rewrite i386 tests Makefile

1) compute path to i386 compiler from configure.  If it is found, run
the i386 tests.  I use macros so that this approach could be applied
for other arches as well.

2) provide an easily extensible way to add tests

Most tests fail, but at least "make test" does something meaningful.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

configure

@@ -92,6 +92,7 @@ libs_softmmu=""
 libs_tools=""
 audio_pt_int=""
 audio_win_int=""
+cc_i386=i386-pc-linux-gnu-gcc
 
 # parse CC options first
 for opt do
@@ -789,12 +790,14 @@ case "$cpu" in
     i386)
            QEMU_CFLAGS="-m32 $QEMU_CFLAGS"
            LDFLAGS="-m32 $LDFLAGS"
+           cc_i386='$(CC) -m32'
            helper_cflags="-fomit-frame-pointer"
            host_guest_base="yes"
            ;;
     x86_64)
            QEMU_CFLAGS="-m64 $QEMU_CFLAGS"
            LDFLAGS="-m64 $LDFLAGS"
+           cc_i386='$(CC) -m32'
            host_guest_base="yes"
            ;;
     arm*)
@@ -2640,6 +2643,7 @@ echo "INSTALL_DIR=$install -d -m0755 -p" >> $config_host_mak
 echo "INSTALL_DATA=$install -m0644 -p" >> $config_host_mak
 echo "INSTALL_PROG=$install -m0755 -p" >> $config_host_mak
 echo "CC=$cc" >> $config_host_mak
+echo "CC_I386=$cc_i386" >> $config_host_mak
 echo "HOST_CC=$host_cc" >> $config_host_mak
 if test "$sparse" = "yes" ; then
   echo "CC      := REAL_CC=\"\$(CC)\" cgcc"       >> $config_host_mak

rules.mak

@@ -42,6 +42,15 @@ cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
 VPATH_SUFFIXES = %.c %.h %.S %.m %.mak %.texi
 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
 
+# find-in-path
+# Usage: $(call find-in-path, prog)
+# Looks in the PATH if the argument contains no slash, else only considers one
+# specific directory.  Returns an # empty string if the program doesn't exist
+# there.
+find-in-path = $(if $(find-string /, $1), \
+        $(wildcard $1), \
+        $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
+
 # Generate timestamp files for .h include files
 
 %.h: %.h-timestamp

tests/Makefile

@@ -3,82 +3,118 @@
 
 $(call set-vpath, $(SRC_PATH)/tests)
 
+QEMU=../i386-linux-user/qemu-i386
+QEMU_X86_64=../x86_64-linux-user/qemu-x86_64
+CC_X86_64=$(CC_I386) -m64
+
 CFLAGS=-Wall -O2 -g -fno-strict-aliasing -I..
 #CFLAGS+=-msse2
 LDFLAGS=
 
-ifeq ($(ARCH),i386)
-TESTS=linux-test testthread sha1-i386 test-i386
+# TODO: automatically detect ARM and MIPS compilers, and run those too
+
+# runcom maps page 0, so it requires root privileges
+# also, pi_10.com runs indefinitely
+
+I386_TESTS=hello-i386 \
+	   linux-test \
+	   testthread \
+	   sha1-i386 \
+	   test-i386 \
+	   test-mmap \
+	   # runcom
+
+# native i386 compilers sometimes are not biarch.  assume cross-compilers are
+ifneq ($(ARCH),i386)
+I386_TESTS+=run-test-x86_64
 endif
-ifeq ($(ARCH),x86_64)
-TESTS=test-x86_64
+
+TESTS = test_path
+ifneq ($(call find-in-path, $(CC_I386)),)
+TESTS += $(I386_TESTS)
 endif
-TESTS+=sha1# test_path
-#TESTS+=test_path
-#TESTS+=runcom
 
