CMakeLists.txt: Replace IS_EXECUTABLE with EXISTS

IS_EXECUTABLE does not exist in older versions of cmake.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9886214d758e8ef3e4abacf2aa862428b58a70ac..4beecc3caf46ccc6b15f4534d785a1cca5b35f54 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -68,7 +68,7 @@ set_source_files_properties(src/archiver.c
         COMPILE_FLAGS -Wno-format-nonliteral
 )
 
-if(IS_EXECUTABLE /usr/bin/git)
+if(EXISTS /usr/bin/git)
     execute_process(COMMAND /usr/bin/git describe --long --tags
         WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
         OUTPUT_VARIABLE SIMPLE_ARCHIVER_GIT_VER