adam-ce · Oct 29, 2026 · Oct 29, 2026 · Oct 29, 2026
diff --git a/cmake/SetupGDAL.cmake b/cmake/SetupGDAL.cmake
@@ -21,29 +21,35 @@ if(NOT COMMAND alp_setup_cmake_project)
 endif()
 
 function(alp_setup_gdal)
-    set(oneValueArgs GDAL_VERSION GEOS_VERSION PROJ_VERSION)
+    set(oneValueArgs GDAL_VERSION GDAL_SHA256 GEOS_VERSION GEOS_SHA256 PROJ_VERSION PROJ_SHA256)
     cmake_parse_arguments(ARG "" "${oneValueArgs}" "" ${ARGN})
 
-    if(NOT ARG_GDAL_VERSION OR NOT ARG_GEOS_VERSION OR NOT ARG_PROJ_VERSION)
-        message(FATAL_ERROR "alp_setup_gdal() needs: GDAL_VERSION <tag> GEOS_VERSION <tag> PROJ_VERSION <tag>")
+    if(NOT ARG_GDAL_VERSION OR NOT ARG_GDAL_SHA256
+            OR NOT ARG_GEOS_VERSION OR NOT ARG_GEOS_SHA256
+            OR NOT ARG_PROJ_VERSION OR NOT ARG_PROJ_SHA256)
+        message(FATAL_ERROR "alp_setup_gdal() needs VERSION and SHA256 arguments for GDAL, GEOS and PROJ")
     endif()
 
-    alp_setup_cmake_project(proj URL https://github.com/OSGeo/PROJ.git COMMITISH ${ARG_PROJ_VERSION} CMAKE_ARGUMENTS -DBUILD_TESTING=OFF -DBUILD_APPS=OFF)
+    alp_setup_cmake_project(proj
+        URL https://download.osgeo.org/proj/proj-${ARG_PROJ_VERSION}.tar.gz
+        SHA256 ${ARG_PROJ_SHA256}
+        CMAKE_ARGUMENTS -DBUILD_TESTING=OFF -DBUILD_APPS=OFF)
     find_package(PROJ CONFIG REQUIRED)
 
     alp_setup_cmake_project(geos
-        URL https://github.com/libgeos/geos.git
-        COMMITISH ${ARG_GEOS_VERSION}
+        URL https://download.osgeo.org/geos/geos-${ARG_GEOS_VERSION}.tar.bz2
+        SHA256 ${ARG_GEOS_SHA256}
         CMAKE_ARGUMENTS
             -DBUILD_SHARED_LIBS=OFF
             -DBUILD_TESTING=OFF
             -DGEOS_BUILD_DEVELOPER=OFF
             -DCMAKE_POSITION_INDEPENDENT_CODE=ON
     )
 
+    string(REGEX REPLACE "^v" "" _gdal_version "${ARG_GDAL_VERSION}")
     alp_setup_cmake_project(gdal
-        URL https://github.com/OSGeo/gdal.git
-        COMMITISH ${ARG_GDAL_VERSION}
+        URL https://github.com/OSGeo/gdal/releases/download/v${_gdal_version}/gdal-${_gdal_version}.tar.gz
+        SHA256 ${ARG_GDAL_SHA256}
         CMAKE_ARGUMENTS
             -DGDAL_BUILD_OPTIONAL_DRIVERS=OFF
             -DGDAL_ENABLE_DRIVER_HFA=ON

diff --git a/cmake/SetupOpenCV.cmake b/cmake/SetupOpenCV.cmake
@@ -20,14 +20,15 @@ if(NOT COMMAND alp_setup_cmake_project)
     include(${CMAKE_CURRENT_LIST_DIR}/SetupCMakeProject.cmake)
 endif()
 
