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[Dennis Schridde <1892420@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

```
hugin-2019.2.0/src/foreign/levmar/misc_core.c:45:#define GEMM LM_MK_BLAS_NAME(gemm)
```

This function is a BLAS function:
https://en.wikipedia.org/wiki/Basic_Linear_Algebra_Subprograms#Level_3

Thus, since levmar is built as a static library, Hugin itself should
call `find_package(BLAS)` and `huginbase` should link against
`BLAS_LIBRARIES`.

Attached patch fixes this (in an admittedly slightly crude way) for me.

** Affects: hugin
     Importance: Undecided
         Status: New

** Patch added: "hugin-2019.2-lapack-blas.patch"
   https://bugs.launchpad.net/bugs/1892420/+attachment/5403244/+files/hugin-2019.2-lapack-blas.patch

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https://bugs.launchpad.net/bugs/1892420

Title:
  levmar uses BLAS when built with LAPACK, but Hugin does not link
  against BLAS

Status in Hugin:
  New

Bug description:
  ```
  hugin-2019.2.0/src/foreign/levmar/misc_core.c:45:#define GEMM LM_MK_BLAS_NAME(gemm)
  ```

  This function is a BLAS function:
  https://en.wikipedia.org/wiki/Basic_Linear_Algebra_Subprograms#Level_3

  Thus, since levmar is built as a static library, Hugin itself should
  call `find_package(BLAS)` and `huginbase` should link against
  `BLAS_LIBRARIES`.

  Attached patch fixes this (in an admittedly slightly crude way) for
  me.

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