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[netCDF #SHB-551287]: netCDF-C 4.7.0 compilation

let me interject. We have discovered that on some systems, strdup()
get defined as a macro. I suspect that is what is happening here and
the macro expands to something containing the string "__extension__".
This will be fixed in the next release, but in the meantime, you
may be able to fix it by editing netcdf-c/include/ncconfigure.h as follows.
Change this line:
extern char* strdup(const char*);

to this set of lines:
#ifndef strdup
extern char* strdup(const char*);
#endif

Let us know if that solves the problem.

> 
> Can you provide the config.log file generated when you run 'configure'?  
> There is no '__extension__' found in ncconfigure.h; the config.log file will 
> help me try to duplicate this issue.
> 
> Thanks!
> 
> -Ward
> 
> >
> > Dear support,
> >
> > I'm trying to compile netcdf-c-4.7.0, but I have a repeatable error:
> >
> > libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -I../include -I../oc2 -O3
> > -mtune=skylake -march=native -fprefetch-loop-arrays -MT 
> > libdispatch_la-nctime.lo
> > -MD -MP -MF .deps/libdispatch_la-nctime.Tpo -c nctime.c  -fPIC -DPIC -o
> > .libs/libdispatch_la-nctime.o
> > In file included from /usr/include/string.h:633,
> > from nctime.c:23:
> > ../include/ncconfigure.h:29:14: error: expected identifier or ‘(’ before
> > ‘__extension__’
> > extern char* strdup(const char*);
> > ^~~~~~
> > make[1]: *** [Makefile:1049: libdispatch_la-nctime.lo] Error 1
> > make[1]: Leaving directory '/tmp/pj/test/netcdf-c-4.7.0/libdispatch'
> > make: *** [Makefile:700: check-recursive] Error 1
> >
> > My compiler is gcc 8.3.1 20190311 (Red Hat 8.3.1-3) installed by yum from
> > devtoolset-8 and OS Centos7.
> >
> > # NetCDF C Configuration Summary
> > ==============================
> >
> > # General
> > -------
> > NetCDF Version:             4.7.0
> > Configured On:              Tue Jul 23 10:45:18 EEST 2019
> > Host System:                x86_64-pc-linux-gnu
> > Build Directory:    /tmp/pj/test/netcdf-c-4.7.0
> > Install Prefix:         /opt/linux2.17-x86_64/hdf5/netcdf/4.7.0
> >
> > # Compiling Options
> > -----------------
> > C Compiler:         /opt/rh/devtoolset-8/root/usr/bin/gcc
> > CFLAGS:                     -O3 -mtune=skylake  -march=native 
> > -fprefetch-loop-arrays
> > CPPFLAGS:
> > LDFLAGS:
> > AM_CFLAGS:
> > AM_CPPFLAGS:
> > AM_LDFLAGS:
> > Shared Library:             yes
> > Static Library:             yes
> > Extra libraries:    -lsz -lhdf5_hl -lhdf5 -lm -ldl -lz -lcurl
> >
> > # Features
> > --------
> > NetCDF-2 API:               yes
> > HDF4 Support:               no
> > HDF5 Support:               yes
> > NetCDF-4 API:               yes
> > NC-4 Parallel Support:      no
> > PnetCDF Support:    no
> > DAP2 Support:               yes
> > DAP4 Support:               yes
> > Byte-Range Support: no
> > Diskless Support:   yes
> > MMap Support:               no
> > JNA Support:                no
> > CDF5 Support:               yes
> > ERANGE Fill Support:        no
> > Relaxed Boundary Check:     yes
> > [pj@sepelrastas netcdf-c-4.7.0]$ make -j 4 check install
> > ...
> >
> >
> > Best Regards,
> 
> >
> >
> >
> 

=Dennis Heimbigner
  Unidata


Ticket Details
===================
Ticket ID: SHB-551287
Department: Support netCDF
Priority: Normal
Status: Open
===================
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