Does Qt4.7.3 have specific requirement of the glibc version?
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Hello,
I am cross-compiling Qt for embedded linux.
after deployment on the target device, i run the application but get the following errors:
./fancybrowser: /lib/libc.so.6: versionGLIBC_2.9' not found (required by /home/root/libQtGui.so.4) ./fancybrowser: /lib/libc.so.6: versionGLIBC_2.10' not found (required by /home/root/libQtNetwork.so.4)
./fancybrowser: /lib/libc.so.6: version `GLIBC_2.9' not found (required by /home/root/libQtCore.so.4)after that, i cross-complied a very simple application which can run normally on the target device.
my target device has a libc.2.5.so, so i think that maybe qt4.7.3 has a requirement on glibc version?my qmake.conf:
@include(../../common/g++.conf)
include(../../common/linux.conf)
include(../../common/qws.conf)modifications to g++.conf
QMAKE_CC = i686-pc-linux-gnu-gcc
QMAKE_CXX = i686-pc-linux-gnu-g++
QMAKE_LINK = i686-pc-linux-gnu-g++
QMAKE_LINK_SHLIB = i686-pc-linux-gnu-g++QMAKE_INCDIR = /root/CodeSourcery/Sourcery_G++_Lite/i686-pc-linux-gnu/libc/usr/include
QMAKE_LIBDIR = /root/CodeSourcery/Sourcery_G++_Lite/i686-pc-linux-gnu/libc/usr/libmodifications to linux.conf
QMAKE_AR = i686-pc-linux-gnu-ar cqs
QMAKE_OBJCOPY = i686-pc-linux-gnu-objcopy
QMAKE_STRIP = i686-pc-linux-gnu-stripload(qt_config)@
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@
root@adewang-desktop:~/tmp/qtEmbed/examples/webkit/fancybrowser# ldd fancybrowser
linux-gate.so.1 => (0x00bc8000)
libQtWebKit.so.4 => /root/tmp/QtEmbed/lib/libQtWebKit.so.4 (0x00bc9000)
libQtGui.so.4 => /root/tmp/QtEmbed/lib/libQtGui.so.4 (0x17a39000)
libQtNetwork.so.4 => /root/tmp/QtEmbed/lib/libQtNetwork.so.4 (0x0034c000)
libQtCore.so.4 => /root/tmp/QtEmbed/lib/libQtCore.so.4 (0x006e6000)
libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0x00aa6000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00110000)
libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0x00206000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x0022c000)
libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0x00418000)
libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0x00a57000)
librt.so.1 => /lib/tls/i686/cmov/librt.so.1 (0x005a3000)
/lib/ld-linux.so.2 (0x006c9000)
@
i have definded
QMAKE_LIBDIR = /root/CodeSourcery/Sourcery_G++_Lite/i686-pc-linux-gnu/libc/usr/lib
why does the excutable not linked to those lib in /root/CodeSourcery/Sourcery_G++_Lite/i686-pc-linux-gnu/libc/usr/lib, but still linked to the default libs in /lib/tls/i686/cmov?when i build qt, i used the following configure options:
@./configure -xplatform qws/linux-i686-g++ -embedded x86 -D QT_NO_QWS_MULTIPROCESS
-prefix /root/tmp/QtEmbed
-qt-gfx-linuxfb -qt-gfx-vnc
-no-largefile -exceptions -no-accessibility -no-qt3support -no-sse2 -qt-zlib -no-gif -no-libtiff
-qt-libpng -no-libmng -qt-libjpeg -no-openssl -no-nis -no-cups -depths 16
-qt-kbd-linuxinput -nomake demos -nomake examples
-confirm-license -opensource@Edit: Added @ tags [ZapB]
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Well, since you look to be building on an i686 for a different i686 it looks as if something is getting confused and using the wrong toolchain resulting in the wrong glibc (and others) being linked in when you build Qt.
You need to ensure that i686-pc-linux-gnu-gcc and friends actually get resolved to the compiler that is part of your embedded toolchain rather than your normal system compiler. Hopefully that will be enough to get the toolchain to link to the correct libs. If not, then we may need to look at adjusting the linker search path.
So try doing:
@
which i686-pc-linux-gnu-gcc
@and see if it resolves to the embedded cross compiler. If not, adjust $PATH environment variable so that it does and try re-configuring and rebuilding Qt.
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Hmmm, OK then. Here's some more things to check:
- Look over the output of Qt's configure command to make sure it all looks sane.
- Look at the output during the Qt build to make sure that looks sane
- Ensure that it is not just a case of your $LD_LIBRARY_PATH or /etc/ld.so.conf causing ldd to return spurious results.
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Search locations can also be hard-coded into the libs themselves. Google for RPATH to read about it. You can check the dynamic section of the generated lib/binary by doing this for e.g.:
@
readelf -d libQtCore.so
@ -
@Dynamic section at offset 0x2e2c8c contains 28 entries:
Tag Type Name/Value
0x00000001 (NEEDED) Shared library: [libpthread.so.0]
0x00000001 (NEEDED) Shared library: [libdl.so.2]
0x00000001 (NEEDED) Shared library: [librt.so.1]
0x00000001 (NEEDED) Shared library: [libstdc++.so.6]
0x00000001 (NEEDED) Shared library: [libm.so.6]
0x00000001 (NEEDED) Shared library: [libgcc_s.so.1]
0x00000001 (NEEDED) Shared library: [libc.so.6]
0x0000000e (SONAME) Library soname: [libQtCore.so.4]
0x0000000f (RPATH) Library rpath: [/root/tmp/QtEmbed/lib]
0x0000000c (INIT) 0x42744
0x0000000d (FINI) 0x1b99f8
0x00000004 (HASH) 0xd4
0x00000005 (STRTAB) 0x14a98
0x00000006 (SYMTAB) 0x4f98
0x0000000a (STRSZ) 135346 (bytes)
0x0000000b (SYMENT) 16 (bytes)
0x00000003 (PLTGOT) 0x2e4094
0x00000002 (PLTRELSZ) 15016 (bytes)
0x00000014 (PLTREL) REL
0x00000017 (JMPREL) 0x3ec9c
0x00000011 (REL) 0x37c6c
0x00000012 (RELSZ) 28720 (bytes)
0x00000013 (RELENT) 8 (bytes)
0x6ffffffe (VERNEED) 0x37aac
0x6fffffff (VERNEEDNUM) 7
0x6ffffff0 (VERSYM) 0x35b4a
0x6ffffffa (RELCOUNT) 1624
0x00000000 (NULL) 0x0
@No information is related with /lib/tls/i686/cmov