Bug#1122137: apache2 FTCBFS: uses AC_RUN_IFELSE

[Helmut Grohne <helmut@subdivi.de>]

Source: apache2
Version: 2.4.66-1
Tags: patch upstream
User: debian-cross@lists.debian.org
Usertags: ftcbfs

Thanks for applying my earlier cross build patches. Now with the new
upstream release, there is a new cross build regression. A use of
AC_RUN_IFELSE was introduced and that cannot possibly work during a
cross build. Fortunately, what is being tested is sizes of data types
and AC_CHECK_SIZEOF has been made compatible with cross building in a
creative way. (In a native build it indeed runs stuff, but for cross
building it uses compilation bisection to discover the size.) Employing
that macro, we may perform the same check. I'm attaching a patch for
your convenience.

Please consider applying the patch and also forwarding it upstream
together with the patch that already is being applied. Both patches are
beneficial to other distributions such as Yocto or PtxDist.

Helmut

Index: apache2-2.4.66/acinclude.m4
===================================================================
--- apache2-2.4.66.orig/acinclude.m4
+++ apache2-2.4.66/acinclude.m4
@@ -721,16 +721,9 @@ dnl Checks if the size of a void pointer
 dnl integer type.
 dnl
 AC_DEFUN([APACHE_CHECK_VOID_PTR_LEN], [
-
-AC_CACHE_CHECK([for void pointer length], [ap_cv_void_ptr_lt_long],
-[AC_TRY_RUN([
-int main(void)
-{
-    return sizeof(void *) < sizeof(long); 
-}], [ap_cv_void_ptr_lt_long=no], [ap_cv_void_ptr_lt_long=yes], 
-    [ap_cv_void_ptr_lt_long=yes])])
-
-if test "$ap_cv_void_ptr_lt_long" = "yes"; then
+AC_CHECK_SIZEOF([void *])
+AC_CHECK_SIZEOF([long])
+if test "$ac_cv_sizeof_void_p" -lt "$ac_cv_sizeof_long"; then
     AC_MSG_ERROR([Size of "void *" is less than size of "long"])
 fi
 ])