[Bug c++/89870] New: C++ suggest header for abort()

[jg at jguk dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89870

            Bug ID: 89870
           Summary: C++ suggest header for abort()
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jg at jguk dot org
  Target Milestone: ---

trunk gcc can suggest the missing #include <stdlib.h> header if the following
code is compiled as C.

trunk g++ does not suggest missing #include <cstdlib>  (C++ style) header in
the following code compiled as C++.

Can the C++ header suggestion pick this up somehow?

int main()
{
    abort();
}

Tested on godbolt trunk today

[C++]
#1 with x86-64 gcc (trunk)
<source>: In function 'int main()':

<source>:3:5: error: 'abort' was not declared in this scope

    3 |     abort();

      |     ^~~~~

Compiler returned: 1



[C]
#1 with x86-64 gcc (trunk)
<source>: In function 'main':

<source>:3:5: warning: implicit declaration of function 'abort'
[-Wimplicit-function-declaration]

    3 |     abort();

      |     ^~~~~

<source>:3:5: warning: incompatible implicit declaration of built-in function
'abort'

<source>:1:1: note: include '<stdlib.h>' or provide a declaration of 'abort'

  +++ |+#include <stdlib.h>

    1 | int main()

Compiler returned: 0