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bin/ldc2 crashes when built using dmd
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I'm building LDC (v1.34.0 git tag) with LLVM (llvmorg-15.0.7 git tag) and DMD (dmd-2.105.2-0.fedora.x86_64.rpm).
Resulting compiler crashes when attempting to build runtime libraries during build:
[129/181] Building CXX object CMakeFiles/LDCShared.dir/gen/abi/aarch64.cpp.o
[130/181] Building CXX object CMakeFiles/LDCShared.dir/gen/aa.cpp.o
[131/181] Linking CXX static library lib/libldc.a
[132/181] Linking CXX executable bin/ldc2
[133/181] Generating objects-debug/etc/c/curl.o, objects-debug/etc/c/odbc/sql.o, objects-debug/etc/c/odbc/sqlext.o, objects-debug/etc/c/odbc/sqltypes.o, objects-debug/etc/c/odbc/sqlucode.o, objects-debug/etc/c/sqlite3.o, objects-debug/etc/c/zlib.o, objects-debug/std/algorithm/comparison.o, objects-debug/std/algorithm/internal.o, objects-debug/std/algorithm/iteration.o, objects-debug/std/algorithm/mutation.o, objects-debug/std/algorithm/package.o, objects-debug/std/algorithm/searching.o, objects-debug/std/algorithm/setops.o, objects-debug/std/algorithm/sorting.o, objects-debug/std/array.o, objects-debug/std/ascii.o, objects-debug/std/base64.o, objects-debug/std/bigint.o, objects-debug/std/bitmanip.o, objects-debug/std/checkedint.o, objects-debug/std/compiler.o, objects-debug/std/complex.o, objects-debug/std/concurrency.o, objects-debug/std/container/array.o, objects-debug/std/container/binaryheap.o, objects-debug/std/container/dlist.o, objects-debug/std/container/package.o, objects-debug/std/container/rbtree.o, objects-debug/std/container/slist.o, objects-debug/std/container/util.o, objects-debug/std/conv.o, objects-debug/std/csv.o, objects-debug/std/datetime/date.o, objects-debug/std/datetime/interval.o, objects-debug/std/datetime/package.o, objects-debug/std/datetime/stopwatch.o, objects-debug/std/datetime/systime.o, objects-debug/std/datetime/timezone.o, objects-debug/std/demangle.o, objects-debug/std/digest/crc.o, objects-debug/std/digest/hmac.o, objects-debug/std/digest/md.o, objects-debug/std/digest/murmurhash.o, objects-debug/std/digest/package.o, objects-debug/std/digest/ripemd.o, objects-debug/std/digest/sha.o, objects-debug/std/encoding.o, objects-debug/std/exception.o, objects-debug/std/experimental/allocator/building_blocks/affix_allocator.o, objects-debug/std/experimental/allocator/building_blocks/aligned_block_list.o, objects-debug/std/experimental/allocator/building_blocks/allocator_list.o, objects-debug/std/experimental/allocator/building_blocks/ascending_page_allocator.o, objects-debug/std/experimental/allocator/building_blocks/bitmapped_block.o, objects-debug/std/experimental/allocator/building_blocks/bucketizer.o, objects-debug/std/experimental/allocator/building_blocks/fallback_allocator.o, objects-debug/std/experimental/allocator/building_blocks/free_list.o, objects-debug/std/experimental/allocator/building_blocks/free_tree.o, objects-debug/std/experimental/allocator/building_blocks/kernighan_ritchie.o, objects-debug/std/experimental/allocator/building_blocks/null_allocator.o, objects-debug/std/experimental/allocator/building_blocks/package.o, objects-debug/std/experimental/allocator/building_blocks/quantizer.o, objects-debug/std/experimental/allocator/building_blocks/region.o, objects-debug/std/experimental/allocator/building_blocks/scoped_allocator.o, objects-debug/std/experimental/allocator/building_blocks/segregator.o, objects-debug/std/experimental/allocator/building_blocks/stats_collector.o, objects-debug/std/experimental/allocator/common.o, objects-debug/std/experimental/allocator/gc_allocator.o, objects-debug/std/experimental/allocator/mallocator.o, objects-debug/std/experimental/allocator/mmap_allocator.o, objects-debug/std/experimental/allocator/package.o, objects-debug/std/experimental/allocator/showcase.o, objects-debug/std/experimental/allocator/typed.o, objects-debug/std/experimental/checkedint.o, objects-debug/std/experimental/logger/core.o, objects-debug/std/experimental/logger/filelogger.o, objects-debug/std/experimental/logger/multilogger.o, objects-debug/std/experimental/logger/nulllogger.o, objects-debug/std/experimental/logger/package.o, objects-debug/std/file.o, objects-debug