From 491ff01c7996b037a2bc250d13352db1ff932130 Mon Sep 17 00:00:00 2001
From: Bruno Herbelin <bruno.herbelin@gmail.com>
Date: Mon, 14 Mar 2022 22:52:50 +0100
Subject: [PATCH] Optional library dependency CMake

---
 CMakeLists.txt |  7 ++++---
 README.md      | 15 +++++++++++++--
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 15a3f1d..1e41be6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -147,6 +147,7 @@ endif()
 if (GLM_FOUND)
     macro_log_feature(GLM_FOUND "GLM" "OpenGL mathematics" "https://glm.g-truc.net" TRUE)
 else ()
+    set(GLM_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/ext/glm)
     add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/ext/glm)
     message(STATUS "Compiling 'GLM' OpenGL mathematics https://glm.g-truc.net -- ${CMAKE_CURRENT_SOURCE_DIR}/ext/glm")
 endif()
@@ -163,9 +164,9 @@ endif()
 if (TINYXML2_FOUND)
     macro_log_feature(TINYXML2_FOUND "TinyXML2" "TinyXML2 library" "https://github.com/leethomason/tinyxml2.git" TRUE)
 else ()
-    add_library(tinyxml2 "${CMAKE_CURRENT_SOURCE_DIR}/ext/tinyxml2/tinyxml2.cpp")
     set(TINYXML2_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/ext/tinyxml2)
-    set(TINYXML2_LIBRARIES -ltinyxml2)
+    set(TINYXML2_LIBRARIES TINYXML2)
+    add_library(TINYXML2 "${CMAKE_CURRENT_SOURCE_DIR}/ext/tinyxml2/tinyxml2.cpp")
     message(STATUS "Compiling 'TinyXML2' from https://github.com/leethomason/tinyxml2.git -- ${TINYXML2_INCLUDE_DIRS}")
 endif()
 
@@ -194,7 +195,7 @@ if (AbletonLink_FOUND)
     macro_log_feature(AbletonLink_FOUND "AbletonLink" "Ableton Link synchronizer" "https://github.com/Ableton/link" TRUE)
 else ()
     include(${CMAKE_CURRENT_SOURCE_DIR}/ext/link/AbletonLinkConfig.cmake)
-    message(STATUS "Compiling with Ableton Link https://github.com/Ableton/link -- ${CMAKE_CURRENT_SOURCE_DIR}/ext/link")
+    message(STATUS "Compiling 'Ableton Link' from https://github.com/Ableton/link -- ${CMAKE_CURRENT_SOURCE_DIR}/ext/link")
 endif()
 
 #
diff --git a/README.md b/README.md
index 4fc1c03..b37a9bc 100644
--- a/README.md
+++ b/README.md
@@ -69,9 +69,16 @@ Compile (or re-compile after pull):
 **Libraries:**
 
 - gstreamer
-- gst-plugins : libav, base, good, bad & ugly
+- gst-plugins (libav, base, good, bad & ugly)
 - libglfw3
-- libicu
+- libicu (icu-i18n icu-uc icu-io)
+
+Optionnal:
+
+- glm
+- stb
+- TinyXML2
+- AbletonLink
 
 #### Install Dependencies
 
@@ -79,6 +86,10 @@ Compile (or re-compile after pull):
 
     $ apt-get install build-essential cmake libpng-dev libglfw3-dev libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev gstreamer1.0-libav libicu-dev libgtk-3-dev 
 
+Optionnal:
+
+    $ apt-get install libglm-dev libstb-dev libtinyxml2-dev ableton-link-dev 
+
 **OSX with Brew**
 
     $ brew install cmake libpng glfw gstreamer gst-libav gst-plugins-bad gst-plugins-base gst-plugins-good gst-plugins-ugly icu4c