autofs won't cross-compile

[Paul Smith <psmith@netezza.com>]

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Hi all; autofs's configure.in is not properly set up to allow for
cross-compiling.  It fails trying to detect -fPIE, because configure.in
runs AC_RUN_IFELSE to run a program (which of course can't work during
cross-compilation) and does not provide a cross-compilation result.

I'm not sure why this test for PIE exists or if it's really needed, but
if you want to keep it please add an argument for cross-compilation.
Patch is attached, against 4.1.4 (but I checked 5.00beta1 and it had the
same issue).  As recommended by the autoconf manual, this patch is
pessimistic and assumes no PIE support for all cross-compilation
environments.

I've split the patch into two: one for configure.in and one for
configure itself (I'm not sure if you source code control the configure
script: some projects do and some don't).

Cheers!

-- 
-----------------------------------------------------------------------------
 Paul D. Smith <psmith@netezza.com>                       http://netezza.com
 "Please remain calm--I may be mad, but I am a professional."--Mad Scientist
-----------------------------------------------------------------------------
      These are my opinions--Netezza takes no responsibility for them.

[-- Attachment #2: autofs-1.patch --]
[-- Type: text/x-patch, Size: 549 bytes --]

--- autofs-4.1.4-old/configure.in	2005-04-06 11:24:37.000000000 -0400
+++ autofs-4.1.4/configure.in	2006-11-07 13:59:42.895680583 -0500
@@ -140,7 +140,8 @@
 DAEMON_LDFLAGS=
 AC_MSG_CHECKING([whether gcc -fPIE works])
 AC_RUN_IFELSE([AC_LANG_PROGRAM([[]], [[int main(void) {return 0;}]])],
-	      [gcc_supports_pie=yes], [gcc_supports_pie=no])
+	      [gcc_supports_pie=yes], [gcc_supports_pie=no],
+              [gcc_supports_pie=no])
 AC_MSG_RESULT([$gcc_supports_pie])
 if test $gcc_supports_pie = yes ; then
 	DAEMON_CFLAGS="-fPIE"

[-- Attachment #3: autofs-2.patch --]
[-- Type: text/x-patch, Size: 681 bytes --]

--- autofs-4.1.4-old/configure	2005-04-06 11:24:37.000000000 -0400
+++ autofs-4.1.4/configure	2006-11-07 14:07:37.896113601 -0500
@@ -4219,11 +4219,7 @@
 echo "$as_me:$LINENO: checking whether gcc -fPIE works" >&5
 echo $ECHO_N "checking whether gcc -fPIE works... $ECHO_C" >&6
 if test "$cross_compiling" = yes; then
-  { { echo "$as_me:$LINENO: error: cannot run test program while cross compiling
-See \`config.log' for more details." >&5
-echo "$as_me: error: cannot run test program while cross compiling
-See \`config.log' for more details." >&2;}
-   { (exit 1); exit 1; }; }
+  gcc_supports_pie=no
 else
   cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */

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