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C++ Module “failed to read module 'std.io.gcm': No such file or directory”
What are the differences between a pointer variable and a reference variable in C++?How can I profile C++ code running on Linux?The Definitive C++ Book Guide and ListWhy can templates only be implemented in the header file?What is the effect of extern “C” in C++?What is the “-->” operator in C++?Why do we need virtual functions in C++?Easiest way to convert int to string in C++C++11 introduced a standardized memory model. What does it mean? And how is it going to affect C++ programming?Why is reading lines from stdin much slower in C++ than Python?
I am trying to test c++ module using the docker image
docker pull benboeckel/cxx-modules-sandbox:latest
docker run -it image_id
sh-4.4$ g++ --version
g++ (GCC) 9.0.1 20190301 (experimental) [c++-modules:20190305-1618]
Then, create a test file.
import std.io;
int main()
return 0;
I got the following error :
sh-4.4$ g++ -o m main.cpp -std=c++2a -fmodules-ts In module imported
at main.cpp:1:1: std.io: error: failed to read module 'std.io.gcm': No
such file or directory std.io: fatal error: jumping off the crazy
train to crashville compilation terminated.
update:
The following code works fine.
//m.cpp
export module M;
export int sq(int i) return i*i;
//main.cpp
import M;
int main() return sq(9);
g++ -o m main.cpp m.cpp -std=c++2a -fmodules-ts
c++ c++20
asked Mar 7 at 1:29
caminocamino
3,873114170
add a comment |
I am trying to test c++ module using the docker image
docker pull benboeckel/cxx-modules-sandbox:latest
docker run -it image_id
sh-4.4$ g++ --version
g++ (GCC) 9.0.1 20190301 (experimental) [c++-modules:20190305-1618]
Then, create a test file.
import std.io;
int main()
return 0;
I got the following error :
sh-4.4$ g++ -o m main.cpp -std=c++2a -fmodules-ts In module imported
at main.cpp:1:1: std.io: error: failed to read module 'std.io.gcm': No
such file or directory std.io: fatal error: jumping off the crazy
train to crashville compilation terminated.
update:
The following code works fine.
//m.cpp
export module M;
export int sq(int i) return i*i;
//main.cpp
import M;
int main() return sq(9);
g++ -o m main.cpp m.cpp -std=c++2a -fmodules-ts
c++ c++20
asked Mar 7 at 1:29
caminocamino
3,873114170
What isstd.io? Is that part of GCC's modules implementation?
– Nicol Bolas
Mar 7 at 6:00
@NicolBolas I copy the code from c++ module ts: open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4720.pdf
– camino
Mar 7 at 13:55
2
That doesn't answer the question. Does GCC provide astd.iomodule? If not, then you can't import it.
– Nicol Bolas
Mar 7 at 14:38
@NicolBolas Thanks, hope I can find it in its documents
– camino
Mar 7 at 16:32
@NicolBolas I think in this docker image, the std.io is not ready. But the compiler do support module :).
– camino
Mar 8 at 1:26
add a comment |
I am trying to test c++ module using the docker image
docker pull benboeckel/cxx-modules-sandbox:latest
docker run -it image_id
sh-4.4$ g++ --version
g++ (GCC) 9.0.1 20190301 (experimental) [c++-modules:20190305-1618]
Then, create a test file.
import std.io;
int main()
return 0;
I got the following error :
sh-4.4$ g++ -o m main.cpp -std=c++2a -fmodules-ts In module imported
at main.cpp:1:1: std.io: error: failed to read module 'std.io.gcm': No
such file or directory std.io: fatal error: jumping off the crazy
train to crashville compilation terminated.
update:
The following code works fine.
//m.cpp
export module M;
export int sq(int i) return i*i;
//main.cpp
import M;
int main() return sq(9);
g++ -o m main.cpp m.cpp -std=c++2a -fmodules-ts
c++ c++20
asked Mar 7 at 1:29
caminocamino
3,873114170
I am trying to test c++ module using the docker image
docker pull benboeckel/cxx-modules-sandbox:latest
docker run -it image_id
sh-4.4$ g++ --version
g++ (GCC) 9.0.1 20190301 (experimental) [c++-modules:20190305-1618]
Then, create a test file.
import std.io;
int main()
return 0;
I got the following error :
sh-4.4$ g++ -o m main.cpp -std=c++2a -fmodules-ts In module imported
at main.cpp:1:1: std.io: error: failed to read module 'std.io.gcm': No
such file or directory std.io: fatal error: jumping off the crazy
train to crashville compilation terminated.
update:
The following code works fine.
