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You're thinking of configure scripts - they take a --prefix argument, makefiles don't.



Order of arguments with "make val=arg" doesn't matter either, and I don't know what you mean by the...

Use makefile variables - they $(look_like_this) - and pass them as environment variables on the command line, e.g.:


$ cat makefile
speak:
echo $(PHRASE)
$ make speak PHRASE=hi
echo hi...

The problem is that:

*i--;

decrements the pointer, not the pointed-to value. I.e. it's equivalent to:


*(i--);


What you really want is:


(*i)--;


(On my machine at least, your...

select()/poll() are for monitoring multiple file descriptors for activity - the code you posted only handles one file descriptor, so they will not help you.

Apart from that, it very much depends...

Of course - d'oh! Apologies if anyone was confused...

Kind of, but you seem to just be checking for a specific error. Generally for *NIX system calls:


The return value tells you whether there was an error or not, and
errno tells you the specific...

You're trying to make a template specialization, which means you need to use a concrete type instead of the generic T. So you could do e.g.:


template<> int* AddFun<int*>(int* i, int* j) {
...

`--target' is for cross-compilers - you want to use `--host' instead.

If that doesn't work, try using the output of `arm-elf-gcc -dumpmachine' instead of `arm-elf' (assuming your cross-toolchain...

Okay, you first need to assess whether or not the mysql query went OK or not. Either "set -e" at the start of the script or deal with it when you run the query.

My MySQL is rusty but I checked and...

The first thing I notice is that you do "while [ $result ]", but haven't set $result anywhere - is this present in your environment?

Also, the body of the while[$result] doesn't modify $result, so...

The man page tells you that the result may be in a static buffer. It tells you this to let you know two things:


You do not need to free the result returned from this function. A static buffer...

Where exactly the string is stored is implementation-defined and shouldn't matter to you as an application developer.

sys_errlist is in stdio.h (see 'man sys_errlist'). It is initialized before...

Or you can use the GNU-specific pthread_setaffinity_np() to set CPU affinities on a per-thread basis.

Use:


ifs_modl.open(val_ifmodl.c_str());

Yes, you can - C++ doesn't mandate that you use a newline in this case. However, I find that much harder to read than with a newline and proper spacing, e.g.:


for (int i = 0; i < NL; i++)
...

Wish granted: Your mildly cryptic and explanation-devoid statement simply compels me to ask, what part of the above do you think may be associated with undefined behaviour?

I have to say, posting...

According to the GCC documentation (http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Other-Builtins.html). It could be wrong/omitting some thing though.

Also, if you're using GCC, printf() is a built-in function - though you should get a warning about "incompatible declaration of built-in function printf()" or similar, since your use of the function...

Change your function from returning a Verbosity& (i.e. a reference to a Verbosity) to returning a Verbosity.

For what it's worth, you can do it in C with:


float a, b;
if (sscanf(s, " %f %f", &a, &b) != 2)
printf("Error\n");
else
printf("Values are %f and %f\n", a, b);

When you find solutions to your own problems, please post them (even if it's just a link to a web page that tells you what you want) so others googling in the future aren't left hanging.

I assume...

When a number starts with a leading "0", it's interpreted as an octal number, which can only use digits 0-7 (inclusive). Fix this, recompile and see what the output is.

Also, do you know that...

I like Thinking in Java. IIRC non-current versions are available for free off t'internet.

They could - it's just a matter of style. Using '(1 << 3)' makes it explicitly clear that what you're dealing with a bit. They both mean the same thing to the compiler, it's just what they signal to...

See the man pages for opendir() and readdir().