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Forum: ARM programming with GCC/GNU tools How to remove _impure_ptr & impure_data from .data section


Author: Jagan teki (402jagan)
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Hi,

I have a problem with _impure_ptr & impure_data reentrent stubs.
I am using arm-linux-eabi compiler for my .c files.

Even though I haven't use -DREENTRANT_SYSCALLS_PROVIDED on my CFLAGS, I 
was
able to see the _impure_ptr & impure_data on my object file.

Those two funcs[_impure_ptr & impure_data] takes too memory on my .data
section.

Could any one help me out how can i remove them from obj, so-that i can
achieve optimum size on my binary..

Regards,
Jagan.

Author: gjlayde (Guest)
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These objects com from the libraray and thus won't be affected by 
command line option.

If the library was built with -ffunction-sections, -fdata-sections or on 
object bases, then cyou can kick out the object in your linker script.

Read the map file to see where the objects live and if their place is 
unique, factor it out.

Author: Jagan teki (402jagan)
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Hi,

On my obj dump file I have funcs in .data sections like

000123e40 <_impure_ptr>:
 ...................
000123e48 <impure_data>:
 ...............

How can factor it out, can i use any CFLAG while compilation. or?

Regards,
Jagan

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