Workaround Debian's fake System.map behavior

Debian ships fake System.map files by default, leading to the invocation of depmod with them to flood you with errors about missing symbols. Let's notice and not do that. Reviewed-by: Ahelenia Ziemiańska <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Rich Ercolani <[email protected]> Closes openzfs#12862
tonyhutter · Feb 10, 2022 · 2e3b3e3 · 2e3b3e3
1 parent a35125e
commit 2e3b3e3
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/module/Makefile.in b/module/Makefile.in
@@ -90,7 +90,15 @@ modules_install-Linux:
 	if [ -n "$(DESTDIR)" ]; then \
 		find $$kmoddir -name 'modules.*' | xargs $(RM); \
 	fi
+	@# Debian ships tiny fake System.map files that are
+	@# syntactically valid but just say
+	@# "if you want system.map go install this package"
+	@# Naturally, depmod is less than amused by this.
+	@# So if we find it missing or with one of these present,
+	@# we check for the alternate path for the System.map
 	sysmap=$(INSTALL_MOD_PATH)/boot/System.map-@LINUX_VERSION@; \
+	{ [ -f "$$sysmap" ] && [ $$(wc -l < "$$sysmap") -ge 100 ]; } || \
+		sysmap=$(INSTALL_MOD_PATH)/usr/lib/debug/boot/System.map-@LINUX_VERSION@; \
 	if [ -f $$sysmap ]; then \
 		depmod -ae -F $$sysmap @LINUX_VERSION@; \
 	fi