<P>Sir,</P>
<P>&nbsp;&nbsp; Some errors occured when installing the libpng .Here are the details about the error:</P>
<P><A href="mailto:wangyifan@wangyifan-ThinkPad-Edge-E535:~/Build_WRF/LIBRARIES/libpng-1.2.50$" target="_blank">wangyifan@wangyifan-ThinkPad-Edge-E535:~/Build_WRF/LIBRARIES/libpng-1.2.50$</A> makemake&nbsp; all-am<BR>make[1]: 正在进入目录 `/home/wangyifan/Build_WRF/LIBRARIES/libpng-1.2.50'<BR>/bin/bash ./libtool --tag=CC&nbsp;&nbsp; --mode=link gcc&nbsp; -g -O2 -no-undefined -export-dynamic -version-number 0:50:0 -Wl,--version-script=libpng.vers&nbsp; -Lpath_to_directory/Build_WRF/LIBRARIES/grib2/lib -o libpng12.la -rpath /usr/local/lib libpng12_la-png.lo libpng12_la-pngset.lo libpng12_la-pngget.lo libpng12_la-pngrutil.lo libpng12_la-pngtrans.lo libpng12_la-pngwutil.lo libpng12_la-pngread.lo libpng12_la-pngrio.lo libpng12_la-pngwio.lo libpng12_la-pngwrite.lo libpng12_la-pngrtran.lo libpng12_la-pngwtran.lo libpng12_la-pngmem.lo libpng12_la-pngerror.lo libpng12_la-pngpread.lo&nbsp; -lz -lm <BR>./libtool: line 4984: cd: path_to_directory/Build_WRF/LIBRARIES/grib2/lib: No such file or directory<BR>libtool: link: cannot determine absolute directory name of `path_to_directory/Build_WRF/LIBRARIES/grib2/lib'<BR>make[1]: *** [libpng12.la] 错误 1<BR>make[1]:正在离开目录 `/home/wangyifan/Build_WRF/LIBRARIES/libpng-1.2.50'<BR>make: *** [all] 错误 2<BR><A href="mailto:wangyifan@wangyifan-ThinkPad-Edge-E535:~/Build_WRF/LIBRARIES/libpng-1.2.50$" target="_blank">wangyifan@wangyifan-ThinkPad-Edge-E535:~/Build_WRF/LIBRARIES/libpng-1.2.50$</A> sudo make install<BR>/bin/bash ./libtool --tag=CC&nbsp;&nbsp; --mode=link gcc&nbsp; -g -O2 -no-undefined -export-dynamic -version-number 0:50:0 -Wl,--version-script=libpng.vers&nbsp; -Lpath_to_directory/Build_WRF/LIBRARIES/grib2/lib -o libpng12.la -rpath /usr/local/lib libpng12_la-png.lo libpng12_la-pngset.lo libpng12_la-pngget.lo libpng12_la-pngrutil.lo libpng12_la-pngtrans.lo libpng12_la-pngwutil.lo libpng12_la-pngread.lo libpng12_la-pngrio.lo libpng12_la-pngwio.lo libpng12_la-pngwrite.lo libpng12_la-pngrtran.lo libpng12_la-pngwtran.lo libpng12_la-pngmem.lo libpng12_la-pngerror.lo libpng12_la-pngpread.lo&nbsp; -lz -lm <BR>./libtool: line 4984: cd: path_to_directory/Build_WRF/LIBRARIES/grib2/lib: No such file or directory<BR>libtool: link: cannot determine absolute directory name of `path_to_directory/Build_WRF/LIBRARIES/grib2/lib'<BR>make: *** [libpng12.la] 错误 1</P>
<P>&nbsp;&nbsp;&nbsp; I am really appreciate for your help.</P>
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