From 09b4c8f7a32c044d1eb1701acef6d1b5aba3a080 Mon Sep 17 00:00:00 2001
From: Carles Fernandez <carles.fernandez@gmail.com>
Date: Sun, 4 Apr 2021 11:24:55 +0200
Subject: [PATCH] Fix bug in searching for gr-iio when CMake is re-run several
 times (fixes #491)

---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ba6a67356..f85d03a81 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2901,6 +2901,10 @@ if(GNURADIO_IIO_FOUND)
     set(GR_IIO_INCLUDE_HAS_GNURADIO TRUE)
     set(GNURADIO_API_IIO TRUE)
 else()
+    # Force to always search for gr-iio
+    unset(GRIIO_FOUND CACHE)
+    unset(IIO_INCLUDE_DIRS CACHE)
+    unset(IIO_LIBRARIES CACHE)
     find_package(GRIIO)
     set_package_properties(GRIIO PROPERTIES
         PURPOSE "Used for communication with PlutoSDR and FMCOMMS devices."