minimal required version of (optional) tools

[Дилян Палаузов]

Hello,

is it possible to define in doc/install-compile.html the minimum 
versions of the tools, a developer needs in order to re-generate all 
source files need for the compilation of cyrus-imapd?

The needed tools are autoconf, automake, bison, (f)lex, gperf, libtool 
and possibly compile_et .

with the version requirements
   autoconf >= 2.67
   automake >= 1.10
   libtool >= 2.2.6

What about the minimum required version of (f)lex, bison and gperf?

gperf is checked for, only when ./configure --maintainer-mode .  If 
gperf is not found, ./configure aborts (I think).  However, ./configure 
always checks for lex and bison, and does not fail, if they are not 
found (I think).

Can we stick to flex instead of lex?  In any case, flex 2.5.35 supports 
%option reentrant noyyget_FUNCTIO and noyyset_FUNCTION, which options 
are not supported by lex on ci.cyrusimap.org .  noyyget_ and noyyset_ 
permit to exclude some unneeded functions from sieve/addr-lex.c and 
sieve/sieve-lex.c, which results smaller .c files and smaller tables of 
exported symbols (which in theory means less time for the dynamic linker 
to find an exported symbol).

Със здраве
   Дилян


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