diff -Naur duktape-2.7.0/Makefile duktape-2.7.0.new/Makefile
--- duktape-2.7.0/Makefile	1970-01-01 01:00:00.000000000 +0100
+++ duktape-2.7.0.new/Makefile	2022-08-26 22:43:35.693131752 +0200
@@ -0,0 +1,104 @@
+#
+#  Example of how to build and install locally as a shared library
+#
+#  Usage:
+#
+#    $ make -f Makefile.sharedlibrary
+#    $ sudo make -f Makefile.sharedlibrary install
+#    $ make -f Makefile.sharedlibrary duk  # --> example 'duk' linked to shared libduktape
+#
+#    $ ls -l duk
+#    -rwxrwxr-x 1 duktape duktape 19407 Nov 30 15:48 duk
+#
+#    $ ldd ./duk
+#            linux-vdso.so.1 =>  (0x00007ffd5ed3c000)
+#            libduktape.so.104 => /usr/local/lib/libduktape.so.104 (0x00007fb2f9753000)
+#            libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fb2f944d000)
+#            libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fb2f9088000)
+#            /lib64/ld-linux-x86-64.so.2 (0x00007fb2f9991000)
+#
+#  Based on: http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html
+
+# Soname version must be bumped whenever a binary compatibility change occurs
+# (and should not be bumped when the library is compatible).  A simple Duktape
+# convention is to set soname version to (100*MAJOR + MINOR), e.g. 104 for
+# Duktape 1.4.x, so that it gets automatically bumped for major and minor
+# releases (potentially binary incompatible), but not for patch releases.
+# The formatted version is used for the pkg-config file.
+DUK_VERSION = 20700
+DUK_VERSION_FORMATTED = 2.7.0
+SONAME_VERSION = 207
+REAL_VERSION = $(SONAME_VERSION).$(DUK_VERSION)
+
+# Mac has an unusual .so naming convention
+ifeq ($(OS),Windows_NT)
+    DETECTED_OS := Windows
+else
+    DETECTED_OS := $(shell uname -s)
+endif
+ifeq ($(DETECTED_OS),Darwin)
+    LD_SONAME_ARG=-install_name
+    SO_SONAME_SUFFIX=$(SONAME_VERSION).so
+    SO_REALNAME_SUFFIX=$(REAL_VERSION).so
+else
+    LD_SONAME_ARG=-soname
+    SO_SONAME_SUFFIX=so.$(SONAME_VERSION)
+    SO_REALNAME_SUFFIX=so.$(REAL_VERSION)
+endif
+
+# Change to actual path for actual distribution packaging.
+INSTALL_PREFIX ?= /usr/local
+INSTALL_PREFIX := $(INSTALL_PREFIX)
+DESTDIR ?=
+DESTDIR := $(DESTDIR)
+LIBDIR ?= /lib
+LIBDIR := $(LIBDIR)
+
+# The 'noline' variant may be more appropriate for some distributions; it
+# doesn't have #line directives in the combined source.
+DUKTAPE_SRCDIR = ./src
+#DUKTAPE_SRCDIR = ./src-noline
+
+CC ?= gcc
+CC := $(CC)
+
+.PHONY: all
+all: libduktape.$(SO_REALNAME_SUFFIX) libduktaped.$(SO_REALNAME_SUFFIX) duktape.pc
+
+# If the default duk_config.h is not suitable for the distribution, modify it
+# before compiling the shared library and copy the same, edited duk_config.h
+# to $INSTALL_PREFIX/include on installation.
+
+libduktape.$(SO_REALNAME_SUFFIX):
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -shared -fPIC -Wall -Wextra -Os -Wl,$(LD_SONAME_ARG),libduktape.$(SO_SONAME_SUFFIX) \
+		-o $@ $(DUKTAPE_SRCDIR)/duktape.c -lm
+
+libduktaped.$(SO_REALNAME_SUFFIX):
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -shared -fPIC -g -Wall -Wextra -Os -Wl,$(LD_SONAME_ARG),libduktaped.$(SO_SONAME_SUFFIX) \
+		-o $@ $(DUKTAPE_SRCDIR)/duktape.c -lm
+
+duktape.pc:
+	sed -e "s|@PREFIX@|$(INSTALL_PREFIX)|" \
+		-e "s|@LIBDIR@|$(LIBDIR)|" \
+		-e "s|@VERSION@|$(DUK_VERSION_FORMATTED)|" \
+		duktape.pc.in \
+		> duktape.pc
+
+# Symlinks depend on platform conventions.
