--- Makefile.orig
+++ Makefile
@@ -17,12 +17,16 @@
 VERSION=1.45
 
 .PATH: $(.PARSEDIR)
-prefix?=/usr/local
+prefix?=@@PREFIX@@
 target=$(DESTDIR)$(prefix)
 parsedir:=$(.PARSEDIR)
 srcdir=$(dir $(abspath $(firstword $(MAKEFILE_LIST))))$(parsedir)
 VPATH=$(srcdir)
 
+FLEX=@@FLEX@@
+CC=@@CC@@
+A2X=@@A2X@@
+
 INSTALL = install
 TAR = tar
 
@@ -30,7 +34,7 @@ GCC_WARNINGS1=-Wall -Wpointer-arith -Wstrict-prototypes
 GCC_WARNINGS2=-Wmissing-prototypes -Wmissing-declarations
 GCC_WARNINGS3=-Wno-unused-function -Wno-unused-label -Wno-format-zero-length
 GCC_WARNINGS=$(GCC_WARNINGS1) $(GCC_WARNINGS2) $(GCC_WARNINGS3)
-CFLAGS=$(GCC_WARNINGS)
+CFLAGS+=$(GCC_WARNINGS)
 CPPFLAGS += -I. -I$(srcdir)
 #LIBS=-lrt
 CPPFLAGS += -DVERSION=\"$(VERSION)\"
@@ -40,7 +44,7 @@ CFLAGS += -pthread
 CPPFLAGS += -DTHREADS
 
 # Optimizing for speed. Comment this out for distribution builds
-CFLAGS += -march=native
+#CFLAGS += -march=native
 
 # To enable debugging of the Yacc grammar, uncomment the following line
 #CPPFLAGS += -DYYDEBUG=1
@@ -103,7 +107,7 @@ BISON ?= bison
 gram.h gram.c: gram.y
 	$(BISON)  $(YFLAGS) --defines=gram.h --output-file=gram.c $(srcdir)/gram.y
 lex.h lex.c: lex.l
-	flex $(LFLAGS) --header-file=lex.h --outfile=lex.c $(srcdir)/lex.l
+	$(FLEX) $(LFLAGS) --header-file=lex.h --outfile=lex.c $(srcdir)/lex.l
 
 gram.o: gram.c lex.h gram.h
 import.o: import.c lex.h gram.h
@@ -113,9 +117,9 @@ lex.o: lex.c gram.h
 
 # Requires asciidoc and xsltproc/docbook stylesheets.
 .adoc.1:
-	a2x --doctype manpage --format manpage $<
+	$(A2X) --doctype manpage --format manpage $<
 .adoc.html:
-	a2x --doctype manpage --format xhtml -D . $<
+	$(A2X) --doctype manpage --format xhtml -D . $<
 	rm -f docbook-xsl.css
 
 reporting-bugs.html: reporting-bugs.adoc
@@ -167,7 +167,7 @@ CSUPPRESSIONS = -U__UNUSED__ -UYYPARSE_PARAM -UYYTYPE_INT16 -UYYTYPE_INT8 \
 	-U_SC_NPROCESSORS_ONLN -Ushort -Usize_t -Uyytext_ptr \
 	-Uyyoverflow -U__cplusplus -U__APPLE__ -DCLOCK_REALTIME=0
 cppcheck:
-	cppcheck -I. --template gcc --enable=all $(CSUPPRESSIONS) --suppress=unusedStructMember --suppress=unusedFunction --suppress=unreadVariable --suppress=uselessAssignmentPtrArg --suppress=missingIncludeSystem --inline-suppr *.[ch]
+	cppcheck -I. --template $(CC) --enable=all $(CSUPPRESSIONS) --suppress=unusedStructMember --suppress=unusedFunction --suppress=unreadVariable --suppress=uselessAssignmentPtrArg --suppress=missingIncludeSystem --inline-suppr *.[ch]

 PYLINTOPTS = --rcfile=/dev/null --reports=n \
 	--msg-template="{path}:{line}: [{msg_id}({symbol}), {obj}] {msg}" \