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Workaround Debian's broken System.map behavior #12862

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Dec 17, 2021
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Workaround Debian's broken System.map behavior #12862

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8 changes: 8 additions & 0 deletions module/Makefile.in
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Original file line number Diff line number Diff line change
Expand Up @@ -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
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