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re PR c/58286 (Need option to make incompatible pointer type warnings into compiler errors)

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PR c/58286
	* doc/invoke.texi: Document -Wincompatible-pointer-types.
c-family/
	* c.opt (Wincompatible-pointer-types): New option.
c/
	* c-typeck.c (convert_for_assignment): Pass
	OPT_Wincompatible_pointer_types instead of 0 to WARN_FOR_ASSIGNMENT.
testsuite/
	* gcc.dg/Wincompatible-pointer-types.c: New test.

From-SVN: r212192
This commit is contained in:
Marek Polacek 2014-07-01 08:31:58 +00:00 committed by Marek Polacek
parent e55637b715
commit d5c3d343bd
8 changed files with 58 additions and 5 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2014-07-01 Marek Polacek <polacek@redhat.com>
PR c/58286
* doc/invoke.texi: Document -Wincompatible-pointer-types.
2014-07-01 Martin Liska <mliska@suse.cz>
IPA REF alias refactoring

5
gcc/c-family/ChangeLog
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@ -1,3 +1,8 @@
2014-07-01 Marek Polacek <polacek@redhat.com>
PR c/58286
* c.opt (Wincompatible-pointer-types): New option.
2014-06-30 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/51400

4
gcc/c-family/c.opt
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@ -443,6 +443,10 @@ Wignored-qualifiers
C C++ Var(warn_ignored_qualifiers) Warning EnabledBy(Wextra)
Warn whenever type qualifiers are ignored.
Wincompatible-pointer-types
C ObjC Var(warn_incompatible_pointer_types) Init(1) Warning
Warn when there is a conversion between pointers that have incompatible types
Winit-self
C ObjC C++ ObjC++ Var(warn_init_self) Warning LangEnabledBy(C++ ObjC++,Wall)
Warn about variables which are initialized to themselves

6
gcc/c/ChangeLog
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@ -1,3 +1,9 @@
2014-07-01 Marek Polacek <polacek@redhat.com>
PR c/58286
* c-typeck.c (convert_for_assignment): Pass
OPT_Wincompatible_pointer_types instead of 0 to WARN_FOR_ASSIGNMENT.
2014-06-30 Marek Polacek <polacek@redhat.com>
* c-decl.c (grokdeclarator): Don't instrument VLAs if the function

3
gcc/c/c-typeck.c
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@ -6189,7 +6189,8 @@ convert_for_assignment (location_t location, location_t expr_loc, tree type,
else
/* Avoid warning about the volatile ObjC EH puts on decls. */
if (!objc_ok)
WARN_FOR_ASSIGNMENT (location, expr_loc, 0,
WARN_FOR_ASSIGNMENT (location, expr_loc,
OPT_Wincompatible_pointer_types,
G_("passing argument %d of %qE from "
"incompatible pointer type"),
G_("assignment from incompatible pointer type"),

14
gcc/doc/invoke.texi
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@ -251,7 +251,7 @@ Objective-C and Objective-C++ Dialects}.
-Wno-format-contains-nul -Wno-format-extra-args -Wformat-nonliteral @gol
-Wformat-security -Wformat-signedness -Wformat-y2k @gol
-Wframe-larger-than=@var{len} -Wno-free-nonheap-object -Wjump-misses-init @gol
-Wignored-qualifiers @gol
-Wignored-qualifiers -Wincompatible-pointer-types @gol
-Wimplicit -Wimplicit-function-declaration -Wimplicit-int @gol
-Winit-self -Winline @gol
-Wno-int-to-pointer-cast -Wno-invalid-offsetof @gol
@ -4199,14 +4199,20 @@ This option is only active when @option{-ftree-vrp} is active
(default for @option{-O2} and above). It warns about subscripts to arrays
that are always out of bounds. This warning is enabled by @option{-Wall}.
@item -Wno-discarded-qualifiers
@item -Wno-discarded-qualifiers @r{(C and Objective-C only)}
@opindex Wno-discarded-qualifiers
@opindex Wdiscarded-qualifiers
Do not warn if type qualifiers on pointers are being discarded.
Typically, the compiler will warn if a @code{const char *} variable is
passed to a function that takes @code{char *} parameter. This option
can be used to suppress such a warning. This warning is only supported
for C.
can be used to suppress such a warning.
@item -Wno-incompatible-pointer-types @r{(C and Objective-C only)}
@opindex Wno-incompatible-pointer-types
@opindex Wincompatible-pointer-types
Do not warn when there is a conversion between pointers that have incompatible
types. This warning is for cases not covered by @option{-Wno-pointer-sign},
which warns for pointer argument passing or assignment with different signedness
@item -Wno-div-by-zero
@opindex Wno-div-by-zero

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2014-07-01 Marek Polacek <polacek@redhat.com>
PR c/58286
* gcc.dg/Wincompatible-pointer-types.c: New test.
2014-06-30 David Holsgrove <david.holsgrove@xilinx.com>
* gcc/testsuite/lib/scanasm.exp (dg-function-on-line): Add

21
gcc/testsuite/gcc.dg/Wincompatible-pointer-types.c Normal file
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@ -0,0 +1,21 @@
/* PR c/58286 */
/* { dg-do compile } */
/* { dg-options "-Wno-incompatible-pointer-types" } */
void
fn2 (short *s, long *l)
{
}
unsigned *
fn1 (void)
{
int (*fpi) (int);
int (*fpd) (double) = fpi;
fpi = fpd;
char *di;
float *dp = &di;
di = dp;
fn2 (dp, di);
return dp;
}