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Re: glr2.cc compile errors under Windows
From: |
Jot Dot |
Subject: |
Re: glr2.cc compile errors under Windows |
Date: |
Sun, 21 Nov 2021 05:02:14 -0700 (MST) |
> 53 #if defined __cplusplus
> 54 # define YY_CPLUSPLUS __cplusplus
> 55 #else
> 56 # define YY_CPLUSPLUS 199711L
> 57 #endif
>
> Please check why your compiler does not define __cplusplus. Compliant
> compilers
> must define it properly so that we can know what version of C++17 we're in.
> See https://en.cppreference.com/w/cpp/preprocessor/replace#Predefined_macros.
It is defined. Just not what we think it should be. It is 199711L
I've never had to check the value of __cplusplus, just if it existed or not.
After some digging, I found this:
"You need to compile with the /Zc:__cplusplus switch to see the updated value
of the __cplusplus macro. We tried updating the macro by default and discovered
that a lot of code doesn’t compile correctly when we change the value of
__cplusplus"
Source:
https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/
Without this /Zc switch, the Microsoft compiler seems to default __cplusplus to
199711L
This switch is not on by default.
I honestly can't find the words to express how I feel about this.
Sorry to bother you,
Thanks for your help
- glr2.cc compile errors under Windows, Jot Dot, 2021/11/15
- Re: glr2.cc compile errors under Windows, Akim Demaille, 2021/11/20
- Re: glr2.cc compile errors under Windows, Jot Dot, 2021/11/20
- Re: glr2.cc compile errors under Windows, Akim Demaille, 2021/11/21
- Re: glr2.cc compile errors under Windows,
Jot Dot <=
- Re: glr2.cc compile errors under Windows, Hans Åberg, 2021/11/21
- Re: glr2.cc compile errors under Windows, Akim Demaille, 2021/11/21
- Re: glr2.cc compile errors under Windows, Jot Dot, 2021/11/21
- Re: glr2.cc compile errors under Windows, Akim Demaille, 2021/11/21
- Re: glr2.cc compile errors under Windows, Jot Dot, 2021/11/21
- Re: glr2.cc compile errors under Windows, Akim Demaille, 2021/11/21
- Re: glr2.cc compile errors under Windows, Jot Dot, 2021/11/21
- Re: glr2.cc compile errors under Windows, Akim Demaille, 2021/11/22