Clean 7zip deps: cmake always provide tar, right?

README.md

@@ -12,8 +12,7 @@ The goal is using one single CMake code to build against *SuiteSparse* in standa
   * (1) Install [CMake](http://www.cmake.org/).
   * (2) Only for Linux/Mac: Install LAPACK & BLAS. In Debian/Ubuntu: `sudo apt-get install liblapack-dev libblas-dev`
   * (3) Clone or download this project ([latest release](https://github.com/jlblancoc/suitesparse-metis-for-windows/releases)) and extract it somewhere in your disk, say `SP_ROOT`.
-      * In Windows, install [7-Zip](http://www.7-zip.org/) if you want CMake to download SuiteSparse sources automatically for you. 
-	  * (OPTIONAL) Otherwise, manually install SuiteSparse as follows: 
+	  * (OPTIONAL) CMake will download SuiteSparse sources automatically for you (skip to step 4), but you may do it manually if preferred: 
         * Populate the directories within `SP_ROOT` with the original sources from each project:
           * *`SuiteSparse`:* 
             * Download [SuiteSparse-X.Y.Z.tar.gz](http://www.cise.ufl.edu/research/sparse/SuiteSparse/) from Tim Davis' webpage. 

checkGetSuiteSparse.cmake

@@ -12,47 +12,21 @@
 ## Created by jesnault (jerome.esnault@inria.fr) 2014-01-21
 ## Updated by jesnault (jerome.esnault@inria.fr) 2014-01-21
 
-if(POLICY CMP0053)
-	cmake_policy(SET CMP0053 OLD) # To correctly interpret the 7-zip strings below
-endif()
-
-## try first with 7-Zip, and with standard cmake tar command otherwise
+## use standard cmake tar command
 macro(SuiteSparse_unzip whichZipFile)
-	find_program(7ZIP_CMD NAMES 7z DOC "7-zip executable" 
-		PATHS 	"$ENV{PROGRAMFILES}/7-Zip"	"$ENV{PROGRAMFILES(x86)}/7-Zip"
-				/usr/bin	/usr/local/bin
-	)
-	if(OFF)
-		message(STATUS "unzip: please, wait until ${7ZIP_CMD} finished...")
-		execute_process( 	COMMAND ${7ZIP_CMD} x ${whichZipFile} -y
-							WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}	TIMEOUT 120
-							RESULT_VARIABLE resVar OUTPUT_VARIABLE outVar ERROR_VARIABLE errVar
-						)
-		if(${resVar} MATCHES "0")
-			message(STATUS "SuiteSparse just unziped in the source dir") ## OK
-			set(SUITESPARSE_DL_LAST OFF CACHE BOOL "get the last version of suiteSparse" FORCE)
-		else()
-			message(WARNING "something wrong with ${7ZIP_CMD} command, redo or try to unzip by yourself...")
-			message("unzip: outVar=${outVar}")
-			message("unzip: errVar=${errVar}")
-		endif()
+	get_filename_component(zipFile ${whichZipFile} NAME)
+	message(STATUS "unzip: please, wait until tar xzf ${whichZipFile} finished...")
+	execute_process( 	COMMAND ${CMAKE_COMMAND} -E tar xzf ${zipFile}
+						WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}	TIMEOUT 120
+						RESULT_VARIABLE resVar OUTPUT_VARIABLE outVar ERROR_VARIABLE errVar
+					)
+	if(${resVar} MATCHES "0")
+		message(STATUS "SuiteSparse just unziped in the source dir") ## OK
+		set(SUITESPARSE_DL_LAST OFF CACHE BOOL "get the last version of suiteSparse" FORCE)
 	else()
-		get_filename_component(zipFile ${whichZipFile} NAME)
-		message(STATUS "unzip: please, wait until tar xzf ${whichZipFile} finished...")
-		execute_process( 	COMMAND ${CMAKE_COMMAND} -E tar xzf ${zipFile}
-							WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}	TIMEOUT 120
-							RESULT_VARIABLE resVar OUTPUT_VARIABLE outVar ERROR_VARIABLE errVar
-						)
-		if(${resVar} MATCHES "0")
-			message(STATUS "SuiteSparse just unziped in the source dir") ## OK
-			set(SUITESPARSE_DL_LAST OFF CACHE BOOL "get the last version of suiteSparse" FORCE)
-		else()
-			message(WARNING "something wrong with cmake tar command, redo or try to unzip by yourself...")
-			message("unzip: outVar=${outVar}")
-			message("unzip: errVar=${errVar}")
-			message("Or try to get 7zip (http://www.7-zip.org/download.html) to unzip the downloaded dir.")
-			set(7ZIP_CMD "" CACHE FILEPATH "7-zip executable")
-		endif()
+		message(WARNING "something wrong with cmake tar command, redo or try to unzip by yourself...")
+		message("unzip: outVar=${outVar}")
+		message("unzip: errVar=${errVar}")
 	endif()
 endmacro()
 
@@ -84,6 +58,5 @@ if(SUITESPARSE_DL_LAST)
 	endif()
 	if(EXISTS "${SUITESPARSE_ZIP}")
 		execute_process(COMMAND "${CMAKE_COMMAND}" -E remove "${SUITESPARSE_ZIP}")
-	endif()
-
+	endif()	
 endif()