still test fftw even if the binary for long double is not available

3 files changed, 43 insertions, 19 deletions

diff --git a/cmake/FindFFTW.cmake b/cmake/FindFFTW.cmake
index a56450b17..58b10ea11 100644
--- a/cmake/FindFFTW.cmake
+++ b/cmake/FindFFTW.cmake
@@ -13,8 +13,15 @@ find_path(FFTW_INCLUDES
 
 find_library(FFTWF_LIB NAMES fftw3f PATHS $ENV{FFTWDIR} ${LIB_INSTALL_DIR})
 find_library(FFTW_LIB NAMES fftw3 PATHS $ENV{FFTWDIR} ${LIB_INSTALL_DIR})
+set(FFTW_LIBRARIES "${FFTWF_LIB} ${FFTW_LIB}" )
+
 find_library(FFTWL_LIB NAMES fftw3l  PATHS $ENV{FFTWDIR} ${LIB_INSTALL_DIR})
-set(FFTW_LIBRARIES "${FFTWF_LIB} ${FFTW_LIB} ${FFTWL_LIB}" )
+
+if(FFTWL_LIB)
+set(FFTW_LIBRARIES "${FFTW_LIBRARIES} ${FFTWL_LIB}")
+endif()
+
+
 message(STATUS "FFTW ${FFTW_LIBRARIES}" )
 
 include(FindPackageHandleStandardArgs)
diff --git a/unsupported/test/CMakeLists.txt b/unsupported/test/CMakeLists.txt
index ccf2c5f02..dd9b3a89b 100644
--- a/unsupported/test/CMakeLists.txt
+++ b/unsupported/test/CMakeLists.txt
@@ -82,7 +82,11 @@ ei_add_test(sparse_extra   "" "")
 find_package(FFTW)
 if(FFTW_FOUND)
   ei_add_property(EIGEN_TESTED_BACKENDS "fftw, ")
-  ei_add_test(FFTW  "-DEIGEN_FFTW_DEFAULT " "fftw3;fftw3f;fftw3l" )
+  if(FFTWL_LIB)
+    ei_add_test(FFTW  "-DEIGEN_FFTW_DEFAULT -DEIGEN_HAS_FFTWL" "fftw3;fftw3f;fftw3l" )
+  else()
+    ei_add_test(FFTW  "-DEIGEN_FFTW_DEFAULT " "fftw3;fftw3f" )
+  endif()
 else()
   ei_add_property(EIGEN_MISSING_BACKENDS "fftw, ")
 endif()
diff --git a/unsupported/test/FFTW.cpp b/unsupported/test/FFTW.cpp
index c72dc5647..d3676005a 100644
--- a/unsupported/test/FFTW.cpp
+++ b/unsupported/test/FFTW.cpp
@@ -245,23 +245,36 @@ void test_return_by_value(int len)
 