+.PHONY: install
+install: libduktape.$(SO_REALNAME_SUFFIX) libduktaped.$(SO_REALNAME_SUFFIX) duktape.pc
+	mkdir -p $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/pkgconfig
+	cp $+ $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/
+	rm -f $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktape.so $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktape.$(SO_SONAME_SUFFIX)
+	ln -s libduktape.$(SO_REALNAME_SUFFIX) $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktape.so
+	ln -s libduktape.$(SO_REALNAME_SUFFIX) $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktape.$(SO_SONAME_SUFFIX)
+	rm -f $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktaped.so $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktaped.$(SO_SONAME_SUFFIX)
+	ln -s libduktaped.$(SO_REALNAME_SUFFIX) $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktaped.so
+	ln -s libduktaped.$(SO_REALNAME_SUFFIX) $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktaped.$(SO_SONAME_SUFFIX)
+	mv $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/duktape.pc $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/pkgconfig/
+	mkdir -p $(DESTDIR)$(INSTALL_PREFIX)/include/
+	cp $(DUKTAPE_SRCDIR)/duktape.h $(DUKTAPE_SRCDIR)/duk_config.h $(DESTDIR)$(INSTALL_PREFIX)/include/
+
+CCOPTS = -I./examples/cmdline
+duk:
+	$(CC) $(CCOPTS) -I$(INSTALL_PREFIX)/include -L$(INSTALL_PREFIX)$(LIBDIR) -Wall -Wextra -Os -o $@ ./examples/cmdline/duk_cmdline.c -lduktape -lm
diff -Naur duktape-2.7.0/Makefile.sharedlibrary duktape-2.7.0.new/Makefile.sharedlibrary
--- duktape-2.7.0/Makefile.sharedlibrary	2022-02-18 22:22:19.000000000 +0100
+++ duktape-2.7.0.new/Makefile.sharedlibrary	1970-01-01 01:00:00.000000000 +0100
@@ -1,104 +0,0 @@
-#
-#  Example of how to build and install locally as a shared library
-#
-#  Usage:
-#
-#    $ make -f Makefile.sharedlibrary
-#    $ sudo make -f Makefile.sharedlibrary install
-#    $ make -f Makefile.sharedlibrary duk  # --> example 'duk' linked to shared libduktape
-#
-#    $ ls -l duk
-#    -rwxrwxr-x 1 duktape duktape 19407 Nov 30 15:48 duk
-#
-#    $ ldd ./duk
-#            linux-vdso.so.1 =>  (0x00007ffd5ed3c000)
-#            libduktape.so.104 => /usr/local/lib/libduktape.so.104 (0x00007fb2f9753000)
-#            libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fb2f944d000)
-#            libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fb2f9088000)
-#            /lib64/ld-linux-x86-64.so.2 (0x00007fb2f9991000)
-#
-#  Based on: http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html
-
-# Soname version must be bumped whenever a binary compatibility change occurs
-# (and should not be bumped when the library is compatible).  A simple Duktape
-# convention is to set soname version to (100*MAJOR + MINOR), e.g. 104 for
-# Duktape 1.4.x, so that it gets automatically bumped for major and minor
-# releases (potentially binary incompatible), but not for patch releases.
-# The formatted version is used for the pkg-config file.
