On Mon, Nov 20, 2023 at 10:56:30AM +0100, Florian Weimer wrote:
> gcc/
>
> * doc/invoke.texi (Warning Options): Document changes.
That's pretty vague :). How about "Document that -Wreturn-mismatch is a
permerror in C99."?
> gcc/c/
>
> PR c/96284
> * c-typeck.cc (c_finish_return): Use permerrors
> for OPT_Wreturn_mismatch diagnostics.
>
> gcc/testsuite/
>
> * gcc.dg/permerror-default.c (return_mismatch_1)
> (return_mismatch_2): Expect new permerror.
> * gcc.dg/permerror-gnu89-nopermissive.c (return_mismatch_1):
> Likewise.
> * gcc.dg/permerror-system.c: Likewise.
> * gcc.dg/20030906-1.c: Compile with -fpermissive due to
> expected -Wreturn-mismatch error.
> * gcc.dg/20030906-1a.c: New test. Copied from
> gcc.dg/20030906-1.c. Expect the error.
> * gcc.dg/20030906-2.c: Compile with -fpermissive due to
> expected -Wreturn-mismatch error.
> * gcc.dg/20030906-2a.c: New test. Copied from
> gcc.dg/20030906-2.c. Expect the error.
> * gcc.dg/Wreturn-mismatch-1.c: Compile with -fpermissive due to
> expected -Wreturn-mismatch error.
> * gcc.dg/Wreturn-mismatch-1a.c: New test. Copied from
> gcc.dg/Wreturn-mismatch-1.c. Expect the error.
> * gcc.dg/Wreturn-mismatch-2.c: Compile with -fpermissive due to
> expected -Wreturn-mismatch error.
> * gcc.dg/Wreturn-mismatch-2a.c: New test. Copied from
> gcc.dg/Wreturn-mismatch-2.c. Expect the error.
> * gcc.dg/diagnostic-range-bad-return.c: Compile with
> -fpermissive due to expected -Wreturn-mismatch error.
> * gcc.dg/diagnostic-range-bad-return-2.c: New test.
> Copied from gcc.dg/diagnostic-range-bad-return.c. Expect the
> error.
> * gcc.dg/pr105635-2.c: Expect -Wreturn-mismatch error.
> * gcc.dg/pr23075.c: Build with -fpermissive due to
> expected -Wreturn-mismatch error.
> * gcc.dg/pr23075-2.c: New test. Copied from gcc.dg/pr23075.c.
> Expect the error.
> * gcc.dg/pr29521.c: Compile with -fpermissive due to expected
> -Wreturn-mismatch error.
> * gcc.dg/pr29521-a.c: New test. Copied from gcc.dg/pr29521.c.
> Expect error.
> * gcc.dg/pr67730.c: Compile with -fpermissive due to expected
> -Wreturn-mismatch error.
> * gcc.dg/pr67730-a.c: New test. Copied from
> gcc.dg/pr67730-a.c. Expect error.
> * gcc.target/powerpc/conditional-return.c: Compile with
> -fpermissive due to expected -Wreturn-mismatch error.
There seem to be some extra whitespaces after "expected".
> ---
> gcc/c/c-typeck.cc | 4 +-
> gcc/doc/invoke.texi | 6 ++-
> gcc/testsuite/gcc.dg/20030906-1.c | 2 +-
> gcc/testsuite/gcc.dg/20030906-1a.c | 21 ++++++++
> gcc/testsuite/gcc.dg/20030906-2.c | 2 +-
> gcc/testsuite/gcc.dg/20030906-2a.c | 21 ++++++++
> gcc/testsuite/gcc.dg/Wreturn-mismatch-1.c | 2 +-
> gcc/testsuite/gcc.dg/Wreturn-mismatch-1a.c | 40 ++++++++++++++
> gcc/testsuite/gcc.dg/Wreturn-mismatch-2.c | 2 +-
> gcc/testsuite/gcc.dg/Wreturn-mismatch-2a.c | 41 +++++++++++++++
> .../gcc.dg/diagnostic-range-bad-return-2.c | 52 +++++++++++++++++++
> .../gcc.dg/diagnostic-range-bad-return.c | 2 +-
> gcc/testsuite/gcc.dg/permerror-default.c | 4 +-
> .../gcc.dg/permerror-gnu89-nopermissive.c | 2 +-
> gcc/testsuite/gcc.dg/permerror-system.c | 3 ++
> gcc/testsuite/gcc.dg/pr105635-2.c | 2 +-
> gcc/testsuite/gcc.dg/pr23075-2.c | 14 +++++
> gcc/testsuite/gcc.dg/pr23075.c | 2 +-
> gcc/testsuite/gcc.dg/pr29521-a.c | 15 ++++++
> gcc/testsuite/gcc.dg/pr29521.c | 2 +-
> gcc/testsuite/gcc.dg/pr67730-a.c | 11 ++++
> gcc/testsuite/gcc.dg/pr67730.c | 2 +-
> .../gcc.target/powerpc/conditional-return.c | 2 +-
> 23 files changed, 238 insertions(+), 16 deletions(-)
> create mode 100644 gcc/testsuite/gcc.dg/20030906-1a.c
> create mode 100644 gcc/testsuite/gcc.dg/20030906-2a.c
> create mode 100644 gcc/testsuite/gcc.dg/Wreturn-mismatch-1a.c
> create mode 100644 gcc/testsuite/gcc.dg/Wreturn-mismatch-2a.c
> create mode 100644 gcc/testsuite/gcc.dg/diagnostic-range-bad-return-2.c
> create mode 100644 gcc/testsuite/gcc.dg/pr23075-2.c
> create mode 100644 gcc/testsuite/gcc.dg/pr29521-a.c
> create mode 100644 gcc/testsuite/gcc.dg/pr67730-a.c
>
> diff --git a/gcc/c/c-typeck.cc b/gcc/c/c-typeck.cc
> index c7b35a27e3f..f4b700117ff 100644
> --- a/gcc/c/c-typeck.cc
> +++ b/gcc/c/c-typeck.cc
> @@ -11205,7 +11205,7 @@ c_finish_return (location_t loc, tree retval, tree
> origtype)
> && valtype != NULL_TREE && TREE_CODE (valtype) != VOID_TYPE)
> {
> no_warning = true;
> - if (emit_diagnostic (flag_isoc99 ? DK_PEDWARN : DK_WARNING,
> + if (emit_diagnostic (flag_isoc99 ? DK_PERMERROR : DK_WARNING,
> loc, OPT_Wreturn_mismatch,
> "%<return%> with no value,"
> " in function returning non-void"))
> @@ -11218,7 +11218,7 @@ c_finish_return (location_t loc, tree retval, tree
> origtype)
> current_function_returns_null = 1;
> bool warned_here;
> if (TREE_CODE (TREE_TYPE (retval)) != VOID_TYPE)
> - warned_here = pedwarn
> + warned_here = permerror_opt
> (xloc, OPT_Wreturn_mismatch,
> "%<return%> with a value, in function returning void");
> else
> diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
> index eb7417fd9be..831242d134b 100644
> --- a/gcc/doc/invoke.texi
> +++ b/gcc/doc/invoke.texi
> @@ -6185,6 +6185,7 @@ that have their own flag:
> -Wimplicit-int @r{(C)}
> -Wint-conversion @r{(C)}
> -Wnarrowing @r{(C++)}
> +-Wreturn-mismatch @r{(C)}
> }
>
> The @option{-fpermissive} option is the default for historic C language
> @@ -7375,7 +7376,10 @@ Attempting to use the return value of a
> non-@code{void} function other
> than @code{main} that flows off the end by reaching the closing curly
> brace that terminates the function is undefined.
