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C and C++ Compilers

Position independence qualifiers

/noropi

This option generates code that is not (read-only) position-independent.

This is the default.

/nopic

is an alias for this option.

/ropi

This option generates (read-only) position-independent code.

/pic

is an

alias for this option. If this option is selected the compiler:

• addresses read-only code and data pc-relative

• sets the Position Independent (PI) attribute on read-only output

sections.

Note

The ARM tools cannot determine if the final output image will be

Read-Only Position Independent (ROPI) until the linker finishes

processing input sections. This means that the linker might emit ROPI

error messages, even though you have selected this option.

/norwpi

This option generates code that does not address read/write data

position-independently. This is the default.

/nopid

is an alias for this

option.

/rwpi

This option generates code that addresses read/write data

position-independently (Read-Write Position Independent).

/pid

, for

position-independent data, is an alias for this option. If you select this

option, the compiler:

• Addresses writable data using offsets from the static base register

sb. This means that:

— data address can be fixed at runtime

— data can be multiply instanced

— data can be, but does not have to be, position-independent.

• Sets the PI attribute on read/write output sections.

Note

The compiler does not force your read/write data to be

position-independent. This means that the linker might emit RWPI

warning messages, even though you have selected this option.

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ARM VERSION 1.2 Scheda Tecnica Pagina 31