dnl ** check for POSIX regex
HavePosixRegex=NO
-AC_CHECK_HEADER(regex.h,[AC_CHECK_FUNC(regcomp, [HavePosixRegex=YES])])
+AC_CHECK_HEADERS(regex.h,[AC_CHECK_FUNC(regcomp, [HavePosixRegex=YES])])
AC_SUBST(HavePosixRegex)
dnl ** how do we get a timezone name, and UTC offset ?
FPTOOLS_CHECK_HTYPE(nlink_t)
FPTOOLS_CHECK_HTYPE(ssize_t)
FPTOOLS_CHECK_HTYPE(rlim_t)
+FPTOOLS_CHECK_HTYPE(wint_t)
dnl ** Map OpenGL data types to Haskell types
if test $GhcLibsWithHOpenGL = YES ; then