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46 lines
1.5 KiB
46 lines
1.5 KiB
4 years ago
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2014-10-19 Marek Polacek <polacek@redhat.com>
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PR c/63567
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* c-typeck.c (output_init_element): Allow initializing objects with
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static storage duration with compound literals even in C99 and add
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pedwarn for it.
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--- gcc/c/c-typeck.c
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+++ gcc/c/c-typeck.c
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@@ -8251,11 +8251,14 @@ output_init_element (location_t loc, tree value, tree origtype,
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value = array_to_pointer_conversion (input_location, value);
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if (TREE_CODE (value) == COMPOUND_LITERAL_EXPR
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- && require_constant_value && !flag_isoc99 && pending)
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+ && require_constant_value && pending)
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{
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/* As an extension, allow initializing objects with static storage
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duration with compound literals (which are then treated just as
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the brace enclosed list they contain). */
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+ if (flag_isoc99)
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+ pedwarn_init (input_location, OPT_Wpedantic, "initializer element is not "
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+ "constant");
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tree decl = COMPOUND_LITERAL_EXPR_DECL (value);
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value = DECL_INITIAL (decl);
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}
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--- /dev/null
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+++ gcc/testsuite/gcc.dg/pr63567-3.c
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@@ -0,0 +1,7 @@
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+/* PR c/63567 */
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+/* { dg-do compile } */
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+/* { dg-options "" } */
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+
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+struct T { int i; };
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+struct S { struct T t; };
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+struct S s = { .t = { (int) { 1 } } };
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--- /dev/null
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+++ gcc/testsuite/gcc.dg/pr63567-4.c
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@@ -0,0 +1,7 @@
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+/* PR c/63567 */
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+/* { dg-do compile } */
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+/* { dg-options "-Wpedantic -std=gnu99" } */
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+
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+struct T { int i; };
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+struct S { struct T t; };
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+struct S s = { .t = { (int) { 1 } } }; /* { dg-warning "initializer element is not constant|initialization" } */
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