tools: Arrange to check public headers for ANSI compatiblity

Using the same rune as we use for the Xen public headers, except we do
not need stdint.h here.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

.gitignore

@@ -87,6 +87,8 @@ tools/config.cache
 config/Tools.mk
 config/Stubdom.mk
 config/Docs.mk
+tools/libs/toollog/headers.chk
+tools/libs/evtchn/headers.chk
 tools/blktap2/daemon/blktapctrl
 tools/blktap2/drivers/img2qcow
 tools/blktap2/drivers/lock-util

tools/Rules.mk

@@ -176,6 +176,14 @@ INSTALL_PYTHON_PROG = \
 %.opic: %.S
 	$(CC) $(CPPFLAGS) -DPIC $(CFLAGS) $(CFLAGS.opic) -fPIC -c -o $@ $< $(APPEND_CFLAGS)
 
+headers.chk:
+	for i in $(filter %.h,$^); do \
+	    $(CC) -x c -ansi -Wall -Werror $(CFLAGS_xeninclude) \
+	          -S -o /dev/null $$i || exit 1; \
+	    echo $$i; \
+	done >$@.new
+	mv $@.new $@
+
 subdirs-all subdirs-clean subdirs-install subdirs-distclean: .phony
 	@set -e; for subdir in $(SUBDIRS) $(SUBDIRS-y); do \
 		$(MAKE) subdir-$(patsubst subdirs-%,%,$@)-$$subdir; \

tools/libs/evtchn/Makefile

@@ -32,8 +32,9 @@ build:
 	$(MAKE) libs
 
 .PHONY: libs
-libs: $(LIB)
+libs: headers.chk $(LIB)
 
+headers.chk: $(wildcard include/*.h)
 
 libxenevtchn.a: $(LIB_OBJS)
 	$(AR) rc $@ $^
@@ -64,6 +65,7 @@ TAGS:
 clean:
 	rm -rf *.rpm $(LIB) *~ $(DEPS) $(LIB_OBJS) $(PIC_OBJS)
 	rm -f libxenevtchn.so.$(MAJOR).$(MINOR) libxenevtchn.so.$(MAJOR)
+	rm -f headers.chk
 
 .PHONY: distclean
 distclean: clean

tools/libs/toollog/Makefile

@@ -27,7 +27,9 @@ build:
 	$(MAKE) libs
 
 .PHONY: libs
-libs: $(LIB)
+libs: headers.chk $(LIB)
+
+headers.chk: $(wildcard include/*.h)
 
 libxentoollog.a: $(LIB_OBJS)
 	$(AR) rc $@ $^
@@ -58,6 +60,7 @@ TAGS:
 clean:
 	rm -rf *.rpm $(LIB) *~ $(DEPS) $(LIB_OBJS) $(PIC_OBJS)
 	rm -f libxentoollog.so.$(MAJOR).$(MINOR) libxentoollog.so.$(MAJOR)
+	rm -f headers.chk
 
 .PHONY: distclean
 distclean: clean