Code does not fit in ROM with mspgcc but fits with CCS compiler

Hi Folks,

My friend has Code Composer Studio (CCS) license. He compiled without debugging and no optimization. Code size (ROM) is only 35 KB. This is good for MSP430G2955 that has 56 KB of Flash.

I compiled the same code using mspgcc, I get the following (-g -Oo):

/usr/lib/gcc/msp430/4.6.3/../../../../msp430/bin/ld: lpwmn.elf section `.text' will not fit in region `rom'
/usr/lib/gcc/msp430/4.6.3/../../../../msp430/bin/ld: section .vectors loaded at [0000ffe0,0000ffff] overlaps section .text loaded at [00002100,0001078f]
/usr/lib/gcc/msp430/4.6.3/../../../../msp430/bin/ld: region `rom' overflowed by 2674 bytes
/usr/lib/gcc/msp430/4.6.3/libcrt0.a(_copy_data.o): In function `__do_copy_data':
/build/buildd/gcc-msp430-4.6.3~mspgcc-20120406/./gcc-4.6.3/gcc/config/msp430/crt0.S:195: relocation truncated to fit: R_MSP430_16_BYTE against symbol `__data_load_start' defined in *ABS* section in lpwmn.elf
/usr/lib/gcc/msp430/4.6.3/crt0ivtbl16.o: In function `__isr_14':
(.text+0x2): relocation truncated to fit: R_MSP430_16 against symbol `_unexpected_' defined in .text.crt0 section in /usr/lib/gcc/msp430/4.6.3/libcrt0.a(_unexpected_.o)
./4lpwmn/util/src/util.o: In function `UTIL_initTraceCntxt':
util.c:(.text+0x4f6): relocation truncated to fit: R_MSP430_16 against symbol `memset' defined in .text section in /usr/msp430/lib/libc.a(memset.o)
./4lpwmn/system/src/system.o: In function `SYS_init':
system.c:(.text+0x14): relocation truncated to fit: R_MSP430_16 against symbol `memset' defined in .text section in /usr/msp430/lib/libc.a(memset.o)
./4lpwmn/system/src/system.o: In function `SYS_loop':
system.c:(.text+0x614): relocation truncated to fit: R_MSP430_16 against symbol `PHY_PIB_init' defined in .text section in ./4lpwmn/802_15_4e/src/phy_pib.o
system.c:(.text+0x61c): relocation truncated to fit: R_MSP430_16 against symbol `ADP_init' defined in .text section in ./4lpwmn/adp/src/adp.o
system.c:(.text+0x716): relocation truncated to fit: R_MSP430_16 against symbol `ADP_evtHndlr' defined in .text section in ./4lpwmn/adp/src/adp.o
system.c:(.text+0x8ec): relocation truncated to fit: R_MSP430_16 against symbol `ADP_procPendingTrscns' defined in .text section in ./4lpwmn/adp/src/adp.o
system.c:(.text+0x974): relocation truncated to fit: R_MSP430_16 against symbol `ADP_evtHndlr' defined in .text section in ./4lpwmn/adp/src/adp.o
./4lpwmn/smac/src/s_mac_cc1101.o: In function `MAC_csmaAttemptTxOnCca':
s_mac_cc1101.c:(.text+0x704): relocation truncated to fit: R_MSP430_16 against symbol `CC1101_txToIdleTransitionTimeMilli' defined in .rodata section in ./4lpwmn/pltfrm/src/cc1101.o
./4lpwmn/smac/src/s_mac_cc1101.o: In function `MAC_getCsmaBackOff':
s_mac_cc1101.c:(.text+0x7f8): additional relocation overflows omitted from the output
collect2: ld returned 1 exit status
make: *** [lpwmn.elf] Error 1

If I remove -g option and optimize for size (-Os), then I can get it down to 32 KB. Problem is I can't do debugging in this case. Am I missing some trick or is CCS compiler doing something smart?

Regards,
Arvind

------------------------------------------------------------------------------
Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
from Actuate! Instantly Supercharge Your Business Reports and Dashboards
with Interactivity, Sharing, Native Excel Exports, App Integration & more
Get technology previously reserved for billion-dollar corporations, FREE
http://pubads.g.doubleclick.net/gampad/clk?id=190641631&iu=/4140/ostg.clktrk

_______________________________________________
Mspgcc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/mspgcc-users