-DUK_VERSION = 20700
-DUK_VERSION_FORMATTED = 2.7.0
-SONAME_VERSION = 207
-REAL_VERSION = $(SONAME_VERSION).$(DUK_VERSION)
-
-# Mac has an unusual .so naming convention
-ifeq ($(OS),Windows_NT)
-    DETECTED_OS := Windows
-else
-    DETECTED_OS := $(shell uname -s)
-endif
-ifeq ($(DETECTED_OS),Darwin)
-    LD_SONAME_ARG=-install_name
-    SO_SONAME_SUFFIX=$(SONAME_VERSION).so
-    SO_REALNAME_SUFFIX=$(REAL_VERSION).so
-else
-    LD_SONAME_ARG=-soname
-    SO_SONAME_SUFFIX=so.$(SONAME_VERSION)
-    SO_REALNAME_SUFFIX=so.$(REAL_VERSION)
-endif
-
-# Change to actual path for actual distribution packaging.
-INSTALL_PREFIX ?= /usr/local
-INSTALL_PREFIX := $(INSTALL_PREFIX)
-DESTDIR ?=
-DESTDIR := $(DESTDIR)
-LIBDIR ?= /lib
-LIBDIR := $(LIBDIR)
-
-# The 'noline' variant may be more appropriate for some distributions; it
-# doesn't have #line directives in the combined source.
-DUKTAPE_SRCDIR = ./src
-#DUKTAPE_SRCDIR = ./src-noline
-
-CC ?= gcc
-CC := $(CC)
-
-.PHONY: all
-all: libduktape.$(SO_REALNAME_SUFFIX) libduktaped.$(SO_REALNAME_SUFFIX) duktape.pc
-
-# If the default duk_config.h is not suitable for the distribution, modify it
-# before compiling the shared library and copy the same, edited duk_config.h
-# to $INSTALL_PREFIX/include on installation.
-
-libduktape.$(SO_REALNAME_SUFFIX):
-	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -shared -fPIC -Wall -Wextra -Os -Wl,$(LD_SONAME_ARG),libduktape.$(SO_SONAME_SUFFIX) \
-		-o $@ $(DUKTAPE_SRCDIR)/duktape.c
-
-libduktaped.$(SO_REALNAME_SUFFIX):
-	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -shared -fPIC -g -Wall -Wextra -Os -Wl,$(LD_SONAME_ARG),libduktaped.$(SO_SONAME_SUFFIX) \
-		-o $@ $(DUKTAPE_SRCDIR)/duktape.c
-
-duktape.pc:
-	sed -e "s|@PREFIX@|$(INSTALL_PREFIX)|" \
-		-e "s|@LIBDIR@|$(LIBDIR)|" \
-		-e "s|@VERSION@|$(DUK_VERSION_FORMATTED)|" \
-		duktape.pc.in \
-		> duktape.pc
-
-# Symlinks depend on platform conventions.
-.PHONY: install
-install: libduktape.$(SO_REALNAME_SUFFIX) libduktaped.$(SO_REALNAME_SUFFIX) duktape.pc
-	mkdir -p $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/pkgconfig
-	cp $+ $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/
-	rm -f $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktape.so $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktape.$(SO_SONAME_SUFFIX)
-	ln -s libduktape.$(SO_REALNAME_SUFFIX) $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktape.so
-	ln -s libduktape.$(SO_REALNAME_SUFFIX) $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktape.$(SO_SONAME_SUFFIX)
-	rm -f $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktaped.so $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktaped.$(SO_SONAME_SUFFIX)
-	ln -s libduktaped.$(SO_REALNAME_SUFFIX) $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktaped.so
-	ln -s libduktaped.$(SO_REALNAME_SUFFIX) $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/libduktaped.$(SO_SONAME_SUFFIX)
-	mv $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/duktape.pc $(DESTDIR)$(INSTALL_PREFIX)$(LIBDIR)/pkgconfig/
-	mkdir -p $(DESTDIR)$(INSTALL_PREFIX)/include/
-	cp $(DUKTAPE_SRCDIR)/duktape.h $(DUKTAPE_SRCDIR)/duk_config.h $(DESTDIR)$(INSTALL_PREFIX)/include/
-
-CCOPTS = -I./examples/cmdline
-duk:
-	$(CC) $(CCOPTS) -I$(INSTALL_PREFIX)/include -L$(INSTALL_PREFIX)$(LIBDIR) -Wall -Wextra -Os -o $@ ./examples/cmdline/duk_cmdline.c -lduktape -lm