Use overlay ports to force x86 Windows to use clapack and openblas

overlayPorts/blas/blas.pc.in

@@ -0,0 +1,8 @@
+prefix=${pcfiledir}/../..
+
+Name: BLAS
+Description: Implementation of BLAS
+Version: 
+Requires: @requires@
+Libs: @libs@
+Cflags: @cflags@

overlayPorts/blas/portfile.cmake

@@ -0,0 +1,71 @@
+SET(VCPKG_POLICY_EMPTY_PACKAGE enabled)
+
+# Due to the interaction between BLAS and LAPACK, we need to choose implementations consistent with
+# each other.
+#
+# First, if we are on Apple, we use the Accelerate framework.
+#
+# Then, we prefer to use openblas and lapack-reference for blas and lapack, respectively, but
+# sometimes are unable.
+#
+# If we are on Windows and arm or uwp, that we use gfortran as our fortran compiler creates an issue
+# because there is no available libgfortran. This means ew can't use lapack-reference at all.
+#
+# If we are on Windows and static, there is a linking problem caused by static gfortran in the same
+# link as openblas, so we have to use the blas implementation from lapack-reference.
+#
+# That results in roughly the following decision tree:
+#
+# no_libgfortran = (uwp || windows)
+# can_link_mixed_static_libgfortran = !windows || !static
+#
+# if (no_libgfortran) {
+#    return {
+#        "blas": "openblas",
+#        "lapack": "clapack"
+#     };
+# } else if (can_link_mixed_static_libgfortran) {
+#     return {
+#         "blas": "openblas",
+#         "lapack": "lapack-reference[noblas]"
+#     };
+# } else {
+#     return {
+#         "blas": "lapack-reference[blas]",
+#         "lapack": "lapack-reference[blas]"
+#     };
+# }
+#
+# Scoping this to just the 'can use openblas' question, we get:
+# uwp || (windows && arm) || !windows || !static
+# and for lapack-reference[blas], the DeMorgan'd inverse of that:
+# !uwp && !(windows && arm) && windows && static
+
+if(VCPKG_TARGET_IS_OSX OR VCPKG_TARGET_IS_IOS)
+    # Use Apple's accelerate framework where available
+    set(BLA_VENDOR Apple)
+    set(requires "")
+    set(libs "-framework Accelerate")
+    set(cflags "-framework Accelerate")
+elseif(VCPKG_TARGET_IS_UWP
+        OR VCPKG_TARGET_IS_WINDOWS
+        OR NOT (VCPKG_LIBRARY_LINKAGE STREQUAL "static"))
+    set(BLA_VENDOR OpenBLAS)
+    set(requires openblas)
+else()
+    set(BLA_VENDOR Generic)
+    set(requires "blas-reference")
+endif()
+
+configure_file("${CMAKE_CURRENT_LIST_DIR}/blas.pc.in" "${CURRENT_PACKAGES_DIR}/lib/pkgconfig/blas.pc" @ONLY)
+if(NOT VCPKG_BUILD_TYPE)
+    configure_file("${CMAKE_CURRENT_LIST_DIR}/blas.pc.in" "${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig/blas.pc" @ONLY)
+endif()
+
+if(VCPKG_LIBRARY_LINKAGE STREQUAL "static")
+    set(BLA_STATIC ON)
+else()
+    set(BLA_STATIC OFF)
+endif()
+
+configure_file("${CMAKE_CURRENT_LIST_DIR}/vcpkg-cmake-wrapper.cmake.in" "${CURRENT_PACKAGES_DIR}/share/blas/vcpkg-cmake-wrapper.cmake" @ONLY)

overlayPorts/blas/vcpkg-cmake-wrapper.cmake.in

@@ -0,0 +1,9 @@
+# BLA_VENDOR and BLA_STATIC are documented at:
+# * https://cmake.org/cmake/help/latest/module/FindBLAS.html
+# * https://cmake.org/cmake/help/latest/module/FindLAPACK.html
+
+set(BLA_VENDOR @BLA_VENDOR@)
+set(BLA_STATIC @BLA_STATIC@)
+_find_package(${ARGS})
+unset(BLA_VENDOR)
+unset(BLA_STATIC)

overlayPorts/blas/vcpkg.json

@@ -0,0 +1,26 @@
+{
+  "$comment": "Keep the platform expressions in sync with the wrappers installed by the portfiles!",
+  "name": "blas",
+  "version-date": "2023-04-14",
+  "port-version": 1,
+  "description": "Metapackage for packages which provide BLAS",
+  "license": null,
+  "supports": "!(android & arm32) & !(android & x64)",
+  "dependencies": [
+    {
+      "name": "lapack-reference",
+      "features": [
+        "cblas"
+      ],
+      "platform": "!osx & !ios & !uwp & !windows & static"
+    },
+    {
+      "name": "openblas",
+      "platform": "!osx & !ios & (uwp | windows | !static)"
+    },
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    }
+  ]
+}

overlayPorts/lapack/lapack.pc.in

@@ -0,0 +1,9 @@
+prefix=${pcfiledir}/../..
+libdir=${prefix}/lib
+
+Name: LAPACK
+Description: Implementation of LAPACK
+Version: 
+Requires: @requires@
+Libs: @libs@
+Cflags: @cflags@

