PR c/37481

	* c-typeck.c (digest_init): Check for initializing an array with a
	string literal.

testsuite:
	* gcc.dg/c99-flex-array-7.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@146359 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 01488bf..6b45179 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,11 @@
 2009-04-19  Joseph Myers  <joseph@codesourcery.com>
 
+       PR c/37481
+       * c-typeck.c (digest_init): Check for initializing an array with a
+       string literal.
+
+2009-04-19  Joseph Myers  <joseph@codesourcery.com>
+
        PR c/19771
        * c-semantics.c (pop_stmt_list): Propagate
        STATEMENT_LIST_HAS_LABEL to parent statement list.

diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c
index 821f4ce..96b1a5d 100644 (file)
--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -5254,6 +5254,10 @@ digest_init (tree type, tree init, bool null_pointer_constant,
          expr.original_type = NULL;
          maybe_warn_string_init (type, expr);
 
+         if (TYPE_DOMAIN (type) && !TYPE_MAX_VALUE (TYPE_DOMAIN (type)))
+           pedwarn_init (input_location, OPT_pedantic,
+                         "initialization of a flexible array member");
+
          if (comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (inside_init)),
                         TYPE_MAIN_VARIANT (type)))
            return inside_init;

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index a3e266b..9b66c9d 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,10 @@
 2009-04-19  Joseph Myers  <joseph@codesourcery.com>
 
+       PR c/37481
+       * gcc.dg/c99-flex-array-7.c: New test.
+
+2009-04-19  Joseph Myers  <joseph@codesourcery.com>
+
        PR c/19771
        * gcc.c-torture/execute/vla-dealloc-1.c: New test.
 

diff --git a/gcc/testsuite/gcc.dg/c99-flex-array-7.c b/gcc/testsuite/gcc.dg/c99-flex-array-7.c
new file mode 100644 (file)
index 0000000..8966e6c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/c99-flex-array-7.c
@@ -0,0 +1,17 @@
+/* Initialization of a flexible array member with a string constant
+   must be diagnosed.  PR 37481.  */
+/* { dg-do compile } */
+/* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
+
+struct s { int a; char b[]; };
+
+struct s a = { 0, "" }; /* { dg-error "initialization of a flexible array member" } */
+/* { dg-error "near init" "near init" { target *-*-* } 8 } */
+struct s b = { 0, { 0 } }; /* { dg-error "initialization of a flexible array member" } */
+/* { dg-error "near init" "near init" { target *-*-* } 10 } */
+struct s c = { 0, { } }; /* { dg-error "ISO C forbids empty initializer braces" } */
+struct s d = { .b = "" }; /* { dg-error "initialization of a flexible array member" } */
+/* { dg-error "near init" "near init" { target *-*-* } 13 } */
+struct s e = { .b = { 0 } }; /* { dg-error "initialization of a flexible array member" } */
+/* { dg-error "near init" "near init" { target *-*-* } 15 } */
+struct s f = { .b = { } }; /* { dg-error "ISO C forbids empty initializer braces" } */