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The software won't compile :

In file included from streamnet.cpp:46:
linklib.h: In function 'bool sendLink(int32_t, int)':
linklib.h:281:2: error: static assertion failed: MPI_Type_extent was removed in MPI-3.0.  Use MPI_Type_get_extent instead.
  281 |  MPI_Type_extent(MPI_LONG, &extent);
      |  ^~~~~~~~~~~~~~~
linklib.h:286:2: error: static assertion failed: MPI_Type_struct was removed in MPI-3.0.  Use MPI_Type_create_struct instead.
  286 |  MPI_Type_struct(2,blockcounts,offsets,oldtypes,&PointType);
      |  ^~~~~~~~~~~~~~~
linklib.h: In function 'bool recvLink(int)':
linklib.h:349:2: error: static assertion failed: MPI_Type_extent was removed in MPI-3.0.  Use MPI_Type_get_extent instead.
  349 |  MPI_Type_extent(MPI_LONG, &extent);
      |  ^~~~~~~~~~~~~~~
linklib.h:354:2: error: static assertion failed: MPI_Type_struct was removed in MPI-3.0.  Use MPI_Type_create_struct instead.
  354 |  MPI_Type_struct(2,blockcounts,offsets,oldtypes,&PointType);

taudem installs files to /usr/local, which it should not. Please modify the PKGBUILD such that it installs to /usr.

It creates the following at /usr/local:

/usr/local/
/usr/local/bin/
/usr/local/bin/aread8
/usr/local/bin/areadinf
/usr/local/bin/connectdown
/usr/local/bin/d8flowdir
/usr/local/bin/d8flowpathextremeup
/usr/local/bin/d8hdisttostrm
/usr/local/bin/dinfavalanche
/usr/local/bin/dinfconclimaccum
/usr/local/bin/dinfdecayaccum
/usr/local/bin/dinfdistdown
/usr/local/bin/dinfdistup
/usr/local/bin/dinfflowdir
/usr/local/bin/dinfrevaccum
/usr/local/bin/dinftranslimaccum
/usr/local/bin/dinfupdependence
/usr/local/bin/dropanalysis
/usr/local/bin/gagewatershed
/usr/local/bin/gridnet
/usr/local/bin/lengtharea
/usr/local/bin/moveoutletstostrm
/usr/local/bin/peukerdouglas
/usr/local/bin/pitremove
/usr/local/bin/slopearea
/usr/local/bin/slopearearatio
/usr/local/bin/slopeavedown
/usr/local/bin/streamnet
/usr/local/bin/threshold

@Alister.Hood I made the change. Thanks for the information since I did not know this option in PKGBUILD.

Sorry, I should have explained what I meant. It is possible to rename the source when it is downloaded, by using a syntax like this:

source="${pkgname}-${pkgver}.zip::https://github.com/rozos/TauDEM-QGIS/archive/master.zip"

@Alister.Hood I requested the author of TauDEM-QGIS create a release of TauDEM version 5.1.2[1], by now I solved the version download assigning the last commit.

[1] https://github.com/rozos/TauDEM-QGIS/issues/1

But please rename and version the source, for the sake of people using aur helpers ("master.zip" might clash with other software or other versions).

Please upload the new version to aur4.

Makepkg complains that files are missing and unzip should be a dependency if the build() uses it. TauDEM 5.1.2 is the latest version.