tappa/CMakeLists.txt at main · rspatial/tappa · GitHub

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cmake_minimum_required(VERSION 3.18)
project(terra CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

# ── pybind11 ────────────────────────────────────────────────────────────────
# Installed via:  pip install pybind11
# or via cmake:   find_package(pybind11 CONFIG REQUIRED)
find_package(pybind11 CONFIG REQUIRED)


# ── GDAL ────────────────────────────────────────────────────────────────────
find_package(GDAL REQUIRED)


# ── GEOS ────────────────────────────────────────────────────────────────────
# Try cmake config first (GEOS >= 3.9 ships one), fall back to pkg-config.
find_package(GEOS QUIET CONFIG)
if (NOT GEOS_FOUND)
    find_package(PkgConfig REQUIRED)
    pkg_check_modules(GEOS REQUIRED geos)
endif()


# ── PROJ ────────────────────────────────────────────────────────────────────
find_package(PROJ CONFIG QUIET)
if (NOT PROJ_FOUND)
    find_package(PkgConfig REQUIRED)
    pkg_check_modules(PROJ REQUIRED proj)
endif()


# ── terra C++ core (mirrored from rspatial/terra src/) ──────────────────────
# Lives in terra_lib/; Python package + extension output live under src/.
# Optional _tappa_cpp_src: legacy CI vendored copy of terra_lib.
if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/_tappa_cpp_src")
    set(TERRA_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/_tappa_cpp_src")
elseif (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/terra_lib/spatRaster.cpp")
    set(TERRA_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/terra_lib")
elseif (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/src/spatRaster.cpp")
    set(TERRA_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/src")
else()
    set(TERRA_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../src")
endif()

file(GLOB TERRA_SOURCES "${TERRA_SRC_DIR}/*.cpp")

# Drop Rcpp bridge sources (R package only); matches sync excludes on terra_lib/.
list(FILTER TERRA_SOURCES EXCLUDE REGEX ".*/Rcpp[^/]*\\.cpp$")


# GEOS feature macros (GEOS350, GEOS380, …) come from geos_spat.h via GEOS_VERSION_*.

# ── PROJ version flag ────────────────────────────────────────────────────────
if (PROJ_FOUND)
    if (DEFINED PROJ_VERSION)
        set(_proj_ver "${PROJ_VERSION}")
    elseif (DEFINED PROJ_VERSION_STRING)
        set(_proj_ver "${PROJ_VERSION_STRING}")
    else()
        set(_proj_ver "0.0.0")
    endif()
    if (_proj_ver VERSION_GREATER_EQUAL "6.0")
        set(PROJ_CXXFLAGS "HAVE_PROJ_H")   # no -D prefix; CMake adds it
    endif()
endif()


# ── TBB (optional) ──────────────────────────────────────────────────────────
find_package(TBB QUIET)
if (TBB_FOUND)
    set(TBB_LINK_LIBS TBB::tbb)
    set(TBB_COMPILE_DEFS HAVE_TBB)
endif()


# ── Build the extension ──────────────────────────────────────────────────────
pybind11_add_module(_terra
    native/terra_module.cpp
    ${TERRA_SOURCES}
)

target_include_directories(_terra PRIVATE
    ${TERRA_SRC_DIR}
    ${GDAL_INCLUDE_DIRS}
)

# Absorb GEOS / PROJ include directories whether they came from cmake config
# packages (targets) or from pkg-config (variables).
if (TARGET GEOS::geos_c)
    target_link_libraries(_terra PRIVATE GEOS::geos_c)
elseif (DEFINED GEOS_INCLUDE_DIRS)
    target_include_directories(_terra PRIVATE ${GEOS_INCLUDE_DIRS})
    target_link_directories(_terra PRIVATE ${GEOS_LIBRARY_DIRS})
    target_link_libraries(_terra PRIVATE ${GEOS_LIBRARIES})
endif()

if (TARGET PROJ::proj)
    target_link_libraries(_terra PRIVATE PROJ::proj)
elseif (DEFINED PROJ_INCLUDE_DIRS)
    target_include_directories(_terra PRIVATE ${PROJ_INCLUDE_DIRS})
    target_link_directories(_terra PRIVATE ${PROJ_LIBRARY_DIRS})
    target_link_libraries(_terra PRIVATE ${PROJ_LIBRARIES})
endif()

target_link_libraries(_terra PRIVATE
    GDAL::GDAL
    ${TBB_LINK_LIBS}
)

target_compile_definitions(_terra PRIVATE
    standalone          # suppresses useRcpp; keeps useGDAL active
    ${PROJ_CXXFLAGS}
    ${TBB_COMPILE_DEFS}
)

# Place the built .so / .pyd directly inside the Python package directory so
# an editable install (pip install -e .) works without further configuration.
set_target_properties(_terra PROPERTIES
    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/src/tappa"
)