1 files changed, 66 insertions, 0 deletions
diff --git a/results/classifier/118/performance/1882497 b/results/classifier/118/performance/1882497
new file mode 100644
index 000000000..1b2e6dc50
--- /dev/null
+++ b/results/classifier/118/performance/1882497
@@ -0,0 +1,66 @@
+performance: 0.911
+ppc: 0.680
+graphic: 0.535
+files: 0.533
+device: 0.527
+vnc: 0.503
+PID: 0.503
+semantic: 0.469
+network: 0.461
+socket: 0.444
+register: 0.439
+architecture: 0.424
+risc-v: 0.416
+permissions: 0.411
+kernel: 0.384
+hypervisor: 0.383
+debug: 0.380
+peripherals: 0.365
+TCG: 0.342
+VMM: 0.315
+i386: 0.289
+boot: 0.281
+arm: 0.269
+virtual: 0.241
+KVM: 0.235
+user-level: 0.233
+x86: 0.196
+assembly: 0.186
+mistranslation: 0.167
+
+Missing 'cmp' utility makes build take 10 times as long
+
+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?
+
+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'; \
+
+
+Does this problem still persist with the latest version of QEMU (since we switched the build system mostly to meson now)?
+
+[Expired for QEMU because there has been no activity for 60 days.]
+