[XEN PATCH v3 17/25] libs/libs.mk: Rework target headers.chk dependencies

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

There is no need to call the "headers.chk" target when it isn't
wanted, so it never need to be .PHONY.

Also, there is no more reason to separate the prerequisites from the
recipe.

Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 tools/libs/libs.mk | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/tools/libs/libs.mk b/tools/libs/libs.mk
index 7aee449370..f778a7df82 100644
--- a/tools/libs/libs.mk
+++ b/tools/libs/libs.mk
@@ -55,22 +55,20 @@ $(PKG_CONFIG_LOCAL): PKG_CONFIG_INCDIR = $(XEN_INCLUDE)
 $(PKG_CONFIG_LOCAL): PKG_CONFIG_LIBDIR = $(CURDIR)
 
 .PHONY: all
-all: headers.chk $(TARGETS) $(PKG_CONFIG_LOCAL) libxen$(LIBNAME).map 
$(LIBHEADERS)
+all: $(TARGETS) $(PKG_CONFIG_LOCAL) libxen$(LIBNAME).map $(LIBHEADERS)
 
 ifneq ($(NO_HEADERS_CHK),y)
-headers.chk:
+all: headers.chk
+
+headers.chk: $(LIBHEADERS) $(AUTOINCS)
        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 $@
-else
-.PHONY: headers.chk
 endif
 
-headers.chk: $(LIBHEADERS) $(AUTOINCS)
-
 headers.lst: FORCE
        @{ set -e; $(foreach h,$(LIBHEADERS),echo $(h);) } > $@.tmp
        @$(call move-if-changed,$@.tmp,$@)
-- 
Anthony PERARD