/std/format/internal/floats.o, objects-debug/std/format/internal/read.o, objects-debug/std/format/internal/write.o, objects-debug/std/format/package.o, objects-debug/std/format/read.o, objects-debug/std/format/spec.o, objects-debug/std/format/write.o, objects-debug/std/functional.o, objects-debug/std/getopt.o, objects-debug/std/int128.o, objects-debug/std/internal/attributes.o, objects-debug/std/internal/cstring.o, objects-debug/std/internal/digest/sha_SSSE3.o, objects-debug/std/internal/math/biguintarm.o, objects-debug/std/internal/math/biguintcore.o, objects-debug/std/internal/math/biguintnoasm.o, objects-debug/std/internal/math/biguintx86.o, objects-debug/std/internal/math/errorfunction.o, objects-debug/std/internal/math/gammafunction.o, objects-debug/std/internal/memory.o, objects-debug/std/internal/scopebuffer.o, objects-debug/std/internal/test/dummyrange.o, objects-debug/std/internal/test/range.o, objects-debug/std/internal/test/uda.o, objects-debug/std/internal/unicode_comp.o, objects-debug/std/internal/unicode_decomp.o, objects-debug/std/internal/unicode_grapheme.o, objects-debug/std/internal/unicode_norm.o, objects-debug/std/internal/unicode_tables.o, objects-debug/std/internal/windows/advapi32.o, objects-debug/std/json.o, objects-debug/std/logger/core.o, objects-debug/std/logger/filelogger.o, objects-debug/std/logger/multilogger.o, objects-debug/std/logger/nulllogger.o, objects-debug/std/logger/package.o, objects-debug/std/math/algebraic.o, objects-debug/std/math/constants.o, objects-debug/std/math/exponential.o, objects-debug/std/math/hardware.o, objects-debug/std/math/operations.o, objects-debug/std/math/package.o, objects-debug/std/math/remainder.o, objects-debug/std/math/rounding.o, objects-debug/std/math/traits.o, objects-debug/std/math/trigonometry.o, objects-debug/std/mathspecial.o, objects-debug/std/meta.o, objects-debug/std/mmfile.o, objects-debug/std/net/curl.o, objects-debug/std/net/isemail.o, objects-debug/std/numeric.o, objects-debug/std/outbuffer.o, objects-debug/std/package.o, objects-debug/std/parallelism.o, objects-debug/std/path.o, objects-debug/std/process.o, objects-debug/std/random.o, objects-debug/std/range/interfaces.o, objects-debug/std/range/package.o, objects-debug/std/range/primitives.o, objects-debug/std/regex/internal/backtracking.o, objects-debug/std/regex/internal/generator.o, objects-debug/std/regex/internal/ir.o, objects-debug/std/regex/internal/kickstart.o, objects-debug/std/regex/internal/parser.o, objects-debug/std/regex/internal/tests.o, objects-debug/std/regex/internal/tests2.o, objects-debug/std/regex/internal/thompson.o, objects-debug/std/regex/package.o, objects-debug/std/signals.o, objects-debug/std/socket.o, objects-debug/std/stdint.o, objects-debug/std/stdio.o, objects-debug/std/string.o, objects-debug/std/sumtype.o, objects-debug/std/system.o, objects-debug/std/traits.o, objects-debug/std/typecons.o, objects-debug/std/typetuple.o, objects-debug/std/uni/package.o, objects-debug/std/uri.o, objects-debug/std/utf.o, objects-debug/std/uuid.o, objects-debug/std/variant.o, objects-debug/std/zip.o, objects-debug/std/zlib.o
ninja: job terminated due to signal 11: cd /home/smoku/devel/Dos/dos/external/ldc/runtime/phobos && /home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2 -c --output-o -conf= -w -de -preview=dip1000 -preview=dtorfields -preview=fieldwise -g -link-defaultlib-debug -d-debug -I/home/smoku/devel/Dos/dos/external/ldc/runtime/druntime/src -I/home/smoku/devel/Dos/dos/external/ldc/runtime/phobos -od=/home/smoku/devel/Dos/dos/out/build/_host/ldc/runtime/objects-debug -op etc/c/curl.d etc/c/odbc/sql.d etc/c/odbc/sqlext.d etc/c/odbc/sqltypes.d etc/c/odbc/sqlucode.d etc/c/sqlite3.d etc/c/zlib.d std/algorithm/comparison.d std/algorithm/internal.d std/algorithm/iteration.d std/algorithm/mutation.d std/algorithm/package.d std/algorithm/searching.d std/algorithm/setops.d std/algorithm/sorting.d std/array.d std/ascii.d std/base64.d std/bigint.d std/bitmanip.d std/checkedint.d std/compiler.d std/complex.d std/concurrency.d std/container/array.d std/container/binaryheap.d std/container/dlist.d std/container/package.d std/container/rbtree.d std/container/slist.d std/container/util.d std/conv.d std/csv.d std/datetime/date.d