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Fix #2599. The compiler handled all functions returning an int but without a

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"return" statement by silently adding "return 0" instead of emitting a
warning. This is the desired behavior for the "main" function in C99 and
above, but the compiler applied it to all functions.
This commit is contained in:
Kugel Fuhr
2025-05-17 17:18:05 +02:00
parent 84094ae2b3
commit 500887ec23
1 changed files with 3 additions and 1 deletions
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4
src/cc65/function.c
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@@ -636,7 +636,9 @@ void NewFunc (SymEntry* Func, FuncDesc* D)
/* If this is the main function in a C99 environment returning an int, /* If this is the main function in a C99 environment returning an int,
** let it always return zero. Otherwise output a warning. ** let it always return zero. Otherwise output a warning.
*/ */
if (IS_Get (&Standard) >= STD_C99 && GetUnqualRawTypeCode (ReturnType) == T_INT) { if (F_IsMainFunc (CurrentFunc) &&
IS_Get (&Standard) >= STD_C99 &&
GetUnqualRawTypeCode (ReturnType) == T_INT) {
g_getimmed (CF_INT | CF_CONST, 0, 0); g_getimmed (CF_INT | CF_CONST, 0, 0);
} else if (IS_Get (&WarnReturnType)) { } else if (IS_Get (&WarnReturnType)) {
Warning ("Control reaches end of non-void function [-Wreturn-type]"); Warning ("Control reaches end of non-void function [-Wreturn-type]");