[P8lite Android Development] surdu_petru:
GPS fix by surdu_petru !

This is the answer for which we offered a free smartphone to the discoverer, some time ago - unfortunately for you, the phone stayed to me because no one was able to fix GPS :

Please edit this file : aosip/bionic/libc/bionic/__vsprintf_chk.cpp in this way :

/*
* Copyright (C) 2012 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#undef _FORTIFY_SOURCE

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "private/libc_logging.h"

/*
* Runtime implementation of __builtin____vsprintf_chk.
*
* See
* http://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html
* http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html
* for details.
*
* This vsprintf check is called if _FORTIFY_SOURCE is defined and
* greater than 0.
*/
extern "C" int __vsprintf_chk(char* dest, int /*flags*/,
size_t dest_len_from_compiler, const char* format, va_list va) {
int result = vsnprintf(dest, dest_len_from_compiler, format, va);
if ((size_t) result >= dest_len_from_compiler) {
__fortify_chk_fail("vsprintf: prevented write past end of buffer", 0);
}
return result;
}

with : ( you should add the red characters )

/*

* Copyright (C) 2012 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#undef _FORTIFY_SOURCE

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "private/libc_logging.h"

/*
* Runtime implementation of __builtin____vsprintf_chk.
*
* See
* http://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html
* http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html
* for details.
*
* This vsprintf check is called if _FORTIFY_SOURCE is defined and
* greater than 0.
*/
extern "C" int __vsprintf_chk(char* dest, int /*flags*/,
size_t dest_len_from_compiler, const char* format, va_list va) {
int result = vsnprintf(dest, dest_len_from_compiler, format, va);
if ((size_t) result >= dest_len_from_compiler) {
[B][I][COLOR="Red"]//[/COLOR][/I][/B]__fortify_chk_fail("vsprintf: prevented write past end of buffer", 0);
[B][I][COLOR="red"]result = (int)dest_len_from_compiler - 1;[/COLOR][/I][/B]
}
return result;
}

With this hack, GPS will be working on all Nougat custom ROMs :)