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author | emaste <emaste@FreeBSD.org> | 2018-03-29 12:52:58 +0000 |
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committer | emaste <emaste@FreeBSD.org> | 2018-03-29 12:52:58 +0000 |
commit | 9eaf2e718a98d9b306221921223f72bcd2654d51 (patch) | |
tree | e8a45a8feee7e8c7123eb04c2315c8d5da630334 /Makefile.inc1 | |
parent | 8d44e96c549ac602b1bca95375e9c2acffeb5f1d (diff) | |
download | FreeBSD-src-9eaf2e718a98d9b306221921223f72bcd2654d51.zip FreeBSD-src-9eaf2e718a98d9b306221921223f72bcd2654d51.tar.gz |
MFC kernel build-id support
MFC r320244, r320245, r320246, r320247, r320248, r320249,
r320250 (bdrewery):
Add basic bsd.linker.mk auto included from bsd.compiler.mk.
This will provide LINKER_TYPE and LINKER_VERSION.
Support XLD for setting X_LINKER_TYPE and X_LINKER_VERSION.
This is similar to r300350 for bsd.compiler.mk.
Support cached linker values in environment.
This is similar to r289659 for bsd.compiler.mk.
LINKER_VERSION: Support external binutils.
The ports binutils stores the version in the 5th word so just look for
a version using a pattern instead.
Don't overwrite already-set LINKER_VERSION/LINKER_TYPE.
Provide proper values for X_LINKER_TYPE/VERSION when XLD == LD.
Pass along LINKER_* vars during installworld and show in test-system-compiler.
MFC r320258, r320272, r320275, r320502 (emaste):
change GNU ld LINKER_TYPE from binutils to bfd
GNU binutils includes two linkers: ld.bfd and ld.gold. For clarity use
LINKER_TYPE=bfd to refer to ld.bfd, the original binutils linker that
identifies itself as "GNU ld".
bsd.linker.mk: add band-aid for linker invocation failure
In some cases bsd.linker.mk reports an error like:
make[4]: ".../share/mk/bsd.linker.mk" line 56:
Unknown linker from LD=ld -m elf32ppc_fbsd:"
For now change this to a .warning, and then assume GNU ld 2.17.50.
At present the linker type detection is used only for enabling build-id,
and we can carry on without it when type detection fails.
Also, show errors from ${LD} --version to aid in failure diagnosis.
Successful invocations of ${LD} --version produce no output on stderr
so this will not create any spam in non-failing builds.
enable --build-id for the kernel link
A Build-ID is an identifier generated at link time to uniquely identify
ELF binaries. It allows efficient confirmation that an executable or
shared library and a corresponding standalone debuginfo file match.
(Otherwise, a checksum of the debuginfo file must be calculated when
opening it in a debugger.)
The FreeBSD base system includes GNU bfd ld 2.17.50 as the linker for
architectures other than arm64. Build-ID support was added to bfd ld
shortly after that version, so was not previously available to us.
We can now start making use of Build-ID as we migrate to using lld or
bfd ld from ports, conditionally enabled based on the LINKER_TYPE and
LINKER_VERSION make variables added in r320244 and subsequent commits.
Introduce LINKER_FEATURES to avoid duplicating version logic
MFC r327857 (bdrewery, submitted by Dan McGregor):
Cache LINKER_FEATURES to fix the wrong ones being used.
Sponsored by: Dell EMC Isilon
Sponsored by: The FreeBSD Foundation
Diffstat (limited to 'Makefile.inc1')
-rw-r--r-- | Makefile.inc1 | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/Makefile.inc1 b/Makefile.inc1 index 54bb91a..ee61d14 100644 --- a/Makefile.inc1 +++ b/Makefile.inc1 @@ -147,7 +147,8 @@ TEST_SYSTEM_COMPILER_VARS= \ WANT_COMPILER_TYPE WANT_COMPILER_VERSION WANT_COMPILER_VERSION_FILE \ WANT_COMPILER_FREEBSD_VERSION WANT_COMPILER_FREEBSD_VERSION_FILE \ CC COMPILER_TYPE COMPILER_FEATURES COMPILER_VERSION \ - COMPILER_FREEBSD_VERSION + COMPILER_FREEBSD_VERSION \ + LINKER_TYPE LINKER_FEATURES LINKER_VERSION test-system-compiler: .PHONY .for v in ${TEST_SYSTEM_COMPILER_VARS} ${_+_}@printf "%-35s= %s\n" "${v}" "${${v}}" @@ -179,7 +180,10 @@ CROSSENV+= COMPILER_VERSION=${X_COMPILER_VERSION} \ _COMPILER_METADATA_VARS= COMPILER_VERSION \ COMPILER_TYPE \ COMPILER_FEATURES \ - COMPILER_FREEBSD_VERSION + COMPILER_FREEBSD_VERSION \ + LINKER_VERSION \ + LINKER_FEATURES \ + LINKER_TYPE compiler-metadata.mk: .PHONY .META @: > ${.TARGET} @echo ".info Using cached compiler metadata from build at $$(hostname) on $$(date)" \ |