cmp is used in the makefiles.
And there is some kind of warning during build if it is missing:
/bin/sh: cmp: command not found
But perhaps it should abort the build in this case.
Something like that helps:
diff --git a/Makefile b/Makefile
index 40e4f7677bde..05e029bd99db 100644
--- a/Makefile
+++ b/Makefile
@@ -482,6 +482,7 @@ include $(SRC_PATH)/tests/Makefile.include
all: $(DOCS) $(if $(BUILD_DOCS),sphinxdocs) $(TOOLS) $(HELPERS-y) recurse-all
modules $(vhost-user-json-y)
qemu-version.h: FORCE
+ @type cmp
$(call quiet-command, \
(printf '#define QEMU_PKGVERSION "$(QEMU_PKGVERSION)"\n'; \
printf '#define QEMU_FULL_VERSION "$(FULL_VERSION)"\n'; \
--
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https://bugs.launchpad.net/bugs/1882497
Title:
Missing 'cmp' utility makes build take 10 times as long
Status in QEMU:
New
Bug description:
I have been doing some work cross compiling qemu for Windows using a
minimal Fedora container. Recently I started hitting some timeouts on
the CI service and noticed a build of all targets was going over 1
hour.
It seems like the 'cmp' utility from diffutils is used somewhere in
the process and if it's missing, either a configure or a make gets run
way too many times - I'll try to pull logs from the CI system at some
stage soon.
Could a warning or error be added if cmp is missing?
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