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sample program that demonstrates how to compare the value of __CC65__ for

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any version of the compiler
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mrdudz
2022-05-10 01:16:19 +02:00
parent 1b73ffb8ae
commit 8062f8d029
2 changed files with 59 additions and 0 deletions
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samples/checkversion.c Normal file
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/* Until 2.19 the __CC65__ macro was defined as (VER_MAJOR * 0x100) + (VER_MINOR * 0x10),
* which caused it to contain broken values in compiler releases 2.16 to 2.19. The
* macro was fixed some time after 2.19 to (VER_MAJOR * 0x100) + VER_MINOR.
*
* The following strategy can be used to still compare for less or greater versions,
* should this really be necessary or wanted - it is not recommended afterall.
*/
#include <stdio.h>
#include <stdlib.h>
#if ((__CC65__ & 0xff00) > 3) || ((__CC65__ & 0x000f) > 0)
/* compiler version is 2.19-git or higher */
# define VER_MAJOR ((__CC65__ >> 8) & 0xff)
# define VER_MINOR (__CC65__ & 0xff)
#elif ((__CC65__ & 0xff00) == 3)
/* broken values in version 2.16 - 2.19-git before the bug was fixed */
# define VER_MAJOR 2
# define VER_MINOR (((__CC65__ >> 4) & 0x0f) + 16)
#else
/* values before 2.16 */
# define VER_MAJOR ((__CC65__ >> 8) & 0xff)
# define VER_MINOR ((__CC65__ >> 4) & 0x0f)
#endif
/* define a new value that will work for comparing all versions */
#define VERSION ((VER_MAJOR << 8) + VER_MINOR)
int main(void)
{
printf("__CC65__ defined as %04x\n", __CC65__);
printf("compiler version is %u.%u\n", VER_MAJOR, VER_MINOR);
if (__CC65__ == VERSION) {
printf("__CC65__ is defined correctly as (VER_MAJOR * 0x100) + VER_MINOR\n");
return EXIT_SUCCESS;
}
printf("__CC65__ is incorrectly defined as (VER_MAJOR * 0x100) + (VER_MINOR * 0x10)\n");
return EXIT_FAILURE;
}