audio/moc is using autotools to check for some Posix support, but that
in turn disable the SIGWINCH signal, which only recently became part of
Posix.

I don't know if my diff is the correct way to reenable it. But it was the
quickest for me. And it didn't impact music playback in my quick test.

diff --git audio/moc/Makefile audio/moc/Makefile
index f74e77135..48d98e1c2 100644
--- audio/moc/Makefile
+++ audio/moc/Makefile
@@ -3,7 +3,7 @@ COMMENT =       console audio player
 DIST_TUPLE+=   gitlab tomaszg mocp fb0a63b564b40fa861204e2f804b696c6ee573da .
 PKGNAME =      moc-2.6alpha3
 CATEGORIES =   audio
-REVISION =     4
+REVISION =     5
 
 # GPLv3+
 PERMIT_PACKAGE = Yes
@@ -70,7 +70,7 @@ CONFIGURE_ARGS += \
                --with-magic \
                --with-ltdl-include=${LOCALBASE}/include \
                --with-ltdl-lib=${LOCALBASE}/lib
-CONFIGURE_ENV = CPPFLAGS="-Wno-unused-but-set-parameter -I${LOCALBASE}/include" \
+CONFIGURE_ENV = CPPFLAGS="-D_BSD_SOURCE=1 -Wno-unused-but-set-parameter -I${LOCALBASE}/include" \
                LDFLAGS="-L${LOCALBASE}/lib"
 
 pre-install: