diff options
Diffstat (limited to 'gcc/cpplib.c')
| -rw-r--r-- | gcc/cpplib.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/cpplib.c b/gcc/cpplib.c index fe96d4ed376..1ce9bbfeca8 100644 --- a/gcc/cpplib.c +++ b/gcc/cpplib.c @@ -242,6 +242,16 @@ get_define_node (pfile) return 0; } + /* In Objective C, some keywords begin with '@', but general identifiers + do not, and you're not allowed to #define them. */ + if (token->val.node->name[0] == '@') + { + cpp_error_with_line (pfile, token->line, token->col, + "\"%s\" cannot be used as a macro name", + token->val.node->name); + return 0; + } + /* Check for poisoned identifiers now. */ if (token->val.node->type == T_POISON) { |