[U-Boot-Users] HELP, trying to remove complier warnings

[Howard, Marc]

Kumar,

Try adding -fno-strict-aliasing

Marc Howard 

> -----Original Message-----
> From: u-boot-users-bounces at lists.sourceforge.net 
> [mailto:u-boot-users-bounces at lists.sourceforge.net] On Behalf 
> Of Kumar Gala
> Sent: Thursday, July 10, 2008 9:59 AM
> To: u-boot-users at lists.sourceforge.net Users
> Subject: [U-Boot-Users] HELP, trying to remove complier warnings
> 
> I'm running with gcc-4.3 from fedora 9.  I get the following warnings:
> 
> dlmalloc.c: In function 'malloc_extend_top':
> dlmalloc.c:1971: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:1999: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2029: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2031: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2042: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c: In function 'malloc':
> dlmalloc.c:2245: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2245: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2253: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2258: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2263: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2318: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2327: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2329: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2344: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2356: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2360: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2362: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2363: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c: In function 'free':
> dlmalloc.c:2431: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2444: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2483: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2483: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c: In function 'realloc':
> dlmalloc.c:2594: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2599: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2604: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2605: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2637: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2646: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2647: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c: In function 'calloc':
> dlmalloc.c:2896: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2897: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c: In function 'malloc_trim':
> dlmalloc.c:2987: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:2997: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:3008: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:3012: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> dlmalloc.c:3021: error: dereferencing type-punned pointer will break  
> strict-aliasing rules
> 
> They all result from the bin_at macro in the file.  I can't 
> seem to do  
> anything to the code to get rid of them.
> 
> I see these both on x86 or ppc host builds:
> 
> x86:
> 
> gcc -g  -Os -m32    -D__KERNEL__ -DTEXT_BASE=0x387c0000 
> -I/local/home/ 
> galak/u-boot/include -fno-builtin -ffreestanding -nostdinc -isystem / 
> usr/lib/gcc/x86_64-redhat-linux/4.3.0/include -pipe  -DCONFIG_I386 - 
> D__I386__ -march=i386 -Werror -Wall -Wstrict-prototypes -fno-stack- 
> protector -c -o dlmalloc.o dlmalloc.c
> 
> ppc:
> 
> gcc -g  -Os   -fPIC -ffixed-r14 -meabi -D__KERNEL__ - 
> DTEXT_BASE=0xeff80000 
> -I/local/home/galak/git/u-boot-85xx/include -fno- 
> builtin -ffreestanding -nostdinc -isystem /usr/lib/gcc/ppc64-redhat- 
> linux/4.3.0/include -pipe  -DCONFIG_PPC -D__powerpc__ 
> -DCONFIG_MPC85xx  
> -DCONFIG_E500 -ffixed-r2 -Wa,-me500 -msoft-float -mno-string 
> -mno-spe - 
> DCONFIG_E500=1 -DCONFIG_MPC85xx=1 -DCONFIG_PPC_P4080=1 -Wall 
> -Wstrict- 
> prototypes -fno-stack-protector  -c -o dlmalloc.o dlmalloc.c
> 
> - k	
> 
> --------------------------------------------------------------
> -----------
> Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW!
> Studies have shown that voting for your favorite open source project,
> along with a healthy diet, reduces your potential for chronic lameness
> and boredom. Vote Now at http://www.sourceforge.net/community/cca08
> _______________________________________________
> U-Boot-Users mailing list
> U-Boot-Users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/u-boot-users
>