more build trouble

[Jason Stover]

New checkout, new gnulib, OpenBSD + x86:

 gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I ./src/libpspp -I./gl -I./gl 
-DINSTALLDIR=\"/usr/local/bin\" -DDOCDIR=\"/usr/local/share/doc/pspp\" -I./src 
-I./lib -DPKGDATADIR=\"/usr/local/share/pspp\" -I./src/language/stats 
-I./src/language/expressions -I./src/language/expressions -I/usr/local/include 
-Wall -W -Wwrite-strings -Wstrict-prototypes -Wpointer-arith -Wno-sign-compare 
-Wmissing-prototypes -g -O2 -MT src/libpspp/src_libpspp_libpspp_la-getl.lo -MD 
-MP -MF src/libpspp/.deps/src_libpspp_libpspp_la-getl.Tpo -c src/libpspp/getl.c 
 -fPIC -DPIC -o src/libpspp/.libs/src_libpspp_libpspp_la-getl.o
In file included from gl/unistd.h:54,
                 from gl/stdlib.h:271,
                 from src/libpspp/getl.c:17:
gl/getopt.h:178: error: redefinition of `struct option'
*** Error code 1