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SubjectRe: Build regressions/improvements in v4.5-rc7
Hi,

On Mon, Mar 07, 2016 at 10:01:09AM +0100, Geert Uytterhoeven wrote:
> On Mon, Mar 7, 2016 at 9:55 AM, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > JFYI, when comparing v4.5-rc7[1] to v4.5-rc6[3], the summaries are:
> > - build errors: +8/-7
> + error: debugfs.c: undefined reference to `clk_round_rate': =>
> .text+0x11b9e0)
>
> arm-randconfig
>
> While looking for more context, I noticed another regression that fell through
> the cracks of my script:
>
> arch/arm/kernel/head.o: In function `stext':
> (.head.text+0x40): undefined reference to `CONFIG_PHYS_OFFSET'
> drivers/built-in.o: In function `v4l2_clk_set_rate':
> debugfs.c:(.text+0x11b9e0): undefined reference to `clk_round_rate'
>
> + error: misc.c: undefined reference to `ftrace_likely_update': =>
> .text+0x714), .text+0x94c), .text+0x3b8), .text+0xc10)
>
> sh-randconfig
>
> arch/sh/boot/compressed/misc.o: In function `lzo1x_decompress_safe':
> misc.c:(.text+0x3b8): undefined reference to `ftrace_likely_update'
> misc.c:(.text+0x714): undefined reference to `ftrace_likely_update'
> misc.c:(.text+0x94c): undefined reference to `ftrace_likely_update'
> arch/sh/boot/compressed/misc.o: In function `unlzo.constprop.2':
> misc.c:(.text+0xc10): undefined reference to `ftrace_likely_update'
>
> + /tmp/cc52LvuK.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}: => 41, 403
> + /tmp/ccHfoDA4.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}: => 43
> + /tmp/cch1r0UQ.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}: => 49, 378
> + /tmp/ccoHdFI8.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}: => 43
>
> mips-allnoconfig
> bigsur_defconfig
> malta_defconfig
> cavium_octeon_defconfig
>
> Not really new, but it would be great if the MIPS people could get this
> fixed for the final release.

This would appear to be related to the ld version check for VDSO
failing.

awk: /home/kisskb/slave/src/scripts/ld-version.sh: line 4: regular expression compile failed (missing '(')
.*)
/bin/sh: 1: [: -lt: unexpected operator

I.e. this line:
gsub(".*)", "");

appears to be trying to turn e.g. "GNU ld (Gentoo 2.25.1 p1.1) 2.25.1"
into " 2.25.1", so perhaps the bracket should be escaped. What version
of awk is it using? (GNU Awk 4.0.2 works for me).

Can somebody experiencing this please try:
${CROSS_COMPILE}ld --version | ./scripts/ld-version.sh

with the following patch, to see if it helps.

Thanks
James

diff --git a/scripts/ld-version.sh b/scripts/ld-version.sh
index 198580d245e0..1659b409ef10 100755
--- a/scripts/ld-version.sh
+++ b/scripts/ld-version.sh
@@ -1,7 +1,7 @@
#!/usr/bin/awk -f
# extract linker version number from stdin and turn into single number
{
- gsub(".*)", "");
+ gsub(".*\\)", "");
split($1,a, ".");
print a[1]*10000000 + a[2]*100000 + a[3]*10000 + a[4]*100 + a[5];
exit[unhandled content-type:application/pgp-signature]
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