https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98021
Bug ID: 98021
Summary: #warning issues redundant diagnostic lines
Product: gcc
Version: 10.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: eggert at cs dot ucla.edu
Target Milestone: ---
I ran into this problem when building something from Gnulib. For the following
program foo.c:
#warning "GCC might issue a bogus -Wreturn-local-addr warning here."
#warning "See <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644>."
The command 'gcc -S foo.c' issues the following diagnostics, which are too
repetitive:
foo.c:1:2: warning: #warning "GCC might issue a bogus -Wreturn-local-addr
warning here." [-Wcpp]
1 | #warning "GCC might issue a bogus -Wreturn-local-addr warning here."
| ^~~~~~~
foo.c:2:2: warning: #warning "See
<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644>." [-Wcpp]
2 | #warning "See <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644>."
| ^~~~~~~
GCC should simply output something like this instead:
foo.c:1:2: warning: GCC might issue a bogus -Wreturn-local-addr warning here.
[-Wcpp]
foo.c:2:2: warning: See <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644>.
[-Wcpp]
