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8

Using the Serial object pulls HardwareSerial0.o into your program linkage. This file defines, among other things, the ISRs (interrupt service routines) associated with the serial port. ISRs are defined using the ISR() macro from the acr-libc. This macro creates a function prototype and assigns some attributes to the function, including the used attribute ...


7

First of all: The Arduino IDE brings its own GCC compiler. It is a version, that can compile for the AVR platform (don't know, if the standard version is capable of that). When you activate verbose output for compilation in the preferences of your Arduino IDE, you can actually see, what calls to GCC the IDE is doing. You could use that to replicate it. If ...


4

The double data type is almost universally 8-bytes long, so you could simply #if !__AVR__ # define HAS_64_BIT_DOUBLE #endif Gcc provides a more specific macro though: __SIZEOF_DOUBLE__, which has the same value as sizeof(double). But I do not know whether it is provided by other compilers.


3

Finally find the solution =) You don't have to change the ID vendor or ID product: it is possible to attribute a permanent name with devpath (where the device is plugged) The only downside of using the devpath is that the devices will always have to stay plugged into the same physical port. Answer here:PersistentUSBDevices / Alternative filtering via Devpath


2

This is not an answer that fully meets what you ask, but it is too big for a comment, and it helps you somewhat, at least using your Sublime editor. What annoys me most in the Arduino IDE is the lack of supporting multiple files (having horizontal tabs make the number of files to see max 6 or 7, and using .h/.cpp files easily goes most beyond that number). ...


2

Sketch uses 444 bytes (1%) of program storage space. Maximum is 32256 bytes. Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes. This is not an error message. Rather, it's a message that results from a successful compile of your empty programme. Sketch uses 998 bytes (3%) of program storage ...


1

There is nothing to do. What you are seeing is not an error. It is merely an informational message telling you how much of the available resources your sketch is using. Since it is using far less than the maximum available (as you would expect from an empty sketch) you have no problem. You only need to worry about those figures when the "amount left&...


1

Yes. Arduino compilation is set up with link-time optimization (LTO), and the assembly files created during C compilation don't contain any assembly code - just the intermediate representation used later in the LTO stage to generate actual assembly code. We want the latter. It so happens, rather nicely, that the very last time assembler is invoked in the ...


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