-function(alp_setup_opencv version)
+function(alp_setup_opencv version sha256)
     set(_alp_opencv_sanitizer_arguments)
     if(ALP_ENABLE_ADDRESS_SANITIZER OR ALP_ENABLE_THREAD_SANITIZER)
         list(APPEND _alp_opencv_sanitizer_arguments -DOPENCV_SKIP_LINK_NO_UNDEFINED=ON)
     endif()
 
     alp_setup_cmake_project(opencv
-        URL https://github.com/opencv/opencv.git COMMITISH ${version}
+        URL https://github.com/opencv/opencv/archive/refs/tags/${version}.tar.gz
+        SHA256 ${sha256}
         CMAKE_ARGUMENTS
             ${_alp_opencv_sanitizer_arguments}
             -DBUILD_TESTS=OFF

diff --git a/misc/suppression/ubsan.txt b/misc/suppression/ubsan.txt
@@ -13,12 +13,12 @@ bool:CGAL::Trapezoidal_decomposition_2<*::set_with_guarantees(bool)
 
 # OpenCV's random-number dispatch casts typed functions to a common signature.
 # Suppress only function-type diagnostics in that implementation.
-function:*opencv/modules/core/src/rand.cpp
+function:*opencv*/modules/core/src/rand.cpp
 
 # OpenCV's IPP color conversion dispatch casts typed functions to a common signature.
 # Suppress only function-type diagnostics in that implementation.
-function:*opencv/modules/imgproc/src/color.hpp
+function:*opencv*/modules/imgproc/src/color.hpp
 
 # OpenCV's IPP resize fallback uses -1 as an unsupported-interpolation sentinel.
 # Suppress only enum diagnostics in that implementation.
-enum:*opencv/modules/imgproc/src/resize.cpp
+enum:*opencv*/modules/imgproc/src/resize.cpp
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
@@ -27,9 +27,13 @@ find_package(ZLIB REQUIRED)
 
 alp_add_git_repository(fmt URL https://github.com/fmtlib/fmt COMMITISH 12.2.0)
 
-alp_add_git_repository(eigen URL https://gitlab.com/libeigen/eigen.git COMMITISH 3.4.0 DO_NOT_ADD_SUBPROJECT)
+alp_setup_cmake_project(eigen
+    URL https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.gz
+    SHA256 8586084f71f9bde545ee7fa6d00288b264a2b7ac3607b974e54d13e7162c1c72
+    CMAKE_ARGUMENTS -DBUILD_TESTING=OFF -DEIGEN_BUILD_DOC=OFF)
+find_package(Eigen3 CONFIG REQUIRED)
 add_library(Eigen3 INTERFACE)
-target_include_directories(Eigen3 SYSTEM INTERFACE ${eigen_SOURCE_DIR})
+target_link_libraries(Eigen3 INTERFACE Eigen3::Eigen)
 
 alp_setup_cmake_project(boost
     URL https://github.com/boostorg/boost/releases/download/boost-1.88.0/boost-1.88.0-cmake.tar.xz
@@ -40,17 +44,29 @@ alp_setup_cmake_project(boost
         "-DBOOST_INCLUDE_LIBRARIES=graph\;multiprecision\;heap\;format\;logic")
 find_package(Boost CONFIG REQUIRED)
 
-alp_setup_cmake_project(tbb URL https://github.com/uxlfoundation/oneTBB.git COMMITISH v2023.1.0 CMAKE_ARGUMENTS -DTBB_TEST=OFF -DTBBMALLOC_BUILD=OFF)
+alp_setup_cmake_project(tbb
+    URL https://github.com/uxlfoundation/oneTBB/archive/refs/tags/v2023.1.0.tar.gz
+    SHA256 191288b52e1e6b17198000b64d77d194bb65e791be46ebc606e9b091781e2070
+    CMAKE_ARGUMENTS -DTBB_TEST=OFF -DTBBMALLOC_BUILD=OFF)
 find_package(TBB REQUIRED)
 
