diff options
| author | Mathieu Poirier <mathieu.poirier@linaro.org> | 2018-01-30 14:37:34 -0700 |
|---|---|---|
| committer | Mike Leach <mike.leach@linaro.org> | 2018-01-31 12:04:46 +0000 |
| commit | cee5610ae4155dc0c25c4b1e31bc8dc1d9a87725 (patch) | |
| tree | 7d78cb700d7ab129cb1c7b47fdb5f419a11c1624 | |
| parent | 12aa605bcc0a24ab9cfef1cf01c8ad976262711b (diff) | |
HOWTO: Document alternate library build process
The perf tools build script has the capability to compile and link
against a different library than the (default) system's openCSD
library. This patch documents how to use two environment variable
to tell the build system where to get the library from.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
| -rw-r--r-- | HOWTO.md | 19 |
1 files changed, 19 insertions, 0 deletions
@@ -366,6 +366,25 @@ output as follows:- Set to any other value will remove the RAW_PACKED lines. +Working with a debug version of the openCSD library +--------------------------------------------------- +When compiling the perf tools it is possible to reference another version of +the openCSD library than the one installed on the system. This is useful when +working with multiple development trees or having the desire to keep system +libraries intact. Two environment variable are available to tell the perf tools +build script where to get the header file and libraries, namely CSINCLUDES and +CSLIBS: + + linaro@t430:~/linaro/linux-kernel$ export CSINCLUDES=~/linaro/coresight/my-opencsd/decoder/include/ + linaro@t430:~/linaro/linux-kernel$ export CSLIBS=~/linaro/coresight/my-opencsd/decoder/lib/linux64-rel/ + linaro@t430:~/linaro/linux-kernel$ make VF=1 -C tools/perf + +This will have the effect of compiling and linking against the provided library. +Since the system's openCSD library is in the loader's search patch the +LD_LIBRARY_PATH environment variable needs to be set. + + linaro@t430:~/linaro/linux-kernel$ export LD_LIBRARY_PATH=$CSLIBS + Trace Decoding with Perf Report ------------------------------- |