diff options
author | Dimitry Andric <dim@FreeBSD.org> | 2021-10-02 16:52:35 +0200 |
---|---|---|
committer | Dimitry Andric <dim@FreeBSD.org> | 2021-10-03 12:13:35 +0200 |
commit | 9ce64e91907aaa43fc43a7b2faaae5bf99faaa56 (patch) | |
tree | 27c8798006f3b909ed4b1ccecebc9333d9345664 /lang/erlang/Makefile | |
parent | lang/intel-compute-runtime: drop i386 support (diff) |
lang/(erlang(-runtime2[13])?): work around dtrace failures with clang 13
During an exp-run for llvm 13 (see bug 258209), it turned out that
lang/erlang and lang/erlang-runtime2[13] fail to build with clang 13.
What appears to happen is that for these versions of erlang, PGO is
enabled, and it first builds a PGO-enabled beam.smp:
gmake[5]: Entering directory '/wrkdirs/usr/ports/lang/erlang/work/otp-OTP-21.3.8.24/erts/emulator'
if utils/gen_git_version amd64-portbld-freebsd14.0/gen_git_version.mk; then touch beam/erl_bif_info.c; fi
echo " PROFILE beam.prof.smp"
PROFILE beam.prof.smp
rm -f obj/amd64-portbld-freebsd14.0/opt/smp/erl*.profraw
set -e; LLVM_PROFILE_FILE="obj/amd64-portbld-freebsd14.0/opt/smp/erlc-%m.profraw" \
ERL_FLAGS="-emu_type prof +S 1" erlc -W -DPGO \
-o obj/amd64-portbld-freebsd14.0/opt/smp test/estone_SUITE.erl > obj/amd64-portbld-freebsd14.0/opt/smp/PROFILE_LOG
after which it does a test run, and uses llvm-profdata to merge the
profiling data into beam_emu_pu.o:
llvm-profdata merge -output obj/amd64-portbld-freebsd14.0/opt/smp/default.profdata obj/amd64-portbld-freebsd14.0/opt/smp/*.profraw
cc -fprofile-instr-use=obj/amd64-portbld-freebsd14.0/opt/smp/default.profdata -Werror=undef -Werror=implicit -Werror=return-type -O3 -fomit-frame-pointer -pipe -fno-omit-frame-pointer -DMAP_NORESERVE=0 -fstack-protector-strong -fno-strict-aliasing -I/wrkdirs/usr/ports/lang/erlang/work/otp-OTP-21.3.8.24/erts/amd64-portbld-freebsd14.0 -DHAVE_CONFIG_H -Wall -Wstrict-prototypes -Wmissing-prototypes -Wdeclaration-after-statement -DUSE_THREADS -D_THREAD_SAFE -D_REENTRANT -DPOSIX_THREADS -Iamd64-portbld-freebsd14.0/opt/smp -Ibeam -Isys/unix -Isys/common -Iamd64-portbld-freebsd14.0 -Ipcre -Ihipe -I../include -I../include/amd64-portbld-freebsd14.0 -I../include/internal -I../include/internal/amd64-portbld-freebsd14.0 -c beam/beam_emu.c -o obj/amd64-portbld-freebsd14.0/opt/smp/beam_emu_pu.o
Later, it runs dtrace over all the collected objects, and this dies:
dtrace -G -C -Ibeam \
-s beam/erlang_dtrace.d \
-o obj/amd64-portbld-freebsd14.0/opt/smp/erlang_pu_dtrace.o
... long list of objects ...
dtrace: failed to link script beam/erlang_dtrace.d: an error was encountered while processing obj/amd64-portbld-freebsd14.0/opt/smp/beam_emu_pu.o
gmake[5]: *** [amd64-portbld-freebsd14.0/Makefile:1005: obj/amd64-portbld-freebsd14.0/opt/smp/erlang_pu_dtrace.o] Error 1
gmake[5]: Leaving directory '/wrkdirs/usr/ports/lang/erlang/work/otp-OTP-21.3.8.24/erts/emulator'
Something in beam_emu_pu.o (emitted by clang or llvm 13) is tripping up
dtrace, but I have very little knowledge about dtrace so I need help
here. :)
Now some other erlang runtimes such as lang/erlang-runtime24 *do* build
successfully with clang 13, but this is only because upstream disabled
the PGO feature, as a side effect of
https://github.com/erlang/otp/commit/b165524c732 ("erts: Implement the
BeamAsm JIT"):
--- a/erts/configure.in
+++ b/erts/configure.in
...
@@ -704,6 +719,9 @@ else
fi
fi
+dnl Disable pgo for now
+USE_PGO=false
+
AC_SUBST(USE_PGO)
AC_SUBST(PROFILE_COMPILER)
I am unsure why upstream disabled this "for now", as it has been
disabled for more than a year. So, for now, work around the dtrace
failures by disabling PGO using the configure flag --disable-pgo, when
building with clang >= 13.
PR: 258494
Approved by: maintainer timeout (2 weeks)
MFH: 2021Q4
Diffstat (limited to 'lang/erlang/Makefile')
-rw-r--r-- | lang/erlang/Makefile | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lang/erlang/Makefile b/lang/erlang/Makefile index 867c69b8c4c0..baa0bf975b30 100644 --- a/lang/erlang/Makefile +++ b/lang/erlang/Makefile @@ -15,7 +15,7 @@ LICENSE= APACHE20 BROKEN_sparc64= Fails to build: error: fp_except undeclared -USES= cpe gmake ncurses perl5 +USES= compiler cpe gmake ncurses perl5 CPE_VENDOR= erlang CPE_PRODUCT= erlang/otp USE_GITHUB= nodefault @@ -106,6 +106,11 @@ WX_VARS= USE_GL="gl glu" \ .include <bsd.port.pre.mk> +.if ${COMPILER_TYPE} == clang && ${COMPILER_VERSION} >= 130 +# PR 258494 +CONFIGURE_ARGS+= --disable-pgo +.endif + .if ${OPSYS} == FreeBSD CFLAGS+= -DMAP_NORESERVE=0 .endif |