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I recently realized that Code::Blocks (I use 16.01) was not configured to use C++11 (nullptr), but that I also need at least C99 to be present instead of ANSI C. For some reason the Have gcc follow the 1999 ISO C language standard [-std=c99] and any of the g++ options can't both be selected at the same time. Also, the ANSI option is separate unlike the C99 one. Is this specific to this (Code::Blocks) version? I checked and this doesn't have the specific solution like others. I understand that I'm setting the std option, but these are two separate binaries and it doesn't seem justified.

Thanks for reaching out.

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    What are you really doing? Do you have a mixed-language project? Or are you trying to mix C and C++ in the same source files? What are the problems, errors, messages, etc. that you get, by the IDE or by the compilers? Commented Apr 1, 2024 at 9:53
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    C++ isn't C and the ANSI C++ standards are not synchronized with ANSI C standards. Mixing C++ and C was already a bad idea in 1992 when "Effective C++" was published, warning against that kind of code. Commented Apr 1, 2024 at 9:57
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    Just ignore the CB's checkboxes, and manually type in the flags. There's an "other flags" textbox somewhere in project settings. Commented Apr 1, 2024 at 9:59
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    When compiling C code use gcc with the appropriate flags for C. When compiling C++ code use g++ with the appropriate flags for C++. Commented Apr 1, 2024 at 10:00
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    If your compiler suite does not support at least C99 and C++11 by default, perhaps consider upgrading it. Commented Apr 1, 2024 at 11:20
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