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