1 files changed, 2 insertions, 0 deletions

diff --git a/meta-oe/recipes-support/fftw/fftw_3.3.6.bb b/meta-oe/recipes-support/fftw/fftw_3.3.6.bb
index 5599851699..ed14e16586 100644
--- a/meta-oe/recipes-support/fftw/fftw_3.3.6.bb
+++ b/meta-oe/recipes-support/fftw/fftw_3.3.6.bb
@@ -19,6 +19,8 @@ PROVIDES = "fftwl fftwf"
 
 EXTRA_OECONF = "--disable-fortran --enable-shared --enable-threads"
 
+CFLAGS += "-D_GNU_SOURCE"
+
 FFTW_NEON = "${@bb.utils.contains('TUNE_FEATURES', 'neon', '--enable-neon', '', d)}"
 FFTW_NEON_class-native = ""