2.4.4-pre6 does not compile

        Hi,

2.4.4-pre6 actually is the 4th 2.4.4pre-Patch that does not compile without further patching on my system. :-(

ld -m elf_i386 -T /usr/src/linux-2.4.4-pre6/arch/i386/vmlinux.lds -e stext arch/i386/kernel/head.o arch/i386/kernel/init_task.o init/main.o init/version.o \
        --start-group \
        arch/i386/kernel/kernel.o arch/i386/mm/mm.o kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o \
        drivers/block/block.o drivers/char/char.o drivers/misc/misc.o drivers/net/net.o drivers/media/media.o  drivers/ide/idedriver.o drivers/scsi/scsidrv.o drivers/scsi/aic7xxx/aic7xxx_drv.o drivers/cdrom/driver.o drivers/pci/driver.o drivers/video/video.o \
        net/network.o \
        /usr/src/linux-2.4.4-pre6/arch/i386/lib/lib.a /usr/src/linux-2.4.4-pre6/lib/lib.a /usr/src/linux-2.4.4-pre6/arch/i386/lib/lib.a \
        --end-group \
        -o vmlinux

/usr/src/linux-2.4.4-pre6/lib/lib.a(rwsem.o): In function `__rwsem_do_wake':
rwsem.o(.text+0x30): undefined reference to __builtin_expect' rwsem.o(.text+0x73): undefined reference to __builtin_expect'
make: *** [vmlinux] Error 1

Output from grep -v ^$ .config | grep -v ^#:

CONFIG_X86=y
CONFIG_ISA=y
CONFIG_UID16=y
CONFIG_EXPERIMENTAL=y
CONFIG_MODULES=y
CONFIG_MK6=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_CMPXCHG=y
CONFIG_X86_XADD=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_X86_L1_CACHE_SHIFT=5
CONFIG_X86_ALIGNMENT_16=y
CONFIG_X86_TSC=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
CONFIG_NOHIGHMEM=y
CONFIG_MTRR=y
CONFIG_NET=y
CONFIG_PCI=y
CONFIG_PCI_GOBIOS=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_NAMES=y
CONFIG_SYSVIPC=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_SYSCTL=y
CONFIG_KCORE_ELF=y
CONFIG_BINFMT_ELF=y
CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m
CONFIG_PARPORT_1284=y
CONFIG_BLK_DEV_FD=m
CONFIG_BLK_DEV_LOOP=m
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_NETFILTER=y
CONFIG_FILTER=y
CONFIG_UNIX=y
CONFIG_INET=y
CONFIG_SYN_COOKIES=y
CONFIG_IDE=y
CONFIG_BLK_DEV_IDE=y
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_BLK_DEV_IDECD=m
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
CONFIG_IDEDMA_PCI_AUTO=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_BLK_DEV_PIIX=y
CONFIG_PIIX_TUNING=y
CONFIG_IDEDMA_AUTO=y
CONFIG_BLK_DEV_IDE_MODES=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_SD_EXTRA_DEVS=40
CONFIG_BLK_DEV_SR=m
CONFIG_SR_EXTRA_DEVS=2
CONFIG_CHR_DEV_SG=m
CONFIG_SCSI_DEBUG_QUEUES=y
CONFIG_SCSI_AIC7XXX=y
CONFIG_AIC7XXX_CMDS_PER_DEVICE=8
CONFIG_AIC7XXX_RESET_DELAY=5
CONFIG_NETDEVICES=y
CONFIG_NET_ETHERNET=y
CONFIG_NET_PCI=y
CONFIG_NE2K_PCI=m
CONFIG_PPP=m
CONFIG_PPP_MULTILINK=y
CONFIG_PPP_ASYNC=m
CONFIG_PPP_DEFLATE=m
CONFIG_PPP_BSDCOMP=m
CONFIG_ISDN=m
CONFIG_ISDN_PPP=y
CONFIG_ISDN_PPP_VJ=y
CONFIG_ISDN_PPP_BSDCOMP=m
CONFIG_ISDN_DRV_HISAX=m
CONFIG_HISAX_EURO=y
CONFIG_HISAX_FRITZPCI=y
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_SERIAL=m
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=256
CONFIG_PRINTER=m
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_MINIX_FS=m
CONFIG_NTFS_FS=m
CONFIG_PROC_FS=y
CONFIG_DEVPTS_FS=y
CONFIG_EXT2_FS=y
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=m
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
CONFIG_NLS_ISO8859_15=m
CONFIG_NLS_UTF8=m
CONFIG_VGA_CONSOLE=y
CONFIG_VIDEO_SELECT=y
CONFIG_SOUND=m
CONFIG_SOUND_OSS=m
CONFIG_SOUND_TRACEINIT=y
CONFIG_SOUND_DMAP=y
CONFIG_SOUND_ADLIB=m
CONFIG_SOUND_SB=m
CONFIG_SOUND_YM3812=m

Output from sh scripts/ver_linux:

If some fields are empty or look unusual you may have an old version. Compare to the current minimal requirements in Documentation/Changes.

Linux tolot 2.4.4-pre5 #2 Fri Apr 20 08:32:13 CEST 2001 i586 unknown

Gnu C                  2.95.3
Gnu make               3.79.1
binutils               2.11.90.0.5
util-linux             2.11b
mount                  2.11b
modutils               2.4.5
e2fsprogs              1.19
pcmcia-cs              3.0.14
PPP                    2.4.1
isdn4k-utils           3.1pre1
Linux C Library        2.1.3
ldd: version 1.9.9
Procps                 2.0.7
Net-tools              1.60
Kbd                    0.99
Sh-utils               2.0.11
Modules Loaded         nls_utf8 nls_iso8859-15 nls_iso8859-2 nls_iso8859-1 nls_cp852 nls_cp850 nls_cp437 floppy sr_mod sg isofs ne2k-pci 8390 ide-cd cdrom adlib_card opl3 sb sb_lib uart401 sound soundcore lp parport serial

TIA,

Jochen Striepe.

Never send a man where you can send a bullet.

Its because you're using a version of gcc which doesn't have __builtin_expect (eg, egcs 1.1.2, some versions of gcc 2.95). I'm told that gcc 2.95.[12] are not suitable for kernel compilation...

I've currently got the following in my tree (sorry, no diff since I've got other changes in this file). lib/rwsem.c, line 9, add:

#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96) #define __builtin_expect(exp,c) (exp)
#endif

I'm not sure if this is correct, or which compilers work, which don't (so don't anyone go and drop it into Linus/Alans kernels), but it seems to work for me.

--
Russell King ([email protected]) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html

No 2.95.x has __builtin_expect. There might be some 2.95-derived GNUpro that supports it but I doubt anyone is using those to build kernels.

p.