操作系统：Ubuntu12.04
QT版本：4.8.5
由于系统原因，今天要重新编译QT，在编译PC版的qvfb的make步骤时，出现了如下错误：
.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&, QPoint const&)]+0x65): undefined reference to `png_write_chunk'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0x78): undefined reference to `png_set_sig_bytes'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0xda): undefined reference to `png_set_IHDR'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0xec): undefined reference to `png_write_info'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0x107): undefined reference to `png_set_bgr'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0x154): undefined reference to `png_write_image'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0x172): undefined reference to `png_write_end'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0x184): undefined reference to `png_destroy_write_struct'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0x1a8): undefined reference to `png_create_write_struct'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0x1b3): undefined reference to `png_create_info_struct'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0x1c9): undefined reference to `png_set_compression_level'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, QPoint const&)]+0x1e8): undefined reference to `png_set_write_fn'
qanimationwriter.cpp:(.text._ZN19QAnimationWriterMNG12composeImageERK6QImageRK6QPoint[QAnimationWriterMNG::composeImage(QImage const&, 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 返回 1
make: *** [../../bin/qvfb] 错误 1
截图如下：
解决办法：
第一步：#locate libpng
我的电脑显示如下：