vcpkg/ports/flann/fix-build-error.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f4b94d2..7ff331a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -146,8 +146,7 @@ if (BUILD_CUDA_LIB)
     endif(CUDA_FOUND)
 endif(BUILD_CUDA_LIB)
 
-find_package(PkgConfig REQUIRED)
-pkg_check_modules(LZ4 REQUIRED liblz4)
+find_package(lz4 REQUIRED)
 
 #set the C/C++ include path to the "include" directory
 include_directories(BEFORE ${PROJECT_SOURCE_DIR}/src/cpp)
diff --git a/cmake/Config.cmake.in b/cmake/Config.cmake.in
index 6b95a71..778aec4 100644
--- a/cmake/Config.cmake.in
+++ b/cmake/Config.cmake.in
@@ -3,3 +3,5 @@
 include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
 check_required_components("flann")
 
+include(CMakeFindDependencyMacro)
+find_dependency(lz4)
\ No newline at end of file
diff --git a/cmake/flann_utils.cmake b/cmake/flann_utils.cmake
index afe4742..8aef8e0 100644
--- a/cmake/flann_utils.cmake
+++ b/cmake/flann_utils.cmake
@@ -1,8 +1,7 @@
 macro(GET_OS_INFO)
     string(REGEX MATCH "Linux" OS_IS_LINUX ${CMAKE_SYSTEM_NAME})
-    set(FLANN_LIB_INSTALL_DIR "lib${LIB_SUFFIX}")
-    set(FLANN_INCLUDE_INSTALL_DIR
-        "include/${PROJECT_NAME_LOWER}-${FLANN_MAJOR_VERSION}.${FLANN_MINOR_VERSION}")
+    set(FLANN_LIB_INSTALL_DIR "lib")
+    set(FLANN_INCLUDE_INSTALL_DIR "include")
 endmacro(GET_OS_INFO)
 
 
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 3f4655a..bc1d758 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,9 +1,10 @@
 add_custom_target(examples ALL)
 
+find_package(lz4 REQUIRED)
 
 if (BUILD_C_BINDINGS)
     add_executable(flann_example_c flann_example.c)
-    target_link_libraries(flann_example_c -Wl,--push-state,--no-as-needed ${LZ4_LIBRARIES} -Wl,--pop-state)
+    target_link_libraries(flann_example_c lz4::lz4)
     target_link_libraries(flann_example_c flann)
     set_target_properties(flann_example_c PROPERTIES COMPILE_FLAGS -std=c99)
 
@@ -15,7 +16,7 @@ if (HDF5_FOUND)
     include_directories(${HDF5_INCLUDE_DIR})
 
     add_executable(flann_example_cpp flann_example.cpp)
-    target_link_libraries(flann_example_cpp -Wl,--push-state,--no-as-needed ${LZ4_LIBRARIES} -Wl,--pop-state)
+    target_link_libraries(flann_example_cpp lz4::lz4)
     target_link_libraries(flann_example_cpp ${HDF5_LIBRARIES} flann_cpp)
     if (HDF5_IS_PARALLEL)
         target_link_libraries(flann_example_cpp ${MPI_LIBRARIES})
@@ -27,7 +28,7 @@ if (HDF5_FOUND)
 
     if (USE_MPI AND HDF5_IS_PARALLEL)
         add_executable(flann_example_mpi flann_example_mpi.cpp)
-        target_link_libraries(flann_example_mpi -Wl,--push-state,--no-as-needed ${LZ4_LIBRARIES} -Wl,--pop-state)
+        target_link_libraries(flann_example_mpi lz4::lz4)
         target_link_libraries(flann_example_mpi flann_cpp ${HDF5_LIBRARIES} ${MPI_LIBRARIES} ${Boost_LIBRARIES})
 
         add_dependencies(examples flann_example_mpi)
diff --git a/src/cpp/CMakeLists.txt b/src/cpp/CMakeLists.txt
index b421abb..78f9a64 100644
--- a/src/cpp/CMakeLists.txt
+++ b/src/cpp/CMakeLists.txt
@@ -1,6 +1,6 @@
 #include_directories(${CMAKE_SOURCE_DIR}/include algorithms ext util nn .)
 
-add_definitions(-D_FLANN_VERSION=${FLANN_VERSION})
+add_definitions(-D_FLANN_VERSION=${FLANN_VERSION} -std=c++11)
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/flann/config.h.in ${CMAKE_CURRENT_SOURCE_DIR}/flann/config.h)
 
@@ -8,12 +8,11 @@ file(GLOB_RECURSE C_SOURCES flann.cpp)
 file(GLOB_RECURSE CPP_SOURCES flann_cpp.cpp)
 file(GLOB_RECURSE CU_SOURCES *.cu)
 
