patch 7.4.1437
Problem: Old system doesn't have isinf() and NAN. (Ben Fritz)
Solution: Adjust #ifdefs. Detect isnan() and isinf() functions with
configure. Use a replacement when missing. (Kazunobu Kuriyama)
diff --git a/src/configure.in b/src/configure.in
index fbfa37f..c809427 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -3146,6 +3146,7 @@
AC_CHECK_TYPE(ino_t, long)
AC_CHECK_TYPE(dev_t, unsigned)
AC_C_BIGENDIAN(,,,)
+AC_C_INLINE
AC_MSG_CHECKING(for rlim_t)
if eval "test \"`echo '$''{'ac_cv_type_rlim_t'+set}'`\" = set"; then
@@ -3564,7 +3565,7 @@
setpgid setsid sigaltstack sigstack sigset sigsetjmp sigaction \
sigvec strcasecmp strerror strftime stricmp strncasecmp \
strnicmp strpbrk strtol tgetent towlower towupper iswupper \
- usleep utime utimes)
+ usleep utime utimes isnan isinf)
AC_FUNC_FSEEKO
dnl define _LARGE_FILES, _FILE_OFFSET_BITS and _LARGEFILE_SOURCE when