Re: [A-A-P-develop] Monthly report A-A-P, July 2003

Bram Moolenaar wrote:

> - Add an autoconf-like configuration feature.  SCons also has a similar
>   feature, it would be a good idea to attempt working on this together.
>   Joerg Beyer also has done some work on this, but has not shown
>   progress the last two months.  Closely related to this is
>   automatically finding tools installed on the system (including
>   compilers) and using them for building.  I intend to work about two
>   weeks on this.

well, it's not that bad :-)

I have code working to detect which header files are available. you
could say if a header file is needed: if it's not there, then the
build is not possible, if one of a set of headers is needed (like
any of time.h or sys/time.h) or a header file is optional (like
a ssl header: if it's there then the build might take profit of it).

roughly the same for libaries.

And a simple compiler detection is also in place.

an example receipe looks like this:

-------------------------------------------
configure:
     # find a C compiler, assign it's name to the aap variable CC
     :conf compiler CC gcc cc
     #
     # find a C++ compiler, assign it's name to the aap variable CXX
     :conf compiler CXX g++ c++ gcc
     #
     :conf headers dirent.h fcntl.h fnmatch.h stdlib.h string.h unistd.h 
sys/dir.h sys/stat.h sys/types.h
     :conf {oneof} headers time.h sys/times.h
     # the next header does not exist
     :conf {optional} headers was_willst_du.h huhu.h
     # find the lib-z and check if it contains the symbol compress
     :conf libs z compress

     # the next lib does not exist
     :conf {optional} libs strange ups
     :conf {optional} libs ssl ssl_new
-------------------------------------------

output will be a confdefs.h (which contains the names of the header
that have been found), it looks like this:

---------------------------------------
/* auto generated file, do not edit */

#define HAVE_DIRENT_H 1

#define HAVE_FCNTL_H 1

#define HAVE_FNMATCH_H 1

#define HAVE_STDLIB_H 1

#define HAVE_STRING_H 1

#define HAVE_UNISTD_H 1

#define HAVE_SYS_DIR_H 1

#define HAVE_SYS_STAT_H 1

#define HAVE_SYS_TYPES_H 1

#define HAVE_TIME_H 1

#define HAVE_LIBZ 1

/* #undef HAVE_WAS_WILLST_DU_H */

/* #undef HAVE_HUHU_H */

/* #undef HAVE_LIBSTRANGE */
---------------------------------------

the file config.aap is also generated and contails some variables that
carry feature test results, like what is the name of the c++ compiler:
--------------------------------
# this is machine generated, do not change

CC=gcc
CXX=g++
LIBS=-lz
--------------------------------

I need to catch up with current a-a-p changes (have not done cvs up
for a while) and the code should be extended if there is interest in
it.


     Joerg



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