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[[!meta copyright="Copyright © 2011, 2012, 2013 Free Software Foundation,
Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled [[GNU Free Documentation
License|/fdl]]."]]"""]]
[[!tag open_issue_llvm]]
Here's what's to be done for maintaining [[/LLVM]].
Apart from the target-specific configuration machinery, there shouldn't be any
major differences within LLVM between the GNU/Hurd and GNU/Linux ports, for
example. Especially all the compiler magic is all the same.
[[!toc levels=2]]
# [[General information|/llvm]]
## Rebuild of the Debian archive with clang
From [[!message-id "20120305195308.GA1904@zouish.org"]]:
<http://sylvestre.ledru.info/blog/sylvestre/2012/02/29/rebuild_of_the_debian_archive_with_clang>,
<http://clang.debian.net/>.
# [[Sources|source_repositories/llvm]]
# Configuration
<!--
For all of llvm, clang, compiler-rt, test-suite:
git checkout reviewed
git log --reverse --topo-order --pretty=fuller --stat=$COLUMNS,$COLUMNS -w -p -C --cc ..upstream/master
-i
/^commit |^merge:|^---$|hurd|gnu|linux|nacl|nptl|glibc|[^e]gs:|/proc
-->
Last reviewed up to the [[Git mirror's sources|source_repositories/llvm]]: llvm
6f7becfe23f38e8c28e9422d883263974058aeed (2013-03-24), clang
495cfa46300979642acde8d93a1f21c9291dac98 (2013-03-23), compiler-rt
a06fe9183fbffb78798a444da9bc3040fdd444aa (2013-03-23), test-suite
5a05572d268568fb15b48f374f9fc9f882adecd2 (2013-03-23).
* <http://anonscm.debian.org/viewvc/pkg-llvm/llvm/trunk/debian/patches/>.
* [low] Some more `PATH_MAX`/`MAXPATHLEN` things.
* `gs:` usage
* `lib/Target/X86/`, `test/CodeGen/X86/`, `test/MC/X86/`.
* `tools/clang/`
tools/clang/docs/LanguageExtensions.rst: movl %gs:(%eax), %eax
tools/clang/test/Sema/asm.c: asm volatile ("movb %%gs:%P2,%b0" : "=q"(b) : "0"(0), "i"(5L));
* `compiler-rt` and `test-suite` not yet examined.
* [low] Linuxisms
* In some CMake files (`CMakeLists.txt`, for example).
* `test/`, `unittests`, `tools/clang/test/`, `tools/clang/unittests/` not
yet examined.
* In clang's `test/Driver/` a lot of testing can be generalized from
*Linux* to *GNU environment*, adding GNU/Hurd testing, too.
* LLVM commit 98fbe27ac8f0766ea94b89b8c03418131b72bea4 `Support for
HiPE-compatible code emission`
Only relevant for `CallingConv::HiPE`.
+ assert(ST->isTargetLinux() &&
+ "HiPE prologue is only supported on Linux operating systems.");
* `compiler-rt` and `test-suite` not yet examined.
* `/proc` usage
* `compiler-rt` and `test-suite` not yet examined.
* `libc++` (not currently using)
Some Hurd-porting work is said to have been done as Google Summer of Code
2012 Debian project,
<http://wiki.debian.org/SummerOfCode2012/StudentApplications/AndrejBelym>.
# Build
Here's a log of a LLVM build run; this is from our [[Git repository's
sources|source_repositories/llvm]], llvm
dc218fb6ae3241f4b66e9bf2c9d6352efecc0a14 (2013-03-24), clang
744290b5ecd48bddb4a6cf96d68cdc4a57e24e36 (2013-03-24), compiler-rt
a06fe9183fbffb78798a444da9bc3040fdd444aa (2013-03-23), test-suite
1821ab0ef1c73430705356fdfde3769460092382 (2013-03-24), run on
kepler.SCHWINGE and coulomb.SCHWINGE.
$ export LC_ALL=C
$ (cd ../Horace_Silver/ && ln -sfn ../../../clang/tschwinge/Hank_Mobley tools/clang)
$ (cd ../Horace_Silver/ && ln -sfn ../../../compiler-rt/tschwinge/Doug_Watkins projects/compiler-rt)
$ (cd ../Horace_Silver/ && ln -sfn ../../../test-suite/tschwinge/Art_Blakey projects/test-suite)
$ ../Horace_Silver/configure --prefix="$PWD".install --enable-optimized SHELL=/bin/dash CC=gcc-4.7 CXX=g++-4.7 2>&1 | tee log_build
$ make VERBOSE=1 2>&1 | tee log_build_
Different hosts may default to different shells and compiler versions; thus
harmonized.
