An example on how to embed ECL using C compilers and ASDF.

examples/embed/Makefile

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+hello.exe: hello.c hello-lisp.a
+	$(CC) `ecl-config --cflags` -o $@ hello.c hello-lisp.a \
+	      `ecl-config --ldflags` -lecl
+
+hello-lisp.a: hello-lisp.lisp
+	ecl -norc \
+	    -eval '(require :asdf)' \
+	    -eval '(push "./" asdf:*central-registry*)' \
+	    -eval '(asdf:make-build :hello-lisp :type :static-library :move-here "./$@")' \
+	    -eval '(quit)'
+
+clean:
+	-rm -f hello-lisp.a hello.exe

examples/embed/README

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+This example shows how to compile a Common Lisp program using ECL
+and link it together with a C program. The example focuses on the
+building process, not on the C code needed to do various things
+with the embedded libraries.

examples/embed/hello-lisp.asd

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+(defsystem "hello-lisp"
+    :components ((:file "hello-lisp")))

examples/embed/hello-lisp.lisp

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+(defun hello-lisp () (format t "hello-lisp!~%"))

examples/embed/hello.c

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+#include <stdio.h>
+#include <ecl/ecl.h>
+
+int main (int argc, char **argv) {
+  /* Initialize ECL */
+  cl_boot(argc, argv);
+
+  /* Initialize the library we linked in. Each library
+   * has to be initialized. It is best if all libraries
+   * are joined using ASDF:MAKE-BUILD.
+   */
+  extern void init_lib_HELLO_LISP(cl_object);
+  ecl_init_module(NULL, init_lib_HELLO_LISP);
+
+  cl_eval(c_string_to_object("(hello-lisp)"));
+
+  cl_shutdown();
+  return 0;
+}