-add_library(flann_cpp_s STATIC ${CPP_SOURCES})
-target_link_libraries(flann_cpp_s ${LZ4_LIBRARIES})
-if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG)
-    set_target_properties(flann_cpp_s PROPERTIES COMPILE_FLAGS -fPIC)
-endif()
-set_property(TARGET flann_cpp_s PROPERTY COMPILE_DEFINITIONS FLANN_STATIC FLANN_USE_CUDA)
+find_package(lz4 REQUIRED)
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+add_library(flann_cpp STATIC ${CPP_SOURCES})
+target_link_libraries(flann_cpp PRIVATE lz4::lz4)
+set_property(TARGET flann_cpp PROPERTY COMPILE_DEFINITIONS FLANN_STATIC)
 
 if (BUILD_CUDA_LIB)
     SET(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS};-DFLANN_USE_CUDA")
@@ -25,45 +24,9 @@ if (BUILD_CUDA_LIB)
     else()
 	    set(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS};" )
     endif()
-    cuda_add_library(flann_cuda_s STATIC ${CU_SOURCES})
-    set_property(TARGET flann_cuda_s PROPERTY COMPILE_DEFINITIONS FLANN_STATIC)
-endif()
-
-if(CMAKE_SYSTEM_NAME STREQUAL "Linux" AND CMAKE_COMPILER_IS_GNUCC)
-    add_library(flann_cpp SHARED "")
-    set_target_properties(flann_cpp PROPERTIES LINKER_LANGUAGE CXX)
-    target_link_libraries(flann_cpp -Wl,-whole-archive flann_cpp_s -Wl,-no-whole-archive)
-
-    if (BUILD_CUDA_LIB)
-	    cuda_add_library(flann_cuda SHARED "")
-        set_target_properties(flann_cuda PROPERTIES LINKER_LANGUAGE CXX)
-        target_link_libraries(flann_cuda -Wl,-whole-archive flann_cuda_s -Wl,-no-whole-archive)
-        set_property(TARGET flann_cpp_s PROPERTY COMPILE_DEFINITIONS FLANN_USE_CUDA)
-    # 	target_link_libraries(flann_cuda cudpp_x86_64)
-    endif()
-else()
-    add_library(flann_cpp SHARED ${CPP_SOURCES})
-    target_link_libraries(flann_cpp -Wl,--push-state,--no-as-needed ${LZ4_LIBRARIES} -Wl,--pop-state)
-    # export lz4 headers, so that MSVC to creates flann_cpp.lib
-    set_target_properties(flann_cpp PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS YES)
-    if (BUILD_CUDA_LIB)
-		cuda_add_library(flann_cuda SHARED ${CPP_SOURCES})
-        set_property(TARGET flann_cpp PROPERTY COMPILE_DEFINITIONS FLANN_USE_CUDA)
-    endif()
-endif()
-
-set_target_properties(flann_cpp PROPERTIES
-   VERSION ${FLANN_VERSION}
-   SOVERSION ${FLANN_SOVERSION}
-   DEFINE_SYMBOL FLANN_EXPORTS
-)
-
-if (BUILD_CUDA_LIB)
-    set_target_properties(flann_cuda PROPERTIES
-       VERSION ${FLANN_VERSION}
-       SOVERSION ${FLANN_SOVERSION}
-       DEFINE_SYMBOL FLANN_EXPORTS
-    )
+    cuda_add_library(flann_cuda STATIC ${CU_SOURCES})
+    set_property(TARGET flann_cuda PROPERTY COMPILE_DEFINITIONS FLANN_STATIC)
+    set_property(TARGET flann_cpp PROPERTY COMPILE_DEFINITIONS FLANN_USE_CUDA)
 endif()
 
 
@@ -80,6 +43,7 @@ endif()
 
 
 if (BUILD_C_BINDINGS)
+    if (0)
     add_library(flann_s STATIC ${C_SOURCES})
     target_link_libraries(flann_s -Wl,--push-state,--no-as-needed ${LZ4_LIBRARIES} -Wl,--pop-state)
     if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG)
@@ -105,6 +69,10 @@ if (BUILD_C_BINDINGS)
        SOVERSION ${FLANN_SOVERSION}
        DEFINE_SYMBOL FLANN_EXPORTS
     )
+    endif()
+    add_library(flann STATIC ${C_SOURCES})
+    target_link_libraries(flann PRIVATE lz4::lz4)
+    set_property(TARGET flann PROPERTY COMPILE_DEFINITIONS FLANN_STATIC)
 endif()
 
 if(WIN32)
@@ -118,9 +86,9 @@ endif(WIN32)
 
 
 install (
-    TARGETS flann_cpp flann_cpp_s
+    TARGETS flann_cpp
     EXPORT ${targets_export_name}
-    INCLUDES DESTINATION include
+    INCLUDES DESTINATION ${FLANN_INCLUDE_INSTALL_DIR}
     RUNTIME DESTINATION bin
     LIBRARY DESTINATION ${FLANN_LIB_INSTALL_DIR}
     ARCHIVE DESTINATION ${FLANN_LIB_INSTALL_DIR}
@@ -128,9 +96,9 @@ install (
 
 if (BUILD_CUDA_LIB)
     install (
-        TARGETS flann_cuda flann_cuda_s
+        TARGETS flann_cuda
         EXPORT ${targets_export_name}
-        INCLUDES DESTINATION include
+        INCLUDES DESTINATION ${FLANN_INCLUDE_INSTALL_DIR}
         RUNTIME DESTINATION bin
         LIBRARY DESTINATION ${FLANN_LIB_INSTALL_DIR}
         ARCHIVE DESTINATION ${FLANN_LIB_INSTALL_DIR}
@@ -139,9 +107,9 @@ endif()
 
 if (BUILD_C_BINDINGS)
     install (
-        TARGETS flann flann_s
+        TARGETS flann
         EXPORT ${targets_export_name}
-        INCLUDES DESTINATION include
+        INCLUDES DESTINATION ${FLANN_INCLUDE_INSTALL_DIR}
         RUNTIME DESTINATION bin
         LIBRARY DESTINATION ${FLANN_LIB_INSTALL_DIR}
         ARCHIVE DESTINATION ${FLANN_LIB_INSTALL_DIR}