/sources/Jul2017-SP1/MonetDB-11.27.5.tar.xz tar xvf MonetDB-11.27.5.tar.xz cd MonetDB-11.27.5/ ./configure make I found that S_IRWXO and S_IRWXG macro defined in /usr/include/sys/stat.h: egrep '(S_IRWXO|S_IRWXG)' /usr/include/sys/stat.h #define S_IRWXG 0070 #define S_IRWXO 0007 I found also that sys/stat.h included in merovingian.c: grep sys/stat.h /MonetDB-11.27.5/tools/merovingian/daemon/merovingian.c #include /* stat */ -- Regards Artem Klevtsov