Hello,
I'm having some trouble using precompiled (gch) files. I searched
extensively, but only found
http://gcc.gnu.org/onlinedocs/gcc/Precompiled-Headers.html which didn't
help me much.
I have the following directory structure:
/home/efrat/gch
/home/efrat/gch/include/a.cpp
/home/efrat/gch/include/detail/hd.hpp
/home/efrat/gch/build/makefile
The content of a.hpp is:
___
#include "precomp_hd.h"
int
main
()
{
foo();
}
___
The content of hd.hpp is:
___
#include <iostream>
using namespace std;
void
foo
()
{
cout << "Hooray!" << endl;
}
___
The content of makefile is:
___
comp = g++
comp_warn_flags = -Wall
include_dirs = -I/home/efrat/gch
base_dir = /home/efrat/gch
precomp_hd.h.gch:
$(comp) $(comp_warn_flags) $(include_dirs) -o
$(base_dir)/include/precomp_hd.h.gch -xc++ -c
$(base_dir)/include/detail/hd.hpp
a.out: precomp_hd.h.gch
$(comp) $(comp_warn_flags) $(include_dirs) $(base_dir)/include/a.cpp -o
a.out
___
But when I try to build a.out, I get:
___
error: precomp_hd.h: No such file or directory
___
So I don't understand how to get the cpp to use the precompiled header.
I played around a lot with different includes, directory locations and
stuff - all with the same result.
If someone could tell me what I'm doing wrong, I'd appreciate it very
much. Alternatively, if someone could just point me to some simple
working example of using gchs (which I couldn't find myself), that would
be fine as well.
Many Thanks!
Efrat
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