From 97101d4bd500d3784f3cd9524dbdaa1ef45978d3 Mon Sep 17 00:00:00 2001
From: Robert Schumacher <roschuma@microsoft.com>
Date: Sat, 25 Nov 2017 17:06:51 -0800
Subject: [fftw3] Detect stale sources

---
 ports/fftw3/portfile.cmake | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/ports/fftw3/portfile.cmake b/ports/fftw3/portfile.cmake
index 973cf7dbe..317046635 100644
--- a/ports/fftw3/portfile.cmake
+++ b/ports/fftw3/portfile.cmake
@@ -1,5 +1,14 @@
 include(vcpkg_common_functions)
 set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/fftw-3.3.7)
+
+# This can be removed in the next source code update
+if(EXISTS "${SOURCE_PATH}/CMakeLists.txt")
+    file(READ "${SOURCE_PATH}/CMakeLists.txt" _contents)
+    if("${_contents}" MATCHES "-D_OPENMP -DLIBFFTWF33_EXPORTS /openmp /bigobj")
+        file(REMOVE_RECURSE ${CURRENT_BUILDTREES_DIR}/src)
+    endif()
+endif()
+
 vcpkg_download_distfile(ARCHIVE
     URLS "http://www.fftw.org/fftw-3.3.7.tar.gz"
     FILENAME "fftw-3.3.7.tar.gz"
-- 
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