Sets if checking should be done to ensure that a precompiled header's data matches a project's target settings.

This pragma is compatible with the following platform targets:

68K

PowerPC

NEC V800

Intel x86

MIPS

Embedded 68K

This pragma affects precompiled headers only.

When this pragma is on, the compiler makes sure that the precompiled header's preferences for double size (8-byte or 12-byte), int size (2-byte or 4-byte) and floating point math correspond to the build target's settings. If they do not match, the compiler generates an error.

If your precompiled header file has settings that are independent from those in the project, turn this pragma off. If your precompiled header depends on these settings, turn this pragma on.

This pragma does not correspond to any option in the C/C++ Language Panel. To check whether this option is on, use __option (check_header_flags), described in "Checking Options." By default, this pragma is off.