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Silence warning on unused struct parameter

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When generating code for an empty struct, the read_/write_ functions
would print warnings about the unused "s" pointer.  Silence these.
This commit is contained in:
David Lamparter 2017-05-19 09:40:37 +02:00
parent 99e9412c02
commit b0810da2c3
4 changed files with 296 additions and 134 deletions
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16
compiler/capnpc-c.c
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@ -981,13 +981,13 @@ static void define_struct(struct node *n) {
str_addf(&SRC, "\treturn p;\n");
str_addf(&SRC, "}\n");
str_addf(&SRC, "void read_%s(struct %s *s, %s_ptr p) {\n", n->name.str, n->name.str, n->name.str);
str_addf(&SRC, "\tcapn_resolve(&p.p);\n");
str_addf(&SRC, "void read_%s(struct %s *s capnp_unused, %s_ptr p) {\n", n->name.str, n->name.str, n->name.str);
str_addf(&SRC, "\tcapn_resolve(&p.p);\n\tcapnp_use(s);\n");
str_add(&SRC, s.get.str, s.get.len);
str_addf(&SRC, "}\n");
str_addf(&SRC, "void write_%s(const struct %s *s, %s_ptr p) {\n", n->name.str, n->name.str, n->name.str);
str_addf(&SRC, "\tcapn_resolve(&p.p);\n");
str_addf(&SRC, "void write_%s(const struct %s *s capnp_unused, %s_ptr p) {\n", n->name.str, n->name.str, n->name.str);
str_addf(&SRC, "\tcapn_resolve(&p.p);\n\tcapnp_use(s);\n");
str_add(&SRC, s.set.str, s.set.len);
str_addf(&SRC, "}\n");
@ -1360,6 +1360,14 @@ int main() {
p = strrchr(file_node->n.displayName.str, '/');
fprintf(srcf, "#include \"%s%s.h\"\n", p ? p+1 : file_node->n.displayName.str, nameinfix);
fprintf(srcf, "/* AUTO GENERATED - DO NOT EDIT */\n");
fprintf(srcf, "#ifdef __GNUC__\n"
"# define capnp_unused __attribute__((unused))\n"
"# define capnp_use(x) (void) x;\n"
"#else\n"
"# define capnp_unused\n"
"# define capnp_use(x)\n"
"#endif\n\n");
if (g_val0used)
fprintf(srcf, "static const capn_text capn_val0 = {0,\"\",0};\n");