package/flann: bump to version 1.9.2

- lz4 is a mandatory dependency since
  https://github.com/flann-lib/flann/commit/df3fc59212660e43867cb85d5e557f5cae6d30d7
- Drop patch (not needed since
  https://github.com/flann-lib/flann/commit/86c92adbdea3e41d7ad371732cfe3b8231e0ecc6)
- PYTHON_EXECUTABLE can be dropped since
  https://github.com/flann-lib/flann/commit/5f4ac506323585c1f74ef57a73962beb887e3a3b

https://github.com/flann-lib/flann/blob/1.9.2/ChangeLog

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/flann/0001-src-cpp-fix-cmake-3.11-build.patch

@@ -1,80 +0,0 @@
-From fa5ec96a94646492a3f908e12905b3e48a8e800b Mon Sep 17 00:00:00 2001
-From: Romain Naour <romain.naour@gmail.com>
-Date: Wed, 18 Apr 2018 20:24:13 +0200
-Subject: [PATCH] src/cpp: fix cmake >= 3.11 build
-
-CMake < 3.11 doesn't support add_library() without any source file
-(i.e add_library(foo SHARED)). But flann CMake use a trick that use
-an empty string "" as source list (i.e add_library(foo SHARED "")).
-This look like a bug in CMake < 3.11.
-
-With CMake >= 3.11, the new behaviour of add_library() break the
-existing flann CMake code.
-
-From CMake Changelog [1]:
-"add_library() and add_executable() commands can now be called without
- any sources and will not complain as long as sources are added later
- via the target_sources() command."
-
-Note: flann CMake code doesn't use target_sources() since no source file
-are provided intentionally since the flann shared library is created by
-linking with the flann_cpp_s static library with this line:
-
-target_link_libraries(flann_cpp -Wl,-whole-archive flann_cpp_s -Wl,-no-whole-archive)
-
-If you try to use "add_library(flann_cpp SHARED ${CPP_SOURCES})" (as it should
-be normally done), the link fail due to already defined symbol.
-
-They are building the shared version using the static library "to speedup the
-build time" [3]
-
-This issue is already reported upstream [2] with a proposed solution.
-
-Upstream status: Pending
-
-Fixes:
-http://autobuild.buildroot.net/results/b2f/b2febfaf8c44ce477b3e4a5b9b976fd25e8d7454
-
-[1] https://cmake.org/cmake/help/v3.11/release/3.11.html
-[2] https://github.com/mariusmuja/flann/issues/369
-[3] https://github.com/mariusmuja/flann/commit/0fd62b43be2fbb0b8d791ee36290791224dc030c
-
-Signed-off-by: Romain Naour <romain.naour@gmail.com>
----
- src/cpp/CMakeLists.txt | 4 ++--
- src/cpp/empty.cpp      | 1 +
- 2 files changed, 3 insertions(+), 2 deletions(-)
- create mode 100644 src/cpp/empty.cpp
-
-diff --git a/src/cpp/CMakeLists.txt b/src/cpp/CMakeLists.txt
-index b44a735..a816863 100644
---- a/src/cpp/CMakeLists.txt
-+++ b/src/cpp/CMakeLists.txt
-@@ -29,7 +29,7 @@ if (BUILD_CUDA_LIB)
- endif()
- 
- if(CMAKE_SYSTEM_NAME STREQUAL "Linux" AND CMAKE_COMPILER_IS_GNUCC)
--    add_library(flann_cpp SHARED "")
-+    add_library(flann_cpp SHARED "empty.cpp")
-     set_target_properties(flann_cpp PROPERTIES LINKER_LANGUAGE CXX)
-     target_link_libraries(flann_cpp -Wl,-whole-archive flann_cpp_s -Wl,-no-whole-archive)
- 
-@@ -85,7 +85,7 @@ if (BUILD_C_BINDINGS)
-     set_property(TARGET flann_s PROPERTY COMPILE_DEFINITIONS FLANN_STATIC)
- 
-     if(CMAKE_SYSTEM_NAME STREQUAL "Linux" AND CMAKE_COMPILER_IS_GNUCC)
--        add_library(flann SHARED "")
-+        add_library(flann SHARED "empty.cpp")
-         set_target_properties(flann PROPERTIES LINKER_LANGUAGE CXX)
-         target_link_libraries(flann -Wl,-whole-archive flann_s -Wl,-no-whole-archive)
-     else()
-diff --git a/src/cpp/empty.cpp b/src/cpp/empty.cpp
-new file mode 100644
-index 0000000..40a8c17
---- /dev/null
-+++ b/src/cpp/empty.cpp
-@@ -0,0 +1 @@
-+/* empty */
--- 
-2.14.3
-

package/flann/Config.in

@@ -2,6 +2,7 @@ config BR2_PACKAGE_FLANN
 	bool "flann"
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on !BR2_STATIC_LIBS
+	select BR2_PACKAGE_LZ4
 	help
 	  FLANN is a library for performing fast approximate nearest
 	  neighbor searches in high dimensional spaces. It contains a

package/flann/flann.hash

@@ -1,3 +1,3 @@
 # Locally calculated
-sha256  b23b5f4e71139faa3bcb39e6bbcc76967fbaf308c4ee9d4f5bfbeceaa76cc5d3  flann-1.9.1.tar.gz
+sha256  e26829bb0017f317d9cc45ab83ddcb8b16d75ada1ae07157006c1e7d601c8824  flann-1.9.2.tar.gz
 sha256  3993f339cc56506c62aa1eb2fb76f240ee93b738d857832899c1e207b1dc069a  COPYING

package/flann/flann.mk

@@ -4,18 +4,18 @@
 #
 ################################################################################
 
-FLANN_VERSION = 1.9.1
+FLANN_VERSION = 1.9.2
 FLANN_SITE = $(call github,mariusmuja,flann,$(FLANN_VERSION))
 FLANN_INSTALL_STAGING = YES
 FLANN_LICENSE = BSD-3-Clause
 FLANN_LICENSE_FILES = COPYING
+FLANN_DEPENDENCIES = host-pkgconf lz4
 FLANN_CONF_OPTS = \
 	-DBUILD_C_BINDINGS=ON \
 	-DBUILD_PYTHON_BINDINGS=OFF \
 	-DBUILD_MATLAB_BINDINGS=OFF \
 	-DBUILD_EXAMPLES=$(if $(BR2_PACKAGE_FLANN_EXAMPLES),ON,OFF) \
 	-DUSE_OPENMP=$(if $(BR2_TOOLCHAIN_HAS_OPENMP),ON,OFF) \
-	-DPYTHON_EXECUTABLE=OFF \
 	-DCMAKE_DISABLE_FIND_PACKAGE_HDF5=TRUE
 
 FLANN_CXXFLAGS = $(TARGET_CXXFLAGS)