Replace the deprecated exec_program call with execute_process

Signed-off-by: Addisu Z. Taddese <addisu@openrobotics.org>

CMakeLists.txt

@@ -74,7 +74,7 @@ if(UNIX AND NOT WIN32)
   set (CMAKE_INSTALL_PREFIX "/usr" CACHE STRING "Install Prefix")
  find_program(CMAKE_UNAME uname /bin /usr/bin /usr/local/bin )
  if(CMAKE_UNAME)
-   exec_program(uname ARGS -m OUTPUT_VARIABLE CMAKE_SYSTEM_PROCESSOR)
+   execute_process(COMMAND uname -m OUTPUT_VARIABLE CMAKE_SYSTEM_PROCESSOR)
    set(CMAKE_SYSTEM_PROCESSOR ${CMAKE_SYSTEM_PROCESSOR} CACHE INTERNAL
      "processor type (i386 and x86_64)")
    if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")

cmake/cmake_uninstall.cmake.in

@@ -1,21 +1,21 @@
 if(NOT EXISTS "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt")
-  message(FATAL_ERROR "Cannot find install manifest: "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt"")
+  message(FATAL_ERROR "Cannot find install manifest: '@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt'")
 endif(NOT EXISTS "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt")
 
 file(READ "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt" files)
 string(REGEX REPLACE "\n" ";" files "${files}")
 foreach(file ${files})
-  message(STATUS "Uninstalling "$ENV{DESTDIR}${file}"")
+  message(STATUS "Uninstalling '$ENV{DESTDIR}${file}'")
   if(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
-    exec_program(
-      "@CMAKE_COMMAND@" ARGS "-E remove "$ENV{DESTDIR}${file}""
+    execute_process(COMMAND
+      @CMAKE_COMMAND@ -E remove $ENV{DESTDIR}${file}
       OUTPUT_VARIABLE rm_out
-      RETURN_VALUE rm_retval
+      RESULT_VARIABLE rm_retval
       )
-    if(NOT "${rm_retval}" STREQUAL 0)
-      message(FATAL_ERROR "Problem when removing "$ENV{DESTDIR}${file}"")
-    endif(NOT "${rm_retval}" STREQUAL 0)
+    if(rm_retfal AND NOT rm_retval STREQUAL 0)
+      message(FATAL_ERROR "Problem when removing '$ENV{DESTDIR}${file}'")
+    endif()
   else(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
-    message(STATUS "File "$ENV{DESTDIR}${file}" does not exist.")
-  endif(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
+    message(STATUS "File '$ENV{DESTDIR}${file}' does not exist.")
+  endif()
 endforeach(file)