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# Configuration
`xds-gdb` configuration is defined by variables (see listed below).
These variables may be set using :
- environment variables (inherited),
- or a config file set with `XDS_CONFIG` environment variable, for example:
`XDS_CONFIG=/tmp/my_xds_gdb_config.env xds-gdb`
- or by setting variables within a gdb ini file (see details below),
- or a "user" config file located in following directory (first found is taken):
1. $(CURRENT_DIRECTORY)/.xds-gdb.env
1. $(CURRENT_DIRECTORY)/../xds-gdb.env
1. $(CURRENT_DIRECTORY)/target/xds-gdb.env
1. $(HOME)/.config/xds/xds-gdb.env
## Configuration Variables
`XDS_CONFIG` Config file defining `XDS_xxx` configuration variables.
Variables of this file will overwrite inherited environment variables.
Variables definition may be prefixed or not by "export" keyword.
Here is an example of configuration file:
```bash
# for example:
# MY_PROJECT_DIR=/home/seb/xds-workspace/helloworld-native-application
cat > $MY_PROJECT_DIR/xds-gen3.conf << EOF
export XDS_AGENT_URL=localhost:8800
export XDS_PROJECT_ID=4021617e-ced0-11e7-acd2-3c970e49ad9b
export XDS_SDK_ID=c226821b-b5c0-386d-94fe-19f807946d03
EOF
```
`XDS_LOGLEVEL`
Set logging level (supported levels: panic, fatal, error, warn, info, debug)
`XDS_LOGFILE`
Set logging file, default `/tmp/xds-gdb.log`.
`XDS_NATIVE_GDB`
Use native gdb mode instead of remote XDS mode.
`XDS_PROJECT_ID` *(mandatory in XDS mode)*
Project ID you want to build
`XDS_RPATH`
Relative path into project
`XDS_SDK_ID` *(mandatory in XDS mode)*
Cross Sdk ID to use to build project
`XDS_AGENT_URL`
Local XDS agent url (default `http://localhost:8800`)
## Configuration variables set within gdb init command file
Above `XDS_xxx` variables may also be defined within gdb init command file
(see --command or -x option of genuine Gdb).
You must respect the following syntax: commented line including `:XDS-ENV:` tag
Example of gdb init file where we define project and sdk ID:
```bash
# :XDS-ENV: XDS_PROJECT_ID=4021617e-ced0-11e7-acd2-3c970e49ad9b
# :XDS-ENV: XDS_SDK_ID=c226821b-b5c0-386d-94fe-19f807946d03
```
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