At least one is really would like to cross-compile.

worber, the config site has to look like (sample for linux i?86, i.e. intel 32 bit, as host platform)
=================================
ac_cv_little_endian_double=yes
ac_cv_broken_sem_getvalue=no
ac_cv_computed_gotos=yes
ac_cv_buggy_getaddrinfo=no
ac_cv_working_tzset=yes
#next line require fix typo in configure.in
ac_cv_pthread=yes
ac_cv_pthread_system_supported=yes
ac_cv_tanh_preserves_zero_sign=yes

ac_cv_have_long_long_format=yes
ac_cv_file__dev_ptmx=yes
ac_cv_file__dev_ptc=no
=================================

Also with following patch into configure.in
=======================================
diff --git a/configure.in b/configure.in
--- a/configure.in
+++ b/configure.in
@@ -1372,7 +1372,7 @@
 # so we need to run a program to see whether it really made the
 # function available.
 AC_MSG_CHECKING(whether $CC accepts -pthread)
-AC_CACHE_VAL(ac_cv_thread,
+AC_CACHE_VAL(ac_cv_pthread,
 [ac_save_cc="$CC"
 CC="$CC -pthread"
 AC_RUN_IFELSE([AC_LANG_SOURCE([[
=======================================