std/datetime/interval.d std/datetime/package.d std/datetime/stopwatch.d std/datetime/systime.d std/datetime/timezone.d std/demangle.d std/digest/crc.d std/digest/hmac.d std/digest/md.d std/digest/murmurhash.d std/digest/package.d std/digest/ripemd.d std/digest/sha.d std/encoding.d std/exception.d std/experimental/allocator/building_blocks/affix_allocator.d std/experimental/allocator/building_blocks/aligned_block_list.d std/experimental/allocator/building_blocks/allocator_list.d std/experimental/allocator/building_blocks/ascending_page_allocator.d std/experimental/allocator/building_blocks/bitmapped_block.d std/experimental/allocator/building_blocks/bucketizer.d std/experimental/allocator/building_blocks/fallback_allocator.d std/experimental/allocator/building_blocks/free_list.d std/experimental/allocator/building_blocks/free_tree.d std/experimental/allocator/building_blocks/kernighan_ritchie.d std/experimental/allocator/building_blocks/null_allocator.d std/experimental/allocator/building_blocks/package.d std/experimental/allocator/building_blocks/quantizer.d std/experimental/allocator/building_blocks/region.d std/experimental/allocator/building_blocks/scoped_allocator.d std/experimental/allocator/building_blocks/segregator.d std/experimental/allocator/building_blocks/stats_collector.d std/experimental/allocator/common.d std/experimental/allocator/gc_allocator.d std/experimental/allocator/mallocator.d std/experimental/allocator/mmap_allocator.d std/experimental/allocator/package.d std/experimental/allocator/showcase.d std/experimental/allocator/typed.d std/experimental/checkedint.d std/experimental/logger/core.d std/experimental/logger/filelogger.d std/experimental/logger/multilogger.d std/experimental/logger/nulllogger.d std/experimental/logger/package.d std/file.d std/format/internal/floats.d std/format/internal/read.d std/format/internal/write.d std/format/package.d std/format/read.d std/format/spec.d std/format/write.d std/functional.d std/getopt.d std/int128.d std/internal/attributes.d std/internal/cstring.d std/internal/digest/sha_SSSE3.d std/internal/math/biguintarm.d std/internal/math/biguintcore.d std/internal/math/biguintnoasm.d std/internal/math/biguintx86.d std/internal/math/errorfunction.d std/internal/math/gammafunction.d std/internal/memory.d std/internal/scopebuffer.d std/internal/test/dummyrange.d std/internal/test/range.d std/internal/test/uda.d std/internal/unicode_comp.d std/internal/unicode_decomp.d std/internal/unicode_grapheme.d std/internal/unicode_norm.d std/internal/unicode_tables.d std/internal/windows/advapi32.d std/json.d std/logger/core.d std/logger/filelogger.d std/logger/multilogger.d std/logger/nulllogger.d std/logger/package.d std/math/algebraic.d std/math/constants.d std/math/exponential.d std/math/hardware.d std/math/operations.d std/math/package.d std/math/remainder.d std/math/rounding.d std/math/traits.d std/math/trigonometry.d std/mathspecial.d std/meta.d std/mmfile.d std/net/curl.d std/net/isemail.d std/numeric.d std/outbuffer.d std/package.d std/parallelism.d std/path.d std/process.d std/random.d std/range/interfaces.d std/range/package.d std/range/primitives.d std/regex/internal/backtracking.d std/regex/internal/generator.d std/regex/internal/ir.d std/regex/internal/kickstart.d std/regex/internal/parser.d std/regex/internal/tests.d std/regex/internal/tests2.d std/regex/internal/thompson.d std/regex/package.d std/signals.d std/socket.d std/stdint.d std/stdio.d std/string.d std/sumtype.d std/system.d std/traits.d std/typecons.d std/typetuple.d std/uni/package.d std/uri.d std/utf.d std/uuid.d std/variant.d std/zip.d std/zlib.d
#0 0x000055c1525e06d4 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x31006d4)
#1 0x000055c1525de61c llvm::sys::RunSignalHandlers() (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x30fe61c)
#2 0x000055c1525e0a38 SignalHandler(int) Signals.cpp:0:0
#3 0x00007f47e525fbb0 __restore_rt (/lib64/libc.so.6+0x3dbb0)
#4 0x000055c150262c6a Target::_init(Param const&) (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0xd82c6a)
#5 0x000055c1500dc177 mars_mainBody(Param&, Array<char const*>&, Array<char const*>&) (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0xbfc177)
#6 0x000055c1502bbbc5 cppmain() (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0xddbbc5)
