add platform check for how to link to the standard math library.

This allows to support QNX.

1 files changed, 18 insertions, 15 deletions

diff --git a/doc/examples/CMakeLists.txt b/doc/examples/CMakeLists.txt
index 29cf078c1..13ec0c123 100644
--- a/doc/examples/CMakeLists.txt
+++ b/doc/examples/CMakeLists.txt
@@ -1,17 +1,20 @@
-FILE(GLOB examples_SRCS "*.cpp")
+file(GLOB examples_SRCS "*.cpp")
 
-ADD_CUSTOM_TARGET(all_examples)
+add_custom_target(all_examples)
 
-FOREACH(example_src ${examples_SRCS})
-GET_FILENAME_COMPONENT(example ${example_src} NAME_WE)
-ADD_EXECUTABLE(${example} ${example_src})
-GET_TARGET_PROPERTY(example_executable
-                    ${example} LOCATION)
-ADD_CUSTOM_COMMAND(
-  TARGET ${example}
-  POST_BUILD
-  COMMAND ${example_executable}
-  ARGS >${CMAKE_CURRENT_BINARY_DIR}/${example}.out
-)
-ADD_DEPENDENCIES(all_examples ${example})
-ENDFOREACH(example_src)
+foreach(example_src ${examples_SRCS})
+  get_filename_component(example ${example_src} NAME_WE)
+  add_executable(${example} ${example_src})
+  if(EIGEN_STANDARD_LIBRARIES_TO_LINK_TO)
+    target_link_libraries(${example} ${EIGEN_STANDARD_LIBRARIES_TO_LINK_TO})
+  endif()
+  get_target_property(example_executable
+                      ${example} LOCATION)
+  add_custom_command(
+    TARGET ${example}
+    POST_BUILD
+    COMMAND ${example_executable}
+    ARGS >${CMAKE_CURRENT_BINARY_DIR}/${example}.out
+  )
+  add_dependencies(all_examples ${example})
+endforeach(example_src)