Compilation warning on 9.5 - Mailing list pgsql-hackers

Hello:

I am a pgRouting developer.

In my CmakeLists.txt I use this flags:
set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -std=gnu99 -fPIC -O2 -g -Wall -Wconversion -pedantic -fmax-errors=10  -Wmissing-prototypes -frounding-math")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x -fPIC -O2 -g -Wconversion -Wall -pedantic -fmax-errors=10 -Wextra  -frounding-math -Wno-deprecated")


for testing I use travis CI framework and test pgRouting using postgresql 9.1 to 9.5
I follow the instructions for including:
#include "postgres.h"
#include "executor/spi.h"
#include "funcapi.h"
#include "catalog/pg_type.h"
#if PGSQL_VERSION > 92
#include "access/htup_details.h"
#endif
#include "fmgr.h"


I wonder if -std=gnu99 is the correct standard to include postgres.h etc. in 9.5 
because that standard (and all the flags I am using to generate pgrouting code without warnings)
catches the following catches warnings of type conversions on some postgresql included files.
This doesn't happen on postgresql 9.1 to 9.4

for example:

of course, I can't go and modify  generic.h, c.h which are included when I include postgres.h or spi.h, or any of the files
that I include that are of the postgresql project.

I already posted in this mailing list http://www.postgresql.org/message-id/BAY177-W104EC0B93C9FC5453B04CD8AA90@phx.gbl
But talking with my co-developer Steve Woodbri, he suggested this mailing list.

you can see a full travis test here:
https://travis-ci.org/pgRouting/pgrouting/builds/108791787
(I have my own warnings which I am fixing and are very visible from 9.1 to 9.4)

Note1: when pgRouting gets released, all those flags:
-Wall -Wconversion -pedantic -fmax-errors=10  -Wmissing-prototypes
will be removed, and of course those warnings won't show up.




Thanks
Vicky Vergara