#7 0x000055c1501f8be1 D main (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0xd18be1)
#8 0x000055c15261108f _D2rt6dmain212_d_run_main2UAAamPUQgZiZ6runAllMFZ9__lambda2MFZv (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x313108f)
#9 0x000055c152610f3e _D2rt6dmain212_d_run_main2UAAamPUQgZiZ7tryExecMFMDFZvZv (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x3130f3e)
#10 0x000055c152611017 _D2rt6dmain212_d_run_main2UAAamPUQgZiZ6runAllMFZv (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x3131017)
#11 0x000055c152610f3e _D2rt6dmain212_d_run_main2UAAamPUQgZiZ7tryExecMFMDFZvZv (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x3130f3e)
#12 0x000055c152610ea7 _d_run_main2 (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x3130ea7)
#13 0x000055c152610c90 _d_run_main (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x3130c90)
#14 0x000055c1502b9d94 main (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0xdd9d94)
#15 0x00007f47e5249b8a __libc_start_call_main /usr/src/debug/glibc-2.37-5.fc38.x86_64/csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#16 0x00007f47e5249c4b /usr/src/debug/glibc-2.37-5.fc38.x86_64/csu/../csu/libc-start.c:128:20
#17 0x00007f47e5249c4b __libc_start_main@GLIBC_2.2.5 /usr/src/debug/glibc-2.37-5.fc38.x86_64/csu/../csu/libc-start.c:347:5
#18 0x000055c14fe8ff45 _start (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x9aff45)
ninja: subcommand failed
make: *** [Makefile:88: /home/smoku/devel/Dos/dos/out/host/bin/ldc] Error 1
Built compiler crashes even on attempting to compile an empty file:
> /home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2 --version
LDC - the LLVM D compiler (1.34.0):
based on DMD v2.104.2 and LLVM 15.0.7
built with DMD64 D Compiler v2.105.2
Default target: x86_64-unknown-linux-gnu
Host CPU: znver3
> touch ~/test.d
> /home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2 ~/test.d
#0 0x000055714483e6d4 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x31006d4)
#1 0x000055714483c61c llvm::sys::RunSignalHandlers() (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x30fe61c)
#2 0x000055714483ea38 SignalHandler(int) Signals.cpp:0:0
#3 0x00007f294d05fbb0 __restore_rt (/lib64/libc.so.6+0x3dbb0)
#4 0x00005571424c0c6a Target::_init(Param const&) (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0xd82c6a)
#5 0x000055714233a177 mars_mainBody(Param&, Array<char const*>&, Array<char const*>&) (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0xbfc177)
#6 0x0000557142519bc5 cppmain() (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0xddbbc5)
#7 0x0000557142456be1 D main (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0xd18be1)
#8 0x000055714486f08f _D2rt6dmain212_d_run_main2UAAamPUQgZiZ6runAllMFZ9__lambda2MFZv (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x313108f)
#9 0x000055714486ef3e _D2rt6dmain212_d_run_main2UAAamPUQgZiZ7tryExecMFMDFZvZv (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x3130f3e)
#10 0x000055714486f017 _D2rt6dmain212_d_run_main2UAAamPUQgZiZ6runAllMFZv (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x3131017)
#11 0x000055714486ef3e _D2rt6dmain212_d_run_main2UAAamPUQgZiZ7tryExecMFMDFZvZv (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x3130f3e)
#12 0x000055714486eea7 _d_run_main2 (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x3130ea7)
#13 0x000055714486ec90 _d_run_main (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x3130c90)
#14 0x0000557142517d94 main (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0xdd9d94)
#15 0x00007f294d049b8a __libc_start_call_main /usr/src/debug/glibc-2.37-5.fc38.x86_64/csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#16 0x00007f294d049c4b /usr/src/debug/glibc-2.37-5.fc38.x86_64/csu/../csu/libc-start.c:128:20
#17 0x00007f294d049c4b __libc_start_main@GLIBC_2.2.5 /usr/src/debug/glibc-2.37-5.fc38.x86_64/csu/../csu/libc-start.c:347:5
#18 0x00005571420edf45 _start (/home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2+0x9aff45)
fish: Job 1, '/home/smoku/devel/Dos/dos/out/b…' terminated by signal SIGSEGV (Address boundary error)
I tried to debug using gdb. The backtrace pointed to Target::_init in gen/target.cpp, but the line was inconclusive.