>
> -This warning is specific to C and enabled by default.
> +This warning is specific to C and enabled by default. In C99 and later
> +language dialects, it is treated as an error. It an be downgraded
an -> can
> +to a warning using @option{-fpermissive} (along with other warnings),
> +or for just this warning, with @option{-Wno-error=return-mismatch}.
>
> @opindex Wreturn-type
> @opindex Wno-return-type
> diff --git a/gcc/testsuite/gcc.dg/20030906-1.c
> b/gcc/testsuite/gcc.dg/20030906-1.c
> index c416f55ee75..6ba5b3d770a 100644
> --- a/gcc/testsuite/gcc.dg/20030906-1.c
> +++ b/gcc/testsuite/gcc.dg/20030906-1.c
> @@ -2,7 +2,7 @@
> Copyright (C) 2003 Free Software Foundation Inc. */
>
> /* { dg-do compile } */
> -/* { dg-options "-O -finline-functions -Wreturn-type" } */
> +/* { dg-options "-fpermissive -O -finline-functions -Wreturn-type" } */
>
> extern int i;
> extern int foo (void);
> diff --git a/gcc/testsuite/gcc.dg/20030906-1a.c
> b/gcc/testsuite/gcc.dg/20030906-1a.c
> new file mode 100644
> index 00000000000..46ca1771a4d
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/20030906-1a.c
> @@ -0,0 +1,21 @@
> +/* Bug 9862 -- Spurious warnings with -finline-functions.
> + Copyright (C) 2003 Free Software Foundation Inc. */
> +
> +/* { dg-do compile } */
> +/* { dg-options "-O -finline-functions -Wreturn-type" } */
> +
> +extern int i;
> +extern int foo (void);
> +extern int bar (void);
> +
> +int foo (void)
> +{
> + if( i ) return 0;
> + else return 1;
> +}
> +
> +int bar (void)
> +{
> + if( i ) return; /* { dg-error "'return' with no value, in function
> returning non-void" } */
> + else return 1;
> +}
> diff --git a/gcc/testsuite/gcc.dg/20030906-2.c
> b/gcc/testsuite/gcc.dg/20030906-2.c
> index 1191133e6a0..a85d91f46f3 100644
> --- a/gcc/testsuite/gcc.dg/20030906-2.c
> +++ b/gcc/testsuite/gcc.dg/20030906-2.c
> @@ -2,7 +2,7 @@
> Copyright (C) 2003 Free Software Foundation Inc. */
>
> /* { dg-do compile } */
> -/* { dg-options "-O -finline-functions -Wreturn-type" } */
> +/* { dg-options "-fpermissive -O -finline-functions -Wreturn-type" } */
>
> extern int i;
> extern int foo (void);
> diff --git a/gcc/testsuite/gcc.dg/20030906-2a.c
> b/gcc/testsuite/gcc.dg/20030906-2a.c
> new file mode 100644
> index 00000000000..a6ffbacb46d
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/20030906-2a.c
> @@ -0,0 +1,21 @@
> +/* Bug 9862 -- Spurious warnings with -finline-functions.
