+diff -u -r ../zip30/unix/configure ./unix/configure
+--- ../zip30/unix/configure 2008-06-20 05:32:20.000000000 +0200
++++ ./unix/configure 2017-07-07 08:53:36.218772657 +0200
+@@ -509,83 +509,6 @@
+ # Check for missing functions
+ # add NO_'function_name' to flags if missing
+
+-for func in rmdir strchr strrchr rename mktemp mktime mkstemp
+-do
+- echo Check for $func
+- echo "int main(){ $func(); return 0; }" > conftest.c
+- $CC $BFLAG -o conftest conftest.c >/dev/null 2>/dev/null
+- [ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_`echo $func | tr '[a-z]' '[A-Z]'`"
+-done
+-
+-
+-echo Check for memset
+-echo "int main(){ char k; memset(&k,0,0); return 0; }" > conftest.c
+-$CC -o conftest conftest.c >/dev/null 2>/dev/null
+-[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DZMEM"
+-
+-
+-echo Check for memmove
+-cat > conftest.c << _EOF_
+-#include <string.h>
+-int main() { int a; int b = 0; memmove( &a, &b, sizeof( a)); return a; }
+-_EOF_
+-$CC -o conftest conftest.c >/dev/null 2>/dev/null
+-[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNEED_MEMMOVE"
+-
+-
+-echo Check for strerror
+-cat > conftest.c << _EOF_
+-#include <string.h>
+-int main() { strerror( 0); return 0; }
+-_EOF_
+-$CC -o conftest conftest.c >/dev/null 2>/dev/null
+-[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNEED_STRERROR"
+-
+-echo Check for errno declaration
+-cat > conftest.c << _EOF_
+-#include <errno.h>
+-main()
+-{
+- errno = 0;
+- return 0;
+-}
+-_EOF_
+-$CC $CFLAGS -c conftest.c >/dev/null 2>/dev/null
+-[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_ERRNO"
+-
+-
+-echo Check for directory libraries
+-cat > conftest.c << _EOF_
+-int main() { return closedir(opendir(".")); }
+-_EOF_
+-
+-$CC -o conftest conftest.c >/dev/null 2>/dev/null
+-if [ $? -ne 0 ]; then
+- OPT=""
+- for lib in ndir dir ucb bsd BSD PW x dirent
+- do
+- $CC -o conftest conftest.c -l$lib >/dev/null 2>/dev/null
+- [ $? -eq 0 ] && OPT=-l$lib && break
+- done
+- if [ ${OPT} ]; then
+- LFLAGS2="${LFLAGS2} ${OPT}"
+- else
+- CFLAGS="${CFLAGS} -DNO_DIR"
+- fi
+-fi
+-
+-
+-# Dynix/ptx 1.3 needed this
+-
+-echo Check for readlink
+-echo "int main(){ return readlink(); }" > conftest.c
+-$CC -o conftest conftest.c >/dev/null 2>/dev/null
+-if [ $? -ne 0 ]; then
+- $CC -o conftest conftest.c -lseq >/dev/null 2>/dev/null
+- [ $? -eq 0 ] && LFLAGS2="${LFLAGS2} -lseq"
+-fi
+-
+-
+ echo Check for directory include file
+ OPT=""
+ for inc in dirent.h sys/ndir.h ndir.h sys/dir.h