From a38e542650f7981a25ce1ac4b093b2025a19ea3c Mon Sep 17 00:00:00 2001
From: scott-eddy <eddy.scott88@gmail.com>
Date: Fri, 9 Mar 2018 12:17:51 -0500
Subject: [PATCH] Build etl based on different profiles.  Works using GNU GCC

---
 CMakeLists.txt | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8af70d19..444f7e2f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,15 @@
 cmake_minimum_required(VERSION 3.5.0)
 project(etl)
 
+#######################################################################
+# Define an option to allow consumers of the library to 
+# specify the profile they would like to compile to.  If
+# not explicitly set CMake will attempt to choose an appropriate
+# profile based on the compiler
+#######################################################################
+set(ETL_PROFILE "DEFAULT" CACHE STRING "Defines what profile header to include.  See https://www.etlcpp.com/setup.html"
+)
+
 add_library(etl
   src/binary.cpp
   src/crc16_ccitt.cpp
@@ -26,8 +35,31 @@ target_include_directories(etl
   src/private
   )
 
+if (${ETL_PROFILE} STREQUAL DEFAULT)
+  if (${CMAKE_CXX_COMPILER_ID} MATCHES "GNU")
+    set(ETL_PROFILE "PROFILE_GCC_GENERIC")
+
+  elseif (${CMAKE_CXX_COMPILER_ID} MATCHES "MSVC")
+    set(ETL_PROFILE "PROFILE_MSVC")
+ 
+  elseif (${CMAKE_CXX_COMPILER_ID} MATCHES "ARMCC")
+    if (${CXX_STANDARD} EQUAL 11)
+      set(ETL_PROFILE "PROFILE_ARMV6")
+    else ()
+      set(ETL_PROFILE "PROFILE_ARMV5")
+    endif()
+  elseif (${CMAKE_CXX_COMPILER_ID} MATCHES "TI")
+    set(ETL_PROFILE "PROFILE_TICC")
+
+  else()
+    message(FATAL_ERROR "Can't generate default profile for compiler: ${CMAKE_CXX_COMPILER_ID}")
+  endif()
+endif() 
+
+message(STATUS "Compiling with ETL profile set to: ${ETL_PROFILE}")
+
 target_compile_definitions(etl
   PUBLIC
-  PROFILE_GCC_GENERIC
+  ${ETL_PROFILE} 
   )