"FILE" identifier undefined in C - MacOS 12

[Gabriel (gbartuccio)]

Hi, I wanted to use the FILE structure which is included in stdio.h, but the "FILE* fp" doesn't get recognized, saying that the "FILE identifier is undefined". Im running VSCode on MacOS 12.2.1 M1, gcc installed via Homebrew.

#include <stdio.h>
#include <stdlib.h>
main(){
char c;
FILE* fp = fopen("prova.txt","w");
if (fp==NULL) exit(1);
else {
while ((c=getchar())!=EOF)
fputc(c,fp);
fclose(fp);
}
}

[Sean McManus (sean-mcmanus)]

Can you run C/C++: Log Diagnostics and check if the compilerPath and system includes are as expected?

[Michelle Matias (michelleangela)]

Could you also run gcc --version from the terminal to see how the gxx-include-dir is configured the gcc compiler?

[Gabriel (gbartuccio)]

Can you run C/C++: Log Diagnostics and check if the compilerPath and system includes are as expected?

how do I do that?

[Michelle Matias (michelleangela)]

Type the command C/C++: Log Diagnostics in the VS Code command palette and press enter to run the command.

[Gabriel (gbartuccio)]

That's the output:

-------- Diagnostics - 2/16/2022, 7:50:49 PM
Version: 1.8.4
Current Configuration:
{
"name": "Mac",
"includePath": [
"${workspaceFolder}/**",
"/opt/homebrew/Cellar/gcc/11.2.0_1/include/c++/11.1.0",
"/opt/homebrew/Cellar/gcc/11.2.0_1/include/c++/11.1.0/tr1",
"/opt/homebrew/Cellar/gcc/11.2.0_1/include/c++/11.1.0/aarch64-apple-darwin20"
],
"defines": [],
"macFrameworkPath": [],
"compilerPath": "/opt/homebrew/bin/gcc",
"cStandard": "gnu17",
"cppStandard": "gnu++17",
"intelliSenseMode": "macos-gcc-arm64",
"compilerPathIsExplicit": true,
"cStandardIsExplicit": true,
"cppStandardIsExplicit": true,
"intelliSenseModeIsExplicit": true
}
Translation Unit Mappings:
[ /Users/gb/Documents/program.c ]:
/Users/gb/Documents/program.c
Translation Unit Configurations:
[ /Users/gb/Documents/program.c ]:
Process ID: 4917
Memory Usage: 0 MB
Compiler Path: /opt/homebrew/bin/gcc
Includes:
/opt/homebrew/Cellar/gcc/11.2.0_1/include/c++/11.1.0
/opt/homebrew/Cellar/gcc/11.2.0_1/include/c++/11.1.0/tr1
/opt/homebrew/Cellar/gcc/11.2.0_1/include/c++/11.1.0/aarch64-apple-darwin20
/opt/homebrew/Cellar/gcc/11.2.0_1/lib/gcc/11/gcc/aarch64-apple-darwin20/11.1.0/include
/opt/homebrew/Cellar/gcc/11.2.0_1/lib/gcc/11/gcc/aarch64-apple-darwin20/11.1.0/include-fixed
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/System/Library/Frameworks
Standard Version: c17
IntelliSense Mode: macos-gcc-arm64
Other Flags:
--gcc
--gnu_version=110100
Total Memory Usage: 0 MB

------- Workspace parsing diagnostics -------
Number of files discovered (not excluded): 8705
Number of files parsed: 1058

[Michelle Matias (michelleangela)]

Gabriel (@gbartuccio)
The log diagnostic shows the memory usage of the IntelliSense is 0 MB, which indicates that it probably crashed.

Could you also get logs of the language server by following the instructions at https://code.visualstudio.com/docs/cpp/enable-logging-cpp#_enable-logging-for-the-language-server? These logs may show if IntelliSense is crashing or when it fails to work.

[Gabriel (gbartuccio)]

I quickly fixed by just updating gcc via terminal, I guess something just went wrong during the update from MacOS 11 to 12.