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ARM: 5776/1: Check compiler version and EABI support when adding ARM unwind support. 

ARM unwind is known to compile only with EABI and not-buggy compilers.
The problem is not the unwinding information but the -fno-frame-pointer
option added as a result of !CONFIG_FRAME_POINTER.  Now we check the
compiler and raise a #warning in case of wrong compiler.

Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Claudio Scordino 2009-10-30 12:06:05 +01:00 committed by Russell King
parent 426fcd2a35
commit 6603a4fd51
1 changed files with 9 additions and 0 deletions
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9
arch/arm/kernel/unwind.c
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@ -26,6 +26,15 @@
* http://infocenter.arm.com/help/topic/com.arm.doc.subset.swdev.abi/index.html
*/
#if !defined (__ARM_EABI__)
#warning Your compiler does not have EABI support.
#warning ARM unwind is known to compile only with EABI compilers.
#warning Change compiler or disable ARM_UNWIND option.
#elif (__GNUC__ == 4 && __GNUC_MINOR__ <= 2)
#warning Your compiler is too buggy; it is known to not compile ARM unwind support.
#warning Change compiler or disable ARM_UNWIND option.
#endif
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>