-QEMU=../i386-linux-user/qemu-i386
+all: $(patsubst %,run-%,$(TESTS))
+
+# rules to run tests
+
+.PHONY: $(patsubst %,run-%,$(TESTS))
+
+run-%: %
+	-$(QEMU) ./$*
+
+run-hello-i386: hello-i386
+run-linux-test: linux-test
+run-testthread: testthread
+run-sha1-i386: sha1-i386
+
+run-test-i386: test-i386
+	./test-i386 > test-i386.ref
+	-$(QEMU) test-i386 > test-i386.out
+	@if diff -u test-i386.ref test-i386.out ; then echo "Auto Test OK"; fi
+
+run-test-x86_64: test-x86_64
+	./test-x86_64 > test-x86_64.ref
+	-$(QEMU_X86_64) test-x86_64 > test-x86_64.out
+	@if diff -u test-x86_64.ref test-x86_64.out ; then echo "Auto Test OK"; fi
+
+run-test-mmap: test-mmap
+	-$(QEMU) ./test-mmap
+	-$(QEMU) -p 8192 ./test-mmap 8192
+	-$(QEMU) -p 16384 ./test-mmap 16384
+	-$(QEMU) -p 32768 ./test-mmap 32768
+
+run-runcom: runcom
+	-$(QEMU) ./runcom $(SRC_PATH)/tests/pi_10.com
+
+run-test_path: test_path
+	./test_path
+
+# rules to compile tests
 
-all: $(TESTS)
+test_path: test_path.o
+test_path.o: test_path.c
 
 hello-i386: hello-i386.c
-	$(CC) -nostdlib $(CFLAGS) -static $(LDFLAGS) -o $@ $<
+	$(CC_I386) -nostdlib $(CFLAGS) -static $(LDFLAGS) -o $@ $<
 	strip $@
 
 testthread: testthread.c
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< -lpthread
-
-test_path: test_path.c
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $<
-	./$@ || { rm $@; exit 1; }
+	$(CC_I386) $(CFLAGS) $(LDFLAGS) -o $@ $< -lpthread
 
 # i386/x86_64 emulation test (test various opcodes) */
 test-i386: test-i386.c test-i386-code16.S test-i386-vm86.S \
            test-i386.h test-i386-shift.h test-i386-muldiv.h
-	$(CC) -m32 $(CFLAGS) $(LDFLAGS) -static -o $@ \
+	$(CC_I386) $(CFLAGS) $(LDFLAGS) -o $@ \
               $(<D)/test-i386.c $(<D)/test-i386-code16.S $(<D)/test-i386-vm86.S -lm
 
 test-x86_64: test-i386.c \
            test-i386.h test-i386-shift.h test-i386-muldiv.h
-	$(CC) -m64 $(CFLAGS) $(LDFLAGS) -static -o $@ $(<D)/test-i386.c -lm
-
-ifeq ($(ARCH),i386)
-test: test-i386
-	./test-i386 > test-i386.ref
-else
-test:
-endif
-	$(QEMU) test-i386 > test-i386.out
-	@if diff -u test-i386.ref test-i386.out ; then echo "Auto Test OK"; fi
-
-.PHONY: test-mmap
-test-mmap: test-mmap.c
-	$(CC) $(CFLAGS) -Wall -static -O2 $(LDFLAGS) -o $@ $<
-	-./test-mmap
-	-$(QEMU) ./test-mmap
-	-$(QEMU) -p 8192 ./test-mmap 8192
-	-$(QEMU) -p 16384 ./test-mmap 16384
-	-$(QEMU) -p 32768 ./test-mmap 32768
+	$(CC_X86_64) $(CFLAGS) $(LDFLAGS) -o $@ $(<D)/test-i386.c -lm
 
 # generic Linux and CPU test
 linux-test: linux-test.c
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< -lm
+	$(CC_I386) $(CFLAGS) $(LDFLAGS) -o $@ $< -lm
+
+# vm86 test
+runcom: runcom.c
+	$(CC_I386) $(CFLAGS) $(LDFLAGS) -o $@ $<
+
+test-mmap: test-mmap.c
+	$(CC_I386) -m32 $(CFLAGS) -Wall -O2 $(LDFLAGS) -o $@ $<
 
 # speed test
 sha1-i386: sha1.c
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $<
+	$(CC_I386) $(CFLAGS) $(LDFLAGS) -o $@ $<
 
 sha1: sha1.c
-	$(HOST_CC) $(CFLAGS) $(LDFLAGS) -o $@ $<
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $<
 
 speed: sha1 sha1-i386
 	time ./sha1
 	time $(QEMU) ./sha1-i386
 
-# vm86 test
-runcom: runcom.c
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $<
-
+# broken test
 # NOTE: -fomit-frame-pointer is currently needed : this is a bug in libqemu
 qruncom: qruncom.c ../ioport-user.c ../i386-user/libqemu.a
 	$(CC) $(CFLAGS) -fomit-frame-pointer $(LDFLAGS) -I../target-i386 -I.. -I../i386-user -I../fpu \