When we building with gcc-4.3.x on a ppc host we get the following warnings:
dlmalloc.c: In function 'malloc_extend_top': dlmalloc.c:1971: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:1999: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2029: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2031: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2042: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c: In function 'malloc': dlmalloc.c:2245: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2245: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2253: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2258: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2263: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2318: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2327: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2329: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2344: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2356: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2360: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2362: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2363: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c: In function 'free': dlmalloc.c:2431: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2444: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2483: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2483: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c: In function 'realloc': dlmalloc.c:2594: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2599: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2604: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2605: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2637: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2646: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2647: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c: In function 'calloc': dlmalloc.c:2896: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2897: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c: In function 'malloc_trim': dlmalloc.c:2987: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:2997: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:3008: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:3012: warning: dereferencing type-punned pointer will break strict-aliasing rules dlmalloc.c:3021: warning: dereferencing type-punned pointer will break strict-aliasing rules This is due to pointer aliasing that the dlmalloc code does and depends on. Instead of trying trying to work around the warnings, we use the per file CFLAGs to disable the warnings via -fno-strict-aliasing. Signed-off-by: Kumar Gala <[EMAIL PROTECTED]> --- common/Makefile | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/common/Makefile b/common/Makefile index b425795..5f4959a 100644 --- a/common/Makefile +++ b/common/Makefile @@ -104,6 +104,7 @@ COBJS-y += console.o COBJS-y += cyclon2.o COBJS-y += stratixII.o COBJS-y += devices.o +CFLAGS_dlmalloc.o += -fno-strict-aliasing COBJS-y += dlmalloc.o COBJS-y += docecc.o COBJS-y += environment.o -- 1.5.5.1 ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
