From 10469239e9c620c3626b75a09e500a5909004e44 Mon Sep 17 00:00:00 2001
From: Ihor Dutchak <ihor.youw@gmail.com>
Date: Mon, 27 Jul 2020 15:10:17 +0300
Subject: [PATCH] handle static lib build exports

---
 libusb/CMakeLists.txt            |  5 +++--
 linux/CMakeLists.txt             |  5 +++--
 mac/CMakeLists.txt               |  2 +-
 src/CMakeLists.txt               | 15 +++++++++++++++
 src/cmake/hidapi-config.cmake.in | 24 ++++++++++++++++++++++++
 5 files changed, 46 insertions(+), 5 deletions(-)

diff --git a/libusb/CMakeLists.txt b/libusb/CMakeLists.txt
index 6cbcebb..c2deb70 100644
--- a/libusb/CMakeLists.txt
+++ b/libusb/CMakeLists.txt
@@ -6,10 +6,11 @@ add_library(hidapi_libusb
 )
 target_link_libraries(hidapi_libusb PUBLIC hidapi_include)
 
-include(FindPkgConfig)
-include(FindThreads)
+find_package(Threads REQUIRED)
 
+include(FindPkgConfig)
 pkg_check_modules(libusb REQUIRED IMPORTED_TARGET libusb-1.0>=1.0.9)
+
 target_link_libraries(hidapi_libusb PRIVATE PkgConfig::libusb Threads::Threads)
 
 set(HIDAPI_LIBNAME "hidapi")
diff --git a/linux/CMakeLists.txt b/linux/CMakeLists.txt
index a2a251a..e547576 100644
--- a/linux/CMakeLists.txt
+++ b/linux/CMakeLists.txt
@@ -6,10 +6,11 @@ add_library(hidapi_hidraw
 )
 target_link_libraries(hidapi_hidraw PUBLIC hidapi_include)
 
-include(FindPkgConfig)
-include(FindThreads)
+find_package(Threads REQUIRED)
 
+include(FindPkgConfig)
 pkg_check_modules(libudev REQUIRED IMPORTED_TARGET libudev)
+
 target_link_libraries(hidapi_hidraw PRIVATE PkgConfig::libudev Threads::Threads)
 
 set_target_properties(hidapi_hidraw
diff --git a/mac/CMakeLists.txt b/mac/CMakeLists.txt
index d032653..9dc0f6c 100644
--- a/mac/CMakeLists.txt
+++ b/mac/CMakeLists.txt
@@ -5,7 +5,7 @@ add_library(hidapi_darwin
     hid.c
 )
 
-include(FindThreads)
+find_package(Threads REQUIRED)
 
 target_link_libraries(hidapi_darwin
     PUBLIC hidapi_include
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 44bf64b..1566ed5 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -66,6 +66,10 @@ endif()
 set(EXPORT_ALIAS)
 set(EXPORT_COMPONENTS)
 
+set(HIDAPI_NEED_EXPORT_THREADS FALSE)
+set(HIDAPI_NEED_EXPORT_LIBUSB FALSE)
+set(HIDAPI_NEED_EXPORT_LIBUDEV FALSE)
+
 if(WIN32)
     add_subdirectory("${PROJECT_ROOT}/windows" windows)
     set(EXPORT_ALIAS winapi)
@@ -74,6 +78,9 @@ elseif(APPLE)
     add_subdirectory("${PROJECT_ROOT}/mac" mac)
     set(EXPORT_ALIAS darwin)
     list(APPEND EXPORT_COMPONENTS darwin)
+    if(NOT BUILD_SHARED_LIBS)
+        set(HIDAPI_NEED_EXPORT_THREADS TRUE)
+    endif()
 else()
     if(NOT DEFINED HIDAPI_WITH_LIBUSB)
         set(HIDAPI_WITH_LIBUSB ON)
@@ -85,6 +92,10 @@ else()
             if(NOT HIDAPI_WITH_LIBUSB)
                 set(EXPORT_ALIAS hidraw)
             endif()
+            if(NOT BUILD_SHARED_LIBS)
+                set(HIDAPI_NEED_EXPORT_THREADS TRUE)
+                set(HIDAPI_NEED_EXPORT_LIBUDEV TRUE)
+            endif()
         endif()
         set(HIDAPI_LIBNAME_VERBOSE ON)
     else()
@@ -95,6 +106,10 @@ else()
         add_subdirectory("${PROJECT_ROOT}/libusb" libusb)
         list(APPEND EXPORT_COMPONENTS libusb)
         set(EXPORT_ALIAS libusb)
+        if(NOT BUILD_SHARED_LIBS)
+            set(HIDAPI_NEED_EXPORT_THREADS TRUE)
+            set(HIDAPI_NEED_EXPORT_LIBUSB TRUE)
+        endif()
     elseif(NOT TARGET hidapi_hidraw)
         message(FATAL_ERROR "Select at least one option to build: HIDAPI_WITH_LIBUSB or HIDAPI_WITH_HIDRAW")
     endif()
diff --git a/src/cmake/hidapi-config.cmake.in b/src/cmake/hidapi-config.cmake.in
index fab14cc..91ba3ba 100644
--- a/src/cmake/hidapi-config.cmake.in
+++ b/src/cmake/hidapi-config.cmake.in
@@ -8,6 +8,30 @@ set(hidapi_VERSION_STR "@hidapi_VERSION@@VERSION_SUFFIX@")
 
 set(hidapi_FOUND FALSE)
 
+set(HIDAPI_NEED_EXPORT_THREADS @HIDAPI_NEED_EXPORT_THREADS@)
+set(HIDAPI_NEED_EXPORT_LIBUSB @HIDAPI_NEED_EXPORT_LIBUSB@)
+set(HIDAPI_NEED_EXPORT_LIBUDEV @HIDAPI_NEED_EXPORT_LIBUDEV@)
+
+if(HIDAPI_NEED_EXPORT_THREADS)
+  if(CMAKE_VERSION VERSION_LESS 3.4.3)
+    message(FATAL_ERROR "This file relies on consumers using CMake 3.4.3 or greater.")
+  endif()
+  find_package(Threads REQUIRED)
+endif()
+
+if(HIDAPI_NEED_EXPORT_LIBUSB OR HIDAPI_NEED_EXPORT_LIBUDEV)
+  if(CMAKE_VERSION VERSION_LESS 3.6.3)
+    message(FATAL_ERROR "This file relies on consumers using CMake 3.6.3 or greater.")
+  endif()
+  include(FindPkgConfig)
+  if(HIDAPI_NEED_EXPORT_LIBUSB)
+    pkg_check_modules(libusb REQUIRED IMPORTED_TARGET libusb-1.0>=1.0.9)
+  endif()
+  if(HIDAPI_NEED_EXPORT_LIBUDEV)
+    pkg_check_modules(libudev REQUIRED IMPORTED_TARGET libudev)
+  endif()
+endif()
+
 include("${CMAKE_CURRENT_LIST_DIR}/hidapi.cmake")
 
 set(hidapi_FOUND TRUE)