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readme: document failed attempt to get newer uclibc to fix aarch64 proc_events

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Ciro Santilli
2018-04-17 10:36:28 +01:00
parent 4e42e29f6d
commit de9dba276b
2 changed files with 36 additions and 3 deletions
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38
README.adoc
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@@ -2442,7 +2442,7 @@ TODO: why does this produce no output?
==== CONFIG_PROC_EVENTS aarch64
Was failing with:
0111ca406bdfa6fd65a2605d353583b4c4051781 was failing with:
....
>>> kernel_module 1.0 Building
@@ -2459,9 +2459,41 @@ so we commented it out.
Related threads:
* https://mailman.uclibc-ng.org/pipermail/devel/2018-January/001624.html lets try to update uclibc, possibly track it as a submodule already :-)
* https://mailman.uclibc-ng.org/pipermail/devel/2018-January/001624.html
* https://github.com/DynamoRIO/dynamorio/issues/2356
If we try to naively update uclibc to 1.0.29 with `buildroot_override`, which contains the above mentioned patch, clean `aarch64` test build fails with:
....
../utils/ldd.c: In function 'elf_find_dynamic':
../utils/ldd.c:238:12: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
return (void *)byteswap_to_host(dynp->d_un.d_val);
^
/tmp/user/20321/cciGScKB.o: In function `process_line_callback':
msgmerge.c:(.text+0x22): undefined reference to `escape'
/tmp/user/20321/cciGScKB.o: In function `process':
msgmerge.c:(.text+0xf6): undefined reference to `poparser_init'
msgmerge.c:(.text+0x11e): undefined reference to `poparser_feed_line'
msgmerge.c:(.text+0x128): undefined reference to `poparser_finish'
collect2: error: ld returned 1 exit status
Makefile.in:120: recipe for target '../utils/msgmerge.host' failed
make[2]: *** [../utils/msgmerge.host] Error 1
make[2]: *** Waiting for unfinished jobs....
/tmp/user/20321/ccF8V8jF.o: In function `process':
msgfmt.c:(.text+0xbf3): undefined reference to `poparser_init'
msgfmt.c:(.text+0xc1f): undefined reference to `poparser_feed_line'
msgfmt.c:(.text+0xc2b): undefined reference to `poparser_finish'
collect2: error: ld returned 1 exit status
Makefile.in:120: recipe for target '../utils/msgfmt.host' failed
make[2]: *** [../utils/msgfmt.host] Error 1
package/pkg-generic.mk:227: recipe for target '/data/git/linux-kernel-module-cheat/out/aarch64/buildroot/build/uclibc-custom/.stamp_built' failed
make[1]: *** [/data/git/linux-kernel-module-cheat/out/aarch64/buildroot/build/uclibc-custom/.stamp_built] Error 2
Makefile:79: recipe for target '_all' failed
make: *** [_all] Error 2
....
Buildroot master has already moved to uclibc 1.0.29 at f8546e836784c17aa26970f6345db9d515411700, but it is not yet in any tag... so I'm not tempted to update it yet just for this.
==== ftrace
Trace a single function:
@@ -4446,7 +4478,7 @@ dmesg
We provide the following mechanisms:
* `./build -b data/br2`: append the buildroot configuration file `data/br2` to a single build. Must be passed every time you run `./build`. The format is the same as link:br2[].
* `./build -b data/br2`: append the Buildroot configuration file `data/br2` to a single build. Must be passed every time you run `./build`. The format is the same as link:br2[].
* `./build -B 'BR2_SOM_OPTION="myval"'`: append a single option to a single build.
You will then likely want to make those more permanent with: <<retype>>

1
buildroot_override
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@@ -2,3 +2,4 @@ HOST_QEMU_OVERRIDE_SRCDIR = ../qemu
LINUX_OVERRIDE_SRCDIR = ../linux
PARSEC_BENCHMARK_OVERRIDE_SRCDIR = ../parsec-benchmark/parsec-benchmark
QEMU_OVERRIDE_SRCDIR = ../qemu
# UCLIBC_OVERRIDE_SRCDIR = ../uclibc-ng