Workaround for CGAL version 4.8 compilation issue

New target CGAL_WITH_EIGEN3_VERSION set with CGAL_VERSION when CGAL and Eigen3 found to ease CMakeLists.txt


git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/cgal_4.8_issue@2241 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 2fbf1f9397aa1549ba05aa26ac6852b882dce147

1 files changed, 22 insertions, 1 deletions

diff --git a/src/cmake/modules/GUDHI_third_party_libraries.txt b/src/cmake/modules/GUDHI_third_party_libraries.txt
index 1a2b510f..75f73537 100644
--- a/src/cmake/modules/GUDHI_third_party_libraries.txt
+++ b/src/cmake/modules/GUDHI_third_party_libraries.txt
@@ -24,6 +24,7 @@ endif()
 # or even better https://cmake.org/cmake/help/v3.1/variable/CMAKE_CXX_STANDARD.html
 # but it implies to use cmake version 3.1 at least.
 find_package(CGAL)
+
 # Only CGAL versions > 4.4 supports what Gudhi uses from CGAL
 if (CGAL_VERSION VERSION_LESS 4.4.0)
   message("CGAL version ${CGAL_VERSION} is considered too old to be used by Gudhi.")
@@ -34,6 +35,25 @@ if(CGAL_FOUND)
   include( ${CGAL_USE_FILE} )
 
   if (NOT CGAL_VERSION VERSION_LESS 4.8.0)
+    # HACK to detect CGAL version 4.8.0
+    # CGAL version 4.8, 4.8.1 and 4.8.2 are identified as version 4.8.1000)
+    # cf. https://github.com/CGAL/cgal/issues/1559
+    # Limit the HACK between CGAL versions 4.8 and 4.9 because of file read
+    if (NOT CGAL_VERSION VERSION_GREATER 4.9.0)
+      foreach(CGAL_INCLUDE_DIR ${CGAL_INCLUDE_DIRS})
+        if (EXISTS "${CGAL_INCLUDE_DIR}/CGAL/version.h")
+          FILE(READ "${CGAL_INCLUDE_DIR}/CGAL/version.h" contents)
+          STRING(REGEX REPLACE "\n" ";" contents "${contents}")
+          foreach(Line ${contents})
+            if("${Line}" STREQUAL "#define CGAL_VERSION 4.8")
+              set(CGAL_VERSION 4.8.0)
+              message (">>>>> HACK CGAL version to ${CGAL_VERSION}")
+            endif("${Line}" STREQUAL "#define CGAL_VERSION 4.8")
+          endforeach(Line ${contents})
+        endif (EXISTS "${CGAL_INCLUDE_DIR}/CGAL/version.h")
+      endforeach(CGAL_INCLUDE_DIR ${CGAL_INCLUDE_DIRS})
+    endif(NOT CGAL_VERSION VERSION_GREATER 4.9.0)
+
     # For dev version
     include_directories(BEFORE "src/common/include/gudhi_patches")
     # For user version
@@ -50,11 +70,12 @@ if (TBB_FOUND)
   add_definitions(-DGUDHI_USE_TBB)
 endif()
 
+set(CGAL_WITH_EIGEN3_VERSION 0.0.0)
 find_package(Eigen3 3.1.0)
 if (EIGEN3_FOUND)
   message(STATUS "Eigen3 version: ${EIGEN3_VERSION}.")
   include( ${EIGEN3_USE_FILE} )
-  #include_directories (BEFORE "../../include")
+  set(CGAL_WITH_EIGEN3_VERSION ${CGAL_VERSION})
 endif (EIGEN3_FOUND)
 
 # Required programs for unitary tests purpose