output space after TOK_PPNUM which followed by '+' or '-'

* correct -E output for the case ++ + ++ concatenation
        do this only for expanded from macro string
        and only when tcc_state->output_type == TCC_OUTPUT_PREPROCESS

tests/pp/02.expect

@@ -1,5 +1,6 @@
 f(2 * (y+1)) + f(2 * (f(2 * (z[0])))) % f(2 * (0)) + t(1);
-f(2 * (2+(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
+f(2 * (2 +(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
+
 char c[2][6] = { "hello", "" };
 f(2 * (y+1)) + f(2 * (f(2 * (z[0])))) % f(2 * (0)) + t(1);
-f(2 * (2+(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
+f(2 * (2 +(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);

tests/pp/14.c

@@ -0,0 +1,11 @@
+extern int printf(const char *format, ...);
+#define P ++
+#define n(x) x
+
+int main(void)
+{
+    int a = 0, b = -1;
+    int i1 = a P+P b;
+    printf("i1 = %d\n", i1);
+    return n(0x1e)n(-1);
+}

tests/pp/14.expect

@@ -0,0 +1,8 @@
+extern int printf(const char *format, ...);
+int main(void)
+{
+    int a = 0, b = -1;
+    int i1 = a +++ ++ b;
+    printf("i1 = %d\n", i1);
+    return 0x1e -1;
+}

tests/pp/15.c

@@ -0,0 +1,21 @@
+#define Y(x) Z(x)
+#define X Y
+X(1)
+X(X(1))
+X(X(X(X(X(1)))))
+
+#define A B
+#define B A
+return A + B;
+
+#undef A
+#undef B
+
+#define A B+1
+#define B A
+return A + B;
+
+#define A1 B1+1
+#define B1 C1+2
+#define C1 A1+3
+return A1 + B1;

tests/pp/15.expect

@@ -0,0 +1,6 @@
+Z(1)
+Z(Z(1))
+Z(Z(Z(Z(Z(1)))))
+return A + B;
+return A+1 + B+1;
+return A1+3 +2 +1 + B1+1 +3 +2;

tests/pp/Makefile

@@ -6,17 +6,17 @@ TCC = ../../tcc
 TESTS = $(patsubst %.c,%.test,$(wildcard *.c))
 TESTS += $(patsubst %.S,%.test,$(wildcard *.S))
 
-all test : $(TESTS)
+all test : $(sort $(TESTS))
 
 %.test: %.c %.expect
 	@echo PPTest $* ...
-	@$(TCC) -E -P $< >$*.output 2>&1 ; \
+	-@$(TCC) -E -P $< >$*.output 2>&1 ; \
 	    diff -Nu -b -B -I "^#" $(EXTRA_DIFF_OPTS) $*.expect $*.output \
 	    && rm -f $*.output
 
 %.test: %.S %.expect
 	@echo PPTest $* ...
-	@$(TCC) -E -P $< >$*.output 2>&1 ; \
+	-@$(TCC) -E -P $< >$*.output 2>&1 ; \
 	    diff -Nu -b -B -I "^#" $(EXTRA_DIFF_OPTS) $*.expect $*.output \
 	    && rm -f $*.output