build: make SeExpr support optional

Only enable SeExpr support when PARTIO_SE_ENABLED is specified to cmake.
Provide this value from the Makefile when RP_SeExpr is specified so that
users only need to specify the path to SeExpr when using the Makefile.

Closes #62

CMakeLists.txt

@@ -48,6 +48,9 @@ SET( ${PROJECT_NAME}_PATCH_LEVEL 0 )
 
 include(GNUInstallDirs)
 
+# PARTIO_SE_ENABLED enables SeExpr support
+option(PARTIO_SE_ENABLED "PARTIO_SE_ENABLED" false)
+
 ## Setup platform specific helper defines build variants
 IF(WIN32)
   ADD_DEFINITIONS (-DPARTIO_WIN32 -D_USE_MATH_DEFINES)
@@ -95,11 +98,14 @@ SET( PARTIO_LIBRARIES partio ${ZLIB_LIBRARY} )
 # make it so partio can be found
 INCLUDE_DIRECTORIES( ${CMAKE_SOURCE_DIR}/src/lib )
 
-SET(SEEXPR_BASE "c:/aselle/seexpr-inst" CACHE STRING "path to SeExpr")
-SET(SEEXPR_INCLUDE_PATH ${SEEXPR_BASE}/include)
-SET(SEEXPR_LIBDIR ${CMAKE_INSTALL_LIBDIR})
-SET(SEEXPR_LINK_PATH ${SEEXPR_BASE}/${SEEXPR_LIBDIR})
-SET(SEEXPR_LIBS "SeExpr")
+if (${PARTIO_SE_ENABLED})
+    add_definitions(-DPARTIO_SE_ENABLED=1)
+    SET(SEEXPR_BASE "c:/aselle/seexpr-inst" CACHE STRING "path to SeExpr")
+    SET(SEEXPR_INCLUDE_PATH ${SEEXPR_BASE}/include)
+    SET(SEEXPR_LIBDIR ${CMAKE_INSTALL_LIBDIR})
+    SET(SEEXPR_LINK_PATH ${SEEXPR_BASE}/${SEEXPR_LIBDIR})
+    SET(SEEXPR_LIBS "SeExpr")
+endif ()
 
 
 ## Traverse subdirectories

Makefile

@@ -19,11 +19,16 @@ ifdef V
     export VERBOSE
 endif
 
+# Installation location: prefix=<path>
 CMAKE_FLAGS += -DCMAKE_INSTALL_PREFIX=$(prefix)
+
+# SeExpr v2 location: RP_SeExpr=<path>
 ifdef RP_SeExpr
     CMAKE_FLAGS += -DSEEXPR_BASE=$(RP_SeExpr)
+    CMAKE_FLAGS += -DPARTIO_SE_ENABLED=1
 endif
 
+# Extra cmake flags: CMAKE_EXTRA_FLAGS=<flags>
 ifdef CMAKE_EXTRA_FLAGS
     CMAKE_FLAGS += $(CMAKE_EXTRA_FLAGS)
 endif

README.md

@@ -27,15 +27,24 @@ Getting Started
 CMake is used to build the project, but we provide a top-level Makefile
 for convenience that takes care of all the steps.
 
-See the Makefile for the user-tweakable variables.
+See the Makefile for the user-tweakable variables and corresponding
+cmake options.
+
 The typical usage for an installation into `/usr/local`
 with a temporary staging directory of `/tmp/stage` is:
 
     make DESTDIR=/tmp/stage RP_SeExpr=/usr/local prefix=/usr/local install
 
+SeExpr
+======
 Partio depends on SeExpr v2 (current `v2.11`).  SeExpr v2 and v3 can co-exist,
 so you can have v2 for building partio installed alongside SeExpr v3+ (master).
 
+SeExpr is not strictly required. SeExpr support is disabled when `RP_SeExpr`
+is not specified to the Makefile.  In CMake, the corresponding variables are
+`-DSEEXPR_BASE=<path>` for the SeExpr location, and `-DPARTIO_SE_ENABLED=1`
+to enable the PartioSe class.
+
 Source code overview
 ====================
 

src/lib/CMakeLists.txt

@@ -44,9 +44,11 @@ IF(SEEXPR_BASE)
 INCLUDE_DIRECTORIES(${SEEXPR_INCLUDE_PATH})
 LINK_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR})
 LINK_DIRECTORIES(${SEEXPR_LINK_PATH})
-ADD_LIBRARY (partioSe SHARED PartioSe.cpp)
-target_link_libraries(partioSe ${PARTIO_LIBRARIES} ${SEEXPR_LIBS})
-INSTALL (TARGETS partioSe DESTINATION ${CMAKE_INSTALL_LIBDIR})
+if (${PARTIO_SE_ENABLED})
+    ADD_LIBRARY (partioSe SHARED PartioSe.cpp)
+    target_link_libraries(partioSe ${PARTIO_LIBRARIES} ${SEEXPR_LIBS})
+    INSTALL (TARGETS partioSe DESTINATION ${CMAKE_INSTALL_LIBDIR})
+endif ()
 ENDIF(SEEXPR_BASE)
 
 FILE(GLOB public_includes "*.h")

src/py/CMakeLists.txt

@@ -62,7 +62,11 @@ SET_SOURCE_FILES_PROPERTIES(partio.i PROPERTIES CPLUSPLUS ON)
 SET_SOURCE_FILES_PROPERTIES(partio.i PROPERTIES SWIG_FLAGS "-includeall")
 LINK_DIRECTORIES(${SEEXPR_LINK_PATH})
 SWIG_ADD_MODULE(partio python partio.i)
-SWIG_LINK_LIBRARIES(partio ${PYTHON_LIBRARIES} ${ZLIB_LIBRARY} partio partioSe ${SEEXPR_LIBS})
+if (${PARTIO_SE_ENABLED})
+    SWIG_LINK_LIBRARIES(partio ${PYTHON_LIBRARIES} ${ZLIB_LIBRARY} partio partioSe ${SEEXPR_LIBS})
+else ()
+    SWIG_LINK_LIBRARIES(partio ${PYTHON_LIBRARIES} ${ZLIB_LIBRARY} partio)
+endif ()
 
 SET(PYTHON_DEST "${CMAKE_INSTALL_LIBDIR}/python${PYTHON_VERSION}/site-packages" )
 INSTALL(TARGETS _partio DESTINATION ${PYTHON_DEST})

src/py/partio.i

@@ -40,7 +40,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 %{
 #include <Partio.h>
 #include <PartioIterator.h>
+#if PARTIO_SE_ENABLED
 #include <PartioSe.h>
+#endif
 #include <sstream>
 namespace Partio{
 typedef uint64_t ParticleIndex;
@@ -553,6 +555,7 @@ void print(const ParticlesData* particles);
 %feature("docstring","Creates a clustered particle set");
 ParticlesDataMutable* computeClustering(ParticlesDataMutable* particles,const int numNeighbors,const double radiusSearch,const double radiusInside,const int connections,const double density)=0;
 
+#if PARTIO_SE_ENABLED
 class PartioSe{
   public:
     PartioSe(ParticlesDataMutable* parts,const char* expr);
@@ -562,3 +565,4 @@ class PartioSe{
     bool runRange(int istart,int iend);
     void setTime(float val);
 };
+#endif