> + Copyright (C) 2003 Free Software Foundation Inc. */
> +
> +/* { dg-do compile } */
> +/* { dg-options "-O -finline-functions -Wreturn-type" } */
> +
> +extern int i;
> +extern int foo (void);
> +extern int bar (void);
> +
> +int foo (void)
> +{
> + if( i ) return; /* { dg-error "'return' with no value, in function
> returning non-void" } */
> + else return 1;
> +}
> +
> +int bar (void)
> +{
> + if( i ) return 0;
> + else return 1;
> +}
> diff --git a/gcc/testsuite/gcc.dg/Wreturn-mismatch-1.c
> b/gcc/testsuite/gcc.dg/Wreturn-mismatch-1.c
> index 3bad847ecf7..aef6782cbeb 100644
> --- a/gcc/testsuite/gcc.dg/Wreturn-mismatch-1.c
> +++ b/gcc/testsuite/gcc.dg/Wreturn-mismatch-1.c
> @@ -1,5 +1,5 @@
> /* { dg-do compile } */
> -/* { dg-options "" } */
> +/* { dg-options "-fpermissive" } */
>
> void f1 (void);
>
> diff --git a/gcc/testsuite/gcc.dg/Wreturn-mismatch-1a.c
> b/gcc/testsuite/gcc.dg/Wreturn-mismatch-1a.c
> new file mode 100644
> index 00000000000..70c7c9ddb86
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/Wreturn-mismatch-1a.c
> @@ -0,0 +1,40 @@
> +/* { dg-do compile } */
> +/* { dg-options "" } */
> +
> +void f1 (void);
> +
> +int
> +f2 (void)
> +{
> + f1 ();
> +}
> +
> +static inline int
> +f3 (void)
> +{
> + f1 ();
> +}
> +
> +void
> +f4 (void)
> +{
> + return 1; /* { dg-error "'return' with a value\[^\n\r\]*-Wreturn-mismatch"
> } */
> +}
> +
> +void
> +f5 (void)
> +{
> + return f1 (); /* { dg-bogus "ISO C" } */
> +}
> +
> +int
> +f6 (void)
> +{
> + return; /* { dg-error "'return' with no value\[^\n\r\]*-Wreturn-mismatch"
> } */
> +}
> +
> +int
> +f7 (void)
> +{
> + return f1 (); /* { dg-error "void value not ignored as it ought to be" } */
> +}
> diff --git a/gcc/testsuite/gcc.dg/Wreturn-mismatch-2.c
> b/gcc/testsuite/gcc.dg/Wreturn-mismatch-2.c
> index 49eb5a5a95c..08811024b7e 100644
> --- a/gcc/testsuite/gcc.dg/Wreturn-mismatch-2.c
> +++ b/gcc/testsuite/gcc.dg/Wreturn-mismatch-2.c
> @@ -1,5 +1,5 @@
> /* { dg-do compile } */
> -/* { dg-options "-Wall" } */
> +/* { dg-options "-fpermissive -Wall" } */
>
> void f1 (void);
>
> diff --git a/gcc/testsuite/gcc.dg/Wreturn-mismatch-2a.c
> b/gcc/testsuite/gcc.dg/Wreturn-mismatch-2a.c
> new file mode 100644
> index 00000000000..836651ed925
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/Wreturn-mismatch-2a.c
> @@ -0,0 +1,41 @@
> +/* { dg-do compile } */
> +/* { dg-options "-Wall" } */
> +
> +void f1 (void);
> +
> +int
> +f2 (void)
> +{
> + f1 ();
> +} /* { dg-warning "control reaches end of non-void\[^\n\r\]*-Wreturn-type" }
> */
> +
> +static inline int
> +f3 (void)
> +{
> + f1 ();
> +} /* { dg-warning "no return statement in function\[^\n\r\]*-Wreturn-type" }
> */
> +
> +void
> +f4 (void)
> +{
> + return 1; /* { dg-error "with a value,\[^\n\r\]*-Wreturn-mismatch" } */
> +}
> +
> +void
> +f5 (void)
> +{
> + return f1 ();
> +}
> +
> +int
> +f6 (void)
> +{
> + return; /* { dg-error "with no value,\[^\n\r\]*Wreturn-mismatch" } */
> +}
> +
> +int
> +f7 (void)
> +{
> + return f1 (); /* { dg-error "void value not ignored as it ought to be" } */
