Version 10.x of the GNU Compiler Collection. The compiler collection provides support for a wide range of languages on an even wider range of platforms.
Version 10.1 was released on 2020-05-07. Version 10.2 was released on 2020-07-23.
See also:
Questions tagged [gcc10]
29 questions
7
votes
2 answers
Array subscript out of bounds when struct has zero length array as only member
In the following code:
#include
template
struct CharArray {
CharArray() {
memset(data_, 0, len);
}
char data_[len];
};
struct Foobar {
CharArray<5> a;
CharArray<3> b;
CharArray<0> c;
};
int main() {
…
Olavi
- 71
- 4
6
votes
0 answers
Why is gcc-10 not seeing keywords related to coroutine ts?
I have installed gcc-10 compiler on my ubuntu 20.04. I needed to test the work of coroutine ts, so I found an example using coroutines and tried to compile it.
exemple:
#include
#include
struct simple {
static inline int…
Anton
- 275
- 1
- 9
4
votes
1 answer
Is it possible to mix the 'range-v3' include(s) with the c++ 'ranges' include?
I have access to GCC 10 and compile with -std=c++20, and need views such as generate cache1, concat etc that aren't slated until possibly C++23.
I wrote a simple program below that outputs '1 2 2 3 3 3' using range-v3. I tried to mix the range-v3…
PantsPlusPlus
- 41
- 3
4
votes
2 answers
std::vector null pointer dereference from g++ -fanalyzer
I was experimenting with -fanalyzer on gcc 10, and managed to get a null-pointer dereference reported in std::vector. But I'm not sure if my code has some mistake?
#include
class Bar
{
public:
explicit Bar()
{
}
int…
Douglas Leeder
- 52,368
- 9
- 94
- 137
4
votes
1 answer
Boost bimap fails to compile with gcc 10, c++20. Looking for temporary fix
With gcc 10.1 and boost 1.73.0, the following code
#include
int main() {
boost::bimap lookup;
}
fails to compile with flags -O2 --std=c++20, but will succeed with flags -O2 -std=c++17 (verified with compiler…
yoyoy
- 375
- 3
- 13
4
votes
2 answers
Does native C have common symbol?
In GCC10, gcc default to fno-common. That means, all tentative defined symbols are not common. I think gcc conforms to the C specification but it seems there are no common symbols in the native C program. Are common symbols only for extension…
eddie kuo
- 716
- 1
- 5
- 13
2
votes
1 answer
Why doesn't gcc10 see the -fcoroutines flag?
I am trying to compile a program with #include header file included in it. But gcc10 throws an error
/usr/include/c++/10/coroutine:295:2: error: #error "the coroutine header requires -fcoroutines"
295 | #error "the coroutine header…
Anton
- 275
- 1
- 9
2
votes
0 answers
Error: cannot compute suffix of object files: cannot compile while building GCC 10 with offloading OpenACC Support to Nvidia GPU
I am trying to install GCC 10 for Nvidia PTX on Ubuntu 20.04 so that I can offload the openACC loads to Nvidia GPU.
I am following the steps given in this link
Installing nvptx-tools
git clone…
hpc_learner
- 21
- 1
2
votes
1 answer
Why does conceptual class template specialization cause an error
I tried to build the following with gcc 10 -std=gnu++20 -fconcepts:
template
class MyClass{ T a; };
template
class MyClass{ T a; };
Why does this code cause the following error?
> declaration of…
Silicomancer
- 8,604
- 10
- 63
- 130
1
vote
1 answer
Bootstrapped GCC is using incorrect search paths
I'm attempting to build GCC 10.5 for an older version of QNX on an x86 platform in an Ubuntu 20.04 x86_64 environment. I downloaded the gcc-10.5.0.tar.xz file from GNU's FTP server and ran the following commands:
tar -xvf gcc-10.5.0.tar.xz
cd…
Matthew Sherwood
- 15
- 5
1
vote
2 answers
workaround for dynamic formatting specs with fmt
Is there a way to use fmt with a spec that is computed at runtime.
Noticed that with gcc 10 this code worked fine but not with modern gcc.
#include
const char* get_spec(bool test)
{ // image this is implemented in some other .cpp…
Mikhail
- 7,749
- 11
- 62
- 136
1
vote
2 answers
Can this incomplete type be improved to work with this C++ concept?
The following code works as designed with g++ 9.3.1 and the old concepts TS. But I haven't gotten it to work with g++ 10.3.1 and the C++ core language version of concepts:
#if __cpp_concepts < 201707
# define CONCEPT concept bool
#else
# define…
dave_k_smith
- 655
- 1
- 7
- 22
1
vote
1 answer
gcc 10 support for atomic shared_ptr
I thought g++ 10.3 should have supported the C++20 feature of atomic shared_ptr? But I am still getting the following error
#include
#include
#include
int main() {
std::atomic> a =…
Kenneth
- 561
- 1
- 5
- 13
1
vote
2 answers
Linux Debian 10 how to use c++ 20
Well unluky as I am i had to a hard drive crash and had to reinstall my Linux. I tried to use vs studio code with C++20 but he does not recognize it. Below is my config.
{
"version": "2.0.0",
"tasks": [
{
"type":…
Nasten1988
- 86
- 8
1
vote
1 answer
atomic_wait and similar methods in c++ 20 and g++ 10.2
I am compiling with g++ 10.2 using -std=c++20 but i get errors like error: ‘atomic_notify_one’ is not a member of ‘std’. I see in the docs that those methods are supported in c++20. Do i miss something?
christk
- 834
- 11
- 23