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<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> I
found the trick why buildroot couldn't handle a "mips + n32 abi"
configuration.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> Using
the current buildroot, if you "make menuconfig" and select "mipsel
+ n32 abi", the config scripts will assign a <i><span style='font-style:
italic'>mips-linux-uclibc</span></i> like name to $(REAL_GNU_TARGET_NAME),
which is passed to the "--target= "config option for binutils and
other tools. Unfortunately, binutils decides its default ABI by the target name.
If the name is mips*-linux like, it uses o32. Otherwise, if it is mips64*-linux
like, it uses n32.<o:p></o:p></span></font></p>
<p class=MsoPlainText style='text-indent:21.0pt'><font size=1
face="Times New Roman"><span lang=EN-US style='font-size:9.0pt;font-family:
"Times New Roman"'>I added a workaround in <i><span style='font-style:italic'>target/Config.in.arch</span></i>
to fix the problem.<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:21.0pt;mso-para-margin-left:2.0gd'><font
size=1 face=Courier><span lang=EN-US style='font-size:9.0pt;font-family:Courier'> config
BR2_ARCH<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:21.0pt;mso-para-margin-left:2.0gd'><font
size=1 face=Courier><span lang=EN-US style='font-size:9.0pt;font-family:Courier'> …<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:21.0pt;mso-para-margin-left:2.0gd'><font
size=1 face=Courier><span lang=EN-US style='font-size:9.0pt;font-family:Courier'> default
"mipsel" if BR2_mipsel && BR2_MIPS_OABI32<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:21.0pt;mso-para-margin-left:2.0gd'><font
size=1 face=Courier><span lang=EN-US style='font-size:9.0pt;font-family:Courier'> default
"mips64el" if BR2_mipsel && BR2_MIPS_A</span></font><font
face=Courier><span lang=EN-US style='font-family:Courier'>BI32<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> </span></font><font
face="Times New Roman"><span lang=EN-US style='font-family:"Times New Roman"'>This
time, $(REAL_GNU_TARGET_NAME) is set to be <i><span style='font-style:italic'>mips64el-linux-uclibc</span></i>
and the building succeeds, although with two minor problems in the middle:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>1) In file included from
/home/jczhang/research/buildroot/toolchain_build_mips64el/gcc-<st1:chsdate
IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">4.2.4</st1:chsdate>/libmudflap/mf-hooks1.c:58:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>/home/jczhang/research/buildroot/build_mips64el/staging_dir/usr/include/unistd.h:243:
error: two or more data types in declaration specifiers<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>...<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>make[1]: Leaving directory
`/home/jczhang/research/buildroot/toolchain_build_mips64el/gcc-<st1:chsdate
IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">4.2.4</st1:chsdate>-final'<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>make: *** [all] Error 2<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>workaround: (searched
from the web): add --disable-libmudflap to “Additional gcc options”<o:p></o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>2)find
/home/jczhang/research/buildroot/project_build_mips64el/uclibc/root/usr/lib
-name '*.a' -delete<o:p></o:p></span></font></p>
<p class=MsoPlainText style='text-indent:9.0pt'><font size=1
face="Times New Roman"><span lang=EN-US style='font-size:9.0pt;font-family:
"Times New Roman"'>find: invalid predicate `-delete'<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>Fix: In
buildroot/Makefile, change stuffs such as “find $(TARGET_DIR)/usr/lib
-name '*.a' –delete to “… -name | xargs rm -rf”<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> </span></font><font
face="Times New Roman"><span lang=EN-US style='font-family:"Times New Roman"'><o:p></o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>-----------------------Original
Message-----------------------------------------------------------<br>
Hi,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> I have a problem
when build a mipsel n32 cross compiler uclibc toolchain<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>on a CentOS4/X86_64 host.
The buildroot I used is the snapshot<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>buildroot-20081210.tar.bz2.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> Firstly I issue
"make menuconfig" under buildroot directory. Among the<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>target options, I choose
"mipsel, mips4, n32".<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> Secondly, I issue
"make uclibc-menuconfig" under buildroot. In the<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>"Target Architecture
Features and Options", I adjust the miss-guessed<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>"Target ABI"
from O32 to N32. Other options are left unchanged.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> Then I type
"make" to build. I find binutils-2.19, gcc-<st1:chsdate
IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">4.2.4</st1:chsdate>-initial
are<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>all successfully built.
