parallel I/O build tests break with run_examples4.sh error

[edwardhartnett]

I just found this:

 bash -x run_examples4.sh
+ test x = x
++ pwd
+ srcdir=/home/ed/netcdf-c/examples/C
+ . ../../test_common.sh
++ TOPSRCDIR=/home/ed/netcdf-c
++ TOPBUILDDIR=/home/ed/netcdf-c
++ FP_ISCMAKE=
++ FP_ISMSVC=
++ FP_ISCYGWIN=
++ FP_ISMINGW=
++ FP_ISMSYS=
++ FP_ISREGEDIT=yes
++ FP_USEPLUGINS=yes
++ FEATURE_HDF5=yes
++ FEATURE_HDF5=yes
++ FEATURE_S3TESTS=no
++ FEATURE_NCZARR_ZIP=no
++ FEATURE_FILTERTESTS=yes
++ set -e
++ test x = x1
++ test x = xyes
++ test x = xyes
++ test x = xyes
++ top_srcdir=/home/ed/netcdf-c
++ top_builddir=/home/ed/netcdf-c
++ test x/home/ed/netcdf-c/examples/C = x
+++ pwd
++ builddir=/home/ed/netcdf-c/examples/C
++ execdir=/home/ed/netcdf-c/examples/C
+++ basename /home/ed/netcdf-c/examples/C
++ thisdir=C
+++ pwd
++ WD=/home/ed/netcdf-c/examples/C
++ cd /home/ed/netcdf-c/examples/C
+++ pwd
++ srcdir=/home/ed/netcdf-c/examples/C
++ cd /home/ed/netcdf-c/examples/C
++ cd /home/ed/netcdf-c
+++ pwd
++ top_srcdir=/home/ed/netcdf-c
++ cd /home/ed/netcdf-c/examples/C
++ cd /home/ed/netcdf-c/examples/C
+++ pwd
++ builddir=/home/ed/netcdf-c/examples/C
++ cd /home/ed/netcdf-c/examples/C
++ cd /home/ed/netcdf-c
+++ pwd
++ top_builddir=/home/ed/netcdf-c
++ cd /home/ed/netcdf-c/examples/C
++ cd /home/ed/netcdf-c/examples/C
+++ pwd
++ execdir=/home/ed/netcdf-c/examples/C
++ cd /home/ed/netcdf-c/examples/C
++ export srcdir top_srcdir builddir top_builddir execdir
++ test -e /home/ed/netcdf-c/ncdump/ncdump.exe
++ ext=
++ export NCDUMP=/home/ed/netcdf-c/ncdump/ncdump
++ NCDUMP=/home/ed/netcdf-c/ncdump/ncdump
++ export NCCOPY=/home/ed/netcdf-c/ncdump/nccopy
++ NCCOPY=/home/ed/netcdf-c/ncdump/nccopy
++ export NCGEN=/home/ed/netcdf-c/ncgen/ncgen
++ NCGEN=/home/ed/netcdf-c/ncgen/ncgen
++ export NCGEN3=/home/ed/netcdf-c/ncgen3/ncgen3
++ NCGEN3=/home/ed/netcdf-c/ncgen3/ncgen3
++ export NCPATHCVT=/home/ed/netcdf-c/ncdump/ncpathcvt
++ NCPATHCVT=/home/ed/netcdf-c/ncdump/ncpathcvt
++ ncgen3c0=/home/ed/netcdf-c/ncgen3/c0.cdl
++ ncgenc0=/home/ed/netcdf-c/ncgen/c0.cdl
++ ncgenc04=/home/ed/netcdf-c/ncgen/c0_4.cdl
++ cd /home/ed/netcdf-c/examples/C
+ echo '*** Running examples for netCDF-4.'
*** Running examples for netCDF-4.
+ set -e
+ echo '*** running simple_nc4 examples...'
*** running simple_nc4 examples...
+ /home/ed/netcdf-c/examples/C/simple_nc4_wr
/home/ed/netcdf-c/examples/C/.libs/simple_nc4_wr: symbol lookup error: /home/ed/netcdf-c/liblib/.libs/libnetcdf.so.19: undefined symbol: H5Pset_all_coll_metadata_ops

@WardF this certainly must be fixed before release. I will take a look today and come up with a PR.

I seem to remember something about H5Pset_all_coll_metadata_ops and HDF5-1.12.1 going by in some other PR or issue...

[edwardhartnett]

Seems like I've encoutered this before, and determined that it was just an artifact of an uncleaned previous build: #1516

I'm going to try again from scratch and see if I can reproduce this problem...

[edwardhartnett]

OK, with a fresh checkout and a clean build, no problem.

So I've got to remember, next time I see this, that I probably have built with parallel on top of a sequential build, without doing a clean. I will close this issue...