overlayPorts/lapack/portfile.cmake

@@ -0,0 +1,42 @@
+SET(VCPKG_POLICY_EMPTY_PACKAGE enabled)
+
+if(VCPKG_LIBRARY_LINKAGE STREQUAL "static")
+    set(BLA_STATIC ON)
+else()
+    set(BLA_STATIC OFF)
+endif()
+
+# See explanation of which lapack implementation is chosen in portfile.cmake in the blas port
+
+set(BLA_VENDOR Generic)
+set(installed_wrapper "${CURRENT_INSTALLED_DIR}/share/lapack/vcpkg-cmake-wrapper.cmake")
+set(installed_module "${CURRENT_INSTALLED_DIR}/share/lapack/FindLAPACK.cmake")
+if(VCPKG_TARGET_IS_OSX OR VCPKG_TARGET_IS_IOS)
+    # Use Apple's accelerate framework where available
+    set(BLA_VENDOR Apple)
+    configure_file("${CMAKE_CURRENT_LIST_DIR}/vcpkg-cmake-wrapper.cmake.in" "${CURRENT_PACKAGES_DIR}/share/lapack/vcpkg-cmake-wrapper.cmake" @ONLY)
+    set(libs "-framework Accelerate")
+    set(cflags "-framework Accelerate")
+    configure_file("${CMAKE_CURRENT_LIST_DIR}/lapack.pc.in" "${CURRENT_PACKAGES_DIR}/lib/pkgconfig/lapack.pc" @ONLY)
+    if(NOT VCPKG_BUILD_TYPE)
+        configure_file("${CMAKE_CURRENT_LIST_DIR}/lapack.pc.in" "${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig/lapack.pc" @ONLY)
+    endif()
+    unset(installed_module)
+elseif(VCPKG_TARGET_IS_UWP OR VCPKG_TARGET_IS_WINDOWS)
+    configure_file("${CURRENT_INSTALLED_DIR}/share/clapack/wrapper/vcpkg-cmake-wrapper.cmake" "${CURRENT_PACKAGES_DIR}/share/lapack/vcpkg-cmake-wrapper.cmake" COPYONLY)
+    configure_file("${CURRENT_INSTALLED_DIR}/share/clapack/FindLAPACK.cmake" "${CURRENT_PACKAGES_DIR}/share/lapack/FindLAPACK.cmake" COPYONLY)
+    set(libs "-llapack -llibf2c")
+    configure_file("${CMAKE_CURRENT_LIST_DIR}/lapack.pc.in" "${CURRENT_PACKAGES_DIR}/lib/pkgconfig/lapack.pc" @ONLY)
+    if(NOT VCPKG_BUILD_TYPE)
+        set(libs "-llapack -llibf2c")
+        configure_file("${CMAKE_CURRENT_LIST_DIR}/lapack.pc.in" "${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig/lapack.pc" @ONLY)
+    endif()
+else()
+    configure_file("${CURRENT_INSTALLED_DIR}/share/lapack-reference/wrapper/vcpkg-cmake-wrapper.cmake" "${CURRENT_PACKAGES_DIR}/share/lapack/vcpkg-cmake-wrapper.cmake" COPYONLY)
+    configure_file("${CURRENT_INSTALLED_DIR}/share/lapack-reference/FindLAPACK.cmake" "${CURRENT_PACKAGES_DIR}/share/lapack/FindLAPACK.cmake" COPYONLY)
+    set(requires "lapack-reference")
+    configure_file("${CMAKE_CURRENT_LIST_DIR}/lapack.pc.in" "${CURRENT_PACKAGES_DIR}/lib/pkgconfig/lapack.pc" @ONLY)
+    if(NOT VCPKG_BUILD_TYPE)
+        configure_file("${CMAKE_CURRENT_LIST_DIR}/lapack.pc.in" "${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig/lapack.pc" @ONLY)
+    endif()
+endif()

overlayPorts/lapack/vcpkg-cmake-wrapper.cmake.in

@@ -0,0 +1,15 @@
+# BLA_VENDOR and BLA_STATIC are documented at:
+# * https://cmake.org/cmake/help/latest/module/FindBLAS.html
+# * https://cmake.org/cmake/help/latest/module/FindLAPACK.html
+
+_find_package(BLAS) # Find BLAS before setting BLA_VENDOR (Will set/unset BLA_VENDOR itself)
+set(BLA_VENDOR @BLA_VENDOR@)
+if(APPLE AND "@BLA_STATIC@" AND CMAKE_VERSION VERSION_LESS "3.17.0")
+    # avoid `-Wl,--(start|end)-group` and wrong lib suffix
+    set(BLA_STATIC 0) 
+else()
+    set(BLA_STATIC @BLA_STATIC@)
+endif()
+_find_package(${ARGS})
+unset(BLA_VENDOR)
+unset(BLA_STATIC)

overlayPorts/lapack/vcpkg.json

@@ -0,0 +1,23 @@
+{
+  "$comment": "Keep the platform expressions in sync with the wrappers installed by the portfiles!",
+  "name": "lapack",
+  "version-date": "2023-06-10",
+  "port-version": 2,
+  "description": "Metapackage for packages which provide LAPACK",
+  "license": null,
+  "supports": "!android",
+  "dependencies": [
+    {
+      "name": "clapack",
+      "platform": "uwp | windows"
+    },
+    {
+      "name": "lapack-reference",
+      "platform": "!osx & !ios & !uwp & !windows"
+    },
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    }
+  ]
+}

publish.gradle

@@ -109,7 +109,7 @@ ext.addTaskToCopyAllOutputs = { task ->
 }
 
 task buildVcpkg(type: Exec) {
-    def baseArgs = ['install']
+    def baseArgs = ['install', "--overlay-ports=$rootDir/overlayPorts"]
     outputs.dir "vcpkg_installed/$triplet"
     executable "$rootDir/vcpkg/vcpkg"
     args baseArgs + "--triplet=$triplet"