This is the first change in an attempt to arrange the linking so that
more errors are detected at link-time.
- All files in server/core but for gateway.c are linked to one shared
library called maxscale-common.
- The files log_manager/log_manager.cc and utils/skygw_utils.cc are
built into maxscale-common as well.
- MaxScale itself consists now only of gateway.c and is linked with
maxscale-common.
- All plugins link with maxscale-common.
- All executables link in addition with {EMBEDDED_LIB}.
After this change, the change (MXS-517) where query_classifier is the
only component that uses ${EMBEDDED_LIB} and the rest mysqlclient can
be made much cleaner.
After a few additional steps, all shared libraries can be linked with
the linker flags "-Wl,-z,defs", which directs the linker to resolve
all symbols. That will require that all shared libraries list all the
libraries they need, but will at the same time ensure that any
missing symbols are detected at link-time and not at run-time.
The comments which do not alter the functionality of a query are now removed
from canonicalized queries.
Also fixed missing semicolon in the comment removal regex and added tests
for comment removal.
Fixed mistakes in the canonicalization regular expressions and altered the
functions to use a source and destination buffers. This reduces the amount
of memory allocations that take place.
Added more canonical query tests to the internal test suite.
The query does not need to be parsed for it to be canonicalized and the parsing
uses the PCRE2 library. The regular expressions were changed so that only one
call to the function which replaces literal unquoted values is made.
Since the PCRE2 library was always going to be a part of MaxScale, there was
no real reason to have it as a shared library apart from smaller binaries.
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Also includes a fix to a bug caused by a previous Coverity error change in canonizer.c
Main assumed multi-byte characters in memory allocation but not outside of it so I removed that code and made it consistently assume single-byte characters.
Terminating character was added always to the last byte of string buffer regardless of the length of the string. Removed it and replaced malloc with calloc.
Moved variable introductions from the middle of the function to the beginning of it.
String buffer allocation didn't allocate space for terminating char. It also assumed that character size may vary but the rest of the code didn't support multi-byte characters so I changed it consistently assume single-byte characters.
