cffi-devel May 2015

cffi-devel@common-lisp.net

6 participants
5 discussions

How to customize cffi-grovel:*cc*, *cc-flags*?
by Mirko Vukovic 03 Aug '15

03 Aug '15

Hello, in order to get GSLL to run on Windows7+CCL+MSYS2+GSL, I needed to customize *cc* and *cc-flags*. Right now, I do this by modifying the code in grovel.lisp, as for *cc-flags*: #+(and windows msys2) (list "-I" "E:/msys64/mingw64/lib/libffi-3.2.1/include/" "-I" "c:/Users/977315/quicklisp/dists/quicklisp/software/cffi_0.14.0/") (I prefer not to modify system-wide environment variables on my PC) I see alternate ways of achieving the same effect: 1. Write own gsll loader that customizes *cc* and *cc-flags* 2. Write own cffi-libffi loader that customizes the variables 3. (somehow) advise gsll or cffi-libffi loaders in my lisp-init files to customize the variables 4. Modify environment variables for my process. What is the advised way to do this? I would prefer 3: in my lisp startup file, I (somehow) write some advice code to asdf that customize *cc* and *cc-flags*. But I don't know how to do that. Thank you, Mirko

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CFFI 0.15.0 released
by Luís Oliveira 28 May '15

28 May '15

Hello, I've just released CFFI 0.15.0. https://github.com/cffi/cffi/wiki/NEWS#version-0150 Cheers, -- Luís Oliveira http://kerno.org/~luis/

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markus.ingvarsson@gmail.com has indicated you're a friend. Accept?
by markus＠flambard.se 27 May '15

27 May '15

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Unable to load cffi-libffi in Debian jessie
by Marshall Mason 02 May '15

02 May '15

Hello, I'm new to cffi and Lisp in general. I've been having a lot of trouble getting cffi to work with passing structs using libffi. I fussed with it for weeks and decided to wait until I upgraded Debian to jessie to see if that helped. Now I can't even load cffi-libffi. :( Failed to find the TRUENAME of /usr/share/common-lisp/source/cl-cffi/libffi/init.lisp: No such file or directory Before that there are a bunch of warnings like this: compiling #<STATIC-FILE "alexandria" "LICENCE"> completed without its input file #P"/usr/share/common-lisp/source/alexandria/LICENCE" The code: #!/usr/bin/sbcl --script (require "asdf") (asdf:load-system :cffi) (asdf:load-system :cffi-libffi) This could just be a missing package, but I have everything I can think of. I searched the Debian respository for /usr/share/common-lisp/source/cl-cffi/libffi/init.lisp and none of them provide it. Here are my package versions: sbcl 2:1.2.4-2 cl-cffi 1:0.14.0-1 cl-asdf 2:3.1.4-1 libffi6 3.1-2+b2 libffi-dev 3.1-2+b2 Can anyone help me solve this? Marshall

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Error when passing struct by value
by Marshall Mason 01 May '15

01 May '15

Hello, I'm using SBCL version 1.2.4, CFFI version 0.14.0, and libffi version 3.1. I've been trying to pass a struct by value using CFFI and libffi. I'm a newbie to both CFFI and Lisp so I had to piece this together from the manual as well as some of the unit tests that come with CFFI. I'm getting an error that I just can't get past: The value READ-FUNC is not of type SB-SYS:SYSTEM-AREA-POINTER The library I'm trying to wrap is libvorbisfile, which decodes Ogg Vorbis files. It has an init function called ov_open_callbacks: int ov_open_callbacks(void *datasource, OggVorbis_File *vf, const char *initial, long ibytes, ov_callbacks callbacks); The part it's choking on is the last argument, a struct, passed by value, of callback functions: typedef struct { size_t (*read_func) (void *ptr, size_t size, size_t nmemb, void *datasource); int (*seek_func) (void *datasource, ogg_int64_t offset, int whence); int (*close_func) (void *datasource); long (*tell_func) (void *datasource); } ov_callbacks; The library is designed to use one of a few static structs defined in a header file. Since it's defined in the header file and not in libvorbisfile.so, I must create CFFI translation code. There were a lot of other structs I had to wrap with CFFI as well. Here is my code: http://pastie.org/10122885 Does anyone have any clues about what I'm doing wrong here? (Regarding my previous email about getting CFFI working on Debian jessie, it turns out the Debian version of cl-alexandria is missing a file and cl-cffi is buggy, so I just added the missing file and installed the CFFI source by hand. Thanks for the response, Fau.) Marshall

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cffi-devel May 2015