Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Add CMakeLists.txt for Mbed CLI v2 #35

Open
wants to merge 3 commits into
base: master
Choose a base branch
from
Open

Add CMakeLists.txt for Mbed CLI v2 #35

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
543b3bf
Add CMakeLists.txt for Mbed CLI v2
Oxore Apr 18, 2021
0758348
Add license header
Oxore May 18, 2021
8fdf484
Declare dependencies explicitly
Oxore May 18, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
47 changes: 47 additions & 0 deletions CMakeLists.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,47 @@
# Copyright (c) 2021 ARM Limited. All rights reserved.
# SPDX-License-Identifier: Apache-2.0

add_library(mbed-mqtt INTERFACE)
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please add a license header

Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Does this need to be an interface? I suspect STATIC would work for this library (no weak linking symbols) ?

Copy link
Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Would this license header be sufficient? No names, just copyright, and SPDX identifier.

# Copyright (c) 2021 ARM Limited. All rights reserved.
# SPDX-License-Identifier: Apache-2.0

Copy link
Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Does this need to be an interface? I suspect STATIC would work for this library (no weak linking symbols) ?

I think you are right. Give me a couple more days and I will figure it out how to make it compile being STATIC. I'm not really competent neither with cmake nor with mbed-os' CMakeLists.txt files organization.

Copy link
Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I've changed my mind. Here is the reason why I think this library should be declared as INTERFACE:

  1. When it is declared as STATIC, it anyways turns out to be built alongside with mbed-os in any project. Therefore it uses all the same macros passed to the compiler on invocation. Consider an example when I have mbedtls-config-changes.h file in the root of my project and I pass it as "MBEDTLS_USER_CONFIG_FILE=\"mbedtls-config-changes.h\"" in mbed_app.json. This MBEDTLS_USER_CONFIG_FILE macro is passed to mbed-mqtt sources too when it is being built and this config header file cannot be found, because mbed-mqtt is being built separately as a static library and it is not aware of my project's root directory where the file is located. To mitigate this error I have to declare something like this in my project's root CMakeLists.txt: target_include_directories(mbed-mqtt PRIVATE .). When mbed-mqtt declared as INTERFACE there is no such problems.

  2. When it is declared as STATIC, all mbed-mqtt dependencies are built separately from the project and number of files to be compiled becomes almost twice as many than if it was declared as INTERFACE - 868 files when INTERFACE vs 1717 when STATIC in my case. Basically the whole OS is being built twice. This is inconvenient.

  3. I have no evidence of any library for mbed-os declared as STATIC - they all are declared as INTERFACE. Why mbed-mqtt should not be declared as INTERFACE?


target_include_directories(mbed-mqtt
INTERFACE
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/
./paho_mqtt-sn_embedded_c/MQTTSNClient/src/
./paho_mqtt_embedded_c/MQTTPacket/src/
./paho_mqtt_embedded_c/MQTTClient/src/
./paho_mqtt_embedded_c/MQTTClient/src/mbed/
./src/
)

target_sources(mbed-mqtt
INTERFACE
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNSerializePublish.c
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNSubscribeServer.c
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNUnsubscribeServer.c
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNPacket.c
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNConnectServer.c
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNSearchClient.c
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNUnsubscribeClient.c
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNSubscribeClient.c
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNSearchServer.c
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNConnectClient.c
./paho_mqtt-sn_embedded_c/MQTTSNPacket/src/MQTTSNDeserializePublish.c
./paho_mqtt_embedded_c/MQTTPacket/src/MQTTSerializePublish.c
./paho_mqtt_embedded_c/MQTTPacket/src/MQTTConnectServer.c
./paho_mqtt_embedded_c/MQTTPacket/src/MQTTConnectClient.c
./paho_mqtt_embedded_c/MQTTPacket/src/MQTTDeserializePublish.c
./paho_mqtt_embedded_c/MQTTPacket/src/MQTTUnsubscribeServer.c
./paho_mqtt_embedded_c/MQTTPacket/src/MQTTPacket.c
./paho_mqtt_embedded_c/MQTTPacket/src/MQTTUnsubscribeClient.c
./paho_mqtt_embedded_c/MQTTPacket/src/MQTTSubscribeClient.c
./paho_mqtt_embedded_c/MQTTPacket/src/MQTTSubscribeServer.c
./paho_mqtt_embedded_c/MQTTPacket/src/MQTTFormat.c
./src/MQTTClientMbedOs.cpp
)

target_link_libraries(mbed-mqtt
INTERFACE
mbed-os
mbed-netsocket
mbed-greentea
)
15 changes: 15 additions & 0 deletions README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,21 @@ See [mbed_lib.json](mbed_lib.json) for all configurable options.

See [test README](TESTS/mqtt/README.md) to find out about tests-specific configuration configuration.

### Building with CLI V2

Assuming you have this repository cloned or somehow available at the `<your-project-root>/mbed-mqtt` directory.

Add to your project's `CMakeLists.txt` file the following lines:

```
add_subdirectory(mbed-mqtt)

target_link_libraries(${APP_TARGET}
mbed-mqtt
)

```

### API and usage

Mbed-os uses [Eclipse paho project emmbedded c implementation of MQTT protocol](https://github.com/eclipse/paho.mqtt.embedded-c) and [MQTT-SN protocol](https://github.com/eclipse/paho.mqtt-sn.embedded-c/).
Expand Down