Adding Eigen library include paths.

src/Makefile.am

@@ -2,6 +2,8 @@ SUBDIRS = celutil celmath cel3ds celtxf celengine celestia
 
 DEFS = -DHIP_DATA_DIR='"$(HIPDIR)"' @DEFS@
 
+INCLUDES = -I$(top_srcdir)/thirdparty/Eigen
+
 dosstuff = winbuild.mak
 buildstardb_SOURCES = buildstardb.cpp
 noinst_DATA = $(dosstuff)

src/celengine/Makefile.am

@@ -8,7 +8,7 @@ EXTRA_DIST = \
 	3dsmesh.cpp \
 	solarsysxml.cpp
 
-INCLUDES = -I..
+INCLUDES = -I.. -I$(top_srcdir)/thirdparty/Eigen
 
 if ENABLE_SPICE
 SPICESOURCES = spiceinterface.cpp spiceorbit.cpp spicerotation.cpp

src/celestia/Makefile.am

@@ -1,7 +1,7 @@
 SUBDIRS = res
 
 bin_PROGRAMS = celestia
-INCLUDES = -I..
+INCLUDES = -I.. -I$(top_srcdir)/thirdparty/Eigen
 
 DEFS = -DCONFIG_DATA_DIR='"$(PKGDATADIR)"' -DLOCALEDIR='"$(datadir)/locale"' @DEFS@
 

src/celestia/gtk/Makefile.am

@@ -1,6 +1,6 @@
 SUBDIRS = data
 
-INCLUDES = -I../..
+INCLUDES = -I../.. -I$(top_srcdir)/thirdparty/Eigen
 
 DEFS = -DCONFIG_DATA_DIR='"$(PKGDATADIR)"' -DLOCALEDIR='"$(datadir)/locale"' @DEFS@
 

src/celestia/kde/Makefile.am

@@ -30,7 +30,7 @@ if ENABLE_KDE
 noinst_LIBRARIES = libkdegui.a
 noinst_HEADERS = $(wildcard *.h)
 
-INCLUDES = -I../.. -I.. $(QT_INCLUDES) $(KDE_INCLUDES)
+INCLUDES = -I../.. -I.. -I$(top_srcdir)/thirdparty/Eigen $(QT_INCLUDES) $(KDE_INCLUDES)
 
 libkdegui_a_SOURCES = \
                  celsplashscreen.moc.cpp \

src/celmath/Makefile.am

@@ -5,7 +5,7 @@ noinst_DATA = $(dosstuff)
 
 EXTRA_DIST = $(noinst_DATA)
 
-INCLUDES = -I..
+INCLUDES = -I.. -I$(top_srcdir)/thirdparty/Eigen
 
 libcelmath_a_SOURCES = \
 	frustum.cpp \