> +} /* { dg-warning "control reaches end of non-void\[^\n\r\]*-Wreturn-type" }
> */
> +
> diff --git a/gcc/testsuite/gcc.dg/diagnostic-range-bad-return-2.c
> b/gcc/testsuite/gcc.dg/diagnostic-range-bad-return-2.c
> new file mode 100644
> index 00000000000..2fe8d341dba
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/diagnostic-range-bad-return-2.c
> @@ -0,0 +1,52 @@
> +/* { dg-options "-fdiagnostics-show-caret -Wreturn-local-addr" } */
> +
> +int *address_of_local (void)
> +{
> + int some_local;
> + return &some_local; /* { dg-warning "function returns address of local
> variable" } */
> +/* { dg-begin-multiline-output "" }
> + return &some_local;
> + ^~~~~~~~~~~
> + { dg-end-multiline-output "" } */
> +}
> +
> +void surplus_return_when_void_1 (void)
> +{
> + return 500; /* { dg-error "'return' with a value, in function returning
> void" } */
> +/* { dg-begin-multiline-output "" }
> + return 500;
> + ^~~
> + { dg-end-multiline-output "" } */
> +/* { dg-begin-multiline-output "" }
> + void surplus_return_when_void_1 (void)
> + ^~~~~~~~~~~~~~~~~~~~~~~~~~
> + { dg-end-multiline-output "" } */
> +}
> +
> +void surplus_return_when_void_2 (int i, int j)
> +{
> + return i * j; /* { dg-error "'return' with a value, in function returning
> void" } */
> +/* { dg-begin-multiline-output "" }
> + return i * j;
> + ~~^~~
> + { dg-end-multiline-output "" } */
> +/* { dg-begin-multiline-output "" }
> + void surplus_return_when_void_2 (int i, int j)
> + ^~~~~~~~~~~~~~~~~~~~~~~~~~
> + { dg-end-multiline-output "" } */
> +}
> +
> +int missing_return_value (void)
> +{
> + return; /* { dg-error "'return' with no value, in function returning
> non-void" } */
> +/* { dg-begin-multiline-output "" }
> + return;
> + ^~~~~~
> + { dg-end-multiline-output "" } */
> +/* { dg-begin-multiline-output "" }
> + int missing_return_value (void)
> + ^~~~~~~~~~~~~~~~~~~~
> + { dg-end-multiline-output "" } */
> +/* TODO: ideally we'd underline the return type i.e. "int", but that
> + location isn't captured. */
> +}
> diff --git a/gcc/testsuite/gcc.dg/diagnostic-range-bad-return.c
> b/gcc/testsuite/gcc.dg/diagnostic-range-bad-return.c
> index 063fdf1f636..b74481b870c 100644
> --- a/gcc/testsuite/gcc.dg/diagnostic-range-bad-return.c
> +++ b/gcc/testsuite/gcc.dg/diagnostic-range-bad-return.c
> @@ -1,4 +1,4 @@
> -/* { dg-options "-fdiagnostics-show-caret -Wreturn-local-addr" } */
> +/* { dg-options "-fpermissive -fdiagnostics-show-caret -Wreturn-local-addr"
> } */
>
> int *address_of_local (void)
> {
> diff --git a/gcc/testsuite/gcc.dg/permerror-default.c
> b/gcc/testsuite/gcc.dg/permerror-default.c
> index 90f2220037c..9ed9814d69e 100644
> --- a/gcc/testsuite/gcc.dg/permerror-default.c
> +++ b/gcc/testsuite/gcc.dg/permerror-default.c
> @@ -75,11 +75,11 @@ incompatible_pointer_types (int flag)
> void
> return_mismatch_1 (void)
> {
> - return 0; /* { dg-warning "'return' with a value, in function returning
> void \\\[-Wreturn-mismatch\\\]" } */
