Lighttpd

lighttpd 1.4.43 fails to build on OS X 10.11 El Capitan:

libtool: compile:  ccache /usr/bin/clang -DHAVE_CONFIG_H -DHAVE_VERSION_H -DLIBRARY_DIR=\"/opt/local/lib\" -DSBIN_DIR=\"/opt/local/sbin\" -I. -I.. -I/opt/local/include -D_REENTRANT -D__EXTENSIONS__ -I/opt/local/include -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGE_FILES -pipe -Os -arch x86_64 -Wall -W -Wshadow -pedantic -std=gnu99 -MT mod_cgi.lo -MD -MP -MF .deps/mod_cgi.Tpo -c mod_cgi.c  -fno-common -DPIC -o .libs/mod_cgi.o
mod_cgi.c:1083:6: warning: implicit declaration of function 'pipe2' is invalid in C99 [-Wimplicit-function-declaration]
        if (pipe_cloexec(to_cgi_fds)) {
            ^
mod_cgi.c:40:30: note: expanded from macro 'pipe_cloexec'
#define pipe_cloexec(pipefd) pipe2((pipefd), O_CLOEXEC)
                             ^
1 warning generated.
mv -f .deps/mod_cgi.Tpo .deps/mod_cgi.Plo
/bin/sh ../libtool  --tag=CC   --mode=link ccache /usr/bin/clang   -pipe -Os -arch x86_64 -Wall -W -Wshadow -pedantic -std=gnu99 -module -export-dynamic -avoid-version -no-undefined -L/opt/local/lib -Wl,-headerpad_max_install_names -arch x86_64 -o mod_cgi.la -rpath /opt/local/lib mod_cgi.lo liblightcomp.la 
libtool: link: ccache /usr/bin/clang  -o .libs/mod_cgi.so -bundle  .libs/mod_cgi.o   -L/opt/local/lib ./.libs/liblightcomp.dylib -lpcre -lssl -lcrypto -lev  -Os -arch x86_64 -Wl,-headerpad_max_install_names -arch x86_64  
Undefined symbols for architecture x86_64:
  "_pipe2", referenced from:
      _mod_cgi_handle_subrequest in mod_cgi.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [mod_cgi.la] Error 1