diff '--color=auto' -ur setbfree-99999999.orig/common.mak setbfree-99999999/common.mak
--- setbfree-99999999.orig/common.mak	2025-06-16 22:33:59.137450124 +0200
+++ setbfree-99999999/common.mak	2025-06-16 22:36:37.144757538 +0200
@@ -2,6 +2,7 @@
 
 PREFIX ?= /usr/local
 OPTIMIZATIONS ?= -msse -msse2 -mfpmath=sse -ffast-math -fomit-frame-pointer -O3 -fno-finite-math-only
+LIBDIR ?= lib
 ENABLE_CONVOLUTION ?= no
 INSTALL_EXTRA_LV2 ?= no
 FONTFILE?=/usr/share/fonts/truetype/ttf-bitstream-vera/VeraBd.ttf
@@ -20,18 +21,19 @@
 
 bindir = $(PREFIX)/bin
 sharedir = $(PREFIX)/share/setBfree
-lv2dir = $(PREFIX)/lib/lv2
+lv2dir = $(PREFIX)/$(LIBDIR)/lv2
 
-CFLAGS ?= $(OPTIMIZATIONS) -Wall
+CFLAGS ?= -Wall
 ifeq ($(XWIN),)
 override CFLAGS += -fPIC
 endif
 override CFLAGS += -DVERSION="\"$(VERSION)\""
+override CFLAGS += -fpermissive
 
 STRIP      ?= strip
 PKG_CONFIG ?= pkg-config
 
-CXXFLAGS ?= $(OPTIMIZATIONS) -Wall
+CXXFLAGS ?= -Wall
 GLUICFLAGS=-I. -I.. -Wno-unused-function
 STRIPFLAGS=-s