Improved doc build system

doc/CMakeLists.txt

-set(TARGET manual)
-set(REFERENCES references)
-find_package(LATEX)
+include(${PROJECT_SOURCE_DIR}/cmake/UseLATEX.cmake)
 
-if (EXISTS ${PDFLATEX_COMPILER} AND EXISTS ${BIBTEX_COMPILER})
+add_latex_document(manual.tex BIBFILES references.bib DEFAULT_PDF)
 
-    add_custom_command(
-        OUTPUT    ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.aux
-        DEPENDS   ${CMAKE_CURRENT_SOURCE_DIR}/${TARGET}.tex
-        COMMAND   ${PDFLATEX_COMPILER}
-        ARGS      -interaction=batchmode ${CMAKE_CURRENT_SOURCE_DIR}/${TARGET}
-        COMMENT   "Latex (first pass)"
-        VERBATIM
-    )
-    
-    add_custom_command(
-        OUTPUT    ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.bbl
-        DEPENDS   ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.aux
-                  ${CMAKE_CURRENT_SOURCE_DIR}/${REFERENCES}.bib
-        COMMAND   ${BIBTEX_COMPILER}
-        ARGS      -terse ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}
-        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-        COMMENT   "Bibtex"
-    )
+add_custom_command(
+    OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/manual.pdf
+    DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/manual.pdf
+    COMMAND ${CMAKE_COMMAND} -E copy
+    ARGS ${CMAKE_CURRENT_BINARY_DIR}/manual.pdf ${CMAKE_CURRENT_SOURCE_DIR}/manual.pdf
+)
 
-    add_custom_command(
-        OUTPUT    ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.pdf
-        DEPENDS   ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.bbl
-        COMMAND   ${PDFLATEX_COMPILER}
-        ARGS      -interaction=batchmode ${CMAKE_CURRENT_SOURCE_DIR}/${TARGET}
-        COMMENT   "Latex (second pass)"
-    )
+add_custom_target(doc DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/manual.pdf)
 
-    add_custom_command(
-        OUTPUT    ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.log
-        DEPENDS   ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.bbl
-                  ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.pdf
-        COMMAND   ${PDFLATEX_COMPILER}
-        ARGS      -interaction=batchmode ${CMAKE_CURRENT_SOURCE_DIR}/${TARGET} 
-        COMMENT   "Latex (third pass)"
-    )
-    # Eventually trigger the whole process
+install(
+    FILES manual.pdf
+    DESTINATION share/doc/flann
+)
 
-    add_custom_command(
-        OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/${TARGET}.pdf
-        DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.pdf
-                ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.log
-        COMMAND ${CMAKE_COMMAND} -E copy
-        ARGS ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.pdf ${CMAKE_CURRENT_SOURCE_DIR}/${TARGET}.pdf
-    )
-
-    add_custom_target(doc
-        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${TARGET}.pdf
-    )
-
-    install (
-        FILES ${CMAKE_CURRENT_SOURCE_DIR}/${TARGET}.pdf
-        DESTINATION share/doc/flann
-    )
-endif()