From dbb9f38e8d2a6ceb9bfdd3bc4909f1390d77088c Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Wed, 27 Sep 2023 16:06:18 -0400
Subject: [PATCH] xo-cmake: + xo_toplevel_compile_options()

---
 cmake/xo_cxx.cmake | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/cmake/xo_cxx.cmake b/cmake/xo_cxx.cmake
index 160a1833..dac88151 100644
--- a/cmake/xo_cxx.cmake
+++ b/cmake/xo_cxx.cmake
@@ -1,6 +1,32 @@
 
-set(XO_STANDARD_COMPILE_OPTIONS -Werror -Wall -Wextra)
-set(XO_COMPILE_OPTIONS ${XO_STANDARD_COMPILE_OPTIONS})
+macro(xo_toplevel_compile_options)
+    # ----------------------------------------------------------------
+    # variable
+    #   XO_ADDRESS_SANITIZE
+    # determines whether to enable address sanitizer for the XO project
+    # (see toplevel CMakeLists.txt)
+    # ----------------------------------------------------------------
+    if(XO_ADDRESS_SANITIZE)
+        add_compile_options(-fsanitize=address)
+        add_link_options(-fsanitize=address)
+    endif()
+
+    set(XO_STANDARD_COMPILE_OPTIONS -Werror -Wall -Wextra)
+    # XO_ADDRESS_SANITIZE_COMPILE_OPTIONS: use when XO_ADDRESS_SANITIZE=ON
+    #
+    # address sanitizer build complains about _FORTIFY_SOURCE redefines
+    #    In file included from <built-in>:460:
+    #    <command line>:1:9: error: '_FORTIFY_SOURCE' macro redefined [-Werror,-Wmacro-redefined]
+    #    #define _FORTIFY_SOURCE 2
+    #
+    set(XO_ADDRESS_SANITIZE_COMPILE_OPTIONS -Werror -Wall -Wextra -Wno-macro-redefined)
+
+    if(XO_ADDRESS_SANITIZE)
+        set(XO_COMPILE_OPTIONS ${XO_ADDRESS_SANITIZE_COMPILE_OPTIONS})
+    else()
+        set(XO_COMPILE_OPTIONS ${XO_STANDARD_COMPILE_OPTIONS})
+    endif()
+endif()
 
 # ----------------------------------------------------------------
 # use this in subdirs that compile c++ code
@@ -38,6 +64,9 @@ endmacro()
 
 # ----------------------------------------------------------------
 #
+# Require:
+#     needs to be preceded by call to xo_toplevel_compile_options()
+#
 macro(xo_compile_options target)
     target_copmile_options(${target} PRIVATE ${XO_COMPILE_OPTIONS})
 endmacro()