From: Martin Str|mberg Subject: Re: Alignment problem in GCC 2.95.2 Newsgroups: comp.os.msdos.djgpp References: User-Agent: tin/1.4.4-20000803 ("Vet for the Insane") (UNIX) (NetBSD/1.5_BETA (alpha)) Message-ID: <1030288855.880883@queeg.ludd.luth.se> Cache-Post-Path: queeg.ludd.luth.se!unknown AT speedy DOT ludd DOT luth DOT se X-Cache: nntpcache 2.4.0b5 (see http://www.nntpcache.org/) Date: 25 Aug 2002 15:20:55 GMT Lines: 38 NNTP-Posting-Date: 25 Aug 2002 15:20:55 GMT NNTP-Posting-Host: queeg.ludd.luth.se X-Trace: 1030288855 news.luth.se 441 130.240.16.109 To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Kernel Panic wrote: : I'm using GCC 2.95.2 (DJGPP) and having a problem with alignment.. Compiling : the following line: : kernel_info_page_t kernel_info_page __attribute__((aligned(PAGE_SIZE))) : (it's beginning of a structure) I get a message like: : global.c:31: warning: alignment of `struct kernel_info_page_t : kernel_info_page' is greater than maximum object file alignment. Using 4. : I haven't found any other way to set the alignment than with ugly assembler : macros. Can I see those macros? I'm interested myself in such aligning. > This compiled correctly on FreeBSD (with the same GCC version! : Though I don't understand how it's possible..).. FreeBSD is perhaps using something other than COFF? : Any suggestions?.. BTW, how does GCC know what file format it's actually I wrote my own linker script that aligns the .bss section to 4096 and make sure my structures that need this alignment comes first. On the other hand I also have some more structures that need this alignment and their number isn't known until the program is running. So I need to align the end of .bss too. Thus perhaps I should just ditch my first alignment and put everything at the end. : going to be?.. Compiled in default, perhaps. Right, MartinS