Passing `--enable-debug-symbols`, the GNU/Hurd build on coulomb.SCHWINGE
terminates with a SIGBUS
when linking `Release+Debug+Asserts/bin/clang` (which is bigger than 500 MiB
for the corresponding GNU/Linux build). Using `--enable-debug-symbols
--enable-shared`, the GNU/Hurd build hang after `make[1]: Leaving directory
[...]/tools/llvm-shlib`, after (successfully) linking
`Release+Debug+Asserts/lib/libLLVM-3.3svn.so` (which is bigger than 250 MiB for
the corresponding GNU/Linux build). Also there is a separate
`--enable-debug-runtime`.
This takes up around 3.2 GiB, and needs roughly 1.5 h on kepler.SCHWINGE and
5.25 h on coulomb.SCHWINGE.
Configuring without `--enable-optimized` even crashes mighty darnassus,
probably because of too-big files when linking. Configuring with
`--enable-optimized --enable-expensive-checks --disable-threads
--enable-debug-symbols --enable-debug-runtime` is fine.
<!--
$ (make VERBOSE=1 && touch .go-install) 2>&1 | tee log_build_ && test -f .go-install && (make VERBOSE=1 install && touch .go-test) 2>&1 | tee log_install && test -f .go-test && { make -k VERBOSE=1 LIT_ARGS='-v --threads=1' check-all 2>&1 | tee log_test_check-all; make -k -C projects/test-suite/ 2>&1 | tee log_test_test-suite; }
$ (PATH=$HOME/tmp/source/autoconf/AUTOCONF-2.60.build.install/bin:$HOME/tmp/source/automake/automake-1.9.6.build.install/bin:$HOME/tmp/source/libtool/release-1-5-22.build.install/bin:$PATH; ./AutoRegen.sh)
-->
## Analysis
$ toolchain/logs/process llvm build
-checking for mmap of files... yes
+checking for mmap of files... no
checking if /dev/zero is needed for mmap... no
+configure: WARNING: mmap() of files required but not found
Due to [[mmap_write-only]].
+In file included from [...]/lib/Support/Process.cpp:85:0:
+[...]/lib/Support/Unix/Process.inc: In function 'unsigned int getColumns(int)':
+[...]/lib/Support/Unix/Process.inc:227:21: warning: enumeral and non-enumeral type in conditional expression [enabled by default]
225 // Try to determine the width of the terminal.
226 struct winsize ws;
227 if (ioctl(FileID, TIOCGWINSZ, &ws) == 0)
include/llvm/Config/*
Makefile.config
TODO
# Install
$ make VERBOSE=1 install 2>&1 | tee log_install
This takes up around 400 MiB, and needs roughly 1 min on kepler.SCHWINGE and 12
min on coulomb.SCHWINGE.
## Analysis
$ toolchain/logs/process llvm install
TODO
# Testsuite
$ make -k VERBOSE=1 LIT_ARGS='-v --threads=1' check-all 2>&1 | tee log_test_check-all
$ make -k -C projects/test-suite/ 2>&1 | tee log_test_test-suite
`LIT_ARGS=-v` is default for `VERBOSE=1`, but we want only one worker thread,
for stable order and usable test output log.
This needs roughly 10 min (`check-all`) + 150 min (test-suite) = 160 min on
kepler.SCHWINGE and 45 min (`check-all`) + 165 min (test-suite) = 210 min on
coulomb.SCHWINGE.
## Analysis
$ toolchain/logs/process llvm test
* `LLVM :: CodeGen/X86/mult-alt-generic-i686.ll`
This one, as well as a really large set of test from the test-suite fail on
coulomb.SCHWINGE no matter whether a GNU/Hurd or GNU/Linux system is booted
-- so all these are specific to the Athlon XP processor, hopefully.
* `Clang :: Index/crash-recovery-modules.m`
Also fails on GNU/Linux. Tested `--enable-optimized
--enable-expensive-checks --disable-threads --enable-debug-symbols
--enable-debug-runtime`. [[!LLVM_bug 11974]].
* `Clang :: Misc/dev-fd-fs.c`
$ cat < [...]/test/Misc/dev-fd-fs.c | Release+Debug+Asserts+Checks/bin/clang -x c /dev/fd/0 -E
clang: error: no such file or directory: '/dev/fd/0'
clang: error: no input files
Compare to:
$ cat < [...]/test/Misc/dev-fd-fs.c | gcc -x c /dev/fd/0 -E
gcc: error: /dev/fd/0: (ipc/mig) bad request message ID
gcc: warning: '-x c' after last input file has no effect
gcc: fatal error: no input files
compilation terminated.
