diff options
| -rw-r--r-- | CMakeLists.txt | 6 | ||||
| -rw-r--r-- | cmake/Modules/CMakeOverloads.cmake | 70 |
2 files changed, 76 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 006463298b..30a3a03591 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -118,6 +118,12 @@ set(EXPORT_FILE ${CMAKE_BINARY_DIR}/ImportExecutables.cmake) file(WRITE ${EXPORT_FILE}) #blank the file (subdirs will append) ######################################################################## +# Incorporate CMake function/macros overloading. +######################################################################## + +include(CMakeOverloads) + +######################################################################## # Compiler specific setup ######################################################################## include(GrMiscUtils) #compiler flag check diff --git a/cmake/Modules/CMakeOverloads.cmake b/cmake/Modules/CMakeOverloads.cmake new file mode 100644 index 0000000000..04fc777a9f --- /dev/null +++ b/cmake/Modules/CMakeOverloads.cmake @@ -0,0 +1,70 @@ +# Copyright 2017 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. + +######################################################################## +# This file contains functions that override those provided by CMake. +# We do this to allow for more generic use of these functions than as +# provided by CMake. +######################################################################## + +if(DEFINED __INCLUDED_CMAKE_OVERLOADS) + return() +endif() +set(__INCLUDED_CMAKE_OVERLOADS TRUE) + +# overload INCLUDE_DIRECTORIES to be a little smarter +# +# NOTE: moving all include directories to either BEFORE (internal to +# source or build) or AFTER (external to source or build) will work in +# general. The primary time it could fail is when include ordering is +# required to find a specific version of a header when multiple of the +# same name are available in the various include directories. This +# situation seems like it's unlikely, so we ignore it here. + +macro(INCLUDE_DIRECTORIES) + # for each provided include directory ... + foreach(inc_dir ${ARGN}) + + # is this dir the literal string "BEFORE" or "AFTER"? + string(FIND ${inc_dir} BEFORE IS_BEFORE) + string(FIND ${inc_dir} AFTER IS_AFTER) + if(${IS_BEFORE} EQUAL 0 OR ${IS_AFTER} EQUAL 0) + # yes: ignore it + continue() + endif() + + # get absolute path of this include directory + get_filename_component(inc_dir_abs ${inc_dir} ABSOLUTE) + + # is this include directory located within the SOURCE or BUILD? + string(FIND ${inc_dir_abs} ${CMAKE_SOURCE_DIR} IS_IN_SOURCE) + string(FIND ${inc_dir_abs} ${CMAKE_BINARY_DIR} IS_IN_BINARY) + if(${IS_IN_SOURCE} EQUAL 0 OR ${IS_IN_BINARY} EQUAL 0) + # yes: local SOURCE or BINARY; internal. + # call the overloaded INCLUDE_DIRECTORIES, + # prepending this internal directory. + _include_directories(BEFORE ${inc_dir_abs}) + else() + # no: not SOURCE or BUILD; must be external. + # call the overloaded INCLUDE_DIRECTORIES, + # appending this external directory. + _include_directories(AFTER ${inc_dir_abs}) + endif() + endforeach() +endmacro(INCLUDE_DIRECTORIES) |