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ac5a6d9ff5
Problem:
RelWithDebInfo generates redundant flags:
Compilation: /usr/bin/cc -O2 -g -Og -g
The `CMAKE_C_FLAGS_RELWITHDEBINFO` variable is being modified in a way
that caused duplicate `-Og` and `-g` flags to be added. The resulting
flags were `-O2 -g -Og -g`.
- `-Og` (Optimize for debugging) and `-O2` (Optimize for performance)
are different optimization levels. We can't use both at once.
- The duplicate `-g` flag is redundant and no effect.
multiple -O flags has no effect for code, just redundant.
> If you use multiple -O options, with or without level numbers, the last such option is the one that is effective.
https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html
Solution:
Adjust the flags to use the more appropriate `-O2 -g`.
Compilation: /usr/bin/cc -O2 -g
BEFORE:
```
:verbose version
NVIM v0.11.0-dev-1443+ge00cd1ab40
Build type: RelWithDebInfo
LuaJIT 2.1.1734355927
Compilation: /usr/bin/cc -O2 -g -Og -g -flto -fno-fat-lto-ob
jects -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict
...
```
AFTER:
```
:verbose version
NVIM v0.11.0-dev-e00cd1ab4-dirty
Build type: RelWithDebInfo
LuaJIT 2.1.1734355927
Compilation: /usr/bin/cc -O2 -g -flto -fno-fat-lto-objects -
Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-protot
...
```