These work:
$ Release+Debug+Asserts+Checks/bin/clang -x c /dev/fd/0 -E < [...]/test/Misc/dev-fd-fs.c
[...]
int x;
$ gcc -x c /dev/fd/0 -E < [...]/test/Misc/dev-fd-fs.c
[...]
int x;
#include <stdio.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
while (argc > 0)
{
int err;
char *f = argv[argc -1];
err = access(f, F_OK);
if (err < 0)
printf("%s: %m\n", f);
argc--;
}
return 0;
}
$ ./a.out /dev/fd/0 < /dev/null
$ cat < /dev/null | ./a.out /dev/fd/0
/dev/fd/0: (ipc/mig) bad request message ID
`file_check_access` fails with `MIG_BAD_ID`, meaning this RPC is not
implemented.
The difference is that the former directly refers to the `/dev/null`
instance, whereas the latter goes through an intermediate pflocal instance.
Similarly:
$ stat /dev/fd/0 < /dev/null
File: `/dev/fd/0'
Size: 0 Blocks: 0 IO Block: 1048576 character special file
Device: 17h/23d Inode: 342820 Links: 1 Device type: 0,0
Access: (0666/crw-rw-rw-) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2012-11-27 16:03:19.000000000 +0100
Modify: 2012-11-27 16:03:19.000000000 +0100
Change: 2012-11-27 16:03:19.000000000 +0100
Birth: -
$ cat < /dev/null | stat /dev/fd/0
File: `/dev/fd/0'
Size: 0 Blocks: 0 IO Block: 65536 fifo
Device: 9h/9d Inode: 0 Links: 0
Access: (0000/p---------) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 1970-01-01 01:00:00.000000000 +0100
Modify: 1970-01-01 01:00:00.000000000 +0100
Change: 1970-01-01 01:00:00.000000000 +0100
Birth: -
`io_stat_request` fills in these values.
* `Clang :: Tooling/clang-check-builtin-headers.cpp`
Fails: `fatal error: 'stddef.h' file not found`; succeeds when ran
manually.
* With `--enable-optimized --enable-expensive-checks --disable-threads
--enable-debug-symbols --enable-debug-runtime`, there are a few new FAILs
for both GNU/Linux and GNU/Hurd:
* `Clang :: Tooling/auto-detect-from-source-parent-of-cwd.cpp`
* `Clang :: Tooling/auto-detect-from-source-parent.cpp`
* `Clang :: Tooling/clang-check-autodetect-dir.cpp`
For all three, the `clang-check` invocation fails. [[!LLVM_bug 15194]].
* Several tests are not considered on GNU/Hurd.
-PASS: Clang-Unit :: ASTMatchers/[...]/tschwinge/Horace_Silver.build/tools/clang/unittests/ASTMatchers/Release+Asserts/ASTMatchersTests/HasNameDeathTest.DiesOnEmptyName
-PASS: Clang-Unit :: ASTMatchers/[...]/tschwinge/Horace_Silver.build/tools/clang/unittests/ASTMatchers/Release+Asserts/ASTMatchersTests/HasNameDeathTest.DiesOnEmptyPattern
-PASS: Clang-Unit :: ASTMatchers/[...]/tschwinge/Horace_Silver.build/tools/clang/unittests/ASTMatchers/Release+Asserts/ASTMatchersTests/IsDerivedFromDeathTest.DiesOnEmptyBaseName
-PASS: LLVM-Unit :: ADT/[...]/tschwinge/Horace_Silver.build/unittests/ADT/Release+Asserts/ADTTests/APFloatTest.SemanticsDeath
-PASS: LLVM-Unit :: ADT/[...]/tschwinge/Horace_Silver.build/unittests/ADT/Release+Asserts/ADTTests/APFloatTest.StringDecimalDeath
-PASS: LLVM-Unit :: ADT/[...]/tschwinge/Horace_Silver.build/unittests/ADT/Release+Asserts/ADTTests/APFloatTest.StringDecimalExponentDeath
-PASS: LLVM-Unit :: ADT/[...]/tschwinge/Horace_Silver.build/unittests/ADT/Release+Asserts/ADTTests/APFloatTest.StringDecimalSignificandDeath
-PASS: LLVM-Unit :: ADT/[...]/tschwinge/Horace_Silver.build/unittests/ADT/Release+Asserts/ADTTests/APFloatTest.StringHexadecimalDeath
-PASS: LLVM-Unit :: ADT/[...]/tschwinge/Horace_Silver.build/unittests/ADT/Release+Asserts/ADTTests/APFloatTest.StringHexadecimalExponentDeath
