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[netCDF #AQT-880974]: shared library build fails, missing symbols

Hello,

This is very odd; can you provide the 'config.log' file generated when you run 
configure for the shared library?

-Ward

> libnetcdf.so is missing some symbols (see error below). However, libnetcdf.a 
> contains the missing symbols.
> 
> 
> Error reported during make
> ```
> /bin/bash ../libtool  --tag=CC   --mode=link h5pcc  -fPIC -O0 -g  
> -L/usr/lib/x86_64-linux-gnu/hdf5/mpich/ -lhdf5_hl -lhdf5 -o ncgen3 main.o 
> load.o escapes.o getfill.o init.o genlib.o ncgentab.o ../liblib/libnetcdf.la 
> -lm
> libtool: link: h5pcc -fPIC -O0 -g -o .libs/ncgen3 main.o load.o escapes.o 
> getfill.o init.o genlib.o ncgentab.o  -L/usr/lib/x86_64-linux-gnu/hdf5/mpich/ 
> ../liblib/.libs/libnetcdf.so -lhdf5_hl -lhdf5 -lm -Wl,-rpath 
> -Wl,/home/user/netcdf-c-4.7.4-install/lib
> /usr/bin/ld: main.o: in function `usage':
> /home/user/netcdf-c-4.7.4/ncgen3/main.c:83: undefined reference to 
> `nc_inq_libvers'
> /usr/bin/ld: load.o: in function `gen_load_c':
> /home/user/netcdf-c-4.7.4/ncgen3/load.c:104: undefined reference to `strlcat'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/load.c:276: undefined reference 
> to `strlcat'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/load.c:277: undefined reference 
> to `strlcat'
> /usr/bin/ld: load.o: in function `load_netcdf':
> /home/user/netcdf-c-4.7.4/ncgen3/load.c:547: undefined reference to 
> `nc_put_vara_schar'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/load.c:551: undefined reference 
> to `nc_put_vara_text'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/load.c:554: undefined reference 
> to `nc_put_vara_short'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/load.c:557: undefined reference 
> to `nc_put_vara_int'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/load.c:560: undefined reference 
> to `nc_put_vara_float'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/load.c:563: undefined reference 
> to `nc_put_vara_double'
> /usr/bin/ld: genlib.o: in function `gen_netcdf':
> /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:45: undefined reference to 
> `nc_create'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:50: undefined 
> reference to `nc_def_dim'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:56: undefined 
> reference to `nc_def_var'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:70: undefined 
> reference to `nc_put_att_schar'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:75: undefined 
> reference to `nc_put_att_text'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:80: undefined 
> reference to `nc_put_att_short'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:85: undefined 
> reference to `nc_put_att_int'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:90: undefined 
> reference to `nc_put_att_float'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:95: undefined 
> reference to `nc_put_att_double'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:106: undefined 
> reference to `nc_set_fill'
> /usr/bin/ld: /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:110: undefined 
> reference to `nc_enddef'
> /usr/bin/ld: genlib.o: in function `cl_netcdf':
> /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:1260: undefined reference to 
> `nc_close'
> /usr/bin/ld: genlib.o: in function `check_err':
> /home/user/netcdf-c-4.7.4/ncgen3/genlib.c:1617: undefined reference to 
> `nc_strerror'
> collect2: error: ld returned 1 exit status
> make[2]: *** [Makefile:717: ncgen3] Error 1
> make[2]: Leaving directory '/home/user/netcdf-c-4.7.4/ncgen3'
> make[1]: *** [Makefile:707: all-recursive] Error 1
> make[1]: Leaving directory '/home/user/netcdf-c-4.7.4'
> make: *** [Makefile:552: all] Error 2
> ```
> 
> here is my configure line
> ```
> export HDF5_USE_SHLIB=yes; ./configure CC=h5pcc CFLAGS="-fPIC -O0 -g" 
> LDFLAGS="-L/usr/lib/x86_64-linux-gnu/hdf5/mpich/ -lhdf5_hl -lhdf5" 
> --enable-shared  --enable-static --disable-dap --enable-parallel-4 
> --prefix=/home/user/netcdf-c-4.7.4-install
> ```
> 
> The use of h5pcc was because hdf5 libraries are installed from the apt 
> package manager in a spot where they cannot be found by netcdf. The use of 
> and HDF5_USE_SHLIB=yes was because the hdf5 installed from the apt package 
> manager was not linked with -fPIC and hence had to force it to use shared 
> libraries.
> 
> 
> 


Ticket Details
===================
Ticket ID: AQT-880974
Department: Support netCDF
Priority: Normal
Status: Closed
===================
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