From 32fbf704305a940cc8a922476f712f824208ad0f Mon Sep 17 00:00:00 2001
From: Matteo Paonessa <matteo.paonessa@gmail.com>
Date: Wed, 22 Jan 2020 20:26:17 +0100
Subject: [PATCH] Variables in CMake build script

---
 CMakeLists.txt         | 39 ++++++++++++++++++++++++---------------
 caesium/CMakeLists.txt | 12 +++---------
 2 files changed, 27 insertions(+), 24 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e0717a6..7c0cce3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,25 +24,34 @@ configure_file(
 include_directories("${PROJECT_BINARY_DIR}")
 
 if (APPLE)
-    link_directories(/opt/mozjpeg/lib)
-
-    include_directories(/opt/mozjpeg/include)
-    include_directories(/usr/local/include)
+    set(MOZJPEG_DEFAULT_PATH /opt/mozjpeg)
+    set(ZOPFLI_DEFAULT_PATH /usr/local)
 elseif (WIN32)
-    include_directories(C:\\mozjpeg\\include)
-    include_directories(C:\\zopfli\\src)
+    set(MOZJPEG_DEFAULT_PATH C:\\mozjpeg)
+    set(ZOPFLI_DEFAULT_PATH C:\\zopfli)
 else ()
-    include_directories(/opt/mozjpeg/include)
-    include_directories(/usr/include/zopflipng)
-
-    if (EXISTS /opt/mozjpeg/lib64)
-        link_directories(/opt/mozjpeg/lib64)
-    else ()
-        link_directories(/opt/mozjpeg/lib)
-    endif ()
+    set(MOZJPEG_DEFAULT_PATH /opt/mozjpeg)
+    set(ZOPFLI_DEFAULT_PATH /usr)
 endif ()
 
-link_directories(/usr/local/lib)
+
+if (NOT DEFINED MOZJPEG_PATH)
+    set(MOZJPEG_PATH ${MOZJPEG_DEFAULT_PATH})
+endif()
+
+if (NOT DEFINED ZOPFLI_PATH)
+    set(ZOPFLI_PATH ${ZOPFLI_DEFAULT_PATH})
+endif()
+
+include_directories(${MOZJPEG_PATH}/include)
+include_directories(${ZOPFLI_PATH}/include)
+
+if (EXISTS ${MOZJPEG_PATH}/lib64)
+    link_directories(${MOZJPEG_PATH}/lib64)
+else ()
+    link_directories(${MOZJPEG_PATH}/lib)
+endif ()
+link_directories(${ZOPFLI_PATH}/lib)
 
 add_subdirectory(caesium)
 add_subdirectory(demo)
diff --git a/caesium/CMakeLists.txt b/caesium/CMakeLists.txt
index 8f142ff..eb13752 100644
--- a/caesium/CMakeLists.txt
+++ b/caesium/CMakeLists.txt
@@ -4,15 +4,9 @@ else ()
     set(CMAKE_C_FLAGS "--std=gnu99 ${CMAKE_C_FLAGS}")
 endif ()
 
-if (APPLE)
-    find_library(zopflipng zopflipng /usr/local/lib)
-    find_library(jpeg jpeg /usr/local/opt/mozjpeg/lib)
-    find_library(turbojpeg turbojpeg /usr/local/opt/mozjpeg/lib)
-ELSE ()
-    find_library(zopflipng zopflipng /usr/lib)
-    find_library(jpeg jpeg /opt/mozjpeg/lib)
-    find_library(turbojpeg turbojpeg /opt/mozjpeg/lib)
-ENDIF ()
+find_library(jpeg jpeg ${MOZJPEG_PATH}/lib)
+find_library(turbojpeg turbojpeg ${MOZJPEG_PATH}/lib)
+find_library(zopflipng zopflipng ${ZOPFLI_PATH}/lib)
 
 add_library(caesium SHARED caesium.c error.c utils.c png.c vendor/lodepng.c jpeg.c)
 add_library(caesium_static STATIC caesium.c error.c utils.c png.c vendor/lodepng.c jpeg.c)