| From bb5cc9cee1963362fe56b4fac65fed4912da4215 Mon Sep 17 00:00:00 2001 |
| From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> |
| Date: Sat, 30 Jul 2016 22:30:01 +0200 |
| Subject: [PATCH] configure: add cache variable for Linux proc filesystem check |
| |
| When cross-compiling, whether the /proc filesystem is available in the |
| build environment does not give any indication as to whether it will |
| be available in the execution environment. |
| |
| This commit therefore adjust the AF_LINUX_PROCFS macro to use |
| AC_CACHE_CHECK(), so that an ac_cv_linux_procfs variable can be |
| preseeded in the environment to force the result of this check. |
| |
| Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> |
| --- |
| aclocal.m4 | 15 +++++---------- |
| 1 file changed, 5 insertions(+), 10 deletions(-) |
| |
| diff --git a/aclocal.m4 b/aclocal.m4 |
| index 2115204..333699c 100644 |
| --- a/aclocal.m4 |
| +++ b/aclocal.m4 |
| @@ -80,16 +80,11 @@ dnl |
| dnl Check for the Linux /proc filesystem |
| dnl -------------------------------------------------------------------------- |
| AC_DEFUN(AF_LINUX_PROCFS, |
| -[AC_MSG_CHECKING(for Linux proc filesystem) |
| -if test "x`cat /proc/sys/kernel/ostype 2>&-`" = "xLinux" |
| -then |
| - linux_procfs=yes |
| -else |
| - linux_procfs=no |
| -fi |
| -AC_MSG_RESULT($linux_procfs) |
| -if test $linux_procfs = yes |
| -then |
| +[AC_CACHE_CHECK([for Linux proc filesystem], [ac_cv_linux_procfs], |
| + [ac_cv_linux_procfs=no |
| + test "x`cat /proc/sys/kernel/ostype 2>&-`" = "xLinux" && ac_cv_linux_procfs=yes]) |
| + if test $ac_cv_linux_procfs = yes |
| + then |
| AC_DEFINE(HAVE_LINUX_PROCFS, 1, |
| [Define if you have the Linux /proc filesystem.]) |
| fi]) |
| -- |
| 2.7.4 |
| |
