From bc03c01e57dff20fd7a79697af6a3f00577d64ae Mon Sep 17 00:00:00 2001
From: SpaceIm <30052553+SpaceIm@users.noreply.github.com>
Date: Tue, 13 Apr 2021 01:00:07 +0200
Subject: [PATCH] add option to build documentation (#179)

---
 CMakeLists.txt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4c80fa5..8f8b111 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,8 +5,10 @@ project(zip
   VERSION "0.1.19")
 set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake" ${CMAKE_MODULE_PATH})
 set(CMAKE_VERBOSE_MAKEFILE ON)
+
 option(CMAKE_DISABLE_TESTING "Disable test creation" OFF)
 option(ZIP_STATIC_PIC "Build static zip with PIC" ON)
+option(ZIP_BUILD_DOCS "Generate API documentation with Doxygen" OFF)
 
 # zip
 set(SRC src/miniz.h src/zip.h src/zip.c)
@@ -111,8 +113,8 @@ if(NOT TARGET uninstall)
         COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake/cmake_uninstall.cmake)
 endif()
 
-find_package(Doxygen)
-if(DOXYGEN_FOUND)
+if(ZIP_BUILD_DOCS)
+    find_package(Doxygen REQUIRED)
     configure_file(${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
     add_custom_target(doc
         ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile