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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
```