misc. fixes

- tccgen: error out for cast to void, as in
      void foo(void) { return 1; }
  This avoids an assertion failure in x86_64-gen.c, also.
  also fix tests2/03_struct.c accordingly

- Error: "memory full" - be more specific

- Makefiles: remove circular dependencies, lookup tcctest.c from VPATH

- tcc.h: cleanup lib, include, crt and libgcc search paths"
  avoid duplication or trailing slashes with no CONFIG_MULTIARCHDIR
  (as from 9382d6f1a0e2d0104a82ed805207d9e742c6b068)

- tcc.h: remove ";{B}" from PE search path
  in ce5e12c2f950052d8109b6b7a56d900547705c08 James Lyon wrote:
  "... I'm not sure this is the right way to fix this problem."
  And the answer is: No, please. (copying libtcc1.a for tests instead)

- win32/build_tcc.bat: do not move away a versioned file

1 files changed, 4 insertions, 4 deletions

diff --git a/tccgen.c b/tccgen.c
index 8355aae..f23cd07 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -309,7 +309,7 @@ static void vsetc(CType *type, int r, CValue *vc)
     int v;
 
     if (vtop >= vstack + (VSTACK_SIZE - 1))
-        tcc_error("memory full");
+        tcc_error("memory full (vstack)");
     /* cannot let cpu flags if other instruction are generated. Also
        avoid leaving VT_JMP anywhere except on the top of the stack
        because it would complicate the code generator. */
@@ -483,7 +483,7 @@ ST_FUNC void vswap(void)
 ST_FUNC void vpushv(SValue *v)
 {
     if (vtop >= vstack + (VSTACK_SIZE - 1))
-        tcc_error("memory full");
+        tcc_error("memory full (vstack)");
     vtop++;
     *vtop = *v;
 }
@@ -2348,8 +2348,8 @@ static void gen_assign_cast(CType *dt)
     st = &vtop->type; /* source type */
     dbt = dt->t & VT_BTYPE;
     sbt = st->t & VT_BTYPE;
-    if (sbt == VT_VOID)
-        tcc_error("Cannot assign void value");
+    if (sbt == VT_VOID || dbt == VT_VOID)
+        tcc_error("cannot cast from/to void");
     if (dt->t & VT_CONSTANT)
         tcc_warning("assignment of read-only location");
     switch(dbt) {