From 206d349d5ba002845d7604499c873ead6127fce9 Mon Sep 17 00:00:00 2001
From: Richard Berger <richard.berger@temple.edu>
Date: Thu, 28 Jun 2018 14:16:56 -0400
Subject: [PATCH] Simplify DetectBuildSystemConflict CMake utility

---
 cmake/Modules/StyleHeaderUtils.cmake | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/cmake/Modules/StyleHeaderUtils.cmake b/cmake/Modules/StyleHeaderUtils.cmake
index 2def9ebc88..ea3bea3b51 100644
--- a/cmake/Modules/StyleHeaderUtils.cmake
+++ b/cmake/Modules/StyleHeaderUtils.cmake
@@ -154,13 +154,9 @@ function(GenerateStyleHeaders output_path)
 endfunction(GenerateStyleHeaders)
 
 function(DetectBuildSystemConflict lammps_src_dir)
-  math(EXPR N "${ARGC}-1")
-
-  if(N GREATER 0)
-    math(EXPR ARG_END   "${ARGC}-1")
-
-    foreach(IDX RANGE 1 ${ARG_END})
-        list(GET ARGV ${IDX} SRC_FILE)
+  if(ARGC GREATER 1)
+    list(REMOVE_AT ARGV 0)
+    foreach(SRC_FILE ${ARGV})
         get_filename_component(FILENAME ${SRC_FILE} NAME)
         if(EXISTS ${lammps_src_dir}/${FILENAME})
             message(FATAL_ERROR "\n########################################################################\n"