31.71 Flutter Troubleshooting


call to undeclared function ‘waitpid’; ISO C99 and later do not support implicit function declarations.

This can occur after doing a cleanup and rebuilding from scratch. It seems that waitpid() has not been properly included. Edit the file linux/flutter/ephemeral/.plugin_symlinks/flutter_pty/src/flutter_pty_unix.c to add the following lines at line number 10.

#include <sys/types.h>
#include <sys/wait.h>

clang++ is not able to compile a simple test program

This can occur after an operating system upgrade like Ubuntu 23.10 to 24.04). The problem seems to be that clang is updated but the libstdc++ also needs an update:

wajig install libstdc++-14-dev
flutter clean

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