So I sprinkled the whole function with printf() every second line to get the exact place of the crash and the problem disappeared. Compiler started working fine.
I was able to narrow it down to single printf line.
diff --git a/gen/target.cpp b/gen/target.cpp
index 8b81afe12e..00783089cb 100644
--- a/gen/target.cpp
+++ b/gen/target.cpp
@@ -177,6 +177,7 @@ void Target::_init(const Param ¶ms) {
RealProperties.min_normal = CTFloat::parse("0x1p-16382", isOutOfRange);
RealProperties.epsilon = CTFloat::parse("0x1p-63", isOutOfRange);
RealProperties.dig = 18;
+ printf(" ");
RealProperties.mant_dig = 64;
RealProperties.max_exp = 16384;
RealProperties.min_exp = -16381;
With this change the compiler builds and works fine. It is able to successfully complete the build.
It does not crash anymore:
> /home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2 ~/test.d
/usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/13/../../../../lib64/crt1.o: in function `_start':
(.text+0x1b): undefined reference to `main'
collect2: error: ld returned 1 exit status
Error: /usr/bin/cc failed with status: 1
I know it looks bizarre, but if I move this printf() one line up or down, the crash is not gone. Only this specific line fixes the crash.
The printf-patched compiler works fine, as it is able to properly build itself, when used instead DMD.
Also, building with this ldc2 does not require printf-patch. Compiler builds as-is.
> /home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2 --version śro, 20 wrz 2023, 10:48:57
LDC - the LLVM D compiler (1.34.0):
based on DMD v2.104.2 and LLVM 15.0.7
built with LDC - the LLVM D compiler (1.34.0)
Default target: x86_64-unknown-linux-gnu
Host CPU: znver3
http://dlang.org - http://wiki.dlang.org/LDC
Registered Targets:
aarch64 - AArch64 (little endian)
aarch64_32 - AArch64 (little endian ILP32)
aarch64_be - AArch64 (big endian)
arm64 - ARM64 (little endian)
arm64_32 - ARM64 (little endian ILP32)
x86 - 32-bit X86: Pentium-Pro and above
x86-64 - 64-bit X86: EM64T and AMD64
This sounds bizarre indeed - hacking a printf into the C++ source makes the built compiler work when compiling totally unrelated D parts with DMD?! Anyway, if this is a genuine reproducible issue, it's almost certainly a DMD issue, not an LDC one.
Our CI tests DMD as host compiler too (on Linux and Mac), and those jobs are green - the latest master pipeline was using DMD v2.105.1-beta.1.
This is 100% reproducible on my machine. I've compiled ldc many times during debugging. Several times more when I found it, as I could not believe it.
I have a suspicion that there might be some ABI incompatibility between D objects generated by DMD and C++ objects of LLVM. This is due to the fact, when LDC is generating D object files (via LLVM), the crash is not present.
If you wish to try my build env, check-out "ldc" branch of https://github.com/D-os/dos/tree/ldc and make ldc.
I have a suspicion that there might be some ABI incompatibility between D objects generated by DMD and C++ objects of LLVM. This is due to the fact, when LDC is generating D object files (via LLVM), the crash is not present.
This is why kinke said that it is probably a DMD bug (so the bug belongs in DMD's bug tracker, not LDC).
The printf doesn't affect the ABI, and as said, it works for CI (I doubt this is a DMD v2.105.2 regression). What linker are you using, and can you try different ones?
/usr/bin/ld --version
GNU ld version 2.39-9.fc38
I have mold built. I will try linking with it.
Yeah well I wouldn't consider mold to be an extremely stable linker to be used as a reference. I'd definitely try gold and (recent) lld.
Unfortunately no change with gold nor lld. Still crashes.
GNU gold (version 2.39-9.fc38) 1.16
LLD 16.0.6 (compatible with GNU linkers)
Hmm then I'm out of ideas - bizarre. Btw any good reason for using a DMD host compiler? DMD's own release builds are built with LDC, because it's ~50% faster then.
Not really… I wanted to go with "official" compiler in my build instructions. ¯\(ツ)/¯
Go to https://dlang.org/download.html and download a build for your distribution.
That's what I did. I just clicked the proper button and had the compiler installed in few seconds.
I've just tried ldc packaged by Fedora.
