printf compile "expects argument of type 'int'" warnings on IDF_VER 5.1
Rob58329 opened this issue · comments
Board
Any ESP32 board
Device Description
Board only
Hardware Configuration
Board only
Version
latest master (checkout manually)
IDE Name
Arduno IDE v1.8.19
Operating System
Windows 10
Flash frequency
n/a
PSRAM enabled
no
Upload speed
n/a
Description
The latest "github.com/espressif/arduino-esp32" software (IDF_VER=v5.1) seems to have a NEW "printf" function, which gives compile warning (using Compiler Warnings=more) of:
"New: format '%i' expects argument of type 'int' (aka int16_t), but argument has type 'int32_t' {aka 'long int'}"
(This warning did not appear on IDF_VER=v4.x)
However I note that it does actually still take "int32_t" numbers.
On ESP32 an "int" is currently the same as "long int" which is "int32_t", so this change in the "printf" warnings does not seem to make sence for the ESP32.
(In general terms I would not be a fan of the re-definition of "int" [so it just becomes the equivalent of int16_t on all architectures] as for architecture-portability this would then necessitate the use of "int_fast16_t" instead of the simpler "int").
Sketch
void setup() {
Serial.begin(115200); delay(3000);
int32_t x=-1000000;
Serial.printf("x=%i\n",x);
}
void loop() {}Debug Message
only compiler warnings
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide
- I confirm I have checked existing issues, online documentation and Troubleshooting guide.
Hi @Rob58329 . Change comes from ESP-IDF and since we are just consumers of it, there is not much we can do. You can file an issue in the ESP-IDF tracker, if you want to get more info on why that happened and how to properly manage it.
Change comes from ESP-IDF... there is not much we can do.
Many thanks for this info - a pity but I suppose makes life "more interesting"...
[Closing issue.]