Merge pull request #1818 from BDoignies/TargetAlias2

Target alias v2

Author: dcoeurjo

ChangeLog.md

@@ -24,6 +24,9 @@ git remote set-head origin -a
 - *Geometry*
   - ConvexityHelper::computeLatticePolytope can now outputs exact lattice polytopes for k-dimensional sets of points in dD, whenever k in 0,1,d-1,d (Jacques-Olivier Lachaud, [#1803](https://github.com/DGtal-team/DGtal/pull/1803))
 
+- *Build*
+  - New DGtal::DGtal target (Bastien Doignies, [#1818](https://github.com/DGtal-team/DGtal/pull/1818))
+
 - *Documentation*
   - Refactoring of the volumetric examples in the Shortcuts (David Coeurjolly, [#1807](https://github.com/DGtal-team/DGtal/pull/1807))
   - Removing the doxygen image includes for the latex target (David Coeurjolly, [#1811](https://github.com/DGtal-team/DGtal/pull/1811))
@@ -40,6 +43,7 @@ git remote set-head origin -a
 
 - *Build*
   - Version is now extracted from the `VERSION` file for CMake and Python builds (Bastien Doignies, [#1810](https://github.com/DGtal-team/DGtal/pull/1810))
+  - Eigen is now properly fetched when DGTAL_ITK_WITH_EIGEN is set (Bastien Doignies, [#1818](https://github.com/DGtal-team/DGtal/pull/1818))
   - Replacing the global compilation flags when `DGTAL_WARNINGS_AS_ERRORS` is set, with per target `target_compile_options` to avoid errors on Boost warnings (David Coeurjolly,  [#1793](https://github.com/DGtal-team/DGtal/pull/1793))
   - Fixing the `make install` command for boost (issue #1794) (Bastien Doignies, [#1793](https://github.com/DGtal-team/DGtal/pull/1793))
   - Add and fix install commands for polyscope dependencies (Bastien Doignies, [#1815](https://github.com/DGtal-team/DGtal/pull§1815))

cmake/CheckDGtalDependencies.cmake

@@ -56,5 +56,8 @@ endif()
 # Fetching Eigen3
 # -----------------------------------------------------------------------------
 include(eigen)
-set(DGtalLibDependencies ${DGtalLibDependencies} Eigen3::Eigen)
-target_compile_definitions(DGtal PUBLIC "-DDGTAL_WITH_EIGEN=true")
+target_compile_definitions(DGtal PUBLIC "-DDGTAL_WITH_EIGEN=true")
+if (TARGET Eigen3::Eigen)
+  set(DGtalLibDependencies ${DGtalLibDependencies} Eigen3::Eigen)
+  target_link_libraries(DGtal PUBLIC Eigen3::Eigen)
+endif()

cmake/CheckDGtalOptionalDependencies.cmake

@@ -115,6 +115,13 @@ if (DGTAL_WITH_ITK)
     target_link_libraries(DGtal PUBLIC ${ITK_LIBRARIES})
     set(DGtalLibDependencies ${DGtalLibDependencies} ${ITK_LIBRARIES})
     target_compile_definitions(DGtal PUBLIC  -DDGTAL_WITH_ITK)
+
+    if (DGTAL_WITH_EIGEN_ITK)
+      set(Eigen3_DIR ${ITKInternalEigen3_DIR})
+      find_package(Eigen3 REQUIRED CONFIG)
+      set(DGtalLibDependencies ${DGtalLibDependencies} Eigen3::Eigen)
+      target_link_libraries(DGtal PUBLIC Eigen3::Eigen)
+    endif()
 
     # -------------------------------------------------------------------------
     # ITK 5.0 adds "/usr/lib/x86_64-linux-gnu/include" to include path which 

src/DGtal/CMakeLists.txt

@@ -3,6 +3,7 @@ if (DGTAL_BUILD_SHARED_LIBS)
 else()
   add_library(DGtal STATIC helpers/StdDefs.cpp)
 endif()
+add_library(DGtal::DGtal ALIAS DGtal)
 
 if( CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64" )
   # Add -fPIC