- 1 year ago
What's the proper way to tell MinGW based gcc to use ANSI stdio output (on Windows)?
To tell the MinGW-based GCC compiler to use ANSI stdio output on Windows, you can use the -D
option to define the _CRT_STDIO_ISO_WIDE_SPECIFIERS
preprocessor macro. This macro instructs the compiler to use the ISO standard behavior for printf-style format specifiers.
Here's an example command to compile a C program with ANSI stdio output using MinGW:
bashgcc -D _CRT_STDIO_ISO_WIDE_SPECIFIERS -o output.exe input.c
In the above command:
gcc
invokes the MinGW-based GCC compiler.-D _CRT_STDIO_ISO_WIDE_SPECIFIERS
defines the_CRT_STDIO_ISO_WIDE_SPECIFIERS
macro, instructing the compiler to use the ISO standard behavior for stdio functions.-o output.exe
specifies the output file name (output.exe
in this example).input.c
is the source file name (replace with your actual source file).
By defining _CRT_STDIO_ISO_WIDE_SPECIFIERS
, you ensure that the printf-style format specifiers conform to the ANSI standard, allowing consistent behavior across different platforms, including Windows.
Note that this option affects only the behavior of the MinGW-based GCC compiler during compilation. The resulting program will still be subject to the standard behavior of the C library implementation on the target system.