Re: [gentoo-embedded] configure: error: C++ compiler cannot create executables

[Enrico Weigelt]

* Mike Frysinger <vapier@g.o> schrieb:
> On Saturday, February 05, 2011 10:16:16 Enrico Weigelt wrote:
> > No, they aren't. They are just macros which are expanded to a big-fat
> > unreable shellscript w/o any functions.
>
> once again you show that you dont follow the projects you spend time
> criticizing.  autoconf has for quite some time now required shells to support
> functions since it generates code that uses functions.

Well, actually, there are a few shell functions somewhere deep
in the fat shellscript, but still it's lightyears away from
the concept of structured programming w/ functions/procedures
(introduced somewhere in the 60th).

A about 130 lines configure.ac still produces a 13.800 lines
unreadable configure script (factor 100 !).

Why isn't, eg., something like AC_CHECK_LIB just a function call ?
There could be easily one generic function that does the job on
the given parameters and also tells the success as return value,
so you could directly write:

    ac_check_library 'z' 'zlibVersion' || ac_error 'zlib not installed'

instead of:

    AC_CHECK_LIB(z, zlibVersion, , AC_ERROR([zlib not installed]))                                                                     
(which translates to more than 60 lines of shell code in the fat script).


BTW: the whole AC_CHECK_LIB approach (trying to compile a call to
the given function name) uses broken C code - try it on GCC with
-Werror and see what happens ;-o


cu
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 Enrico Weigelt, metux IT service -- http://www.metux.de/

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