VS2017 'M_PI': undeclared identifier [duplicate]
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This question already has an answer here:
M_PI works with math.h but not with cmath in Visual Studio
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I'm trying to compile a library in C++ as dll windows with visual studio 2017.
I have all C++/H compiled with clang 3.8 for android and it works.
I created a new project as dynamic library with LLVM as platform toolset. Now I'm trying to build but there is an error :
Error C2065 'M_PI': undeclared identifier
This error is present in many .cpp files. All linked .h contains :
#include <cmath>
I replaced by :
#define _USE_MATH_DEFINES // for C++
#include <cmath>
But it change nothing. What can I do ?
c++ visual-studio-2017 llvm
asked Nov 20 at 14:59
A.Pissicat
7131833
marked as duplicate by MrTux, Paul R c++
Users with the c++ badge can single-handedly close c++ questions as duplicates and reopen them as needed.
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Nov 20 at 15:02
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
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up vote
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down vote
favorite
This question already has an answer here:
M_PI works with math.h but not with cmath in Visual Studio
4 answers
I'm trying to compile a library in C++ as dll windows with visual studio 2017.
I have all C++/H compiled with clang 3.8 for android and it works.
I created a new project as dynamic library with LLVM as platform toolset. Now I'm trying to build but there is an error :
Error C2065 'M_PI': undeclared identifier
This error is present in many .cpp files. All linked .h contains :
#include <cmath>
I replaced by :
#define _USE_MATH_DEFINES // for C++
#include <cmath>
But it change nothing. What can I do ?
c++ visual-studio-2017 llvm
asked Nov 20 at 14:59
A.Pissicat
7131833
marked as duplicate by MrTux, Paul R c++
Users with the c++ badge can single-handedly close c++ questions as duplicates and reopen them as needed.
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Nov 20 at 15:02
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
1
Possibly replicated
– felix
Nov 20 at 15:01
Also see Best platform independent pi constant?
– Shafik Yaghmour
Nov 21 at 2:38
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
This question already has an answer here:
M_PI works with math.h but not with cmath in Visual Studio
4 answers
I'm trying to compile a library in C++ as dll windows with visual studio 2017.
I have all C++/H compiled with clang 3.8 for android and it works.
I created a new project as dynamic library with LLVM as platform toolset. Now I'm trying to build but there is an error :
Error C2065 'M_PI': undeclared identifier
This error is present in many .cpp files. All linked .h contains :
#include <cmath>
I replaced by :
#define _USE_MATH_DEFINES // for C++
#include <cmath>
But it change nothing. What can I do ?
c++ visual-studio-2017 llvm
asked Nov 20 at 14:59
A.Pissicat
7131833
This question already has an answer here:
M_PI works with math.h but not with cmath in Visual Studio
4 answers
I'm trying to compile a library in C++ as dll windows with visual studio 2017.
I have all C++/H compiled with clang 3.8 for android and it works.
I created a new project as dynamic library with LLVM as platform toolset. Now I'm trying to build but there is an error :
Error C2065 'M_PI': undeclared identifier
This error is present in many .cpp files. All linked .h contains :
#include <cmath>
I replaced by :
#define _USE_MATH_DEFINES // for C++
#include <cmath>
But it change nothing. What can I do ?
This question already has an answer here:
M_PI works with math.h but not with cmath in Visual Studio
4 answers
c++ visual-studio-2017 llvm
c++ visual-studio-2017 llvm
asked Nov 20 at 14:59
A.Pissicat
7131833
asked Nov 20 at 14:59
A.Pissicat
7131833
asked Nov 20 at 14:59
A.Pissicat
7131833
asked Nov 20 at 14:59
A.Pissicat
7131833
asked Nov 20 at 14:59
A.Pissicat
7131833
7131833
marked as duplicate by MrTux, Paul R c++
Users with the c++ badge can single-handedly close c++ questions as duplicates and reopen them as needed.
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Nov 20 at 15:02
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
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Nov 20 at 15:02
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
1
Possibly replicated
– felix
Nov 20 at 15:01
Also see Best platform independent pi constant?
– Shafik Yaghmour
Nov 21 at 2:38
add a comment |
1
Possibly replicated
– felix
Nov 20 at 15:01
Also see Best platform independent pi constant?
– Shafik Yaghmour
Nov 21 at 2:38
1
1
Possibly replicated
– felix
Nov 20 at 15:01
Possibly replicated
– felix
Nov 20 at 15:01
Also see Best platform independent pi constant?
– Shafik Yaghmour
Nov 21 at 2:38
Also see Best platform independent pi constant?
– Shafik Yaghmour
Nov 21 at 2:38
add a comment |
1 Answer
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up vote
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This is a known issue, try defining _USE_MATH_DEFINES as a definition in your project properties instead of the file itself.
This can be found in project properties -> C/C++ -> Preprocessor -> Preprocessor definitions.
answered Nov 20 at 15:03
Sombrero Chicken
22.9k33075
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
This is a known issue, try defining _USE_MATH_DEFINES as a definition in your project properties instead of the file itself.
This can be found in project properties -> C/C++ -> Preprocessor -> Preprocessor definitions.
answered Nov 20 at 15:03
Sombrero Chicken
22.9k33075
add a comment |
up vote
2
down vote
accepted
This is a known issue, try defining _USE_MATH_DEFINES as a definition in your project properties instead of the file itself.
This can be found in project properties -> C/C++ -> Preprocessor -> Preprocessor definitions.
answered Nov 20 at 15:03
Sombrero Chicken
22.9k33075
add a comment |
up vote
2
down vote
accepted
up vote
2
down vote
accepted
This is a known issue, try defining _USE_MATH_DEFINES as a definition in your project properties instead of the file itself.
This can be found in project properties -> C/C++ -> Preprocessor -> Preprocessor definitions.
answered Nov 20 at 15:03
Sombrero Chicken
22.9k33075
This is a known issue, try defining _USE_MATH_DEFINES as a definition in your project properties instead of the file itself.
This can be found in project properties -> C/C++ -> Preprocessor -> Preprocessor definitions.
answered Nov 20 at 15:03
Sombrero Chicken
22.9k33075
answered Nov 20 at 15:03
Sombrero Chicken
22.9k33075
answered Nov 20 at 15:03
Sombrero Chicken
22.9k33075
answered Nov 20 at 15:03
Sombrero Chicken
22.9k33075
22.9k33075
add a comment |
add a comment |
1
Possibly replicated
– felix
Nov 20 at 15:01
Also see Best platform independent pi constant?
– Shafik Yaghmour
Nov 21 at 2:38