> + return 0; /* { dg-error "'return' with a value, in function returning void
> \\\[-Wreturn-mismatch\\\]" } */
> }
>
> int
> return_mismatch_2 (void)
> {
> - return; /* { dg-warning "return' with no value, in function returning
> non-void \\\[-Wreturn-mismatch\\\]" } */
> + return; /* { dg-error "return' with no value, in function returning
> non-void \\\[-Wreturn-mismatch\\\]" } */
> }
> diff --git a/gcc/testsuite/gcc.dg/permerror-gnu89-nopermissive.c
> b/gcc/testsuite/gcc.dg/permerror-gnu89-nopermissive.c
> index 0780e42b5cc..dc282a44489 100644
> --- a/gcc/testsuite/gcc.dg/permerror-gnu89-nopermissive.c
> +++ b/gcc/testsuite/gcc.dg/permerror-gnu89-nopermissive.c
> @@ -75,7 +75,7 @@ incompatible_pointer_types (int flag)
> void
> return_mismatch_1 (void)
> {
> - return 0; /* { dg-warning "'return' with a value, in function returning
> void \\\[-Wreturn-mismatch\\\]" } */
> + return 0; /* { dg-error "'return' with a value, in function returning void
> \\\[-Wreturn-mismatch\\\]" } */
> }
>
> int
> diff --git a/gcc/testsuite/gcc.dg/permerror-system.c
> b/gcc/testsuite/gcc.dg/permerror-system.c
> index cad48c93f90..f00420358d9 100644
> --- a/gcc/testsuite/gcc.dg/permerror-system.c
> +++ b/gcc/testsuite/gcc.dg/permerror-system.c
> @@ -27,3 +27,6 @@
> /* { dg-error "initialization of 'int \\\*' from 'int' makes pointer from
> integer without a cast \\\[-Wint-conversion\\\]" "" { target *-*-* } 45 } */
> /* { dg-error "assignment to 'int \\\*' from 'int' makes pointer from
> integer without a cast \\\[-Wint-conversion\\\]" "" { target *-*-* } 46 } */
> /* { dg-error "returning 'int \\\*' from a function with return type 'int'
> makes integer from pointer without a cast \\\[-Wint-conversion\\\]" "" {
> target *-*-* } 48 } */
> +
> +/* { dg-error "'return' with a value, in function returning void
> \\\[-Wreturn-mismatch\\\]" "" { target *-*-* } 78 } */
> +/* { dg-error "return' with no value, in function returning non-void
> \\\[-Wreturn-mismatch\\\]" "" { target *-*-* } 84 } */
You may want to use 'return' here too (as in, add the leading ').
> diff --git a/gcc/testsuite/gcc.dg/pr105635-2.c
> b/gcc/testsuite/gcc.dg/pr105635-2.c
> index 807eef0b7cd..019dbc7e557 100644
> --- a/gcc/testsuite/gcc.dg/pr105635-2.c
> +++ b/gcc/testsuite/gcc.dg/pr105635-2.c
> @@ -7,5 +7,5 @@ void foo (int, int[*]); /* { dg-message "previous
> declaration of 'foo' with type
> foo (int x, int y) /* { dg-error "return type defaults to 'int'" } */
> { /* { dg-warning "conflicting types for 'foo'" "" {
> target *-*-* } .-1 } */
> /* { dg-message "declared here" "" { target *-*-* } .-2
> } */
> - return (x >= 0) != (y < 0); /* { dg-warning "'return' with a value,
> in function returning void" } */
> + return (x >= 0) != (y < 0); /* { dg-error "'return' with a value,
> in function returning void" } */
> }
> diff --git a/gcc/testsuite/gcc.dg/pr23075-2.c
> b/gcc/testsuite/gcc.dg/pr23075-2.c
> new file mode 100644
> index 00000000000..0702ddf1a66
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/pr23075-2.c
> @@ -0,0 +1,14 @@
> +/* PR c/23075 */
