readme.org: add language fixes by tomek

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Daniel Kochmański 2017-07-25 08:53:28 +02:00
parent 3e19d40d40
commit 6a5dea524d

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@ -1,33 +1,34 @@
#+TITLE: Build an asdf system with dependencies
#+AUTHOR: Bo Yao <icerove@gmail.com>
Besides the simple situation that we write Lisp without depending on
any other Lisp libraries. A more practical example is to build a
library which depends on other asdf systems. ECL provides a useful
extension for asdf called ~asdf:make-build~, which provides
abstraction for building libraries direclty from system
First, let's disregard the simple situation in which we write Lisp
without depending on any other Lisp libraries. A more practical
example is to build a library that depends on other asdf systems. ECL
provides a useful extension for asdf called ~asdf:make-build~, which
offers an abstraction for building libraries directly from system
definitions.
To download dependencies you may use Quicklisp to load your system
(with dependencies defined). Make sure you can successfully load and
run your library in ECL REPL (or ~*slime-repl*~). Don't worry about
other libraries loaded in your image ECL will only build and pack
libraries your project depends on (that is, all dependence you put in
your ~.asd~ file, and their dependencies - nothing more, despite the
fact that other libraries may be loaded).
libraries your project depends on (that is, all dependencies you put
in your ~.asd~ file, and their dependencies - nothing more, despite
the fact that other libraries may be loaded).
** Example code to build
We use a simple project depends on ~alexandria~ to demonstrate the
interface. Example consists of ~example-with-dep.asd~, ~package.lisp~
and ~example.lisp~ (included in ~examples/asdf_with_dependence/~
directory in ECL source tree). Before any kind of build you need to
push full path of this directory to ~asdf:*central-registry*~ (or link
it in the location already recognized by ASDF).
We use a simple project that depends on ~alexandria~ to demonstrate
the interface. The example consists of ~example-with-dep.asd~,
~package.lisp~ and ~example.lisp~ (included in the
~examples/asdf_with_dependence/~ directory in the ECL source tree).
Before any kind of build you need to push the full path of this
directory to ~asdf:*central-registry*~ (or link it in a location
already recognized by ASDF).
** Build it as an single executable
** Build it as a single executable
Use this in REPL to make a executable:
Use this in REPL to make an executable:
#+BEGIN_SRC common-lisp
(asdf:make-build :example-with-dep
@ -37,11 +38,11 @@ Use this in REPL to make a executable:
(si:exit)))
#+END_SRC
Here the ~:epilogue-code~ is what to do after loading our library, we
can use arbitrary Lisp forms here. You can also write this code in
Here the ~:epilogue-code~ is executed after loading our library; we
can use arbitrary Lisp forms here. You can also put this code in
your Lisp files and directly build them without this ~:epilogue-code~
option to have the same effect. Run the program in console will
display the following and exit:
option to achieve the same result. Running the program in a console
will display the following and exit:
#+BEGIN_SRC shell
Factorial of 5 is: 120
@ -59,13 +60,13 @@ Use this in REPL to make a shared library:
#+END_SRC
Here ~:monolithic t~ means that ECL will compile the library and all
its dependencies into one library named
~example-with-dep--all-systems.so~. ~:move-here~ parameter is
self-explanatory. ~:init-name~ gives the name for initialization
function. Each library if linked from C/C++ code must be initialized
and this is a mechanism to specify the initialization function name.
its dependencies into a single library named
~example-with-dep--all-systems.so~. The ~:move-here~ parameter is
self-explanatory. ~:init-name~ sets the name of the initialization
function. Each library linked from C/C++ code must be initialized,
and this is a mechanism to specify the initialization function's name.
To use it, we use a simple C program:
To use it, we write a simple C program:
#+BEGIN_SRC c
/* test.c */
@ -86,14 +87,14 @@ int main (int argc, char **argv) {
#+END_SRC
Compile file using standard C compiler (note linking to ~libecl.so~
with ~-lecl~ which provides lisp runtime[fn:1]):
Compile the file using a standard C compiler (note we're linking to
~libecl.so~ with ~-lecl~, which provides the lisp runtime[fn:1]):
#+BEGIN_SRC shell
gcc test.c example-with-dep--all-systems.so -o test -lecl
#+END_SRC
If ECL is installed in non-standard location you may need to provide
If ECL is installed in a non-standard location you may need to provide
flags for the compiler and the linker. You may read them with:
#+BEGIN_SRC shell
@ -102,7 +103,7 @@ ecl-config --libs
#+END_SRC
Since our shared object is not in the standard location, you need to
provice ~LD_LIBRARY_PATH~ pointing and the current directory to run
provide ~LD_LIBRARY_PATH~ pointing to the current directory to run
the application:
#+BEGIN_SRC shell
@ -142,14 +143,15 @@ library called ~complex-example~, that depends on ~alexandria~ and
:init-name "init_bt")
#+END_SRC
Note that we haven't specified ~:monolithic t~ so we need to build
~bordeaux-threads~ as well, because ~cl-fad~ depends on it. The
building sequence doesn't matter and the result ~.so~ files can also
be used in your future program if these libraries are not modified.
Note that we haven't specified ~:monolithic t~, so we need to build
~bordeaux-threads~ as well because ~cl-fad~ depends on it. The
building sequence doesn't matter and the resultant ~.so~ files can
also be used in your future programs if these libraries are not
modified.
We need to initialize all these modules using ~ecl_init_module~ in the
correct order (~bordeaux-threads~ must be initialized before ~cl-fad~,
~cl-fad~ and ~alexandria~ must be initialized before ~complex-ecample~).
correct order. (~bordeaux-threads~ must be initialized before ~cl-fad~;
~cl-fad~ and ~alexandria~ must be initialized before ~complex-ecample~.)
Here is a code snippet (not a full program):
#+BEGIN_SRC c
@ -166,7 +168,7 @@ ecl_init_module(NULL, init_alexandria);
ecl_init_module(NULL, init_example);
#+END_SRC
** Build it as static library and use in C
** Build it as a static library and use in C
To build a static library, use:
#+BEGIN_SRC common-lisp
@ -177,9 +179,9 @@ To build a static library, use:
:init-name "init_example")
#+END_SRC
That will generate a ~example-with-dep--all-systems.a~ in current
directory and we need to initialize it with ~init_example~
function. And compile it using:
This will generate ~example-with-dep--all-systems.a~ in the current
directory which we need to initialize with the ~init_example~
function. Compile it using:
#+BEGIN_SRC shell
gcc test.c example-with-dep--all-systems.a -o test-static -lecl
@ -197,10 +199,10 @@ This will show:
Factorial of 5 is: 120
#+END_SRC
Note we don't need to give current path in ~LD_LIBRARY_PATH~ here,
since our Lisp library is statically bundled to the executable. The
result is same as the shared library example above. You can also build
all dependent libraries separately to static libraries.
Note we don't need to pass the current path in ~LD_LIBRARY_PATH~ here,
since our Lisp library is statically bundled with the executable. The
result is the same as the shared library example above. You can also
build all dependent libraries separately as static libraries.
* Footnotes