arpack: Fix running parallel tests

By default, the mpiexec executable is not on the PATH after installing
MSMPI on Windows.

Change the check rules to point to the default installation location of that
executable.

mingw-w64-arpack/0001-parallel-tests.patch

@@ -0,0 +1,35 @@
+--- arpack-ng-3.9.1/CMakeLists.txt.orig	2023-10-14 13:55:37.000000000 +0200
++++ arpack-ng-3.9.1/CMakeLists.txt	2025-11-26 11:01:34.458510600 +0100
+@@ -72,7 +72,7 @@
+         get_filename_component(lwe ${l} NAME_WE)
+         add_executable(${lwe} ${parpackexample_DIR}/${l} )
+         target_link_libraries(${lwe} parpack arpack MPI::MPI_Fortran)
+-        add_test(NAME "${lwe}_ex" COMMAND mpiexec -n 2 ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${lwe})
++        add_test(NAME "${lwe}_ex" COMMAND ${MPIEXEC_EXECUTABLE} -n 2 ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${lwe})
+     endforeach()
+ endfunction(pexamples)
+ 
+@@ -674,7 +674,7 @@
+ 
+     add_executable(issue46 PARPACK/TESTS/MPI/issue46.f)
+     target_link_libraries(issue46 parpack arpack BLAS::BLAS LAPACK::LAPACK ${EXTRA_LDFLAGS})
+-    add_test(issue46_tst mpiexec -n 2 ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/issue46)
++    add_test(issue46_tst ${MPIEXEC_EXECUTABLE} -n 2 ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/issue46)
+   endif()
+ 
+   if(ICB)
+@@ -783,12 +783,12 @@
+       add_executable(icb_parpack_c PARPACK/TESTS/MPI/icb_parpack_c.c)
+       target_include_directories(icb_parpack_c PUBLIC ${PROJECT_SOURCE_DIR}/ICB MPI::MPI_C) # Get parpack.h mpi.h
+       target_link_libraries(icb_parpack_c parpack arpack BLAS::BLAS LAPACK::LAPACK ${EXTRA_LDFLAGS} MPI::MPI_C)
+-      add_test(icb_parpack_c_tst mpiexec -n 2 ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/icb_parpack_c)
++      add_test(icb_parpack_c_tst ${MPIEXEC_EXECUTABLE} -n 2 ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/icb_parpack_c)
+ 
+       add_executable(icb_parpack_cpp PARPACK/TESTS/MPI/icb_parpack_cpp.cpp)
+       target_include_directories(icb_parpack_cpp PUBLIC ${PROJECT_SOURCE_DIR}/ICB MPI::MPI_CXX) # Get parpack.hpp mpi.h
+       target_link_libraries(icb_parpack_cpp parpack arpack BLAS::BLAS LAPACK::LAPACK ${EXTRA_LDFLAGS} MPI::MPI_CXX)
+-      add_test(icb_parpack_cpp_tst mpiexec -n 2 ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/icb_parpack_cpp)
++      add_test(icb_parpack_cpp_tst ${MPIEXEC_EXECUTABLE} -n 2 ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/icb_parpack_cpp)
+     endif()
+   endif()
+ endfunction(build_tests)

mingw-w64-arpack/PKGBUILD

@@ -10,7 +10,7 @@ pkgname=("${MINGW_PACKAGE_PREFIX}-${_realname}"
          $([[ "${CARCH}" == "i686" ]] || echo "${MINGW_PACKAGE_PREFIX}-${_realname}64")
          $([[ "${CARCH}" != "x86_64" ]] || echo "${MINGW_PACKAGE_PREFIX}-p${_realname}"))
 pkgver=3.9.1
-pkgrel=5
+pkgrel=6
 arch=('any')
 mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clangarm64')
 pkgdesc="Fortran77 subroutines designed to solve large scale eigenvalue problems (mingw-w64)"
@@ -25,8 +25,10 @@ makedepends=("${MINGW_PACKAGE_PREFIX}-fc"
              $([[ "${CARCH}" == "i686" ]] || echo "${MINGW_PACKAGE_PREFIX}-openblas64"))
 provides=("${MINGW_PACKAGE_PREFIX}-${_realname}-ng")
 options=('!buildflags')
-source=(https://github.com/opencollab/arpack-ng/archive/${pkgver}/${_realname}-${pkgver}.tar.gz)
-sha256sums=('f6641deb07fa69165b7815de9008af3ea47eb39b2bb97521fbf74c97aba6e844')
+source=(https://github.com/opencollab/arpack-ng/archive/${pkgver}/${_realname}-${pkgver}.tar.gz
+        0001-parallel-tests.patch)
+sha256sums=('f6641deb07fa69165b7815de9008af3ea47eb39b2bb97521fbf74c97aba6e844'
+            '8bf923fb87d51bb313fc154d070941b932e74d6b7094e699fa84da6a913e3817')
 
