According to cppreference, the function acosl
should be in the std namespace : https://en.cppreference.com/w/cpp/numeric/math/acos
However, with gcc (or clang), the code below does not compile :
#include <cmath>
int main()
{
long double var = std::acosl(4.0);
return 0;
}
I get the following error message:
gay@latitude-7490:~$ g++ -std=c++11 test.cpp
test.cpp: In function 'int main()':
test.cpp:5:26: error: 'acosl' is not a member of 'std'; did you mean 'acosh'?
5 | long double truc = std::acosl( (long double)4.0);
| ^~~~~
| acosh
What am I missing ? Am I misreading cppreference ?
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