Add libsvm

CMake/External_libsvm.cmake

@@ -0,0 +1,48 @@
+# libsvm external project
+# Uses CMake wrapper patch for cross-platform builds
+
+# Set up patch command - always applies CMakeLists.txt, optionally applies HIK patch
+set(libsvm_PATCH_COMMAND ${CMAKE_COMMAND}
+  -Dlibsvm_patch:PATH=${fletch_SOURCE_DIR}/Patches/libsvm
+  -Dlibsvm_source:PATH=${fletch_BUILD_PREFIX}/src/libsvm
+  -Dlibsvm_apply_hik_patch:BOOL=${libsvm_apply_patch}
+  -P ${fletch_SOURCE_DIR}/Patches/libsvm/Patch.cmake
+  )
+
+ExternalProject_Add(libsvm
+  URL ${libsvm_url}
+  URL_MD5 ${libsvm_md5}
+  ${COMMON_EP_ARGS}
+  PATCH_COMMAND ${libsvm_PATCH_COMMAND}
+  CMAKE_GENERATOR ${gen}
+  CMAKE_ARGS
+    ${COMMON_CMAKE_ARGS}
+    -DCMAKE_INSTALL_PREFIX:PATH=${fletch_BUILD_INSTALL_PREFIX}
+    -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
+  )
+
+# Install Python bindings if Python support is enabled
+if(fletch_BUILD_WITH_PYTHON)
+  ExternalProject_Add_Step(libsvm install_python
+    COMMAND ${CMAKE_COMMAND} -E make_directory ${fletch_PYTHON_PACKAGES_DIR}
+    COMMAND ${CMAKE_COMMAND} -E copy
+      ${fletch_BUILD_PREFIX}/src/libsvm/python/svm.py
+      ${fletch_PYTHON_PACKAGES_DIR}
+    COMMAND ${CMAKE_COMMAND} -E copy
+      ${fletch_BUILD_PREFIX}/src/libsvm/python/svmutil.py
+      ${fletch_PYTHON_PACKAGES_DIR}
+    DEPENDEES install
+    )
+endif()
+
+fletch_external_project_force_install(PACKAGE libsvm)
+
+set(libsvm_ROOT ${fletch_BUILD_INSTALL_PREFIX} CACHE STRING "")
+
+file(APPEND ${fletch_CONFIG_INPUT} "
+########################################
+# libsvm
+########################################
+set(libsvm_ROOT \${fletch_ROOT})
+set(fletch_ENABLED_libsvm TRUE)
+")

CMake/fletch-tarballs.cmake

@@ -576,6 +576,28 @@ if(NOT WIN32)
   list(APPEND fletch_external_sources LMDB)
 endif()
 
+# libsvm
+if (fletch_ENABLE_libsvm OR fletch_ENABLE_ALL_PACKAGES)
+  set(libsvm_SELECT_VERSION 3.35 CACHE STRING "Select the version of libsvm to build.")
+  set_property(CACHE libsvm_SELECT_VERSION PROPERTY STRINGS "3.11" "3.35")
+endif()
+
+set(libsvm_version ${libsvm_SELECT_VERSION})
+
+if (libsvm_version VERSION_EQUAL 3.11)
+  # Version 3.11 with custom HIK (Histogram Intersection Kernel) patch
+  set(libsvm_url "https://data.kitware.com/api/v1/file/695b3d132129216e86207cdd/download/libsvm.${libsvm_version}.tar.gz")
+  set(libsvm_md5 "495a2177c45f0415b056aecf099d3700")
+  set(libsvm_apply_patch TRUE)
+elseif (libsvm_version VERSION_EQUAL 3.35)
+  set(libsvm_url "https://data.kitware.com/api/v1/file/695b3d142129216e86207ce0/download/libsvm.${libsvm_version}.tar.gz")
+  set(libsvm_md5 "93228a1542099b7d19d64290b8a5f571")
+  set(libsvm_apply_patch FALSE)
+elseif(libsvm_version)
+  message(ERROR "libsvm version ${libsvm_version} not supported")
+endif()
+list(APPEND fletch_external_sources libsvm)
+
 # HDF5
 if (fletch_ENABLE_HDF5 OR fletch_ENABLE_ALL_PACKAGES)
   set(HDF5_SELECT_VERSION 1.12.0 CACHE STRING "Select the major version of HDF5 to build.")

Patches/libsvm/CMakeLists.txt

@@ -0,0 +1,32 @@
+cmake_minimum_required(VERSION 3.3)
+project(libsvm VERSION 3.11 LANGUAGES CXX)
+
+# Build shared library from svm.cpp
+add_library(svm SHARED svm.cpp)
+
+# Set library properties
+set_target_properties(svm PROPERTIES
+  PUBLIC_HEADER svm.h
+  VERSION ${PROJECT_VERSION}
+  SOVERSION 2
+)
+
+# Platform-specific settings
+if(MSVC)
+  # Export all symbols on Windows
+  set_target_properties(svm PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON)
+  target_compile_definitions(svm PRIVATE _CRT_SECURE_NO_WARNINGS)
+endif()
+
+# Link math library on Unix
+if(UNIX)
+  target_link_libraries(svm PRIVATE m)
+endif()
+
+# Install targets
+install(TARGETS svm
+  RUNTIME DESTINATION bin
+  LIBRARY DESTINATION lib
+  ARCHIVE DESTINATION lib
+  PUBLIC_HEADER DESTINATION include
+)

Patches/libsvm/Patch.cmake

@@ -0,0 +1,23 @@
+#+
+# This file is called as CMake -P script for the patch step of
+# External_libsvm.cmake.
+# libsvm_patch and libsvm_source are defined on the command line along with the
+# call.
+#
+# This patch adds:
+# - CMakeLists.txt for cross-platform CMake builds
+# - Custom kernel types (HISTOGRAM and NMI) for Histogram Intersection Kernel
+#   support, matching the smqtk custom libsvm (when libsvm_apply_hik_patch is set)
+#-
+
+message("Patching libsvm with CMake build support")
+
+# Always copy CMakeLists.txt for cross-platform build support
+file(COPY ${libsvm_patch}/CMakeLists.txt DESTINATION ${libsvm_source})
+
+# Copy HIK-patched source files if requested
+if(libsvm_apply_hik_patch)
+  message("Patching libsvm with HIK (Histogram Intersection Kernel) support")
+  file(COPY ${libsvm_patch}/svm.h DESTINATION ${libsvm_source})
+  file(COPY ${libsvm_patch}/svm.cpp DESTINATION ${libsvm_source})
+endif()