retrace: Implement glxCopySubBufferMESA

[apitrace] / BUGS.markdown

diff --git a/BUGS.markdown b/BUGS.markdown
index 56049c1de24557e3901bc0c8b023509f3c9ef6be..d8258a7be883deae8069dda6e2fbc7da8a699a37 100644 (file)
--- a/BUGS.markdown
+++ b/BUGS.markdown
@@ -176,7 +176,8 @@ Linux/MacOSX
 ------------
 
 Please rebuild apitrace with debugging information, by passing
-`-DCMAKE_BUILD_TYPE=Debug` to cmake.
+`-DCMAKE_BUILD_TYPE=Debug` to cmake, or editing its value in `CMakeCache.txt`
+and rebuilding.
 
 To obtain a stack back-trace, run the application with gdb from a terminal:
 
@@ -185,6 +186,10 @@ To obtain a stack back-trace, run the application with gdb from a terminal:
     ...
     (gdb) bt
 
+On Linux, to trace an application inside gdb the `LD_PRELOAD` environment
+variable should be set from within gdb like:
+
+    gdb --ex 'set exec-wrapper env LD_PRELOAD=/path/to/glxtrace.so' --args application arg1 ...
 
 See also more detailed and Distro specific instructions: