--- oct/Makefile_unix.orig	2022-05-24 15:55:33
+++ oct/Makefile_unix	2025-03-29 13:17:54
@@ -33,7 +33,7 @@
 FFTW_LIBS := $(shell $(MKOCTFILE) -p FFTW_LIBS)
 endif
 
-export CXXFLAGS := $(shell $(MKOCTFILE) -p CXXFLAGS) -std=gnu++11 -Wall -DLTFAT_LARGEARRAYS $(OPTCXXFLAGS)
+export CXXFLAGS := $(shell $(MKOCTFILE) -p CXXFLAGS) -std=gnu++17 -Wall -DLTFAT_LARGEARRAYS $(OPTCXXFLAGS)
 # export is necessary, otherwise LFLAGS won't have any effect
 # at least on Windows and on Mac
 export LDFLAGS := -L$(shell $(MKOCTFILE) -p LIBDIR) $(FLIBS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FFTW_LIBS)