catkin: relocate dependency's headers to current sysroot

If a package (A) depends on another package (B) and the package
B depends on Boost then it might happen that B produces BConfig.cmake
file where absolute paths to Boost's headers are put (because CMake's
standard FindBoost.cmake module reports absolute paths). In case of
Yocto it means that BConfig.cmake will contain something like
/path/to/build/tmp-glibc/work/i586/package_B/0.0.1/recipe-sysroot/usr/include.
The path may not exist at the moment when the package A is being built.
And that leads to the failure of the check this patch switches off.

The problem has been reported to catkin's issue tracker:
https://github.com/ros/catkin/issues/851

This patch "relocates" required headers from dependencies' sysroots
to the current sysroot by removing sysroot prefix from include dirs
in *Config.cmake files at the moment the files get created and
by prepending the include dirs again with the current sysroot prefix.

Signed-off-by: Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com>

recipes-ros/catkin/catkin.inc

@@ -13,6 +13,7 @@ SRC_URI += "\
     file://0001-CATKIN_WORKSPACES-Don-t-require-.catkin-file.patch \
     file://0001-use-python-provided-by-environment-instead-of-the-ge.patch \
     file://0001-avoid-using-host-s-paths-when-cross-compiling.patch \
+    file://0001-relocate-dependency-s-headers-to-current-sysroot.patch \
     "
 
 inherit catkin

recipes-ros/catkin/files/0001-relocate-dependency-s-headers-to-current-sysroot.patch

@@ -0,0 +1,80 @@
+From b0ad0d6e6a7872c59180596d29ac5f52723c4317 Mon Sep 17 00:00:00 2001
+From: Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com>
+Date: Wed, 22 Feb 2017 13:48:37 +0200
+Subject: [PATCH] relocate dependency's headers to current sysroot
+
+If a package (A) depends on another package (B) and the package
+B depends on Boost then it might happen that B produces BConfig.cmake
+file where absolute paths to Boost's headers are put (because CMake's
+standard FindBoost.cmake module reports absolute paths). In case of
+Yocto it means that BConfig.cmake will contain something like
+/path/to/build/tmp-glibc/work/i586/package_B/0.0.1/recipe-sysroot/usr/include.
+The path may not exist at the moment when the package A is being built.
+And that leads to the failure of the check this patch switches off.
+
+The problem has been reported to catkin's issue tracker:
+https://github.com/ros/catkin/issues/851
+
+This patch "relocates" required headers from dependencies' sysroots
+to the current sysroot by removing sysroot prefix from include dirs
+in *Config.cmake files at the moment the files get created and
+by prepending the include dirs again with the current sysroot prefix.
+
+Upstream-Status: Inappropriate [suitable for Yocto's RSS feature only]
+
+Signed-off-by: Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com>
+
+---
+ cmake/catkin_package.cmake         |  5 ++++-
+ cmake/templates/pkgConfig.cmake.in | 10 +++++++---
+ 2 files changed, 11 insertions(+), 4 deletions(-)
+
+diff --git a/cmake/catkin_package.cmake b/cmake/catkin_package.cmake
+index 71f700f..818ccd9 100644
+--- a/cmake/catkin_package.cmake
++++ b/cmake/catkin_package.cmake
+@@ -161,7 +161,10 @@ function(_catkin_package)
+           if(NOT ${${depend_name}_FOUND})
+             message(FATAL_ERROR "catkin_package() DEPENDS on '${depend_name}' which must be find_package()-ed before. If it is a catkin package it can be declared as CATKIN_DEPENDS instead without find_package()-ing it.")
+           endif()
+-          list(APPEND PROJECT_DEPENDENCIES_INCLUDE_DIRS ${${depend_name}_INCLUDE_DIRS})
++          foreach(incdir ${${depend_name}_INCLUDE_DIRS})
++            string(REPLACE ${ROOT_PATH} "" tweaked_idir ${incdir})
++            list_append_deduplicate(PROJECT_DEPENDENCIES_INCLUDE_DIRS ${tweaked_idir})
++          endforeach()
+           list(APPEND PROJECT_DEPENDENCIES_LIBRARIES ${${depend_name}_LIBRARIES})
+         endif()
+       endforeach()
+diff --git a/cmake/templates/pkgConfig.cmake.in b/cmake/templates/pkgConfig.cmake.in
+index c692108..683ef67 100644
+--- a/cmake/templates/pkgConfig.cmake.in
++++ b/cmake/templates/pkgConfig.cmake.in
+@@ -94,18 +94,22 @@ set(@PROJECT_NAME@_FOUND_CATKIN_PROJECT TRUE)
+ if(NOT "@PROJECT_CMAKE_CONFIG_INCLUDE_DIRS@ " STREQUAL " ")
+   set(@PROJECT_NAME@_INCLUDE_DIRS "")
+   set(_include_dirs "@PROJECT_CMAKE_CONFIG_INCLUDE_DIRS@")
++  list(GET CMAKE_FIND_ROOT_PATH 0 root_path)
+   foreach(idir ${_include_dirs})
++    if(IS_ABSOLUTE ${idir} AND NOT "${idir}" MATCHES "^${root_path}.*")
++      set(idir "${root_path}${idir}")
++    endif()
+     if(IS_ABSOLUTE ${idir} AND IS_DIRECTORY ${idir})
+-      set(include ${idir})
++      _list_append_unique(@PROJECT_NAME@_INCLUDE_DIRS ${idir})
+     elseif("${idir} " STREQUAL "@CATKIN_GLOBAL_INCLUDE_DESTINATION@ ")
+       get_filename_component(include "${@PROJECT_NAME@_DIR}/../../../@CATKIN_GLOBAL_INCLUDE_DESTINATION@" ABSOLUTE)
+       if(NOT IS_DIRECTORY ${include})
+         message(FATAL_ERROR "Project '@PROJECT_NAME@' specifies '${idir}' as an include dir, which is not found.  It does not exist in '${include}'.  Ask the maintainer '@PROJECT_MAINTAINER@' to fix it.")
+       endif()
++      _list_append_unique(@PROJECT_NAME@_INCLUDE_DIRS ${include})
+     else()
+-      message(FATAL_ERROR "Project '@PROJECT_NAME@' specifies '${idir}' as an include dir, which is not found.  It does neither exist as an absolute directory nor in '@PKG_INCLUDE_PREFIX@/${idir}'.  Ask the maintainer '@PROJECT_MAINTAINER@' to fix it.")
++      message(WARNING "Project '@PROJECT_NAME@' specifies '${idir}' as an include dir, which is not found.  It does neither exist as an absolute directory nor in '@PKG_INCLUDE_PREFIX@/${idir}'.  Ask the maintainer '@PROJECT_MAINTAINER@' to fix it.")
+     endif()
+-    _list_append_unique(@PROJECT_NAME@_INCLUDE_DIRS ${include})
+   endforeach()
+ endif()
+ 
+-- 
+2.7.4
+