But when building uClibc-<st1:chsdate IsROCDate="False"
IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">0.9.30</st1:chsdate>,
the following<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>error happens:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> ....<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> AS
ldso/ldso/mips/resolve.oS<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> AR cr
ldso/ldso/ld-uClibc_so.a<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> STRIP -x -R .note
-R .comment ldso/ldso/ld-uClibc_so.a<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> LD ld-uClibc-<st1:chsdate
IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">0.9.30</st1:chsdate>.so<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>collect2: ld terminated
with signal 11 [Segmentation fault]<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>/home/jczhang/research/buildroot/build_mipsel/staging_dir/usr/lib/gcc/mipsel-linux-uclibc/<st1:chsdate
IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">4.2.4</st1:chsdate>/../../../../mipsel-linux-uclibc/bin/ld:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>ldso/ldso/ld-uClibc_so.a(ldso.oS):
ABI is incompatible with that of the<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>selected emulation<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>/home/jczhang/research/buildroot/build_mipsel/staging_dir/usr/lib/gcc/mipsel-linux-uclibc/<st1:chsdate
IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">4.2.4</st1:chsdate>/../../../../mipsel-linux-uclibc/bin/ld:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>failed to merge target
specific data of file<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>ldso/ldso/ld-uClibc_so.a(ldso.oS)<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>/home/jczhang/research/buildroot/build_mipsel/staging_dir/usr/lib/gcc/mipsel-linux-uclibc/<st1:chsdate
IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">4.2.4</st1:chsdate>/../../../../mipsel-linux-uclibc/bin/ld:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>ldso/ldso/ld-uClibc_so.a(resolve.oS):
ABI is incompatible with that of the<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>selected emulation<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>/home/jczhang/research/buildroot/build_mipsel/staging_dir/usr/lib/gcc/mipsel-linux-uclibc/<st1:chsdate
IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">4.2.4</st1:chsdate>/../../../../mipsel-linux-uclibc/bin/ld:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>failed to merge target
specific data of file<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>ldso/ldso/ld-uClibc_so.a(resolve.oS)<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>ldso/ldso/ld-uClibc_so.a(ldso.oS):
In function `_start':<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>ldso.c:(.text+0x20):
undefined reference to `_DYNAMIC'<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>make[1]: ***
[lib/ld-uClibc.so] Error 1<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>make[1]: Leaving
directory<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>`/home/jczhang/research/buildroot/toolchain_build_mipsel/uClibc-<st1:chsdate
IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">0.9.30</st1:chsdate>'<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>make: ***<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>[/home/jczhang/research/buildroot/toolchain_build_mipsel/uClibc-<st1:chsdate
IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899" w:st="on">0.9.30</st1:chsdate>/lib/libc.a]<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>Error 2<o:p></o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> I made some
investigation on the problem. I found ldso.oS is a<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>n32 ELF file. But the
linker(i.e.,buildroot/build_mipsel/staging_dir<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>/usr/mipsel-linux-uclibc/bin/ld)'s
default link script uses an o32 format.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>So the linker complains
conflict ABIs between the input file(ld-uClibc_so.a)<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>and the output
file(ld-uClibc-<st1:chsdate IsROCDate="False" IsLunarDate="False" Day="30"
Month="12" Year="1899" w:st="on">0.9.30</st1:chsdate>.so)<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> But why buildroot
builds a binutils like this? I don't have any idea.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> Any help is
appreciated.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'> Thanks!<o:p></o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font face="Times New Roman"><span lang=EN-US
style='font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>Internal Virus Database
is out of date.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>Checked by AVG -
http://www.avg.com <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face="Times New Roman"><span lang=EN-US
style='font-size:9.0pt;font-family:"Times New Roman"'>Version: 8.0.176 / Virus
Database: 270.9.13/1827 - Release Date: 2008-12-3 17:41<o:p></o:p></span></font></p>
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