Without this eval, upon test success the corresponding actions
(like defining corresponding variables) are not taken.
Found by Timur I. Bakeyev, and based on his patch for 3.5.
(cherry picked from commit
0ef506d4f31d206c300e4f3f326edac2b60bdc15)
eval AS_TR_SH([ac_cv_c_prototype_$1])=no
])
)
-AS_IF([test $AS_TR_SH([ac_cv_c_prototype_$1]) = yes],[$3],[$4])
+AS_IF([eval test $AS_TR_SH([ac_cv_c_prototype_$1]) = yes],[$3],[$4])
])
AC_DEFUN(LIBREPLACE_PROVIDE_HEADER,