fix find_package for fftw3 and add arch features

ports/fftw3/CONTROL

@@ -1,6 +1,21 @@
 Source: fftw3
-Version: 3.3.8
+Version: 3.3.8-2
 Description: FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data (as well as of even/odd data, i.e. the discrete cosine/sine transforms or DCT/DST).
 
 Feature: openmp
-Description: Builds openmp enabled lib
+Description: Builds openmp enabled lib
+
+Feature: sse
+Description: Builds part of the library with sse
+
+Feature: sse2
+Description: Builds part of the library with sse2, sse
+
+Feature: avx
+Description: Builds part of the library with avx, sse2, sse
+
+Feature: avx2
+Description: Builds part of the library with avx2, fma, avx, sse2, sse
+
+Feature: threads
+Description: Enable threads in fftw3

ports/fftw3/fftw3_arch_fix.patch

@@ -0,0 +1,23 @@
+diff --git a/CMakeLists - Kopie.txt b/CMakeLists.txt
+index 95bd537a..245acc8f 100644
+--- a/CMakeLists - Kopie.txt	
++++ b/CMakeLists.txt
+@@ -131,6 +131,7 @@ endif ()
+
+ include (CheckCCompilerFlag)
+
++#All those checks fail due to linkage errors so we directly set HAVE_<ARCH> in the PORTFILE! We assume the user knows what (s)he is doing!
+ if (ENABLE_SSE)
+   foreach (FLAG "-msse" "/arch:SSE")
+     unset (HAVE_SSE CACHE)
+@@ -176,8 +177,9 @@ if (ENABLE_AVX2)
+ endif ()
+
+ # AVX2 codelets require FMA support as well
++# AVX2 implicitly includes FMA using Visual Studio (also definition __FMA__ is not set)
+ if (ENABLE_AVX2)
+-  foreach (FLAG "-mfma" "/arch:FMA")
++  foreach (FLAG "-mfma" "/arch:AVX2")
+     unset (HAVE_FMA CACHE)
+     check_c_compiler_flag (${FLAG} HAVE_FMA)
+     if (HAVE_FMA)

ports/fftw3/patch_targets.patch

@@ -0,0 +1,41 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 335808a..90772b4 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -358,7 +358,7 @@ foreach(subtarget ${subtargets})
+           ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+ endforeach ()
+ install(TARGETS ${fftw3_lib}
+-          EXPORT FFTW3LibraryDepends
++          EXPORT FFTW3${PREC_SUFFIX}LibraryDepends
+           RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+           LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+           ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+@@ -419,11 +419,11 @@ configure_file (FFTW3ConfigVersion.cmake.in FFTW3${PREC_SUFFIX}ConfigVersion.cma
+ install (FILES
+           ${CMAKE_CURRENT_BINARY_DIR}/FFTW3${PREC_SUFFIX}Config.cmake
+           ${CMAKE_CURRENT_BINARY_DIR}/FFTW3${PREC_SUFFIX}ConfigVersion.cmake
+-	  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/fftw3${PREC_SUFFIX}
++	  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake
+          COMPONENT Development)
+
+-export (TARGETS ${fftw3_lib} NAMESPACE FFTW3:: FILE ${PROJECT_BINARY_DIR}/FFTW3LibraryDepends.cmake)
+-install(EXPORT FFTW3LibraryDepends
++export (TARGETS ${fftw3_lib} NAMESPACE FFTW3:: FILE ${PROJECT_BINARY_DIR}/FFTW3${PREC_SUFFIX}LibraryDepends.cmake)
++install(EXPORT FFTW3${PREC_SUFFIX}LibraryDepends
+         NAMESPACE FFTW3::
+-        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/fftw3${PREC_SUFFIX}
++        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake
+         COMPONENT Development)
+--- a/FFTW3Config.cmake.in
++++ b/FFTW3Config.cmake.in
+@@ -10,7 +10,7 @@ set (FFTW3@PREC_SUFFIX@_LIBRARIES fftw3@PREC_SUFFIX@)
+ set (FFTW3@PREC_SUFFIX@_LIBRARY_DIRS @CMAKE_INSTALL_FULL_LIBDIR@)
+ set (FFTW3@PREC_SUFFIX@_INCLUDE_DIRS @CMAKE_INSTALL_FULL_INCLUDEDIR@)
+
+-include ("${CMAKE_CURRENT_LIST_DIR}/FFTW3LibraryDepends.cmake")
++include ("${CMAKE_CURRENT_LIST_DIR}/FFTW3@PREC_SUFFIX@LibraryDepends.cmake")
+
+ if (CMAKE_VERSION VERSION_LESS 2.8.3)
+   set (CMAKE_CURRENT_LIST_DIR)
+

ports/fftw3/portfile.cmake

@@ -21,6 +21,8 @@ vcpkg_apply_patches(
     SOURCE_PATH ${SOURCE_PATH}
     PATCHES
         ${CMAKE_CURRENT_LIST_DIR}/omp_test.patch
+        ${CMAKE_CURRENT_LIST_DIR}/patch_targets.patch
+        ${CMAKE_CURRENT_LIST_DIR}/fftw3_arch_fix.patch
 )
 
 if ("openmp" IN_LIST FEATURES)
@@ -29,34 +31,88 @@ else()
     set(ENABLE_OPENMP OFF)
 endif()
 
