test: Support for non-Guix[SD]: cater for missing CC/CC32 compilers.

* make/check.make: Skip if CC is not set.
* make/check-mlibc.make: New file.
* scaffold/scaffold.make: Use it for mlibc targets.
* tinycc/tinycc.make: Skip mlibc targets if CC32 not set.

make/check-mlibc.make

@@ -0,0 +1,3 @@
+ifneq ($(CC32),)
+include make/check.make
+endif

make/check.make

@@ -1,3 +1,4 @@
+ifneq ($(CC),)
 ifeq ($(TEST),)
 TEST:=$(TARGET)-check
 $(TEST): EXPECT:=$(EXPECT)
@@ -13,4 +14,6 @@ endif
 CHECK+=$(TEST)
 $(TEST): TEST:=$(TEST)
 $(DIR)-check: $(TEST)
+endif
 include make/reset.make
+

scaffold/scaffold.make

@@ -42,7 +42,7 @@ include make/bin-mlibc.make
 
 TARGET:=m.mlibc
 EXPECT:=255
-include make/check.make
+include make/check-mlibc.make
 
 TARGET:=hello.mlibc
 C_FILES:=$(DIR)/hello.c
@@ -50,7 +50,7 @@ include make/bin-mlibc.make
 
 TARGET:=hello.mlibc
 EXPECT:=42
-include make/check.make
+include make/check-mlibc.make
 
 TARGET:=micro-mes.mlibc
 C_FILES:=$(DIR)/micro-mes.c
@@ -59,21 +59,21 @@ include make/bin-mlibc.make
 TEST:=micro-mes.mlibc-check
 $(TEST): $(OUT)/micro-mes.mlibc
 	$< 2 3; r=$$?; [ $$r = 3 ]
-include make/check.make
+include make/check-mlibc.make
 
 TARGET:=t.mlibc
 C_FILES:=$(DIR)/t.c
 include make/bin-mlibc.make
 
 TARGET:=t.mlibc
-include make/check.make
+include make/check-mlibc.make
 
 TARGET:=t-tcc.mlibc
 C_FILES:=$(DIR)/t-tcc.c
 include make/bin-mlibc.make
 
 TARGET:=t-tcc.mlibc
-include make/check.make
+include make/check-mlibc.make
 
 CROSS:=$(CC32:%gcc=%)
 #$(OUT)/$(DIR)/mini-mes.$(CROSS)o: $(SNARF.MES)

tinycc/tinycc.make

@@ -73,6 +73,7 @@ TINYCC_REST:=\
 #
 
 define tinycc-test
+ifneq ($(CC32),)
 EXT:=mlibc
 TARGET:=$(1).mlibc
 C_FILES:=$$(TINYCC_TEST2)/$(1).c
@@ -82,6 +83,7 @@ include make/bin-mlibc.make
 EXT:=mlibc
 TARGET:=$(1).mlibc
 include make/check-tinycc.make
+endif
 
 EXT:=guile
 TARGET:=$(1).guile