diff --git a/audio/cardinal/Makefile b/audio/cardinal/Makefile
index af5f8eef5009..a13cf42fc3ba 100644
--- a/audio/cardinal/Makefile
+++ b/audio/cardinal/Makefile
@@ -1,72 +1,88 @@
 # CAVEAT cross-compilation (ex. CPUTYPE=znver3) fails, upstream needs to fix this: https://github.com/DISTRHO/Cardinal/issues/646
 
 PORTNAME=	cardinal
 DISTVERSION=	26.02
 PORTREVISION=	1
 CATEGORIES=	audio
 MASTER_SITES=	https://github.com/DISTRHO/Cardinal/releases/download/${DISTVERSION}/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Plugin wrapper around VCV Rack
 WWW=		https://cardinal.kx.studio/ \
 		https://github.com/DISTRHO/Cardinal
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BROKEN_armv7=	compilation fails due to the variable name conflict with base header, see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=279134
 
 BUILD_DEPENDS=	${LOCALBASE}/include/FuzzySearchDatabase.hpp:textproc/fuzzysearchdatabase \
 		bash:shells/bash \
 		cmake:devel/cmake-core
 LIB_DEPENDS=	libasound.so:audio/alsa-lib \
 		libdbus-1.so:devel/dbus \
 		libfftw3f.so:math/fftw3-float \
 		libjansson.so:devel/jansson \
 		liblo.so:audio/liblo \
 		libpffft.so:math/pffft \
 		libpulse-simple.so:audio/pulseaudio \
 		libsamplerate.so:audio/libsamplerate \
 		libsndfile.so:audio/libsndfile \
 		libspeexdsp.so:audio/speexdsp
 RUN_DEPENDS=	xdg-desktop-portal>0:deskutils/xdg-desktop-portal
 
 USES=		compiler:c++17-lang gl gmake libarchive localbase:ldflags pkgconfig python sdl shebangfix tar:xz xorg
 USE_XORG=	x11 xcursor xext xrandr
 USE_GL=		gl
 USE_SDL=	sdl2
+USE_CXXSTD=	c++14 # keep std::random_shuffle that was removed in c++17, see https://github.com/DISTRHO/Cardinal/issues/945
 
 SHEBANG_GLOB=	*.sh
 
 CXXFLAGS+=	-I${LOCALBASE}/include/pffft
+CXXFLAGS+=	-Wno-error=missing-template-arg-list-after-template-kw # workaround for surgext/src/VCO.cpp:1051:28: error: a template argument list is expected after a name prefixed by the template keyword [-Wmissing-template-arg-list-after-template-kw]
 CXXFLAGS_powerpc64le=	-DNO_WARN_X86_INTRINSICS
 LDFLAGS+=	-lpffft -lexecinfo
 
 #MAKE_ENV=	LD_PRELOAD=/usr/lib/libpthread.so # workaround for https://github.com/DISTRHO/Cardinal/issues/128#issuecomment-1030817359
 MAKE_ARGS=	SYSDEPS=true
 
 BINARY_ALIAS=	gcc-ar=ar \
 		python3=${PYTHON_CMD}
 
 OPTIONS_DEFINE=		DOCS LIBLO LTO
 OPTIONS_DEFAULT=	#LIBLO LTO
 
 PORTDOCS=		*
 
 LIBLO_DESC=		Support Open Sound Control protocol through liblo
 LIBLO_MAKE_ARGS=	WITH_LTO=true
 LIBLO_MAKE_ARGS_OFF=	WITH_LTO=false
 LIBLO_LIB_DEPENDS=	liblo.so:audio/liblo
 LIBLO_BROKEN=		fails to build with liblo, see https://github.com/DISTRHO/Cardinal/issues/641
 
 LTO_MAKE_ARGS=		WITH_LTO=true
 LTO_BROKEN=		Fails to build with LTO because it is gcc-centered
 
-.include <bsd.port.options.mk>
-
-# workaround for ld: error: undefined symbol: roundevenf
-.if ${OPSYS} == FreeBSD
-USES+=	llvm:max=15
-.endif
+LDFLAGS+=		-Wl,--allow-multiple-definition # for roundevenf fix below: multipl binaries are built with multiple modules, so we add roundevenf and alow multiple definitions of it
+
+post-patch:
+	# inject definition of missing function roundevenf, see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=298503
+	@cd ${WRKSRC} && \
+		for f in \
+			plugins/ZZC/src/FN.cpp \
+			plugins/Fundamental/src/LFO.cpp \
+			plugins/Biset/src/Igc/Igc.cpp \
+			plugins/ML_modules/src/Quant.cpp \
+			plugins/HetrickCV/src/Bitshift.cpp \
+			plugins/Venom/src/XM_OP.cpp \
+			plugins/Venom/src/PolyOffset.cpp \
+			plugins/MindMeldModular/src/EqMaster/EqMaster.cpp \
+			plugins/AnimatedCircuits/src/Folding/Folding.cpp \
+			plugins/AnimatedCircuits/src/LFold/LFold.cpp \
+			plugins/dBiz/src/Bench.cpp \
+		; do \
+			cat ${FILESDIR}/roundevenf-definition.c $$f > $$f.tmp && mv $$f.tmp $$f; \
+		done
 
 .include <bsd.port.mk>
diff --git a/audio/cardinal/files/patch-plugins_MindMeldModular_src_ShapeMaster_Shape.hpp b/audio/cardinal/files/patch-plugins_MindMeldModular_src_ShapeMaster_Shape.hpp
new file mode 100644
index 000000000000..b8b1403d2335
--- /dev/null
+++ b/audio/cardinal/files/patch-plugins_MindMeldModular_src_ShapeMaster_Shape.hpp
@@ -0,0 +1,13 @@
+-- fix C++ compilation failure
+
+--- plugins/MindMeldModular/src/ShapeMaster/Shape.hpp.orig	2026-09-14 19:57:15 UTC
++++ plugins/MindMeldModular/src/ShapeMaster/Shape.hpp
+@@ -157,7 +157,7 @@ class Shape {	
+ 	T calcY(int p, T _x) {
+ 		// _x is relative to points[p].x
+ 		// do not call on last point
+-		T dx = std::abs<T>((T)points[p + 1].x - (T)points[p].x);
++		T dx = std::abs((T)points[p + 1].x - (T)points[p].x);
+ 		T dy = (T)points[p + 1].y - (T)points[p].y;
+ 		T eval = (T)points[p].y;
+ 		if (type[p] == 0) {
diff --git a/audio/cardinal/files/roundevenf-definition.c b/audio/cardinal/files/roundevenf-definition.c
new file mode 100644
index 000000000000..acf971a21d0b
--- /dev/null
+++ b/audio/cardinal/files/roundevenf-definition.c
@@ -0,0 +1,6 @@
+#include <math.h>
+
+extern "C"
+float roundevenf(float x) {
+  return rintf(x);
+}