https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85995
Bug ID: 85995
Summary: GCC defines __STDC__ and __STDC_VERSION__ even when
used with options that break C conformance
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: vincent-gcc at vinc17 dot net
Target Milestone: ---
According to "gcc -dM -E -xc /dev/null" with some additional options, GCC
currently defines __STDC__ and __STDC_VERSION__ even when used with options
that break C conformance, such as -fexcess-precision=fast (which is the
default).
Since these options are known to break C conformance on purpose, __STDC__ and
__STDC_VERSION__ should not be defined in such cases.