+if ("avx" IN_LIST FEATURES)
+    set(HAVE_AVX ON)
+    set(HAVE_SSE ON)
+    set(HAVE_SSE2 ON)
+else()
+    set(HAVE_AVX OFF)
+endif()
+
+if ("avx2" IN_LIST FEATURES)
+    set(HAVE_AVX2 ON)
+    set(HAVE_FMA ON)
+    set(HAVE_SSE ON)
+    set(HAVE_SSE2 ON)
+else()
+    set(HAVE_AVX2 OFF)
+    set(HAVE_FMA OFF)
+endif()
+
+if ("sse" IN_LIST FEATURES)
+    set(HAVE_SSE ON)
+else()
+    set(HAVE_SSE OFF)
+endif()
+
+if ("sse2" IN_LIST FEATURES)
+    set(HAVE_SSE2 ON)
+    set(HAVE_SSE ON)
+else()
+    set(HAVE_SSE2 OFF)
+endif()
+
+if ("threads" IN_LIST FEATURES)
+    set(HAVE_THREADS ON)
+else()
+    set(HAVE_THREADS OFF)
+endif()
+
 foreach(PRECISION ENABLE_DEFAULT_PRECISION ENABLE_FLOAT ENABLE_LONG_DOUBLE)
-	vcpkg_configure_cmake(
-		SOURCE_PATH ${SOURCE_PATH}
-		PREFER_NINJA
-		OPTIONS 
-			-D${PRECISION}=ON
-			-DENABLE_OPENMP=${ENABLE_OPENMP}
-	)
-
-	vcpkg_install_cmake()
-	vcpkg_copy_pdbs()
-
-	file(COPY ${SOURCE_PATH}/api/fftw3.h DESTINATION ${CURRENT_PACKAGES_DIR}/include)
-
-	vcpkg_fixup_cmake_targets(CONFIG_PATH lib/cmake)
-
-	if (VCPKG_CRT_LINKAGE STREQUAL dynamic)
-		vcpkg_apply_patches(
-			   SOURCE_PATH ${CURRENT_PACKAGES_DIR}/include
-			   PATCHES
-					   ${CMAKE_CURRENT_LIST_DIR}/fix-dynamic.patch)
-	endif()
-
-	# Cleanup
-	file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
-	file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/share)
+    if(${PRECISION} MATCHES "ENABLE_LONG_DOUBLE")
+        vcpkg_configure_cmake(
+        SOURCE_PATH ${SOURCE_PATH}
+        PREFER_NINJA
+        OPTIONS 
+            -D${PRECISION}=ON
+            -DENABLE_OPENMP=${ENABLE_OPENMP}
+            -DENABLE_THREADS=${HAVE_THREADS}
+        )
+    else()
+        vcpkg_configure_cmake(
+        SOURCE_PATH ${SOURCE_PATH}
+        PREFER_NINJA
+        OPTIONS 
+            -D${PRECISION}=ON
+            -DENABLE_OPENMP=${ENABLE_OPENMP}
+            -DHAVE_SSE=${HAVE_SSE}
+            -DHAVE_SSE2=${HAVE_SSE2}
+            -DHAVE_AVX=${HAVE_AVX}
+            -DHAVE_AVX2=${HAVE_AVX2}
+            -DHAVE_FMA=${HAVE_FMA}
+            -DENABLE_THREADS=${HAVE_THREADS}
+        )
+    endif()
+
+    vcpkg_install_cmake()
+    vcpkg_copy_pdbs()
+
+    file(COPY ${SOURCE_PATH}/api/fftw3.h DESTINATION ${CURRENT_PACKAGES_DIR}/include)
+
+    vcpkg_fixup_cmake_targets(CONFIG_PATH lib/cmake)
+
+    if (VCPKG_CRT_LINKAGE STREQUAL dynamic)
+        vcpkg_apply_patches(
+               SOURCE_PATH ${CURRENT_PACKAGES_DIR}/include
+               PATCHES
+                       ${CMAKE_CURRENT_LIST_DIR}/fix-dynamic.patch)
+    endif()
+
+    # Cleanup
+    file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+    file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/share)
 endforeach()
-	
+
 # Handle copyright
 file(COPY ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/fftw3)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/fftw3/COPYING ${CURRENT_PACKAGES_DIR}/share/fftw3/copyright)