The build needs -std=c99: error: ‘for’ loop initial declaration used outside C99 mode

[barracuda156]

make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_pacparser/pacparser/work/pacparser-1.4.5/src/spidermonkey/js/src'
find js/src -name "jsautocfg.h" -exec cp {} js/src \;
cp: js/src/jsautocfg.h and js/src/jsautocfg.h are identical (not copied).
touch js-buildstamp
make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_pacparser/pacparser/work/pacparser-1.4.5/src/spidermonkey'
touch jsapi_buildstamp
cc -g -DXP_UNIX -Wall -DVERSION= -Ispidermonkey/js/src   -c pacparser.c -o pacparser.o
pacparser.c: In function ‘resolve_host’:
pacparser.c:162: error: ‘for’ loop initial declaration used outside C99 mode
make: *** [pacparser.o] Error 1
make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_pacparser/pacparser/work/pacparser-1.4.5/src'
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_pacparser/pacparser/work/pacparser-1.4.5/src" && /usr/bin/make -j6 -w all 
Exit code: 2
Error: Failed to build pacparser: command execution failed