//m.cpp
export module M;
export int sq(int i) return i*i;
//main.cpp
import M;
int main() return sq(9);
g++ -o m main.cpp m.cpp -std=c++2a -fmodules-ts
c++ c++20
c++ c++20
asked Mar 7 at 1:29
caminocamino
3,873114170
asked Mar 7 at 1:29
caminocamino
3,873114170
edited Mar 8 at 1:20
camino
asked Mar 7 at 1:29
caminocamino
3,873114170
asked Mar 7 at 1:29
caminocamino
3,873114170
asked Mar 7 at 1:29
caminocamino
3,873114170
3,873114170
What isstd.io? Is that part of GCC's modules implementation?
– Nicol Bolas
Mar 7 at 6:00
@NicolBolas I copy the code from c++ module ts: open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4720.pdf
– camino
Mar 7 at 13:55
2
That doesn't answer the question. Does GCC provide astd.iomodule? If not, then you can't import it.
– Nicol Bolas
Mar 7 at 14:38
@NicolBolas Thanks, hope I can find it in its documents
– camino
Mar 7 at 16:32
@NicolBolas I think in this docker image, the std.io is not ready. But the compiler do support module :).
– camino
Mar 8 at 1:26
add a comment |
What isstd.io? Is that part of GCC's modules implementation?
– Nicol Bolas
Mar 7 at 6:00
@NicolBolas I copy the code from c++ module ts: open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4720.pdf
– camino
Mar 7 at 13:55
2
That doesn't answer the question. Does GCC provide astd.iomodule? If not, then you can't import it.
– Nicol Bolas
Mar 7 at 14:38
@NicolBolas Thanks, hope I can find it in its documents
– camino
Mar 7 at 16:32
@NicolBolas I think in this docker image, the std.io is not ready. But the compiler do support module :).
– camino
Mar 8 at 1:26
What is
std.io? Is that part of GCC's modules implementation?– Nicol Bolas
Mar 7 at 6:00
What is
std.io? Is that part of GCC's modules implementation?– Nicol Bolas
Mar 7 at 6:00
@NicolBolas I copy the code from c++ module ts: open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4720.pdf
– camino
Mar 7 at 13:55
@NicolBolas I copy the code from c++ module ts: open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4720.pdf
– camino
Mar 7 at 13:55
2
2
That doesn't answer the question. Does GCC provide a
std.io module? If not, then you can't import it.– Nicol Bolas
Mar 7 at 14:38
That doesn't answer the question. Does GCC provide a
std.io module? If not, then you can't import it.– Nicol Bolas
Mar 7 at 14:38
@NicolBolas Thanks, hope I can find it in its documents
– camino
Mar 7 at 16:32
@NicolBolas Thanks, hope I can find it in its documents
– camino
Mar 7 at 16:32
@NicolBolas I think in this docker image, the std.io is not ready. But the compiler do support module :).
– camino
Mar 8 at 1:26
@NicolBolas I think in this docker image, the std.io is not ready. But the compiler do support module :).
– camino
Mar 8 at 1:26
add a comment |
1 Answer
1
active
oldest
votes
Modules got added to the C++20 draft, but it doesn't imply that the standard library is now modularized. There's an effort to modularize it, but we don't have anything concrete so far:
While we appear to have achieved consensus on a design for the modules language feature, our plan for how and when the C++ standard library will be modularized are not as mature. Some proposals have been made ([P0581R1] and [P1212R0]) and preliminary discussions have taken place ([2018-Jacksonville-LEWG-P0581R0-Minutes] and [2018-San-Diego-EWG-P1212R0-Minutes]), but we haven’t committed to a path yet. Given that the C++20 cycle is nearly over, it’s time for us to make a decision on our strategy for standard library modules in C++20.
answered Mar 9 at 16:49
Mário FeroldiMário Feroldi
2,10221340
Thanks! I will looking forward to using it. It is a really nice feature.
