diff --git a/math/fxt/Makefile b/math/fxt/Makefile
index e11e9d6b2eb3..c41765821dc9 100644
--- a/math/fxt/Makefile
+++ b/math/fxt/Makefile
@@ -1,25 +1,26 @@
 PORTNAME=	fxt
-PORTVERSION=	2023.06.27
+PORTVERSION=	2023.10.26
 CATEGORIES=	math
 MASTER_SITES=	https://www.jjj.de/fxt/
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Llibrary of low-level algorithms
 WWW=		https://www.jjj.de/fxt/
 
 LICENSE=	GPLv3+
 LICENSE_FILE=	${WRKSRC}/COPYING.txt
 
 USES=		compiler:c++11-lang gmake
 
 MAKE_ENV=	FXT_INSTALL="${INSTALL_DATA}"
 MAKEFILE=	makefile
+USE_CXXSTD=	c++11
 WRKSRC=		${WRKDIR}/fxt
 
 OPTIONS_DEFINE=	EXAMPLES
 
 post-install-EXAMPLES-on:
 	${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	cd ${WRKSRC}/demo && ${COPYTREE_SHARE} . ${STAGEDIR}${EXAMPLESDIR}
 
 .include <bsd.port.mk>
diff --git a/math/fxt/distinfo b/math/fxt/distinfo
index f1186027ba85..82e1d0586c81 100644
--- a/math/fxt/distinfo
+++ b/math/fxt/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1688166066
-SHA256 (fxt-2023.06.27.tar.gz) = 2a63ea4d4d01d64177b11edde699ce9348cf8ad923f2c4a0111dd9b1395d4df7
-SIZE (fxt-2023.06.27.tar.gz) = 1854788
+TIMESTAMP = 1698340927
+SHA256 (fxt-2023.10.26.tar.gz) = 121a54fdab9fd68ef75de811ba20740431979532fc551c2dd72e3f45f60e6bfa
+SIZE (fxt-2023.10.26.tar.gz) = 1854920
diff --git a/math/fxt/files/patch-makefile b/math/fxt/files/patch-makefile
index ed412ac3f861..54801d4c0521 100644
--- a/math/fxt/files/patch-makefile
+++ b/math/fxt/files/patch-makefile
@@ -1,79 +1,55 @@
---- makefile.orig	2021-04-06 13:42:27 UTC
+--- makefile.orig	2023-10-20 14:17:07 UTC
 +++ makefile
 @@ -8,22 +8,22 @@ PROJ=fxt
  include flags.mk
  
  #### choose the FLAG combo here:
 -FXT_CXXFLAGS=
 +#FXT_CXXFLAGS=
  #FXT_CXXFLAGS += -std=c++11
 -FXT_CXXFLAGS += -std=c++17
 -FXT_CXXFLAGS += -pipe
 +#FXT_CXXFLAGS += -std=c++17
 +#FXT_CXXFLAGS += -pipe
  #FXT_CXXFLAGS += -fno-exceptions
 -FXT_CXXFLAGS += $(OFLAGS) # uncomment for OPTIMIZATION
 +#FXT_CXXFLAGS += $(OFLAGS) # uncomment for OPTIMIZATION
  #FXT_CXXFLAGS += -O3 # test -O3
- #FXT_CXXFLAGS += $(GFLAGS) # uncomment for DEBUGGING
+-FXT_CXXFLAGS += $(GFLAGS) # uncomment for DEBUGGING
++#FXT_CXXFLAGS += $(GFLAGS) # uncomment for DEBUGGING
  #FXT_CXXFLAGS += $(PFLAGS) # uncomment for PROFILING
  #
 -FXT_CXXFLAGS += $(WFLAGS) # uncomment for WARNINGS
 +#FXT_CXXFLAGS += $(WFLAGS) # uncomment for WARNINGS
  #FXT_CXXFLAGS += -Werror # make all warnings ERRORS
  #FXT_CXXFLAGS += -fmax-errors=1 # clang chokes on this one
  
  #FXT_CXXFLAGS += -D__NO_MATH_INLINES
 -FXT_CXXFLAGS += $(FXT_EXTRA_FLAGS)
 +#FXT_CXXFLAGS += $(FXT_EXTRA_FLAGS)
  
