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With GCC plugins enabled, external module builds can record -fplugin=... paths in DWARF producer metadata via -grecord-gcc-switches, leaking host/build specific paths and triggering QA checks. Handle this in scripts/Makefile.gcc-plugins for KBUILD_EXTMOD builds by adding -gno-record-gcc-switches to plugin cflags. This keeps plugin behavior unchanged while avoiding absolute plugin path leakage in external module debug metadata. Suggested-by: Nathan Chancellor <nathan@kernel.org> Link: https://lore.kernel.org/all/20260817185146.GC1249844@ax162/ Signed-off-by: Jaihind Yadav <jaihindy@qti.qualcomm.com> Link: https://patch.msgid.link/20260820060116.786173-1-jaihindy@qti.qualcomm.com Signed-off-by: Nathan Chancellor <nathan@kernel.org>
34 lines
1.4 KiB
Makefile
34 lines
1.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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gcc-plugin-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) += latent_entropy_plugin.so
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gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) \
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+= -DLATENT_ENTROPY_PLUGIN
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ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY
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DISABLE_LATENT_ENTROPY_PLUGIN += -fplugin-arg-latent_entropy_plugin-disable -ULATENT_ENTROPY_PLUGIN
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endif
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export DISABLE_LATENT_ENTROPY_PLUGIN
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# Disable recording GCC options in debug info when building external modules to
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# avoid leaking absolute host build paths
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gcc-plugin-cflags-$(if $(KBUILD_EXTMOD),y) += -gno-record-gcc-switches
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# All the plugin CFLAGS are collected here in case a build target needs to
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# filter them out of the KBUILD_CFLAGS.
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GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y)) -DGCC_PLUGINS
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export GCC_PLUGINS_CFLAGS
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# Add the flags to the build!
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KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
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# Some plugins are enabled outside of this Makefile, but they still need to
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# be included in GCC_PLUGIN so they can get built.
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gcc-plugin-external-$(CONFIG_GCC_PLUGIN_RANDSTRUCT) \
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+= randomize_layout_plugin.so
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gcc-plugin-external-$(CONFIG_GCC_PLUGIN_STACKLEAK) \
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+= stackleak_plugin.so
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# All enabled GCC plugins are collected here for building in
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# scripts/gcc-scripts/Makefile.
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GCC_PLUGIN := $(gcc-plugin-y) $(gcc-plugin-external-y)
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export GCC_PLUGIN
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