1 files changed, 25 insertions, 19 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ff10f58cb..6fac4fa1f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -141,22 +141,28 @@ ei_testing_print_summary()
 message("")
 message("Configured Eigen ${EIGEN_VERSION_NUMBER}")
 message("You can now do the following:")
-message("-------------+-----------------------------------------------------------------")
-message("Command      |   Description")
-message("-------------+-----------------------------------------------------------------")
-message("make install | Install to ${CMAKE_INSTALL_PREFIX}")
-message("             | To change that, do:   cmake . -DCMAKE_INSTALL_PREFIX=yourpath")
-message("make         | Build the unit tests")
-message("             | Note: that's NOT needed if you just want to install Eigen!")
-message("             | Note: this takes lots of time & memory! Easy on the -j option!")
-message("make test    | Build and run the unit tests (using CTest)")
-message("make test_qr | Build a specific test, here test_qr. To run it:   test/test_qr")
-message("make debug_qr| Build a test with full debug info. To run it:   test/debug_qr")
-message("make blas    | Build BLAS library")
-message("make doc     | Generate the API documentation, requires Doxygen & LaTeX")
-message("-------------+-----------------------------------------------------------------")
-message("")
-message("There's no need to do 'make' unless you really want to build the unit tests!")
-message("")
-
-
+message("--------------+----------------------------------------------------------------")
+message("Command       |   Description")
+message("--------------+----------------------------------------------------------------")
+message("make install  | Install to ${CMAKE_INSTALL_PREFIX}")
+message("              | To change that: cmake . -DCMAKE_INSTALL_PREFIX=yourpath")
+message("make          | Build the unit tests")
+message("              | * That's not needed if you just want to install Eigen!")
+message("              | * That takes lots of memory! Easy on the -j option!")
+message("make test     | Build and run the unit tests (using CTest)")
+message("make test_qr  | Build a specific test, here test_qr. To run it: test/test_qr")
+message("make debug_qr | Build a test with full debug info. To run it: test/debug_qr")
+message("make blas     | Build BLAS library (not the same thing as Eigen)")
+message("make doc      | Generate the API documentation, requires Doxygen & LaTeX")
+message("--------------+----------------------------------------------------------------")
+
+if(NOT EIGEN_CMAKE_ALREADY_RUN)
+  unset(EIGEN_CMAKE_ALREADY_RUN CACHE) # in case it was manually set to OFF in cache
+  set(EIGEN_CMAKE_ALREADY_RUN "ON" CACHE BOOL "Set to ON if CMake has already run here.")
+  message("")
+  message("First-time tip:")
+  message("")
+  message("If you just want to install Eigen, do 'make install' right away.")
+  message("No need to do 'make' before. See INSTALL file for more details.")
+  message("")
+endif(NOT EIGEN_CMAKE_ALREADY_RUN)