VLA inserts a call to alloca via enum TOK_alloca, but TOK_alloca only exists on I386 and X86_64 targets. This patch just emits an error at compile-time if someone tries to compile some VLA code for a TOK_alloca-less target. The best solution might be to just push the problem to link-time, since the existence-or-not of a alloca implementation can only be determined by linking. It seems like just declaring TOK_alloca unconditionally would achieve that, but for now, this at least gets the cross compilers to build.
Unified · Split
| @@ -4863,6 +4863,7 @@ static void decl_initializer(CType *type, Section *sec, unsigned long c, · 4862 unmodified lines | |||
| 4863 | CType *t1; | 4863 | CType *t1; |
| 4864 | 4864 | ||
| 4865 | if (type->t & VT_VLA) { | 4865 | if (type->t & VT_VLA) { |
| 4866 | #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64 | ||
| 4866 | int a; | 4867 | int a; |
| 4867 | CValue retcval; | 4868 | CValue retcval; |
| 4868 | 4869 | ||
| @@ -4877,6 +4878,9 @@ static void decl_initializer(CType *type, Section *sec, unsigned long c, · 8 unmodified lines | |||
| 4877 | vswap(); | 4878 | vswap(); |
| 4878 | vstore(); | 4879 | vstore(); |
| 4879 | vpop(); | 4880 | vpop(); |
| 4881 | #else | ||
| 4882 | error("variable length arrays unsupported for this target"); | ||
| 4883 | #endif | ||
| 4880 | } else if (type->t & VT_ARRAY) { | 4884 | } else if (type->t & VT_ARRAY) { |
| 4881 | s = type->ref; | 4885 | s = type->ref; |
| 4882 | n = s->c; | 4886 | n = s->c; |