ARM Compiler 6编译错误：
[mw_shl_code=bash,true]/home/system2/BSP_QC8992/Dev_env/trustzone_images/core/securemsm/trustzone/qsee/include/tzbsp_syscall.h:37:9: error: '#pragma diag_suppress' is an ARM Compiler 5 extension, and is not supported by ARM Compiler 6 [-Werror,-Warmcc-pragma-diag]
#pragma diag_suppress 1295 /* Allow argument less function prototypes. */
^
/home/system2/BSP_QC8992/Dev_env/trustzone_images/core/securemsm/trustzone/armlib/v7/inc/tzbsp_mcrmrc.h:64:9: error: '#pragma push' is an ARM Compiler 5 extension, and is not supported by ARM Compiler 6 [-Warmcc-pragma-push-pop]
#pragma push
^
/home/system2/BSP_QC8992/Dev_env/trustzone_images/core/securemsm/trustzone/armlib/v7/inc/tzbsp_mcrmrc.h:65:9: error: '#pragma arm' is an ARM Compiler 5 extension, and is not supported by ARM Compiler 6 [-Warmcc-pragma-arm]
#pragma arm
^
/home/system2/BSP_QC8992/Dev_env/trustzone_images/core/securemsm/trustzone/armlib/v7/inc/tzbsp_mcrmrc.h:91:9: error: '#pragma pop' is an ARM Compiler 5 extension, and is not supported by ARM Compiler 6 [-Warmcc-pragma-push-pop]
#pragma pop
^
4 errors generated.
scons: *** [/home/system2/BSP_QC8992/Dev_env/trustzone_images/core/securemsm/trustzone/qsee/kernel/build/qsee/scorpion/BAWAANAA/src/tzbsp_dload_mode.o] Error 1[/mw_shl_code]
这个错误包含了"#pragma push"、"#pragma arm" 和 "#pragma pop" 等错误。
当前的程序指定用于ARM Compiler 5及其早起版本，默认情况下会被ARM Compiler 6.00忽略，包括
- ARM Compiler 6.00 （build 18）
- ARM Compiler 6.00 update1（build 21）
- ARM Compiler 6.00 update2（build 46）
为了帮助用户从ARM Compiler 5迁移到 ARM Compiler 5时，尽量识别潜在的重要问题，ARM Compiler 6.01 (build 22)后更改了一些行为。
ARM Compiler 6.01 迁移和兼容性指南请参考：http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0742b/chr1398871316050.html
这个页面描述如何使用“-Wno-error=<diag-group>”选项，从而降级错误为警告级别：
- -Wno-error=armcc-pragma-push-pop 解决错误：#pragma push、#pragma pop
- -Wno-error=armcc-pragma-arm 解决错误：#pragma arm
- -Wno-error=armcc-pragma-diag 解决错误：#pragma diag_suppress
例如：
[mw_shl_code=c,true]
#pragma push
#pragma arm
int fn(int x) {
return 2 * x;
}
#pragma pop[/mw_shl_code]
编译会出错：
[mw_shl_code=bash,true]$ armclang --target=aarch64-arm-none-eabi -c foo.c
foo.c:2:9: error: '#pragma push' is an ARM Compiler 5 extension, and is not
supported by ARM Compiler 6 [-Warmcc-pragma-push-pop]
#pragma push
^
foo.c:3:9: error: '#pragma arm' is an ARM Compiler 5 extension, and is not
supported by ARM Compiler 6 [-Warmcc-pragma-arm]
#pragma arm
^
foo.c:9:9: error: '#pragma pop' is an ARM Compiler 5 extension, and is not
supported by ARM Compiler 6 [-Warmcc-pragma-push-pop]
#pragma pop
^
3 errors generated.[/mw_shl_code]
加上编译选项后：
[mw_shl_code=bash,true]$ armclang --target=aarch64-arm-none-eabi -c foo.c -Wno-error=armcc-pragma-push-pop -Wno-error=armcc-pragma-arm
foo.c:2:9: warning: '#pragma push' is an ARM Compiler 5 extension, and is not
supported by ARM Compiler 6 [-Warmcc-pragma-push-pop]
#pragma push
^
foo.c:3:9: warning: '#pragma arm' is an ARM Compiler 5 extension, and is not
supported by ARM Compiler 6 [-Warmcc-pragma-arm]
#pragma arm
^
foo.c:9:9: warning: '#pragma pop' is an ARM Compiler 5 extension, and is not
supported by ARM Compiler 6 [-Warmcc-pragma-push-pop]
#pragma pop
^
3 warnings generated.[/mw_shl_code]
| 
