Propagate the non-standard installation path of FFTW to the Makefiles.

examples/Makefile.am

@@ -18,8 +18,8 @@
 # Common flags
 MYFLAGS = 
 
-# Add the source directory and debug to CFLAGS
-AM_CFLAGS = -I$(top_srcdir)/src $(HDF5_CPPFLAGS) $(GSL_INCS)
+# Add the source directory and the non-standard paths to the included library headers to CFLAGS
+AM_CFLAGS = -I$(top_srcdir)/src $(HDF5_CPPFLAGS) $(GSL_INCS) $(FFTW_INCS)
 
 AM_LDFLAGS = $(HDF5_LDFLAGS)
 

src/Makefile.am

@@ -15,8 +15,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# Add the debug flag to the whole thing
-AM_CFLAGS = $(HDF5_CPPFLAGS) $(GSL_INCS)
+# Add the non-standard paths to the included library headers
+AM_CFLAGS = $(HDF5_CPPFLAGS) $(GSL_INCS) $(FFTW_INCS)
 
 # Assign a "safe" version number
 AM_LDFLAGS = $(HDF5_LDFLAGS) $(FFTW_LIBS) -version-info 0:0:0

tests/Makefile.am

@@ -14,8 +14,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# Add the source directory and debug to CFLAGS
-AM_CFLAGS = -I$(top_srcdir)/src $(HDF5_CPPFLAGS) $(GSL_INCS)
+# Add the source directory and the non-standard paths to the included library headers to CFLAGS
+AM_CFLAGS = -I$(top_srcdir)/src $(HDF5_CPPFLAGS) $(GSL_INCS) $(FFTW_INCS)
 
 AM_LDFLAGS = ../src/.libs/libswiftsim.a $(HDF5_LDFLAGS) $(HDF5_LIBS) $(FFTW_LIBS) $(GRACKLE_LIBS) $(GSL_LIBS)