PureBasic Forums - English

Posted: **Sat Feb 15, 2025 7:33 pm**

Hello,

why do get I this error on an ARM Mac?
"error: call to undeclared function 'read'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]"
On an Intel Mac the same code works.

Code: Select all

! read(serialPort, p_buffer, 4);

Posted: **Sat Feb 15, 2025 8:26 pm**

You need to declare it with clang (or include the .h)

Posted: **Sun Feb 16, 2025 3:50 pm**

If I include it like this I get an error "clang: warning: treating 'c-header' input as 'c++-header' when in C++ mode, this behavior is deprecated [-Wdeprecated]
clang: error: cannot specify -o when generating multiple output files"

Code: Select all

ImportC "unistd.h"
  read_(fd, p_buf, size)
EndImport

Posted: **Sun Feb 16, 2025 5:17 pm**

I haven't tried this, but what if you do it with inline c?
like:

Code: Select all

! #include <unistd.h>

Posted: **Sun Feb 16, 2025 6:01 pm**

You can try

Code: Select all

ImportC ""
  read_(fd, p_buf, size)
EndImport

Posted: **Mon Feb 17, 2025 5:43 pm**

This example works

Code: Select all

ImportC ""
    _read_(port, *read_buf, size) 
EndImport
  
  read_(port, *read_buf, size)

But how can use the C code to include th .h file?
This example does not work on my ARM Mac and why does the C function red() works without including on my Intel Mac ?

Code: Select all

! #include <unistd.h>
! read(v_serialport, p_buffer, 4);

Posted: **Mon Feb 17, 2025 7:17 pm**

Fred wrote: Sun Feb 16, 2025 6:01 pm You can try
Code: Select all
ImportC ""
  read_(fd, p_buf, size)
EndImport

What does the empty string after ImportC imply or mean?

Posted: **Mon Feb 17, 2025 7:24 pm**

ricardo_sdl wrote: Mon Feb 17, 2025 7:17 pm
Fred wrote: Sun Feb 16, 2025 6:01 pm You can try
Code: Select all
ImportC ""
  read_(fd, p_buf, size)
EndImport
What does the empty string after ImportC imply or mean?

It means you're importing a function from a library PB has already imported, just the function itself hasn't been imported.

PureBasic Forums - English

Error read() on macOS arm64

Error read() on macOS arm64

Re: Error read() on macOS arm64

Re: Error read() on macOS arm64

Re: Error read() on macOS arm64

Re: Error read() on macOS arm64

Re: Error read() on macOS arm64

Re: Error read() on macOS arm64

Re: Error read() on macOS arm64