[PATCH v2] configure.in: fail abstract socket test gracefully when cross-compiling

[Marc Mutz]

 * configure.in: only run AC_CACHE_CHECK if enable_abstract_sockets=auto
 * configure.in: warn that, when cross-compiling, we're unable to detect
                 abstract sockets availability automatically
---
 configure.in |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/configure.in b/configure.in
index 0705ae2..d666dd1 100644
--- a/configure.in
+++ b/configure.in
@@ -814,8 +814,9 @@ AC_CHECK_FUNCS(getpeerucred getpeereid)
 
 #### Abstract sockets
 
-if ! test x$enable_abstract_sockets = xno; then
+if test x$enable_abstract_sockets = xauto; then
 AC_LANG_PUSH(C)
+warn_on_xcompile=no
 AC_CACHE_CHECK([abstract socket namespace],
                ac_cv_have_abstract_sockets,
                [AC_RUN_IFELSE([AC_LANG_PROGRAM(
@@ -855,8 +856,15 @@ AC_CACHE_CHECK([abstract socket namespace],
     exit (0);
 ]])],
               [ac_cv_have_abstract_sockets=yes],
-              [ac_cv_have_abstract_sockets=no]
+              [ac_cv_have_abstract_sockets=no],
+              [
+                ac_cv_have_abstract_sockets=no
+                warn_on_xcompile=yes
+              ]
 )])
+if test x$warn_on_xcompile = xyes ; then
+  AC_MSG_WARN([Cannot check for abstract sockets when cross-compiling, please 
use --enable-abstract-sockets])
+fi
 AC_LANG_POP(C)
 fi
 
-- 
1.5.6.5


-- 
Marc Mutz <marc at kdab.com> | Senior Software Engineer
KDAB (Deutschland) GmbH & Co.KG, a KDAB Group Company
www.kdab.com || Germany +49-30-521325470 || Sweden (HQ) +46-563-540090
KDAB - Qt Experts - Platform-Independent Software Solutions