1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/c90-static-1.c b/gcc/testsuite/gcc.dg/c90-static-1.c
new file mode 100644
index 00000000000..cc6f320c5a2
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/c90-static-1.c
@@ -0,0 +1,22 @@
+/* It is a constraint violation for a static function to be declared
+   but not defined if it is used except in a sizeof expression.  The
+   use of the function simply being unevaluated is not enough.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
+/* { dg-do compile } */
+/* { dg-options "-O2 -std=iso9899:1990 -pedantic-errors" } */
+
+/* Constraint violation (trivial case, where function is used).  */
+static void f0(void); /* { dg-error "used but never defined" } */
+void g0(void) { f0(); }
+
+/* Constraint violation.  */
+static void f1(void); /* { dg-error "used but never defined" } */
+void g1(void) { if (0) { f1(); } }
+
+/* Constraint violation.  */
+static int f2(void); /* { dg-error "used but never defined" } */
+void g2(void) { 0 ? f2() : 0; }
+
+/* OK.  */
+static int f3(void);
+void g3(void) { sizeof(f3()); }