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4f81c42fbd
Ensure that worlds/releases built from different source paths are
reproducible. Currently they are not since src and obj paths are
embedded in DWARF info. There are some uses of __FILE__ in the src tree
as well, and they are similarly handled by this change.
Use /usr/src and /usr/obj as the canonical src and obj paths when
WITH_REPRODUCIBLE_BUILD is defined. Define a DEBUG_PREFIX variable
which is used to ask the compiler to substitute paths in output files
using -ffile-prefix-map.
Compat builds (i.e., lib32) complicate things since they override
OBJROOT to point to obj-${compat} but still refer to headers from the
native objroot (e.g., llvm headers).
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D50951
68 lines
1.9 KiB
Makefile
68 lines
1.9 KiB
Makefile
#
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# This file configures debug options for compiled targets. It is meant
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# to consolidate common logic in bsd.prog.mk and bsd.lib.mk. It should
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# not be included directly by Makefiles.
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#
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.include <bsd.opts.mk>
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.if ${MK_ASSERT_DEBUG} == "no"
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CFLAGS+= -DNDEBUG
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# XXX: shouldn't we ensure that !asserts marks potentially unused variables as
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# __unused instead of disabling -Werror globally?
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MK_WERROR= no
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.endif
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# If reproducible build mode is enabled, map the root of the source
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# directory to /usr/src and the root of the object directory to
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# /usr/obj.
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.if ${MK_REPRODUCIBLE_BUILD} != "no" && !defined(DEBUG_PREFIX)
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.if defined(SRCTOP)
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DEBUG_PREFIX+= ${SRCTOP:S,/$,,}=/usr/src
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.endif
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.if defined(OBJROOT)
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# Strip off compat subdirectories, e.g., /usr/obj/usr/src/amd64.amd64/obj-lib32
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# becomes /usr/obj/usr/src/amd64.amd64, since object files compiled there might
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# refer to something outside the root.
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DEBUG_PREFIX+= ${OBJROOT:S,/$,,:C,/obj-[^/]*$,,}=/usr/obj
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.endif
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.endif
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.if defined(DEBUG_PREFIX)
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.for map in ${DEBUG_PREFIX}
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CFLAGS+= -ffile-prefix-map=${map}
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CXXFLAGS+= -ffile-prefix-map=${map}
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.endfor
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.endif
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.if defined(DEBUG_FLAGS)
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CFLAGS+=${DEBUG_FLAGS}
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CXXFLAGS+=${DEBUG_FLAGS}
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.if ${MK_CTF} != "no" && ${DEBUG_FLAGS:M-g} != ""
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CTFFLAGS+= -g
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.endif
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.else
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STRIP?= -s
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.endif
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.if ${MK_DEBUG_FILES} != "no" && empty(DEBUG_FLAGS:M-g) && \
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empty(DEBUG_FLAGS:M-gdwarf*)
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.if !${COMPILER_FEATURES:Mcompressed-debug}
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CFLAGS+= ${DEBUG_FILES_CFLAGS:N-gz*}
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CXXFLAGS+= ${DEBUG_FILES_CFLAGS:N-gz*}
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.else
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CFLAGS+= ${DEBUG_FILES_CFLAGS}
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CXXFLAGS+= ${DEBUG_FILES_CFLAGS}
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.endif
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CTFFLAGS+= -g
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.endif
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_debuginstall:
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.if ${MK_DEBUG_FILES} != "no" && defined(DEBUGFILE)
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.if defined(DEBUGMKDIR)
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${INSTALL} ${TAG_ARGS:D${TAG_ARGS},dbg} -d ${DESTDIR}${DEBUGFILEDIR}/
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.endif
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${INSTALL} ${TAG_ARGS:D${TAG_ARGS},dbg} -o ${DEBUGOWN} -g ${DEBUGGRP} -m ${DEBUGMODE} \
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${DEBUGFILE} ${DESTDIR}${DEBUGFILEDIR}/${DEBUGFILE}
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.endif
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