Nope. The builtins not only vary between gcc versions, but they also have a nasty tendency to generate calls to library functions, sometimeslibgcc functions. Hence -ffreestanding.-ffreestanding will still generate calls to libgcc functions. -ffreestanding doesn't disable _all_ of the C library, either.No, it doesn't, but it does inhibit builtin functions, and so provides abit more ABI stability.
Yes, Linux should definitely be compiled with -ffreestanding, it isn't a hosted application after all ;-) Segher - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Follow-Ups:
- References:
- x86 setup code rewrite in C
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 01/33] x86 setup: MAINTAINERS: formally take responsibility for the i386 boot code
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 02/33] hd.c: remove BIOS/CMOS queries
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 03/33] include/asm-i386/boot.h: This is <asm/boot.h>, not <linux/boot.h>
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 04/33] Unify the CPU features vectors between i386 and x86-64
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 05/33] Change CONFIG_X86_MINIMUM_CPU_MODEL to CONFIG_X86_MINIMUM_CPU_FAMILY
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 06/33] Clean up struct screen_info (<linux/screen_info.h>)
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 07/33] Use a new CPU feature word to cover all Intel features that are spread around
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 08/33] Define zero-page offset 0x1e4 as a scratch field, and use it
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 09/33] Make definitions for struct e820entry and struct e820map consistent
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 10/33] Make struct boot_params a real structure, and remove obsolete fields
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 11/33] x86-64: add CONFIG_PHYSICAL_ALIGN for consistency with i386
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 12/33] x86-64: add symbolic constants for the boot segment selectors
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 13/33] Header file to produce 16-bit code with gcc
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 14/33] Top header file for new x86 setup code
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 15/33] Simple bitops for the new x86 setup code.
- From: "H. Peter Anvin" <[email protected]>
- [x86 setup 16/33] String-handling functions for the new x86 setup code.
- From: "H. Peter Anvin" <[email protected]>
- Re: [x86 setup 16/33] String-handling functions for the new x86 setup code.
- From: Jan Engelhardt <[email protected]>
- Re: [x86 setup 16/33] String-handling functions for the new x86 setup code.
- From: "H. Peter Anvin" <[email protected]>
- Re: [x86 setup 16/33] String-handling functions for the new x86 setup code.
- From: Segher Boessenkool <[email protected]>
- Re: [x86 setup 16/33] String-handling functions for the new x86 setup code.
- From: "H. Peter Anvin" <[email protected]>
- x86 setup code rewrite in C
- Prev by Date: Re: x86 setup code rewrite in C
- Next by Date: Suspend MAINTAINERS update
- Previous by thread: Re: [x86 setup 16/33] String-handling functions for the new x86 setup code.
- Next by thread: Re: [x86 setup 16/33] String-handling functions for the new x86 setup code.
- Index(es):
 |