From 1fafa273329c2c4be693a85649a51b8f2364e236 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sl=C3=A1vek=20Banko?= <slavek.banko@axis.cz>
Date: Mon, 29 Jun 2015 18:28:40 +0200
Subject: Add gnu tar detection
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Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 9097720c1da8fe553e05e5e7289f8cea4ac76fa2)
---
 ConfigureChecks.cmake | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'ConfigureChecks.cmake')

diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
index 7dad9c85..592f0c57 100644
--- a/ConfigureChecks.cmake
+++ b/ConfigureChecks.cmake
@@ -70,6 +70,29 @@ if( WITH_VCS_SUBVERSION )
 endif( )
 
 
+##### check for gnu tar extensions #############
+if( NOT TAR )
+  message( STATUS "Checking if tar supports GNU extensions" )
+  foreach( TAR_CMD tar gtar gnutar )
+    if( NOT TAR )
+      execute_process(
+        COMMAND ${TAR_CMD} --version
+        OUTPUT_VARIABLE TAR_VERSION
+        ERROR_VARIABLE TAR_VERSION
+      )
+      if( "${TAR_VERSION}" MATCHES "(GNU tar)" )
+        set( TAR "${TAR_CMD}" CACHE INTERNAL "" FORCE )
+      endif( )
+    endif( )
+  endforeach( TAR_CMD )
+  if( TAR )
+    message( STATUS "Checking if tar supports GNU extensions - ${TAR}" )
+  else( )
+    tde_message_fatal( "tar with GNU extensions is required but not found on your system" )
+  endif( )
+endif( )
+
+
 # required stuff
 find_package( TQt )
 find_package( TDE )
-- 
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