From dc57685ac3d28349fbb64472f0e34c8fd7e2eeb4 Mon Sep 17 00:00:00 2001
From: Christophe Bedard <bedard.christophe@gmail.com>
Date: Sat, 29 Feb 2020 11:53:33 -0500
Subject: [PATCH] Make sure USE_SANITIZER is not empty before foreach

Signed-off-by: Christophe Bedard <bedard.christophe@gmail.com>
---
 CMakeLists.txt | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2811e3a..fd7878f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -173,19 +173,21 @@ endif()
 
 # Make it easy to enable Clang's/gcc's analyzers
 set(USE_SANITIZER "" CACHE STRING "Sanitizers to enable on the build.")
-foreach(san "${USE_SANITIZER}")
-  message(STATUS "Enabling sanitizer: '${san}'")
+if(NOT("${USE_SANITIZER}" STREQUAL ""))
+  foreach(san "${USE_SANITIZER}")
+    message(STATUS "Enabling sanitizer: '${san}'")
 
-  if("${san}" STREQUAL address)
-    add_compile_options(-fno-omit-frame-pointer)
-    link_libraries(-fno-omit-frame-pointer)
-  endif()
+    if("${san}" STREQUAL address)
+      add_compile_options(-fno-omit-frame-pointer)
+      link_libraries(-fno-omit-frame-pointer)
+    endif()
 
-  if(NOT("${san}" STREQUAL "none"))
-    add_compile_options("-fsanitize=${san}")
-    link_libraries("-fsanitize=${san}")
-  endif()
-endforeach()
+    if(NOT("${san}" STREQUAL "none"))
+      add_compile_options("-fsanitize=${san}")
+      link_libraries("-fsanitize=${san}")
+    endif()
+  endforeach()
+endif()
 
 
 include(GNUInstallDirs)