[x265] [PATCH] cmake: Don't rely on non-POSIX ar functionality

[Derek Buitenhuis]

# HG changeset patch
# User Derek Buitenhuis <derek.buitenhuis at gmail.com>
# Date 1379086931 -3600
# Node ID bccb0daae14930f5fe2af80ae04be73ccbaa3f6e
# Parent  45786d093571fd0456574a0edf6230bb5a33d343
cmake: Don't rely on non-POSIX ar functionality

Fixes build on stricter systems like FreeBSD.

diff -r 45786d093571 -r bccb0daae149 source/cmake/mergestaticlibs.cmake
--- a/source/cmake/mergestaticlibs.cmake	Fri Sep 13 15:41:03 2013 +0530
+++ b/source/cmake/mergestaticlibs.cmake	Fri Sep 13 16:42:11 2013 +0100
@@ -109,11 +109,9 @@
 				DEPENDS ${lib})
 		endif()
 		list(APPEND extrafiles "${objlistfile}")
-		# relative path is needed by ar under MSYS
-		file(RELATIVE_PATH objlistfilerpath ${objdir} ${objlistfile})
 		add_custom_command(TARGET ${outlib} POST_BUILD
-			COMMAND ${CMAKE_COMMAND} -E echo "Running: ${CMAKE_AR} ru ${outfile} @${objlistfilerpath}"
-			COMMAND ${CMAKE_AR} ru "${outfile}" @"${objlistfilerpath}"
+			COMMAND ${CMAKE_COMMAND} -E echo "Running: ${CMAKE_AR} ru ${outfile} @${objlistfile}"
+			COMMAND ${CMAKE_AR} ru "${outfile}" $$\(cat "${objlistfile}"\)
 			WORKING_DIRECTORY ${objdir})		
 	endforeach()
 	add_custom_command(TARGET ${outlib} POST_BUILD