[cling] definitions from mathcalls.h unexpectatly pollute namespace #20700
Description
Check duplicate issues.
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Description
Dear developers,
names such as y0 or y1 cannot be used in an interactive ROOT session due to them being also used internally /usr/include/x86_64-linux-gnu/bits/mathcalls.h. mathcalls.h is probably included by math.h but I do not think, that this should make these variables unusable.
Best regards.
Reproducer
% root -l
root [0] double y1 = 0;
root [1] y1
ROOT_prompt_1:1:1: error: reference to 'y1' is ambiguous
y1
^
ROOT_prompt_0:1:8: note: candidate found by name lookup is '__cling_N50::y1'
double y1 = 0;
^
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:257:13: note: candidate found by name lookup is 'y1'
__MATHCALL (y1,, (_Mdouble_));
^
ROOT version
ROOT v6.36.06
Built for linuxx8664gcc on Nov 26 2025, 12:43:13
From tags/v6-36-06@v6-36-06
With c++ (Debian 15.2.0-9) 15.2.0
Binary directory: /usr/local/opt/root/bin
Installation method
Build from source
Operating system
Debian Sid
Additional context
No response