-PASS: LLVM-Unit :: ADT/[...]/tschwinge/Horace_Silver.build/unittests/ADT/Release+Asserts/ADTTests/APFloatTest.StringHexadecimalSignificandDeath
-PASS: LLVM-Unit :: ADT/[...]/tschwinge/Horace_Silver.build/unittests/ADT/Release+Asserts/ADTTests/APIntTest.StringDeath
-PASS: LLVM-Unit :: Support/[...]/tschwinge/Horace_Silver.build/unittests/Support/Release+Asserts/SupportTests/LeakDetector.Death1
-PASS: LLVM-Unit :: Support/[...]/tschwinge/Horace_Silver.build/unittests/Support/Release+Asserts/SupportTests/ValueHandle.AssertingVH_Asserts
GTEST_HAS_DEATH_TEST utils/unittest/googletest/include/gtest/internal/gtest-port.h
-PASS: LLVM-Unit :: ADT/[...]/tschwinge/Horace_Silver.build/unittests/ADT/Release+Asserts/ADTTests/PackedVectorTest.SignedValues
-PASS: LLVM-Unit :: ADT/[...]/tschwinge/Horace_Silver.build/unittests/ADT/Release+Asserts/ADTTests/PackedVectorTest.UnsignedValues
EXPECT_DEBUG_DEATH utils/unittest/googletest/include/gtest/gtest-death-test.h
* Differences in test-suite, that are not evidently floating-point issues,
GNU/Linux vs. GNU/Hurd on coulomb.SCHWINGE:
gcc-4.6 -I/media/erich/home/thomas/tmp/llvm/tschwinge/Horace_Silver.build/projects/test-suite/SingleSource/UnitTests -I/media/erich/home/thomas/tmp/llvm/test-suite/tschwinge/Art_Blakey/SingleSource/UnitTests -I/home/thomas/tmp/llvm/tschwinge/Horace_Silver.build/projects/test-suite/../../../Horace_Silver/projects/test-suite/include -I../../include -I/home/thomas/tmp/llvm/tschwinge/Horace_Silver.build/include -I/home/thomas/tmp/llvm/tschwinge/Horace_Silver/include -D_GNU_SOURCE -D__STDC_LIMIT_MACROS -DNDEBUG -O3 /media/erich/home/thomas/tmp/llvm/test-suite/tschwinge/Art_Blakey/SingleSource/UnitTests/2007-04-25-weak.c -lm -o Output/2007-04-25-weak.native -lstdc++
+/media/erich/home/thomas/tmp/llvm/test-suite/tschwinge/Art_Blakey/SingleSource/UnitTests/2007-04-25-weak.c:3:1: warning: 'weak_import' attribute directive ignored [-Wattributes]
+/tmp/ccWGwKvo.o: In function `main':
+2007-04-25-weak.c:(.text.startup+0x7): undefined reference to `test_weak'
+collect2: ld returned 1 exit status
+make[2]: [Output/2007-04-25-weak.native] Error 1 (ignored)
On GNU/Linux, the clamav tests are compiled with `-DC_LINUX`.
+/media/erich/home/thomas/tmp/llvm/test-suite/tschwinge/Art_Blakey/MultiSource/Applications/lambda-0.1.3/lambda.cc:63:12: error: use of undeclared identifier 'MAXPATHLEN'
+ char buf[MAXPATHLEN+1];
..., with follow-up failures.
`projects/test-suite/MultiSource/Applications/obsequi` is not at all
considered for GNU/Hurd.
+/media/erich/home/thomas/tmp/llvm/test-suite/tschwinge/Art_Blakey/MultiSource/Benchmarks/Olden/voronoi/newvor.c:178:25: warning: implicit declaration of function 'memalign' is invalid in C99 [-Wimplicit-function-declaration]
+ char* base = (char*)memalign(align_size, alloc_size);
+ ^
+1 warning generated.
+/media/erich/home/thomas/tmp/llvm/test-suite/tschwinge/Art_Blakey/MultiSource/Benchmarks/Prolangs-C/archie-client/get_vdir.c:213:20: error: use of undeclared identifier 'MAXPATHLEN'
+ char l_name[MAX_DIR_LINESIZE];
+ ^
+/media/erich/home/thomas/tmp/llvm/test-suite/tschwinge/Art_Blakey/MultiSource/Benchmarks/Prolangs-C/archie-client/pprot.h:39:37: note: expanded from macro 'MAX_DIR_LINESIZE'
+#define MAX_DIR_LINESIZE 160+MAXPATHLEN /* Max linesize in directory */
+ ^
..., and several more.
|