 # Helper macros to help make tasks easier #
 apply_patch_with_msg() {
@@ -37,6 +39,13 @@ apply_patch_with_msg() {
   done
 }
 
+prepare() {
+  cd "${_realname}-ng-${pkgver}"
+
+  apply_patch_with_msg \
+    0001-parallel-tests.patch
+}
+
 _build_arpack() {
   _idx_opt=$1
 
@@ -90,26 +99,47 @@ build() {
 }
 
 check() {
+  # This is the default installation location for Microsoft MPI.
+  # It might need to be adjusted dependent on the system where the tests are run.
+  MSMPI_BIN="/c/Program Files/Microsoft MPI/Bin"
+  #: ${MSMPI_BIN:="/c/Program Files/Microsoft MPI/Bin"}
+
   cd "${srcdir}/build-${MSYSTEM}-static-32"
   msg2 "Static check with 32-bit indexing"
-  ${MINGW_PREFIX}/bin/cmake -DTESTS=ON ../${_realname}-ng-${pkgver}
-  ${MINGW_PREFIX}/bin/cmake --build . --target test || true
+  ${MINGW_PREFIX}/bin/cmake \
+    -DTESTS=ON \
+    -DMPIEXEC_EXECUTABLE="${MSMPI_BIN}/mpiexec.exe" \
+    ../${_realname}-ng-${pkgver}
+  ${MINGW_PREFIX}/bin/cmake --build .
+  ${MINGW_PREFIX}/bin/ctest .
 
   cd "${srcdir}/build-${MSYSTEM}-shared-32"
   msg2 "Shared check with 32-bit indexing"
-  ${MINGW_PREFIX}/bin/cmake -DTESTS=ON ../${_realname}-ng-${pkgver}
-  ${MINGW_PREFIX}/bin/cmake --build . --target test || true
+  ${MINGW_PREFIX}/bin/cmake \
+    -DTESTS=ON \
+    -DMPIEXEC_EXECUTABLE="${MSMPI_BIN}/mpiexec.exe" \
+    ../${_realname}-ng-${pkgver}
+  ${MINGW_PREFIX}/bin/cmake --build .
+  ${MINGW_PREFIX}/bin/ctest .
 
   if [ "${CARCH}" != "i686" ]; then
     cd "${srcdir}/build-${MSYSTEM}-static-64"
     msg2 "Static check with 64-bit indexing"
-    ${MINGW_PREFIX}/bin/cmake -DTESTS=ON ../${_realname}-ng-${pkgver}
-    ${MINGW_PREFIX}/bin/cmake --build . --target test || true
+    ${MINGW_PREFIX}/bin/cmake \
+      -DTESTS=ON \
+      -DMPIEXEC_EXECUTABLE="${MSMPI_BIN}/mpiexec.exe" \
+      ../${_realname}-ng-${pkgver}
+    ${MINGW_PREFIX}/bin/cmake --build .
+    ${MINGW_PREFIX}/bin/ctest .
 
     cd "${srcdir}/build-${MSYSTEM}-shared-64"
     msg2 "Shared check with 64-bit indexing"
-    ${MINGW_PREFIX}/bin/cmake -DTESTS=ON ../${_realname}-ng-${pkgver}
-    ${MINGW_PREFIX}/bin/cmake --build . --target test || true
+    ${MINGW_PREFIX}/bin/cmake \
+      -DTESTS=ON \
+      -DMPIEXEC_EXECUTABLE="${MSMPI_BIN}/mpiexec.exe" \
+      ../${_realname}-ng-${pkgver}
+    ${MINGW_PREFIX}/bin/cmake --build .
+    ${MINGW_PREFIX}/bin/ctest .
   fi
 }