 include(../cmake/SetupGDAL.cmake)
-alp_setup_gdal(GDAL_VERSION v3.10.3 GEOS_VERSION 3.13.1 PROJ_VERSION 9.6.0)
-
-alp_setup_cmake_project(cgal URL https://github.com/CGAL/cgal.git COMMITISH "v6.0.1" CMAKE_ARGUMENTS -DBUILD_TESTING=OFF -DWITH_examples=OFF)
+alp_setup_gdal(
+    GDAL_VERSION v3.10.3
+    GDAL_SHA256 e4bf7f104acbcb3e2d16c97fd1af2b92b28d0ba59d17d976e3ef08b794f4153b
+    GEOS_VERSION 3.13.1
+    GEOS_SHA256 df2c50503295f325e7c8d7b783aca8ba4773919cde984193850cf9e361dfd28c
+    PROJ_VERSION 9.6.0
+    PROJ_SHA256 d8cae521c311c39513193657e75767f7cfbf2f91bd202fcd4a200028d3b57e14)
+
+alp_setup_cmake_project(cgal
+    URL https://github.com/CGAL/cgal/releases/download/v6.0.1/CGAL-6.0.1-library.tar.xz
+    SHA256 c752737f91d1af71fa96038f0e37945ce82a5f1fffb6200172cfcdd77755a356
+    CMAKE_ARGUMENTS -DBUILD_TESTING=OFF -DWITH_examples=OFF)
 find_package(CGAL REQUIRED)
 
 include(../cmake/SetupOpenCV.cmake)
-alp_setup_opencv(4.11.0)
+alp_setup_opencv(4.11.0 9a7c11f924eff5f8d8070e297b322ee68b9227e003fd600d4b8122198091665f)
 
 include(../cmake/SetupJpegXL.cmake)
 alp_setup_jpegxl(v0.12.0)
@@ -98,10 +114,6 @@ alp_add_git_repository(meshoptimizer URL https://github.com/zeux/meshoptimizer.g
 
 alp_add_git_repository(wideinteger URL https://github.com/ckormanyos/wide-integer.git COMMITISH 719cbbd557fe974f48b055568e2b149b2444bee9)
 
-set(LIBIGL_COPYLEFT_CORE ON)
-set(LIBIGL_RESTRICTED_TRIANGLE ON)
-alp_add_git_repository(libigl URL https://github.com/libigl/libigl.git COMMITISH v2.6.0)
-
 alp_add_git_repository(radix URL https://github.com/AlpineMapsOrg/radix.git COMMITISH 799db1af54a1f58454800e899bfc7fc544711834 NOT_SYSTEM)
 
 set(ALP_CLI_COMPONENT_OPTIONS

diff --git a/src/terrainlib/CMakeLists.txt b/src/terrainlib/CMakeLists.txt
@@ -113,12 +113,6 @@ add_library(terrainlib
     mesh/encode.h
     mesh/geometry.h mesh/geometry.cpp
     mesh/holes.h mesh/holes.cpp
-    mesh/igl/convert.h
-    mesh/igl/cut.h
-    mesh/igl/cut_to_disk.h
-    mesh/igl/igl.cpp
-    mesh/igl/manifold.h
-    mesh/igl/orient.h
     mesh/io.h mesh/io.cpp
     mesh/io/gltf.h mesh/io/gltf.cpp
     mesh/io/options.h
@@ -246,7 +240,6 @@ add_library(terrainlib
     uv/unwrap.h uv/unwrap.cpp
 )
 set_source_files_properties(
-    mesh/igl/igl.cpp
     mesh/io/gltf.cpp
     PROPERTIES SKIP_UNITY_BUILD_INCLUSION ON
 )
@@ -280,8 +273,6 @@ target_link_libraries(terrainlib PUBLIC
     magic_enum::magic_enum
     meshoptimizer
     WideInteger
-    igl::core
-    igl_restricted::triangle
     xatlas
 )