build/pkgs/{numpy,scipy} [Cygwin]: Define _GNU_SOURCE

Author: Matthias Koeppe

build/pkgs/numpy/spkg-install.in

@@ -11,6 +11,11 @@ else
     export LDFLAGS="${LDFLAGS} -shared"
 fi
 
+if [ "$UNAME" = "CYGWIN" ]; then
+    # Trac #30643
+    export CPPFLAGS="${CPPFLAGS} -D_GNU_SOURCE"
+fi
+
 sage-python23 ../lapack_conf.py
 
 # Make sure that the fortran objects are compiled with -fPIC

build/pkgs/scipy/spkg-install.in

@@ -18,6 +18,12 @@ fi
 # Make sure that the fortran objects are compiled with -fPIC
 export FFLAGS="$FFLAGS -fPIC"
 export FCFLAGS="$FCFLAGS -fPIC"
+
+if [ "$UNAME" = "CYGWIN" ]; then
+    # Trac #30643
+    export CPPFLAGS="${CPPFLAGS} -D_GNU_SOURCE"
+fi
+
 if [ "$UNAME" = "CYGWIN" -a "$SAGE_DEBUG" = "yes" ]; then
     # Needed for just one or two modules when compiling in debug mode
     # Otherwise the debug symbols create too many sections in the binary