Solve undefined reference to ' png_create_write_struct ' and so on



Operating system: Ubuntu12.04

QT Version: 4.8.5

I compile-time reference article: Http://hi.baidu.com/applesn/item/ce62411c18530cff86ad4e75

For system reasons, to recompile QT today, the following error occurred while compiling the PC version of the QVFB make step:

. obj/release-shared/qanimationwriter.o:in function ' Qanimationwriter::qanimationwriter (QString const&, Char const*) ':
Qanimationwriter.cpp: (. text+0xbf): Undefined reference to ' png_create_write_struct '
Qanimationwriter.cpp: (. text+0xca): Undefined reference to ' png_create_info_struct '
Qanimationwriter.cpp: (. text+0xe0): Undefined reference to ' png_set_compression_level '
Qanimationwriter.cpp: (. text+0xff): Undefined reference to ' PNG_SET_WRITE_FN '
. obj/release-shared/qanimationwriter.o:in function ' Qanimationwritermng::write (png_struct_def*, unsigned char*, unsigned int) ':
Qanimationwriter.cpp: (. Text._zn19qanimationwritermng5writeep14png_struct_defphj[qanimationwritermng::write (PNG _struct_def*, unsigned char*, unsigned int)]+0xb): Undefined reference to ' png_get_io_ptr '
. obj/release-shared/qanimationwriter.o:in function ' Qanimationwritermng::composeimage (QImage const&, QPoint const&) ':
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x65): Undefined reference to ' Png_write_chunk '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x78): Undefined reference to ' png_set_sig_bytes '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0xda): Undefined reference to ' PNG_SET_IHDR '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0xec): Undefined reference to ' Png_write_info '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x107): Undefined reference to ' PNG_SET_BGR '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x154): Undefined reference to ' png_write_image '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x172): Undefined reference to ' png_write_end '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x184): Undefined reference to ' png_destroy_write_struct '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x1a8): Undefined reference to ' png_create_write_struct '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x1b3): Undefined reference to ' png_create_info_struct '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x1c9): Undefined reference to ' png_set_compression_level '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x1e8): Undefined reference to ' PNG_SET_WRITE_FN '
Qanimationwriter.cpp: (. TEXT._ZN19QANIMATIONWRITERMNG12COMPOSEIMAGEERK6QIMAGERK6QPOINT[QANIMATIONWRITERMNG:: Composeimage (QImage const&amp, Qpoint const&)]+0x21f): Undefined reference to ' Png_set_filler '
. obj/release-shared/qanimationwriter.o:in function ' qanimationwritermng::~qanimationwritermng () ':
Qanimationwriter.cpp: (. text._zn19qanimationwritermngd0ev[_zn19qanimationwritermngd5ev]+0x9e): undefined Reference to ' Png_write_chunk '
Qanimationwriter.cpp: (. text._zn19qanimationwritermngd0ev[_zn19qanimationwritermngd5ev]+0xb0): undefined Reference to ' png_destroy_write_struct '
Qanimationwriter.cpp: (. text._zn19qanimationwritermngd0ev[_zn19qanimationwritermngd5ev]+0x176): undefined Reference to ' Png_write_chunk '
. obj/release-shared/qanimationwriter.o:in function ' Qanimationwritermng::setimage (QImage const&) ':
Qanimationwriter.cpp: (. Text._zn19qanimationwritermng8setimageerk6qimage[qanimationwritermng::setimage (QImage const&)]+0xc3): Undefined reference to ' Png_write_chunk '
. obj/release-shared/qanimationwriter.o:in function ' qanimationwritermng::~qanimationwritermng () ':
Qanimationwriter.cpp: (. text._zn19qanimationwritermngd2ev[_zn19qanimationwritermngd5ev]+0x9e): undefined Reference to ' Png_write_chunk '
Qanimationwriter.cpp: (. text._zn19qanimationwritermngd2ev[_zn19qanimationwritermngd5ev]+0xb0): undefined Reference to ' png_destroy_write_struct '
Qanimationwriter.cpp: (. text._zn19qanimationwritermngd2ev[_zn19qanimationwritermngd5ev]+0x16e): undefined Reference to ' Png_write_chunk '
COLLECT2:LD return 1
Make: * * * * [...] /.. /BIN/QVFB] Error 1

Screenshot below:

Solution:

The first step: #locate libpng

My computer shows the following:

/lib/i386-linux-gnu/libpng12.so.0
/lib/i386-linux-gnu/libpng12.so.0.46.0
/usr/share/doc/libpng12-0
/usr/share/doc/libpng12-0/announce
/usr/share/doc/libpng12-0/knownbug
/usr/share/doc/libpng12-0/readme. Debian
/usr/share/doc/libpng12-0/readme.gz
/usr/share/doc/libpng12-0/todo
/usr/share/doc/libpng12-0/changelog. Debian.gz
/usr/share/doc/libpng12-0/copyright
/usr/share/doc/libpng12-0/libpng-1.2.46.txt.gz
/usr/share/doc-base/libpng12
/var/lib/doc-base/documents/libpng12
/var/lib/dpkg/info/libpng12-0:i386.list
/var/lib/dpkg/info/libpng12-0:i386.md5sums
/var/lib/dpkg/info/libpng12-0:i386.postinst
/var/lib/dpkg/info/libpng12-0:i386.postrm
/var/lib/dpkg/info/libpng12-0:i386.shlibs

Step Two: Establish link #ln-s/lib/i386-linux-gnu/libpng12.so.0/lib/i386-linux-gnu/libpng.so

Step three: Modify the Makefile file, #gedit Makefile (or #vi Makefile), add-l/lib/i386-linux-gnu-lpng after Libs

After the reset, success.