diff options
Diffstat (limited to 'gnu/packages/patches/flann-cmake-3.11.patch')
| -rw-r--r-- | gnu/packages/patches/flann-cmake-3.11.patch | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/gnu/packages/patches/flann-cmake-3.11.patch b/gnu/packages/patches/flann-cmake-3.11.patch new file mode 100644 index 0000000000..1fb76eca0a --- /dev/null +++ b/gnu/packages/patches/flann-cmake-3.11.patch @@ -0,0 +1,84 @@ +Fixes this issue: + <https://github.com/mariusmuja/flann/issues/369>. +Patch from Buildroot: + <https://github.com/buildroot/buildroot/commit/45a39b3e2ba42b72d19bfcef30db1b8da9ead51a>. + +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 |