On Wed, 15 Jun 2022 at 21:24, Fiodar <fedor_qd@xxxxxxx> wrote: > > > > I tried GCC 3.4.3 shipped with Symbian SDK. Result same. > > I googled for «__INTPTR_TYPE__» and found — https://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html > Сitation : > «Some of these macros may not be defined on particular systems if GCC does not provide a stdint.h header on those systems.» > I look for «INTPTR_TYPE» in gcc sources and found headers named {target}-stdint.h > We are talking about these files, right? You need Symbian's <stdint.h> The gcc xxx-stdint.h file is only used if you compile with -ffreestanding so the OS <stdint.h> isn't used.