AN3350 datasheet(157/185 Pages) STMICROELECTRONICS

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AN3350

Pragmas for preprocessing

Doc ID 018512 Rev 2

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Pragmas for preprocessing

20.1

check_header_flags

Controls whether or not to ensure that a precompiled header’s data matches a project’s

target settings.

Syntax

#pragma check_header_flags on | off | reset

Remarks

This pragma affects precompiled headers only.

If you enable this pragma, the compiler verifies that the precompiled header’s preferences

for double size, int size, and floating point math correspond to the build target’s settings.

If they do not match, the compiler generates an error message.

If your precompiled header file depends on these settings, enable this pragma. Otherwise,

disable it.

By default, this pragma is off.

20.2

faster_pch_gen

Controls the performance of precompiled header generation.

Syntax

#pragma faster_pch_gen on | off | reset

Remarks

If you enable this pragma, generating a precompiled header can be much faster, depending

on the header structure. However, the precompiled file can also be slightly larger.

This pragma does not correspond to any panel setting. By default, this setting is off.

20.3

flat_include

Controls whether or not to ignore relative path names in #include directives.

Syntax

#pragma flat_include on | off | reset

Remarks

For example, when on, the compiler converts this directive

#include <sys/stat.h>

#include <stat.h>

AN3350 Datasheet(PDF) 157 Page - STMicroelectronics