C6000 CGTv6.1 -gcc option for Type attributes

I get a clean build when I use the 6.1.0 version of the C6000 compiler to compile this line ...

Kazu Kon said:

struct __attribute__((aligned(32))) myStruct { char c1; int i; char c2; };

Thus, I suspect I am missing some information.  Please preprocess the file usbdesc.c and submit it, along with the exact compiler options you use.

Thanks and regards,

-George

Hello George,

Thank you for your reply. The compiler options are below.

-mv6740 -g --gcc --define=c6748 --define=lcdkC6748 --define=DMA_MODE --include_path="C:/ti/C6000 Code Generation Tools 6.1.23/include" --include_path="../../../../../../../third_party/fatfs/src" --include_path="../../../../../../../include" --include_path="../../../../../../../include/hw" --include_path="../../../../../../../include/c674x" --include_path="../../../../../../../include/c674x/c6748" --include_path="../../../../../../../grlib/include" --include_path="../../../../../../../usblib/include" --include_path="../../../../../../../ipclite/include" --include_path="../../../../../../../nandlib/include" --diag_warning=225

Sorry, but I told you wrong information. The GNU compiler extention used is below. Could you get a clean build in this case?

struct __attribute__((__packed__)) packed_struct { char c1; int i; char c2; };

#define USBLIB_PACKED __attribute__ ((packed))

typedef struct
{
unsigned char bmRequestType;
unsigned char bRequest;
unsigned short wValue;
unsigned short wIndex;
unsigned short wLength;
}
USBLIB_PACKED tUSBRequest;

Regards,
Kazu

The packed structure support you need is introduced in compiler version 7.2.0.  Since you are looking at upgrading from an older version 6.1.0, I recommend you upgrade all the way to the latest long term version 7.4.11.  See this wiki page for the details.

Thanks and regards,

-George

Hello George,

Thank you for your kind reply. I think you'll recommed me to use ELF(EABI) in v7.4.11. But I'll possibly need to use COFF because I use DSP/BIOSv5 with my past firmware. I can compile this packed structure using COFF in v7.4.11. But there is a descritpion below. Do you think I can use COFF in v7.4.11 with packed structure?

C6000 Optimizing Compiler v7.4 UG (SPRU187U)
6.15.4 Type Attributes
In addition, the visibility type attribute is supported for EABI mode (--abi=eabi).

Regards,
Kazu