build: Use «yes» instead of «true» for AC_CHECK_FUNCS cache value This autoconf macro sets the ac_cv_func_ cached variable to «yes» not «true» so we were checking for an impossible condition.
diff --git a/configure.ac b/configure.ac
index 17d113c..842f5d6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -246,7 +246,7 @@ AC_LINK_IFELSE(
AC_CHECK_FUNCS([clearenv dirfd fopencookie __fpurge \
getauxval getentropy getexecname getline \
pstat_getproc sysconf])
-AM_CONDITIONAL([HAVE_GETENTROPY], [test "x$ac_cv_func_getentropy" = "xtrue"])
+AM_CONDITIONAL([HAVE_GETENTROPY], [test "x$ac_cv_func_getentropy" = "xyes"])
AC_SUBST([MD5_LIBS])
AC_SUBST([LIBBSD_LIBS])