 void test_FFTW()
 {
-    cout << "testing return-by-value\n";
-    CALL_SUBTEST( test_return_by_value(32) );
-    cout << "testing complex\n";
+  CALL_SUBTEST( test_return_by_value(32) );
   //CALL_SUBTEST( ( test_complex2d<float,4,8> () ) ); CALL_SUBTEST( ( test_complex2d<double,4,8> () ) );
   //CALL_SUBTEST( ( test_complex2d<long double,4,8> () ) );
-  CALL_SUBTEST( test_complex<float>(32) ); CALL_SUBTEST( test_complex<double>(32) ); CALL_SUBTEST( test_complex<long double>(32) );
-  CALL_SUBTEST( test_complex<float>(256) ); CALL_SUBTEST( test_complex<double>(256) ); CALL_SUBTEST( test_complex<long double>(256) );
-  CALL_SUBTEST( test_complex<float>(3*8) ); CALL_SUBTEST( test_complex<double>(3*8) ); CALL_SUBTEST( test_complex<long double>(3*8) );
-  CALL_SUBTEST( test_complex<float>(5*32) ); CALL_SUBTEST( test_complex<double>(5*32) ); CALL_SUBTEST( test_complex<long double>(5*32) );
-  CALL_SUBTEST( test_complex<float>(2*3*4) ); CALL_SUBTEST( test_complex<double>(2*3*4) ); CALL_SUBTEST( test_complex<long double>(2*3*4) );
-  CALL_SUBTEST( test_complex<float>(2*3*4*5) ); CALL_SUBTEST( test_complex<double>(2*3*4*5) ); CALL_SUBTEST( test_complex<long double>(2*3*4*5) );
-  CALL_SUBTEST( test_complex<float>(2*3*4*5*7) ); CALL_SUBTEST( test_complex<double>(2*3*4*5*7) ); CALL_SUBTEST( test_complex<long double>(2*3*4*5*7) );
-
-    cout << "testing scalar\n";
-  CALL_SUBTEST( test_scalar<float>(32) ); CALL_SUBTEST( test_scalar<double>(32) ); CALL_SUBTEST( test_scalar<long double>(32) );
-  CALL_SUBTEST( test_scalar<float>(45) ); CALL_SUBTEST( test_scalar<double>(45) ); CALL_SUBTEST( test_scalar<long double>(45) );
-  CALL_SUBTEST( test_scalar<float>(50) ); CALL_SUBTEST( test_scalar<double>(50) ); CALL_SUBTEST( test_scalar<long double>(50) );
-  CALL_SUBTEST( test_scalar<float>(256) ); CALL_SUBTEST( test_scalar<double>(256) ); CALL_SUBTEST( test_scalar<long double>(256) );
-  CALL_SUBTEST( test_scalar<float>(2*3*4*5*7) ); CALL_SUBTEST( test_scalar<double>(2*3*4*5*7) ); CALL_SUBTEST( test_scalar<long double>(2*3*4*5*7) );
+  CALL_SUBTEST( test_complex<float>(32) ); CALL_SUBTEST( test_complex<double>(32) ); 
+  CALL_SUBTEST( test_complex<float>(256) ); CALL_SUBTEST( test_complex<double>(256) ); 
+  CALL_SUBTEST( test_complex<float>(3*8) ); CALL_SUBTEST( test_complex<double>(3*8) ); 
+  CALL_SUBTEST( test_complex<float>(5*32) ); CALL_SUBTEST( test_complex<double>(5*32) ); 
+  CALL_SUBTEST( test_complex<float>(2*3*4) ); CALL_SUBTEST( test_complex<double>(2*3*4) ); 
+  CALL_SUBTEST( test_complex<float>(2*3*4*5) ); CALL_SUBTEST( test_complex<double>(2*3*4*5) ); 
+  CALL_SUBTEST( test_complex<float>(2*3*4*5*7) ); CALL_SUBTEST( test_complex<double>(2*3*4*5*7) ); 
+
+  CALL_SUBTEST( test_scalar<float>(32) ); CALL_SUBTEST( test_scalar<double>(32) ); 
+  CALL_SUBTEST( test_scalar<float>(45) ); CALL_SUBTEST( test_scalar<double>(45) ); 
+  CALL_SUBTEST( test_scalar<float>(50) ); CALL_SUBTEST( test_scalar<double>(50) ); 
+  CALL_SUBTEST( test_scalar<float>(256) ); CALL_SUBTEST( test_scalar<double>(256) ); 
+  CALL_SUBTEST( test_scalar<float>(2*3*4*5*7) ); CALL_SUBTEST( test_scalar<double>(2*3*4*5*7) ); 
+  
+  #ifdef EIGEN_HAS_FFTWL
+  CALL_SUBTEST( test_complex<long double>(32) );
+  CALL_SUBTEST( test_complex<long double>(256) );
+  CALL_SUBTEST( test_complex<long double>(3*8) );
+  CALL_SUBTEST( test_complex<long double>(5*32) );
+  CALL_SUBTEST( test_complex<long double>(2*3*4) );
+  CALL_SUBTEST( test_complex<long double>(2*3*4*5) );
+  CALL_SUBTEST( test_complex<long double>(2*3*4*5*7) );
+  
+  CALL_SUBTEST( test_scalar<long double>(32) );
+  CALL_SUBTEST( test_scalar<long double>(45) );
+  CALL_SUBTEST( test_scalar<long double>(50) );
+  CALL_SUBTEST( test_scalar<long double>(256) );
+  CALL_SUBTEST( test_scalar<long double>(2*3*4*5*7) );
+  #endif
 }