– camino
Mar 9 at 17:51
add a comment |
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1 Answer
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1 Answer
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active
oldest
votes
active
oldest
votes
active
oldest
votes
Modules got added to the C++20 draft, but it doesn't imply that the standard library is now modularized. There's an effort to modularize it, but we don't have anything concrete so far:
While we appear to have achieved consensus on a design for the modules language feature, our plan for how and when the C++ standard library will be modularized are not as mature. Some proposals have been made ([P0581R1] and [P1212R0]) and preliminary discussions have taken place ([2018-Jacksonville-LEWG-P0581R0-Minutes] and [2018-San-Diego-EWG-P1212R0-Minutes]), but we haven’t committed to a path yet. Given that the C++20 cycle is nearly over, it’s time for us to make a decision on our strategy for standard library modules in C++20.
answered Mar 9 at 16:49
Mário FeroldiMário Feroldi
2,10221340
Thanks! I will looking forward to using it. It is a really nice feature.
– camino
Mar 9 at 17:51
add a comment |
Modules got added to the C++20 draft, but it doesn't imply that the standard library is now modularized. There's an effort to modularize it, but we don't have anything concrete so far:
While we appear to have achieved consensus on a design for the modules language feature, our plan for how and when the C++ standard library will be modularized are not as mature. Some proposals have been made ([P0581R1] and [P1212R0]) and preliminary discussions have taken place ([2018-Jacksonville-LEWG-P0581R0-Minutes] and [2018-San-Diego-EWG-P1212R0-Minutes]), but we haven’t committed to a path yet. Given that the C++20 cycle is nearly over, it’s time for us to make a decision on our strategy for standard library modules in C++20.
answered Mar 9 at 16:49
Mário FeroldiMário Feroldi
2,10221340
Thanks! I will looking forward to using it. It is a really nice feature.
– camino
Mar 9 at 17:51
add a comment |
Modules got added to the C++20 draft, but it doesn't imply that the standard library is now modularized. There's an effort to modularize it, but we don't have anything concrete so far:
While we appear to have achieved consensus on a design for the modules language feature, our plan for how and when the C++ standard library will be modularized are not as mature. Some proposals have been made ([P0581R1] and [P1212R0]) and preliminary discussions have taken place ([2018-Jacksonville-LEWG-P0581R0-Minutes] and [2018-San-Diego-EWG-P1212R0-Minutes]), but we haven’t committed to a path yet. Given that the C++20 cycle is nearly over, it’s time for us to make a decision on our strategy for standard library modules in C++20.
answered Mar 9 at 16:49
Mário FeroldiMário Feroldi
2,10221340
Modules got added to the C++20 draft, but it doesn't imply that the standard library is now modularized. There's an effort to modularize it, but we don't have anything concrete so far:
While we appear to have achieved consensus on a design for the modules language feature, our plan for how and when the C++ standard library will be modularized are not as mature. Some proposals have been made ([P0581R1] and [P1212R0]) and preliminary discussions have taken place ([2018-Jacksonville-LEWG-P0581R0-Minutes] and [2018-San-Diego-EWG-P1212R0-Minutes]), but we haven’t committed to a path yet. Given that the C++20 cycle is nearly over, it’s time for us to make a decision on our strategy for standard library modules in C++20.
answered Mar 9 at 16:49
Mário FeroldiMário Feroldi
2,10221340
answered Mar 9 at 16:49
Mário FeroldiMário Feroldi
2,10221340
answered Mar 9 at 16:49
Mário FeroldiMário Feroldi
2,10221340
answered Mar 9 at 16:49
Mário FeroldiMário Feroldi
2,10221340
2,10221340
Thanks! I will looking forward to using it. It is a really nice feature.
– camino
Mar 9 at 17:51
add a comment |
Thanks! I will looking forward to using it. It is a really nice feature.
– camino
Mar 9 at 17:51
Thanks! I will looking forward to using it. It is a really nice feature.
– camino
Mar 9 at 17:51
Thanks! I will looking forward to using it. It is a really nice feature.
– camino
Mar 9 at 17:51
add a comment |
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What is
std.io? Is that part of GCC's modules implementation?– Nicol Bolas
Mar 7 at 6:00
@NicolBolas I copy the code from c++ module ts: open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4720.pdf
– camino
Mar 7 at 13:55
2
That doesn't answer the question. Does GCC provide a
std.iomodule? If not, then you can't import it.– Nicol Bolas
Mar 7 at 14:38
@NicolBolas Thanks, hope I can find it in its documents
– camino
Mar 7 at 16:32
@NicolBolas I think in this docker image, the std.io is not ready. But the compiler do support module :).
– camino
Mar 8 at 1:26