[xen staging] tools/libs: Add rule to generate headers.lst

[patchbot@xxxxxxx]

commit 0670834c50e2eedc6a281e084fb9c181817f26ce
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Thu Feb 11 06:29:31 2021 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Fri Feb 19 17:10:33 2021 +0000

    tools/libs: Add rule to generate headers.lst
    
    abi-dumper needs a list of the public header files for shared objects, and
    only accepts this in the form of a file.
    
    No functional change.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>
    Release-Acked-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>
---
 tools/libs/.gitignore | 1 +
 tools/libs/libs.mk    | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/libs/.gitignore b/tools/libs/.gitignore
new file mode 100644
index 0000000000..4a13126144
--- /dev/null
+++ b/tools/libs/.gitignore
@@ -0,0 +1 @@
+*/headers.lst
diff --git a/tools/libs/libs.mk b/tools/libs/libs.mk
index 0b3381755a..7970627ac8 100644
--- a/tools/libs/libs.mk
+++ b/tools/libs/libs.mk
@@ -76,6 +76,10 @@ endif
 
 headers.chk: $(AUTOINCS)
 
+headers.lst: FORCE
+       @{ set -e; $(foreach h,$(LIBHEADERS),echo $(h);) } > $@.tmp
+       @$(call move-if-changed,$@.tmp,$@)
+
 libxen$(LIBNAME).map:
        echo 'VERS_$(MAJOR).$(MINOR) { global: *; };' >$@
 
@@ -118,9 +122,12 @@ TAGS:
 clean:
        rm -rf *.rpm $(LIB) *~ $(DEPS_RM) $(LIB_OBJS) $(PIC_OBJS)
        rm -f lib$(LIB_FILE_NAME).so.$(MAJOR).$(MINOR) 
lib$(LIB_FILE_NAME).so.$(MAJOR)
-       rm -f headers.chk
+       rm -f headers.chk headers.lst
        rm -f $(PKG_CONFIG)
        rm -f _paths.h
 
 .PHONY: distclean
 distclean: clean
+
+.PHONY: FORCE
+FORCE:
--
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