Error: Initializer provided for function, __THROW __asm - c++

Question

I am trying to port an ARM-C library to be compiled with x86_64 C++, and I am getting the following error:
In file included from /usr/include/c++/5/cwchar:44:0,
from /usr/include/c++/5/bits/postypes.h:40,
from /usr/include/c++/5/bits/char_traits.h:40,
from /usr/include/c++/5/string:40,
from MyFile.h:19,
/usr/include/wchar.h:226:20: error: initializer provided for function
__THROW __asm ("wcschr") __attribute_pure__;
^
where MyFile.h has the following structure
// comments
#pragma once
// comments
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string> //<<< line 19
…
Initially, instead of it used to be which gave me a similar error:
In file included from MyFile.h:19:
/usr/include/string.h:73:21: error: initializer provided for function
__THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
^
Compiler version:
GNU C++14 (Ubuntu 5.4.0-6ubuntu1~16.04.11) version 5.4.0 20160609 (x86_64-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3
ldd (Ubuntu GLIBC 2.23-0ubuntu11) 2.23
Compilation flags:
#g++ -O3 -std=c++14 -fpermissive -Wno-system-headers -w
UPDATE 1:
I've been modifying the Makefile, and the original version contains $#.via. For instance:
#$(COMPILE) -M -MF $(subst .o,.d.tmp,$#) -MT $# -E $(C_FLAGS) $#.via $< -o $#.preprocessed.c
and I changed the $#.via for #$#.via because I saw that in an older project they did it like that. However, if I leave as $#.via I just get:
SomeFile.c:1:1 fatal error: OneHeader.h: No such file or directory
I am starting to think that my Makefile is somewhere wrong...
I misunderstood the compiler option... Few lines above, my makefile creates the #.via files passing DEFINES and INCLUDES
#echo $(patsubst %, '%', $(C_DEFINES)) > $#.via
#echo $(C_INCLUDE) >> $#.via
and those #.via files are passed as additional arguments for the compilation. While for armcc the --via is supported see here, I found that for g++ -according to the gcc doc- the syntax is #<your_file>. Thus, what #$#.via does is simply to parse the $#.via to <your_file>.via.
Now I am still getting the initializer provided for function error message.
UPDATE 2:
I found the problem and I explained what happened in the answer section. See below.

Answer 1

Root cause
The problem was originated because I redefined __asm to be replaced by nothing (e.g. #define __asm) since I didn't want to touch the assembly code yet. Remember that I said I am porting ARM to x86, so I thought that easiest way to get rid of the compile errors was to remove all those __asm instructions, but not considering the effects of doing such a thing.
In other words, when I included the string.h header, the header itself uses assembly call as the error messaged pointed out:
/usr/include/wchar.h:226:20: error: initializer provided for function
__THROW __asm ("wcschr") __attribute_pure__;
and when the preprocessor changed the __asm("wcschr") for ("wcschr") the compiler hits the error -- which makes sense.
Moral of the history
Do not redefine qualifiers since it will also affect other modules that you are not seeing directly and prefer creating a macro to just change them (e.g. __asm for /*__asm*/) or just run sed in you code base.