For questions related to the GNU gcc compiler or suite, 5.2.x versions.
Questions tagged [gcc5.2]
14 questions
8
votes
1 answer
C++11 regex::icase inconsistent behavior
Coming from perl-like regular expressions, I expected the below code to match regex'es in all 8 cases. But it doesn't. What am I missing?
#include
#include
#include
using namespace std;
void check(const string& s, regex…
glexey
- 811
- 7
- 25
6
votes
3 answers
No warning when returning NULL with gcc
Using gcc 5.2.0, I noticed that this code does not generate a warning:
#include
int function(void)
{
return NULL;
}
void procedure(void)
{
return NULL;
}
I used the flags -Wall -Wextra -std=c99 -pedantic and I am running…
damwdan
- 71
- 5
4
votes
1 answer
std::string & as template parameter and abi_tag in gcc 5
Consider the following piece of code (test1.cpp):
#include
extern std::string test_string;
template
class test{
public:
static void bar(){ }
};
std::string test_string("test string");
void…
Alexander Lelyakin
- 193
- 1
- 5
4
votes
8 answers
How to use C11 standard in Code::Blocks
Like the Title says I need to make code::blocks to work with C11 and I can't figure out how to do it.
I went to settings => compiler settings => Other options and I added -std=c11 and tried also with -std=gnu11, both doesn't seems to work.
I…
Michi
- 5,175
- 7
- 33
- 58
3
votes
1 answer
template being deduced as wrong type with template variable
So I have the following test code:
struct empty_value{
template
T as(){ return T(0); }
};
template
auto empty_func(empty_value lhs, empty_value rhs, F f) -> decltype(f(lhs.as(),…
RamblingMad
- 5,332
- 2
- 24
- 48
2
votes
1 answer
C++ lambda callbacks
I am trying to make an HTTP class, and I want to use C++11 (not C++14 yet) callbacks via lambdas. I have 2 mockups available, the first one works... but looks ugly. The second one I am aiming, is not compiling (error at the end).
I cannot use…
elcuco
- 8,948
- 9
- 47
- 69
1
vote
0 answers
idirafter flag inserts a new character while macro expansion in gcc 5.2.0
During the compilation of a C file I used idirafter flag to mention the directory to look if it does not find the file in any of the locations mentioned using -I. To simulate the problem I have written a small sample program which is as below.
I am…
Srijith
- 11
- 1
1
vote
1 answer
Linker error while building with MSVC 2015 (other CC are OK)
Here is the MCVE:
#include
#include
using namespace std;
class Obj {
public:
Obj() { cout << "Obj()" << endl; }
~Obj() { cout << "~Obj()" << endl; }
void* operator new(size_t sz){
return ::operator new(sz);
…
Dmitry Sokolov
- 3,118
- 1
- 30
- 35
1
vote
0 answers
linux kernel undefined reference to '__compat_exports_start'
The same situation like in the last question. An android kernel (3.4.0), that I try to compile with gcc 5.2 (Linaro toolchain).
arch/arm/mach-msm/built-in.o:memory.c:function check_for_compat: error: undefined reference to…
David Müller
- 51
- 7
0
votes
1 answer
ASAN with gcc-5.2 not intercepting exceptions
I was using the ASAN with gcc-4.8.2 for last 2 years without any issue. We moved to gcc-5.2 to use the new features like LSAN. After building the application with gcc-5.2 its not able to intercept the __cxa_throw anymore leading to a crash, found…
0
votes
1 answer
proper linking of PATH and LD_LIBRARY_PATH after gcc-5.2 install in own directory
I just compiled and installed gcc-5.2. I did not have root access so I installed it in my own directory. I forget at the end what I am meant to link through LD_LIBRARY_PATH and PATH
setenv LD_LIBRARY_PATH…
Griff
- 2,064
- 5
- 31
- 47
0
votes
2 answers
Implicit declaration of function ‘fgetc_unlocked’, using gcc 5.2
I have the following code:
#include
int main() {
putc_unlocked('a', stdout);
return 0;
}
I get no error when I compile it using gcc file.c, however, if I use gcc -std=c11 file.c, I get:
file.c: In function ‘main’:
file.c:4:2:…
dario2994
- 48
- 6
0
votes
1 answer
How can I get the exact value of a double?
I have a situation where:
void foo( const double d )
{
const double rounded_2_decimals = std::round(d*100.0) / 100.0;
std::cout << "d=" << d << std::endl;
std::cout << "r=" << rounded_2_decimals << std::endl;
}
When printed, d=3.125,…
Stéphane
- 19,459
- 24
- 95
- 136
0
votes
0 answers
Error passing argument 2 of 'crypto_compress_setup' discards 'const' qualifier from pointer target type
I try to compile an android kernel with gcc 5.2 and i fixed all errors, except this:
crypto/testmgr.c:1112:36: warning: passing argument 2 of 'crypto_compress_setup' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
error,…
David Müller
- 51
- 7