[35/181] Linking CXX executable bin/FileCheck
ninja: job failed: : && /home/smoku/devel/Dos/dos/out/host/bin/clang++ -DDMDV2 -O3 -DNDEBUG obj/ldmd2.o -o bin/ldmd2 lib/libldmd.a -llldMinGW -llldCOFF -llldELF -llldMachO -llldWasm -llldCommon -lLLVMSymbolize -lLLVMWindowsManifest -lLLVMWindowsDriver -lLLVMLTO -lLLVMExtensions -lPolly -lPollyISL -lLLVMPasses -lLLVMObjCARCOpts -lLLVMCoroutines -lLLVMLibDriver -lLLVMOption -lLLVMipo -lLLVMVectorize -lLLVMLinker -lLLVMIRReader -lLLVMFrontendOpenMP -lLLVMAsmParser -lLLVMX86TargetMCA -lLLVMMCA -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMX86Desc -lLLVMX86Info -lLLVMInstrumentation -lLLVMAArch64Disassembler -lLLVMMCDisassembler -lLLVMAArch64AsmParser -lLLVMAArch64CodeGen -lLLVMCFGuard -lLLVMGlobalISel -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMCodeGen -lLLVMTarget -lLLVMScalarOpts -lLLVMInstCombine -lLLVMAggressiveInstCombine -lLLVMTransformUtils -lLLVMBitWriter -lLLVMAnalysis -lLLVMProfileData -lLLVMSymbolize -lLLVMDebugInfoPDB -lLLVMDebugInfoMSF -lLLVMDebugInfoDWARF -lLLVMObject -lLLVMTextAPI -lLLVMMCParser -lLLVMBitReader -lLLVMCore -lLLVMRemarks -lLLVMBitstreamReader -lLLVMAArch64Desc -lLLVMAArch64Utils -lLLVMAArch64Info -lLLVMMC -lLLVMDebugInfoCodeView -lLLVMBinaryFormat -lLLVMSupport -lLLVMDemangle -L/home/smoku/devel/Dos/dos/out/host/lib -lrt -ldl -lm -lz -lzstd -lxml2 -Wl,--export-dynamic /usr/lib64/ldc_rt.dso.o -L/usr/lib64 -lphobos2-ldc-shared -ldruntime-ldc-shared -Wl,--gc-sections -lrt -ldl -lpthread -lm -m64 -lLLVMWindowsManifest -lLLVMWindowsDriver -lLLVMLTO -lLLVMExtensions -lPolly -lPollyISL -lLLVMPasses -lLLVMObjCARCOpts -lLLVMCoroutines -lLLVMLibDriver -lLLVMOption -lLLVMipo -lLLVMVectorize -lLLVMLinker -lLLVMIRReader -lLLVMFrontendOpenMP -lLLVMAsmParser -lLLVMX86TargetMCA -lLLVMMCA -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMX86Desc -lLLVMX86Info -lLLVMInstrumentation -lLLVMAArch64Disassembler -lLLVMMCDisassembler -lLLVMAArch64AsmParser -lLLVMAArch64CodeGen -lLLVMCFGuard -lLLVMGlobalISel -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMCodeGen -lLLVMTarget -lLLVMScalarOpts -lLLVMInstCombine -lLLVMAggressiveInstCombine -lLLVMTransformUtils -lLLVMBitWriter -lLLVMAnalysis -lLLVMProfileData -lLLVMDebugInfoPDB -lLLVMDebugInfoMSF -lLLVMDebugInfoDWARF -lLLVMObject -lLLVMTextAPI -lLLVMMCParser -lLLVMBitReader -lLLVMCore -lLLVMRemarks -lLLVMBitstreamReader -lLLVMAArch64Desc -lLLVMAArch64Utils -lLLVMAArch64Info -lLLVMMC -lLLVMDebugInfoCodeView -lLLVMBinaryFormat -lLLVMSupport -lLLVMDemangle -lrt -ldl -lm -lz -lzstd -lxml2 /usr/lib64/ldc_rt.dso.o -lphobos2-ldc-shared -ldruntime-ldc-shared -lpthread -lrt -ldl -lm -lz -lzstd -lxml2 /usr/lib64/ldc_rt.dso.o -lphobos2-ldc-shared -ldruntime-ldc-shared -lpthread && :
/usr/bin/ld: /usr/lib64/ldc_rt.dso.o: in function `_D2rt3dso12register_dsoFZv':
dso.d:(.text._D2rt3dso12register_dsoFZv+0x0): multiple definition of `_D2rt3dso12register_dsoFZv'; /usr/lib64/ldc_rt.dso.o:dso.d:(.text._D2rt3dso12register_dsoFZv+0x0): first defined here