> +/* { dg-do compile } */
> +/* { dg-options "-O2 -Wreturn-type" } */
> +
> +int
> +foo (void)
> +{
> + return; /* { dg-error "with no value" } */
> +} /* { dg-bogus "control reaches end" } */
> +
> +int
> +bar (void)
> +{
> +} /* { dg-warning "control reaches end" } */
> diff --git a/gcc/testsuite/gcc.dg/pr23075.c b/gcc/testsuite/gcc.dg/pr23075.c
> index 2d85fb0650f..28baf41006a 100644
> --- a/gcc/testsuite/gcc.dg/pr23075.c
> +++ b/gcc/testsuite/gcc.dg/pr23075.c
> @@ -1,6 +1,6 @@
> /* PR c/23075 */
> /* { dg-do compile } */
> -/* { dg-options "-O2 -Wreturn-type" } */
> +/* { dg-options "-O2 -fpermissive -Wreturn-type" } */
>
> int
> foo (void)
> diff --git a/gcc/testsuite/gcc.dg/pr29521-a.c
> b/gcc/testsuite/gcc.dg/pr29521-a.c
> new file mode 100644
> index 00000000000..2c6a48b7e30
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/pr29521-a.c
> @@ -0,0 +1,15 @@
> +/* PR 29521 : warning for return with expression in function returning void
> */
> +/* { dg-do compile } */
> +/* { dg-options "" } */
> +
> +void func (void) { }
> +
> +void func2 (void)
> +{
> + return func ();
> +}
> +
> +void func3 (void)
> +{
> + return 1; /* { dg-error "'return' with a value" } */
> +}
> diff --git a/gcc/testsuite/gcc.dg/pr29521.c b/gcc/testsuite/gcc.dg/pr29521.c
> index b6fb535fab7..cd431514ed2 100644
> --- a/gcc/testsuite/gcc.dg/pr29521.c
> +++ b/gcc/testsuite/gcc.dg/pr29521.c
> @@ -1,6 +1,6 @@
> /* PR 29521 : warning for return with expression in function returning void
> */
> /* { dg-do compile } */
> -/* { dg-options "" } */
> +/* { dg-options "-fpermissive" } */
>
> void func (void) { }
>
> diff --git a/gcc/testsuite/gcc.dg/pr67730-a.c
> b/gcc/testsuite/gcc.dg/pr67730-a.c
> new file mode 100644
> index 00000000000..08737cc9811
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/pr67730-a.c
> @@ -0,0 +1,11 @@
> +/* PR c/67730 */
> +/* { dg-do compile } */
> +/* { dg-options "" } */
> +
> +#include <stddef.h>
> +
> +void
> +fn1 (void)
> +{
> + return NULL; /* { dg-error "10:.return. with a value" } */
> +}
> diff --git a/gcc/testsuite/gcc.dg/pr67730.c b/gcc/testsuite/gcc.dg/pr67730.c
> index 54d73a62cf8..cc51858c531 100644
> --- a/gcc/testsuite/gcc.dg/pr67730.c
> +++ b/gcc/testsuite/gcc.dg/pr67730.c
> @@ -1,6 +1,6 @@
> /* PR c/67730 */
> /* { dg-do compile } */
> -/* { dg-options "" } */
> +/* { dg-options "-fpermissive" } */
>
> #include <stddef.h>
>
> diff --git a/gcc/testsuite/gcc.target/powerpc/conditional-return.c
> b/gcc/testsuite/gcc.target/powerpc/conditional-return.c
> index 6b3ef5f52ca..c6491216752 100644
> --- a/gcc/testsuite/gcc.target/powerpc/conditional-return.c
> +++ b/gcc/testsuite/gcc.target/powerpc/conditional-return.c
> @@ -1,7 +1,7 @@
> /* Check that a conditional return is used. */
>
> /* { dg-do compile } */
> -/* { dg-options "-O2 -w" } */
> +/* { dg-options "-O2 -fpermissive -w" } */
>
> /* { dg-final { scan-assembler {\mbeqlr\M} } } */
>
These seem fine.
Should we have a test for -Wno-error=return-mismatch and -Wno-return-mismatch?
I didn't see those.
Marek
