Changes between Version 10 and Version 11 of toolchain/install

Timestamp:

Feb 10, 2017, 3:48:41 PM (8 years ago)

Author:

Bayard Gildas

Comment:

--

toolchain/install

@@ -47 +47 @@
  * For an Intel graphic card, it's a little bit more complicated, due to several versions and path for the libraries.
 The idea is that we're using the system video card driver since it's not included in robomap3.
+
 The driver itself (eg: i965_dri.so) should be loaded automatically (from /usr/lib/x86_64-linux-gnu/dri/). But this driver may not succesfully load since it requires some specific library versions that may not match robomap3's.
-To debug this you should launch your 3D graphic program (eg: simulator) with the LIBGL_DEBUG env var set to verbose
+
+To debug this you should launch your 3D graphic program (eg: simulator) with the LIBGL_DEBUG environment variable set to verbose. 
 For example
 {{{
@@ -55 +57 @@
 Notice the line that look like {{{ libstdc++.so.6: version `CXXABI_1.3.9' not found (required by /usr/lib/x86_64-linux-gnu/dri/i965_dri.so) }}}
 This means that the local system driver needs a version of libstdc++.so.6 that defines the symbol CXXABI_1.3.9 (meaning application binary interface version 1.3.9).
-The version of libstdc++ included in robomap3 probably doesn't define this symbol. You can make sure with {{{ strings /.../robomap3/1.7.3/core2-64/sysroots/core2-64-poky-linux/usr/lib/libstdc++.so.6 | grep CXXABI_ }}}.
+The version of libstdc++ included in robomap3 probably doesn't define this symbol. You can make sure with 
+{{{
+strings /.../robomap3/1.7.3/core2-64/sysroots/core2-64-poky-linux/usr/lib/libstdc++.so.6 | grep CXXABI_ 
+}}}.
 So we need to preload the libstdc++ library of the system to avoid robomap3 one to be loaded. 
-To achieve this we need to set the LD_PRELOAD environment variable like this {{{ LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libstdc++.so.6 ./LineFollower_simulator_nrt ... }}}
+To achieve this we need to set the LD_PRELOAD environment variable like this
+{{{
+LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libstdc++.so.6 ./LineFollower_simulator_nrt ...
+}}}
+
 
 Stopping here may be enough, but you then can see errors like {{{ i965_dri.so: undefined symbol: nouveau_drm_new }}}.
+
 Same problem: the driver needs a version of a library (here libdrm_nouveau.so.2) which defines a specific symbol that doesn't exist in robomap3 version (yet).
+
 Same solution: preload the local system library.
 Repeat this until all unresolved symbols are gone.
+
 On ubuntu 16.10 with robomap3 1.7.3, I ended up with the following
 {{{
 LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libstdc++.so.6:/usr/lib/x86_64-linux-gnu/libdrm_intel.so.1:/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2:/usr/lib/x86_64-linux-gnu/libdrm_radeon.so.1  ./LineFollower_simulator_nrt -n x4_0 -t x4 ...
+}}}
+To avoid setting this variable every time, you can modify the script used to launch the program (usually in build/bin, eg: simulator_xx.sh) and add this line __after__ the first one
+{{{
+export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libstdc++.so.6:/usr/lib/x86_64-linux-gnu/libdrm_intel.so.1:/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2:/usr/lib/x86_64-linux-gnu/libdrm_radeon.so.1
 }}}