/usr/bin/ld: /usr/lib64/ldc_rt.dso.o:(.bss._D2rt3dso7dsoDataSQq19sections_elf_shared15CompilerDSOData+0x0): multiple definition of `_D2rt3dso7dsoDataSQq19sections_elf_shared15CompilerDSOData'; /usr/lib64/ldc_rt.dso.o:(.bss._D2rt3dso7dsoDataSQq19sections_elf_shared15CompilerDSOData+0x0): first defined here
/usr/bin/ld: /usr/lib64/ldc_rt.dso.o:(.bss._D2rt3dso7dsoSlotPv+0x0): multiple definition of `_D2rt3dso7dsoSlotPv'; /usr/lib64/ldc_rt.dso.o:(.bss._D2rt3dso7dsoSlotPv+0x0): first defined here
/usr/bin/ld: /usr/lib64/ldc_rt.dso.o: in function `_D2rt3dso14unregister_dsoFZv':
dso.d:(.text._D2rt3dso14unregister_dsoFZv+0x0): multiple definition of `_D2rt3dso14unregister_dsoFZv'; /usr/lib64/ldc_rt.dso.o:dso.d:(.text._D2rt3dso14unregister_dsoFZv+0x0): first defined here
/usr/bin/ld: /usr/lib64/ldc_rt.dso.o:(.bss.__rt_dso_ref+0x0): multiple definition of `__rt_dso_ref'; /usr/lib64/ldc_rt.dso.o:(.bss.__rt_dso_ref+0x0): first defined here
/usr/bin/ld: /usr/lib64/ldc_rt.dso.o: in function `_D2rt3dso12register_dsoFZv':
dso.d:(.text._D2rt3dso12register_dsoFZv+0x0): multiple definition of `_D2rt3dso12register_dsoFZv'; /usr/lib64/ldc_rt.dso.o:dso.d:(.text._D2rt3dso12register_dsoFZv+0x0): first defined here
/usr/bin/ld: /usr/lib64/ldc_rt.dso.o:(.bss._D2rt3dso7dsoDataSQq19sections_elf_shared15CompilerDSOData+0x0): multiple definition of `_D2rt3dso7dsoDataSQq19sections_elf_shared15CompilerDSOData'; /usr/lib64/ldc_rt.dso.o:(.bss._D2rt3dso7dsoDataSQq19sections_elf_shared15CompilerDSOData+0x0): first defined here
/usr/bin/ld: /usr/lib64/ldc_rt.dso.o:(.bss._D2rt3dso7dsoSlotPv+0x0): multiple definition of `_D2rt3dso7dsoSlotPv'; /usr/lib64/ldc_rt.dso.o:(.bss._D2rt3dso7dsoSlotPv+0x0): first defined here
/usr/bin/ld: /usr/lib64/ldc_rt.dso.o: in function `_D2rt3dso14unregister_dsoFZv':
dso.d:(.text._D2rt3dso14unregister_dsoFZv+0x0): multiple definition of `_D2rt3dso14unregister_dsoFZv'; /usr/lib64/ldc_rt.dso.o:dso.d:(.text._D2rt3dso14unregister_dsoFZv+0x0): first defined here
/usr/bin/ld: /usr/lib64/ldc_rt.dso.o:(.bss.__rt_dso_ref+0x0): multiple definition of `__rt_dso_ref'; /usr/lib64/ldc_rt.dso.o:(.bss.__rt_dso_ref+0x0): first defined here
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
> rpm -qf /usr/lib64/ldc_rt.dso.o
ldc-1.32.2-1.fc38.x86_64
With gdc (+ gdmd wrapper) build fails with:
ninja: job failed: : && /home/smoku/devel/Dos/dos/out/host/bin/clang++ -DDMDV2 -O3 -DNDEBUG obj/ldmd2.o -o bin/ldmd2 lib/libldmd.a -llldMinGW -llldCOFF -llldELF -llldMachO -llldWasm -llldCommon -lLLVMSymbolize -lLLVMWindowsManifest -lLLVMWindowsDriver -lLLVMLTO -lLLVMExtensions -lPolly -lPollyISL -lLLVMPasses -lLLVMObjCARCOpts -lLLVMCoroutines -lLLVMLibDriver -lLLVMOption -lLLVMipo -lLLVMVectorize -lLLVMLinker -lLLVMIRReader -lLLVMFrontendOpenMP -lLLVMAsmParser -lLLVMX86TargetMCA -lLLVMMCA -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMX86Desc -lLLVMX86Info -lLLVMInstrumentation -lLLVMAArch64Disassembler -lLLVMMCDisassembler -lLLVMAArch64AsmParser -lLLVMAArch64CodeGen -lLLVMCFGuard -lLLVMGlobalISel -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMCodeGen -lLLVMTarget -lLLVMScalarOpts -lLLVMInstCombine -lLLVMAggressiveInstCombine -lLLVMTransformUtils -lLLVMBitWriter -lLLVMAnalysis -lLLVMProfileData -lLLVMSymbolize -lLLVMDebugInfoPDB -lLLVMDebugInfoMSF -lLLVMDebugInfoDWARF -lLLVMObject -lLLVMTextAPI -lLLVMMCParser -lLLVMBitReader -lLLVMCore -lLLVMRemarks -lLLVMBitstreamReader -lLLVMAArch64Desc -lLLVMAArch64Utils -lLLVMAArch64Info -lLLVMMC -lLLVMDebugInfoCodeView -lLLVMBinaryFormat -lLLVMSupport -lLLVMDemangle -L/home/smoku/devel/Dos/dos/out/host/lib -lrt -ldl -lm -lz -lzstd -lxml2 -Wl,--export-dynamic -L/usr/lib/gcc/x86_64-redhat-linux/13 -L/usr/lib/gcc/x86_64-redhat-linux/13/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-redhat-linux/13/../../.. -lgphobos -lgcc_s -lgcc -lm -lc -lgcc_s -lgcc -lLLVMWindowsManifest -lLLVMWindowsDriver -lLLVMLTO -lLLVMExtensions -lPolly -lPollyISL -lLLVMPasses -lLLVMObjCARCOpts -lLLVMCoroutines -lLLVMLibDriver -lLLVMOption -lLLVMipo -lLLVMVectorize -lLLVMLinker -lLLVMIRReader -lLLVMFrontendOpenMP -lLLVMAsmParser -lLLVMX86TargetMCA -lLLVMMCA -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMX86Desc -lLLVMX86Info -lLLVMInstrumentation -lLLVMAArch64Disassembler -lLLVMMCDisassembler -lLLVMAArch64AsmParser -lLLVMAArch64CodeGen -lLLVMCFGuard -lLLVMGlobalISel -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMCodeGen -lLLVMTarget -lLLVMScalarOpts -lLLVMInstCombine -lLLVMAggressiveInstCombine -lLLVMTransformUtils -lLLVMBitWriter -lLLVMAnalysis -lLLVMProfileData -lLLVMDebugInfoPDB -lLLVMDebugInfoMSF -lLLVMDebugInfoDWARF -lLLVMObject -lLLVMTextAPI -lLLVMMCParser -lLLVMBitReader -lLLVMCore -lLLVMRemarks -lLLVMBitstreamReader -lLLVMAArch64Desc -lLLVMAArch64Utils -lLLVMAArch64Info -lLLVMMC -lLLVMDebugInfoCodeView -lLLVMBinaryFormat -lLLVMSupport -lLLVMDemangle -lrt -ldl -lm -lz -lzstd -lxml2 -lgphobos -lgcc_s -lgcc -lc -lm -lz -lzstd -lxml2 -lgphobos -lgcc_s -lgcc -lc && :
/usr/bin/ld: obj/ldmd2.o: relocation R_X86_64_32 against `.rodata' can not be used when making a PIE object; recompile with -fPIE
/usr/bin/ld: failed to set dynamic section sizes: bad value
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: subcommand failed
> gdmd --version
gdc (GCC) 13.2.1 20230728 (Red Hat 13.2.1-1)
Adding -DD_COMPILER_FLAGS="-fPIC" to cmake call fixes compilation with gdmd.
> /home/smoku/devel/Dos/dos/out/build/_host/ldc/bin/ldc2 --version
LDC - the LLVM D compiler (1.34.0):
based on DMD v2.104.2 and LLVM 15.0.7
built with gdc (GCC) 13.2.1 20230728 (Red Hat 13.2.1-1)
Default target: x86_64-unknown-linux-gnu
Host CPU: znver3
http://dlang.org - http://wiki.dlang.org/LDC
Registered Targets:
aarch64 - AArch64 (little endian)
aarch64_32 - AArch64 (little endian ILP32)
aarch64_be - AArch64 (big endian)
arm64 - ARM64 (little endian)
arm64_32 - ARM64 (little endian ILP32)
x86 - 32-bit X86: Pentium-Pro and above
x86-64 - 64-bit X86: EM64T and AMD64
Built compiler works fine.
This is all bizarre because the ldc compiler as packaged in Fedora certainly can compile itself and other packages in Fedora. I think it may be something to do with using clang vs gcc - the Fedora-packaged ldc is built using gcc.