  #FXT_CXXFLAGS += $(CLANG_FLAGS)  ## for clang++
  
-@@ -200,27 +200,27 @@ install: lib
+@@ -199,15 +199,15 @@ INCDIR=$(PREFIX)/include/fxt
+ .PHONY: install  ## install to $(PREFIX)/lib/ and $(PREFIX)/include/fxt/
+ install: lib
  	: '[$@]'
- 	@echo 'PREFIX=$(PREFIX)  LIBDIR=$(LIBDIR)  INCDIR=$(INCDIR)'
+-	@echo 'PREFIX=$(PREFIX)  LIBDIR=$(LIBDIR)  INCDIR=$(INCDIR)'
++	@echo 'PREFIX=$(PREFIX)  LIBDIR=$(LIBDIR)  INCDIR=$(DESTDIR)$(INCDIR)'
  	@:
 -	@test -d $(INCDIR)  ||  mkdir $(INCDIR)
 -	@$(FXT_INSTALL) $(FXTIDIR)/*.h $(INCDIR)/
 -	@cd src && for f in $(SHFXTSRCDIRS); do mkdir -p $(INCDIR)/$$f; done
 -	@cd src && for f in $(SHFXTSRCDIRS); do $(FXT_INSTALL) $$f/*.h $(INCDIR)/$$f; done
 +	@test -d $(DESTDIR)$(INCDIR)  ||  mkdir $(DESTDIR)$(INCDIR)
 +	@$(FXT_INSTALL) $(FXTIDIR)/*.h $(DESTDIR)$(INCDIR)/
 +	@cd src && for f in $(SHFXTSRCDIRS); do mkdir -p $(DESTDIR)$(INCDIR)/$$f; done
 +	@cd src && for f in $(SHFXTSRCDIRS); do $(FXT_INSTALL) $$f/*.h $(DESTDIR)$(INCDIR)/$$f; done
  	@:
 -	@test -d $(LIBDIR)  ||  mkdir $(LIBDIR)
 -	@$(FXT_INSTALL) $(FXTLIB) $(LIBDIR)/
 +	@test -d $(DESTDIR)$(LIBDIR)  ||  mkdir $(DESTDIR)$(LIBDIR)
 +	@$(FXT_INSTALL) $(FXTLIB) $(DESTDIR)$(LIBDIR)/
  	: '[$@ OK]'
  
  .PHONY: chk-install ##x print whether installed header files are up to date
- chk-install:
- 	@(cd src  &&  find . -maxdepth 2 -name \*.h | sort) > tmp-hdr1
--	@(cd $(INCDIR)/  &&  find . -name \*.h | sort) > tmp-hdr2
-+	@(cd $(DESTDIR)$(INCDIR)/  &&  find . -name \*.h | sort) > tmp-hdr2
- 	@-diff tmp-hdr1 tmp-hdr2
- 	@rm tmp-hdr1 tmp-hdr2
- 
--.PHONY: uninstall  ## uninstall headers and lib, but leave directory $(INCDIR)
-+.PHONY: uninstall  ## uninstall headers and lib, but leave directory $(DESTDIR)$(INCDIR)
- uninstall:
--	: '[$@]'  ## note: we do not remove $(INCDIR)
--	rm -rf $(INCDIR)/*
--	rm -f $(LIBDIR)/$(FXTLIB)
-+	: '[$@]'  ## note: we do not remove $(DESTDIR)$(INCDIR)
-+	rm -rf $(DESTDIR)$(INCDIR)/*
-+	rm -f $(DESTDIR)$(LIBDIR)/$(FXTLIB)
- 
- .PHONY: reinstall  ## uninstall and install
- reinstall: # uninstall install
-@@ -785,7 +785,7 @@ showsrc:
- #	@for h in */*.h; do \
- # grep -L $$h depend.mk &>/dev/null || echo $$h ; done
- #
--##	@for h in $$(ls -1 $(INCDIR) ); do \
-+##	@for h in $$(ls -1 $(DESTDIR)$(INCDIR) ); do \
- 
- #.PHONY: shownotes ##x show comments that contain the string "note"
- #shownotes: