• Thomas Mader (13/13) Dec 22 2018 Hello,
• Stefan Koch (4/17) Dec 22 2018 run a make clean.
• Thomas Mader (8/30) Dec 22 2018 It's always a fresh build when building a NixOS package.
• Thomas Mader (292/299) Dec 22 2018 I enabled more debug output from the Nix environment so the
• Thomas Mader (340/342) Dec 22 2018 The part with fp.c:
• Walter Bright (5/6) Dec 22 2018 It means the file evalu8.d was referencing a function or symbol named "m...
• Thomas Mader (13/19) Dec 22 2018 To me it looks like fp.c has the implementation and evalu8 is
• Walter Bright (5/8) Dec 23 2018 I wonder why you're compile some parts with g++ and some with ldc.
• Jacob Carlborg (4/5) Dec 23 2018 Because fp.c is a C++ file?
• Walter Bright (2/8) Dec 23 2018 ldc should be paired with clang.
• Thomas Mader (25/35) Dec 23 2018 You are right I also like to keep things the same and less
• Thomas Mader (3/5) Dec 23 2018 No it's not a solution. The same problem is reproducible on OSX
• Johan Engelen (10/24) Dec 23 2018 It is normal to use g++ with ldc. You should use your system
• Thomas Mader (3/5) Dec 23 2018 I came to the same conclusion after finishing my tests.
• Joakim (9/16) Dec 23 2018 According to Johan, this bug was introduced by a pull kinke and I

Thomas Mader <thomas.mader gmail.com> writes:

Hello,

I updated dmd on NixOS from 2.081.2 to 2.083.1 but get the 
following linker errors when the backend is linked:

../generated/linux/release/64/backend.a(evalu8.o):dmd/backend/evalu8.d:function
evalu8(elem*, unsigned int): error: undefined reference to '_Z7_moduloeS_'
../generated/linux/release/64/backend.a(evalu8.o):dmd/backend/evalu8.d:function
evalu8(elem*, unsigned int): error: undefined reference to '_Z7_moduloeS_'
../generated/linux/release/64/backend.a(evalu8.o):dmd/backend/evalu8.d:function
evalu8(elem*, unsigned int): error: undefined reference to '_Z7_moduloeS_'
collect2: error: ld returned 1 exit status
Error: 
/nix/store/klci955kxil7q32ggran6lnhpnkk8yjz-gcc-wrapper-7.3.0/bin/c++ failed
with status: 1

I use ldc 1.13.0 as my bootstrap compiler but Archlinux does that 
too so I don't think that's the reason.
Anybody an idea?

Thomas

Stefan Koch <uplink.coder googlemail.com> writes:

On Saturday, 22 December 2018 at 21:58:13 UTC, Thomas Mader wrote:
 Hello,

 I updated dmd on NixOS from 2.081.2 to 2.083.1 but get the 
 following linker errors when the backend is linked:

 ../generated/linux/release/64/backend.a(evalu8.o):dmd/backe
d/evalu8.d:function evalu8(elem*, unsigned int): error: undefined reference to
'_Z7_moduloeS_'
 ../generated/linux/release/64/backend.a(evalu8.o):dmd/backe
d/evalu8.d:function evalu8(elem*, unsigned int): error: undefined reference to
'_Z7_moduloeS_'
 ../generated/linux/release/64/backend.a(evalu8.o):dmd/backe
d/evalu8.d:function evalu8(elem*, unsigned int): error: undefined reference to
'_Z7_moduloeS_'
 collect2: error: ld returned 1 exit status
 Error: 
 /nix/store/klci955kxil7q32ggran6lnhpnkk8yjz-gcc-wrapper-7.3.0/bin/c++ failed
with status: 1

 I use ldc 1.13.0 as my bootstrap compiler but Archlinux does 
 that too so I don't think that's the reason.
 Anybody an idea?

 Thomas

run a make clean.
probably files which changed in the backend are not recompiled?

Otherwise it's mangling bugs.

Thomas Mader <thomas.mader gmail.com> writes:

On Saturday, 22 December 2018 at 22:40:18 UTC, Stefan Koch wrote:
 On Saturday, 22 December 2018 at 21:58:13 UTC, Thomas Mader 
 wrote:
 Hello,

 I updated dmd on NixOS from 2.081.2 to 2.083.1 but get the 
 following linker errors when the backend is linked:

 ../generated/linux/release/64/backend.a(evalu8.o):dmd/backe
d/evalu8.d:function evalu8(elem*, unsigned int): error: undefined reference to
'_Z7_moduloeS_'
 ../generated/linux/release/64/backend.a(evalu8.o):dmd/backe
d/evalu8.d:function evalu8(elem*, unsigned int): error: undefined reference to
'_Z7_moduloeS_'
 ../generated/linux/release/64/backend.a(evalu8.o):dmd/backe
d/evalu8.d:function evalu8(elem*, unsigned int): error: undefined reference to
'_Z7_moduloeS_'
 collect2: error: ld returned 1 exit status
 Error: 
 /nix/store/klci955kxil7q32ggran6lnhpnkk8yjz-gcc-wrapper-7.3.0/bin/c++ failed
with status: 1

 I use ldc 1.13.0 as my bootstrap compiler but Archlinux does 
 that too so I don't think that's the reason.
 Anybody an idea?

 Thomas

 run a make clean.
 probably files which changed in the backend are not recompiled?

 Otherwise it's mangling bugs.

It's always a fresh build when building a NixOS package.
I looked into backend.a for the symbol:

objdump -D backend.a | grep modulo
0000000000000040 <_Z7_moduloee>:
   40:	e9 00 00 00 00       	jmpq   45 <_Z7_moduloee+0x5>

Maybe that's connected to 
https://forum.dlang.org/post/odimguuqtekosmtliyhf forum.dlang.org

Thomas Mader <thomas.mader gmail.com> writes:

On Saturday, 22 December 2018 at 23:02:04 UTC, Thomas Mader wrote:
 It's always a fresh build when building a NixOS package.
 I looked into backend.a for the symbol:

 objdump -D backend.a | grep modulo
 0000000000000040 <_Z7_moduloee>:
   40:	e9 00 00 00 00       	jmpq   45 <_Z7_moduloee+0x5>

 Maybe that's connected to 
 https://forum.dlang.org/post/odimguuqtekosmtliyhf forum.dlang.org

I enabled more debug output from the Nix environment so the 
compiler flags can be seen.

CC="c++" ldmd2 -of../generated/linux/release/64/dmd -m64 -vtls 
-J../generated/linux/release/64 -J../res -L-lstdc++  
-version=MARS -fPIC -J../generated/linux/release/64 -w -de -O 
-release -inline dmd/access.d dmd/aggregate.d dmd/aliasthis.d 
dmd/apply.d dmd/argtypes.d dmd/arrayop.d dmd/arraytypes.d 
dmd/astcodegen.d dmd/attrib.d dmd/builtin.d dmd/canthrow.d 
dmd/cli.d dmd/clone.d dmd/compiler.d dmd/complex.d dmd/cond.d 
dmd/constfold.d dmd/cppmangle.d dmd/cppmanglewin.d dmd/ctfeexpr.d 
dmd/ctorflow.d dmd/dcast.d dmd/dclass.d dmd/declaration.d 
dmd/delegatize.d dmd/denum.d dmd/dimport.d dmd/dinifile.d 
dmd/dinterpret.d dmd/dmacro.d dmd/dmangle.d dmd/dmodule.d 
dmd/doc.d dmd/dscope.d dmd/dstruct.d dmd/dsymbol.d 
dmd/dsymbolsem.d dmd/dtemplate.d dmd/dversion.d dmd/escape.d 
dmd/expression.d dmd/expressionsem.d dmd/func.d dmd/hdrgen.d 
dmd/id.d dmd/impcnvtab.d dmd/imphint.d dmd/init.d dmd/initsem.d 
dmd/inline.d dmd/inlinecost.d dmd/intrange.d dmd/json.d 
dmd/lambdacomp.d dmd/lib.d dmd/libelf.d dmd/libmach.d dmd/link.d 
dmd/mars.d dmd/mtype.d dmd/nogc.d dmd/nspace.d dmd/objc.d 
dmd/opover.d dmd/optimize.d dmd/parse.d dmd/permissivevisitor.d 
dmd/sapply.d dmd/templateparamsem.d dmd/sideeffect.d 
dmd/statement.d dmd/staticassert.d dmd/target.d dmd/typesem.d 
dmd/traits.d dmd/transitivevisitor.d dmd/parsetimevisitor.d 
dmd/visitor.d dmd/typinf.d dmd/utils.d dmd/scanelf.d 
dmd/scanmach.d dmd/statement_rewrite_walker.d dmd/statementsem.d 
dmd/staticcond.d dmd/safe.d dmd/blockexit.d dmd/printast.d 
dmd/semantic2.d dmd/semantic3.d dmd/irstate.d dmd/toctype.d 
dmd/glue.d dmd/gluelayer.d dmd/todt.d dmd/tocsym.d dmd/toir.d 
dmd/dmsc.d dmd/tocvdebug.d dmd/s2ir.d dmd/toobj.d dmd/e2ir.d 
dmd/eh.d dmd/iasm.d dmd/iasmdmd.d dmd/iasmgcc.d dmd/objc_glue.d 
dmd/backend/cc.d dmd/backend/cdef.d dmd/backend/cgcv.d 
dmd/backend/code.d dmd/backend/cv4.d dmd/backend/dt.d 
dmd/backend/el.d dmd/backend/global.d dmd/backend/obj.d 
dmd/backend/oper.d dmd/backend/outbuf.d dmd/backend/rtlsym.d 
dmd/backend/code_x86.d dmd/backend/iasm.d dmd/backend/ty.d 
dmd/backend/type.d dmd/backend/exh.d dmd/backend/mach.d 
dmd/backend/mscoff.d dmd/backend/dwarf.d dmd/backend/dwarf2.d 
dmd/backend/xmm.d dmd/backend/dlist.d dmd/backend/melf.d 
dmd/backend/varstats.d dmd/root/aav.d dmd/root/man.d 
dmd/root/response.d dmd/root/speller.d dmd/root/longdouble.d 
../generated/linux/release/64/newdelete.o 
../generated/linux/release/64/backend.a 
../generated/linux/release/64/lexer.a
HARDENING: disabled flags: pie
HARDENING: Is active (not completely disabled with "all" flag)
HARDENING: enabling fortify
HARDENING: enabling stackprotector
HARDENING: enabling strictoverflow
HARDENING: enabling format
HARDENING: enabling pic
extra flags before to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -O2
   -D_FORTIFY_SOURCE=2
   -fstack-protector-strong
   --param
   ssp-buffer-size=4
   -fno-strict-overflow
   -Wformat
   -Wformat-security
   -Werror=format-security
   -fPIC
   -Wl\,-dynamic-linker
   
-Wl\,/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib/ld-linux-x86-64.so.2
original flags to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   ../generated/linux/release/64/dmd.o
   ../generated/linux/release/64/newdelete.o
   ../generated/linux/release/64/backend.a
   ../generated/linux/release/64/lexer.a
   -o
   ../generated/linux/release/64/dmd
   -fuse-ld=gold
   -lstdc++
   
-L/nix/store/r29igl9gz0r6cvb3i28xh03anx936qbl-ldcBuild-1.13.0/lib
   -lphobos2-ldc
   -ldruntime-ldc
   -Wl\,--gc-sections
   -lrt
   -ldl
   -lpthread
   -lm
   -m64
extra flags after to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -B/nix/store/x6inizi5ahlyhqxxwv1rvn05a25icarq-gcc-7.3.0-lib/lib
   -B/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib/
   -idirafter
   
/nix/store/psqblh5bsgkbkhn4r648pgjw5rq4npkv-glibc-2.27-dev/include
   -idirafter
   
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/lib/gcc/x86_64-unknown-linux-gnu/7.3.0/include-fixed
   
-B/nix/store/klci955kxil7q32ggran6lnhpnkk8yjz-gcc-wrapper-7.3.0/bin/
   -isystem
   /nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/include
   -isystem
   /nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/include
   -isystem
   
/nix/store/yhckr5a12np73av4c4k1v1ffqj0bx53h-curl-7.62.0-dev/include
   -isystem
   
/nix/store/s7f8awsadn61qmbz1mfniw2c3zxcifq0-nghttp2-1.35.0-dev/include
   -isystem
   
/nix/store/a50sg2xm6vflzx5kma3sih39dq9wv7z6-zlib-1.2.11-dev/include
   -isystem
   
/nix/store/jfyrrk9xkqm06x5vcx6cs4qm34bzl39h-libkrb5-1.15.2-dev/include
   -isystem
   
/nix/store/v7gs3pmbg43ys16fbhhc9sq89s4vj236-openssl-1.0.2q-dev/include
   -isystem
   
/nix/store/v42mn058w6gb8ycyf1phvi8f8c9a4k8m-libssh2-1.8.0-dev/include
   -isystem
   
/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/include
   -isystem
   /nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/include
   -isystem
   /nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/include
   -isystem
   
/nix/store/yhckr5a12np73av4c4k1v1ffqj0bx53h-curl-7.62.0-dev/include
   -isystem
   
/nix/store/s7f8awsadn61qmbz1mfniw2c3zxcifq0-nghttp2-1.35.0-dev/include
   -isystem
   
/nix/store/a50sg2xm6vflzx5kma3sih39dq9wv7z6-zlib-1.2.11-dev/include
   -isystem
   
/nix/store/jfyrrk9xkqm06x5vcx6cs4qm34bzl39h-libkrb5-1.15.2-dev/include
   -isystem
   
/nix/store/v7gs3pmbg43ys16fbhhc9sq89s4vj236-openssl-1.0.2q-dev/include
   -isystem
   
/nix/store/v42mn058w6gb8ycyf1phvi8f8c9a4k8m-libssh2-1.8.0-dev/include
   -isystem
   
/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/include
   -Wl\,-rpath
   
-Wl\,/nix/store/r2xapv59sz4cpa9zy9ydzck857r6xmrx-dmdBuild-2.083.1/lib64
   -Wl\,-rpath
   
-Wl\,/nix/store/r2xapv59sz4cpa9zy9ydzck857r6xmrx-dmdBuild-2.083.1/lib
   -L/nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/lib
   -L/nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/lib
   
-L/nix/store/9vh9ysqr8hahnph1gppniv7zrdf218ds-nghttp2-1.35.0-lib/lib
   -L/nix/store/nsrwlly5ikwhppcslaazp547kh7q7j6s-zlib-1.2.11/lib
   -L/nix/store/yi0pwf9hybx6vhj2qdfa6krvxgvcbyi0-libkrb5-1.15.2/lib
   -L/nix/store/3lk4hcp1r6pnrvf91kd5p0ni97nd2dj3-openssl-1.0.2q/lib
   -L/nix/store/za7psqbn9laq73vc5rh657jqpiqn0wag-libssh2-1.8.0/lib
   -L/nix/store/blrfb9855rrxva4xch4r7knwya0il5rl-curl-7.62.0/lib
   
-L/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/lib
   -L/nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/lib
   -L/nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/lib
   
-L/nix/store/9vh9ysqr8hahnph1gppniv7zrdf218ds-nghttp2-1.35.0-lib/lib
   -L/nix/store/nsrwlly5ikwhppcslaazp547kh7q7j6s-zlib-1.2.11/lib
   -L/nix/store/yi0pwf9hybx6vhj2qdfa6krvxgvcbyi0-libkrb5-1.15.2/lib
   -L/nix/store/3lk4hcp1r6pnrvf91kd5p0ni97nd2dj3-openssl-1.0.2q/lib
   -L/nix/store/za7psqbn9laq73vc5rh657jqpiqn0wag-libssh2-1.8.0/lib
   -L/nix/store/blrfb9855rrxva4xch4r7knwya0il5rl-curl-7.62.0/lib
   
-L/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/lib
   -L/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib
   -L/nix/store/x6inizi5ahlyhqxxwv1rvn05a25icarq-gcc-7.3.0-lib/lib
HARDENING: disabled flags: pie
HARDENING: Is active (not completely disabled with "all" flag)
HARDENING: enabling bindnow
HARDENING: enabling relro
extra flags before to 
/nix/store/jdlb06c0kp6sms277xcclfr3gdl8pb9r-binutils-2.30/bin/ld.gold:
   -z
   now
   -z
   relro
original flags to 
/nix/store/jdlb06c0kp6sms277xcclfr3gdl8pb9r-binutils-2.30/bin/ld.gold:
   -plugin
   
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/libexec/gcc/x86_64-unknown-linux-gnu/7.3.0/liblto_plugin.so
   
-plugin-opt=/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/libexec/gcc/x86_64-unknown-linux-gnu/7.3.0/lto-wrapper
   -plugin-opt=-fresolution=/build/ccNnlge1.res
   -plugin-opt=-pass-through=-lgcc_s
   -plugin-opt=-pass-through=-lgcc
   -plugin-opt=-pass-through=-lc
   -plugin-opt=-pass-through=-lgcc_s
   -plugin-opt=-pass-through=-lgcc
   --eh-frame-hdr
   -m
   elf_x86_64
   -dynamic-linker
   
/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib64/ld-linux-x86-64.so.2
   -o
   ../generated/linux/release/64/dmd
   
/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib/crt1.o
   
/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib/crti.o
   
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/lib/gcc/x86_64-unknown-linux-gnu/7.3.0/crtbegin.o
   
-L/nix/store/r29igl9gz0r6cvb3i28xh03anx936qbl-ldcBuild-1.13.0/lib
   -L/nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/lib
   -L/nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/lib
   
-L/nix/store/9vh9ysqr8hahnph1gppniv7zrdf218ds-nghttp2-1.35.0-lib/lib
   -L/nix/store/nsrwlly5ikwhppcslaazp547kh7q7j6s-zlib-1.2.11/lib
   -L/nix/store/yi0pwf9hybx6vhj2qdfa6krvxgvcbyi0-libkrb5-1.15.2/lib
   -L/nix/store/3lk4hcp1r6pnrvf91kd5p0ni97nd2dj3-openssl-1.0.2q/lib
   -L/nix/store/za7psqbn9laq73vc5rh657jqpiqn0wag-libssh2-1.8.0/lib
   -L/nix/store/blrfb9855rrxva4xch4r7knwya0il5rl-curl-7.62.0/lib
   
-L/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/lib
   -L/nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/lib
   -L/nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/lib
   
-L/nix/store/9vh9ysqr8hahnph1gppniv7zrdf218ds-nghttp2-1.35.0-lib/lib
   -L/nix/store/nsrwlly5ikwhppcslaazp547kh7q7j6s-zlib-1.2.11/lib
   -L/nix/store/yi0pwf9hybx6vhj2qdfa6krvxgvcbyi0-libkrb5-1.15.2/lib
   -L/nix/store/3lk4hcp1r6pnrvf91kd5p0ni97nd2dj3-openssl-1.0.2q/lib
   -L/nix/store/za7psqbn9laq73vc5rh657jqpiqn0wag-libssh2-1.8.0/lib
   -L/nix/store/blrfb9855rrxva4xch4r7knwya0il5rl-curl-7.62.0/lib
   
-L/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/lib
   -L/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib
   -L/nix/store/x6inizi5ahlyhqxxwv1rvn05a25icarq-gcc-7.3.0-lib/lib
   -L/nix/store/x6inizi5ahlyhqxxwv1rvn05a25icarq-gcc-7.3.0-lib/lib
   -L/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib
   
-L/nix/store/klci955kxil7q32ggran6lnhpnkk8yjz-gcc-wrapper-7.3.0/bin
   
-L/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/lib/gcc/x86_64-unknown-linux-gnu/7.3.0
   
-L/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/lib/gcc/x86_64-unknown-linux-gnu/7.3.0/../../../../lib64
   
-L/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/lib/gcc/x86_64-unknown-linux-gnu/7.3.0/../../..
   -dynamic-linker
   
/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib/ld-linux-x86-64.so.2
   ../generated/linux/release/64/dmd.o
   ../generated/linux/release/64/newdelete.o
   ../generated/linux/release/64/backend.a
   ../generated/linux/release/64/lexer.a
   -lstdc++
   -lphobos2-ldc
   -ldruntime-ldc
   --gc-sections
   -lrt
   -ldl
   -lpthread
   -rpath
   
/nix/store/r2xapv59sz4cpa9zy9ydzck857r6xmrx-dmdBuild-2.083.1/lib64
   -rpath
   /nix/store/r2xapv59sz4cpa9zy9ydzck857r6xmrx-dmdBuild-2.083.1/lib
   -lstdc++
   -lm
   -lgcc_s
   -lgcc
   -lc
   -lgcc_s
   -lgcc
   
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/lib/gcc/x86_64-unknown-linux-gnu/7.3.0/crtend.o
   
/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib/crtn.o
extra flags after to 
/nix/store/jdlb06c0kp6sms277xcclfr3gdl8pb9r-binutils-2.30/bin/ld.gold:
   -rpath
   /nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib
   -rpath
   /nix/store/x6inizi5ahlyhqxxwv1rvn05a25icarq-gcc-7.3.0-lib/lib
../generated/linux/release/64/backend.a(evalu8.o):dmd/backend/evalu8.d:function
evalu8(elem*, unsigned int): error: undefined reference to '_Z7_moduloeS_'
../generated/linux/release/64/backend.a(evalu8.o):dmd/backend/evalu8.d:function
evalu8(elem*, unsigned int): error: undefined reference to '_Z7_moduloeS_'
../generated/linux/release/64/backend.a(evalu8.o):dmd/backend/evalu8.d:function
evalu8(elem*, unsigned int): error: undefined reference to '_Z7_moduloeS_'
collect2: error: ld returned 1 exit status

Thomas Mader <thomas.mader gmail.com> writes:

On Saturday, 22 December 2018 at 23:29:13 UTC, Thomas Mader wrote:
 I enabled more debug output from the Nix environment so the 
 compiler flags can be seen.

The part with fp.c:

   (CC)  BACK_OBJS  dmd/backend/fp.c
c++ -c -o../generated/linux/release/64/fp.o -Wno-deprecated 
-Wstrict-aliasing -Werror -fno-exceptions -fno-rtti -D__pascal= 
-DMARS=1 -DTARGET_LINUX=1 -DDM_TARGET_CPU_X86=1 -m64 -fPIC 
-std=gnu++98 -O2 -Idmd/root -Idmd/tk -Idmd/backend 
-I../generated/linux/release/64 -Idmd -DDMDV2=1 -MMD -MF 
../generated/linux/release/64/fp.deps dmd/backend/fp.c
   (CC)  BACK_OBJS  dmd/backend/cgen.c
c++ -c -o../generated/linux/release/64/cgen.o -Wno-deprecated 
-Wstrict-aliasing -Werror -fno-exceptions -fno-rtti -D__pascal= 
-DMARS=1 -DTARGET_LINUX=1 -DDM_TARGET_CPU_X86=1 -m64 -fPIC 
-std=gnu++98 -O2 -Idmd/root -Idmd/tk -Idmd/backend 
-I../generated/linux/release/64 -Idmd -DDMDV2=1 -MMD -MF 
../generated/linux/release/64/cgen.deps dmd/backend/cgen.c
HARDENING: disabled flags: pie
HARDENING: Is active (not completely disabled with "all" flag)
HARDENING: enabling fortify
HARDENING: enabling stackprotector
HARDENING: enabling strictoverflow
HARDENING: enabling format
HARDENING: enabling pic
extra flags before to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -O2
   -D_FORTIFY_SOURCE=2
   -fstack-protector-strong
   --param
   ssp-buffer-size=4
   -fno-strict-overflow
   -Wformat
   -Wformat-security
   -Werror=format-security
   -fPIC
original flags to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -c
   -o../generated/linux/release/64/os.o
   -Wno-deprecated
   -Wstrict-aliasing
   -Werror
   -fno-exceptions
   -fno-rtti
   -D__pascal=
   -DMARS=1
   -DTARGET_LINUX=1
   -DDM_TARGET_CPU_X86=1
   -m64
   -fPIC
   -std=gnu++98
   -O2
   -Idmd/root
   -Idmd/tk
   -Idmd/backend
   -I../generated/linux/release/64
   -Idmd
   -DDMDV2=1
   -MMD
   -MF
   ../generated/linux/release/64/os.deps
   dmd/backend/os.c
extra flags after to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -B/nix/store/x6inizi5ahlyhqxxwv1rvn05a25icarq-gcc-7.3.0-lib/lib
   -B/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib/
   -idirafter
   
/nix/store/psqblh5bsgkbkhn4r648pgjw5rq4npkv-glibc-2.27-dev/include
   -idirafter
   
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/lib/gcc/x86_64-unknown-linux-gnu/7.3.0/include-fixed
   
-B/nix/store/klci955kxil7q32ggran6lnhpnkk8yjz-gcc-wrapper-7.3.0/bin/
   -isystem
   /nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/include
   -isystem
   /nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/include
   -isystem
   
/nix/store/yhckr5a12np73av4c4k1v1ffqj0bx53h-curl-7.62.0-dev/include
   -isystem
   
/nix/store/s7f8awsadn61qmbz1mfniw2c3zxcifq0-nghttp2-1.35.0-dev/include
   -isystem
   
/nix/store/a50sg2xm6vflzx5kma3sih39dq9wv7z6-zlib-1.2.11-dev/include
   -isystem
   
/nix/store/jfyrrk9xkqm06x5vcx6cs4qm34bzl39h-libkrb5-1.15.2-dev/include
   -isystem
   
/nix/store/v7gs3pmbg43ys16fbhhc9sq89s4vj236-openssl-1.0.2q-dev/include
   -isystem
   
/nix/store/v42mn058w6gb8ycyf1phvi8f8c9a4k8m-libssh2-1.8.0-dev/include
   -isystem
   
/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/include
   -isystem
   /nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/include
   -isystem
   /nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/include
   -isystem
   
/nix/store/yhckr5a12np73av4c4k1v1ffqj0bx53h-curl-7.62.0-dev/include
   -isystem
   
/nix/store/s7f8awsadn61qmbz1mfniw2c3zxcifq0-nghttp2-1.35.0-dev/include
   -isystem
   
/nix/store/a50sg2xm6vflzx5kma3sih39dq9wv7z6-zlib-1.2.11-dev/include
   -isystem
   
/nix/store/jfyrrk9xkqm06x5vcx6cs4qm34bzl39h-libkrb5-1.15.2-dev/include
   -isystem
   
/nix/store/v7gs3pmbg43ys16fbhhc9sq89s4vj236-openssl-1.0.2q-dev/include
   -isystem
   
/nix/store/v42mn058w6gb8ycyf1phvi8f8c9a4k8m-libssh2-1.8.0-dev/include
   -isystem
   
/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/include
HARDENING: disabled flags: pie
HARDENING: Is active (not completely disabled with "all" flag)
HARDENING: enabling fortify
HARDENING: enabling stackprotector
HARDENING: enabling strictoverflow
HARDENING: enabling format
HARDENING: enabling pic
HARDENING: disabled flags: pie
HARDENING: Is active (not completely disabled with "all" flag)
extra flags before to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -O2
   -D_FORTIFY_SOURCE=2
   -fstack-protector-strong
   --param
   ssp-buffer-size=4
   -fno-strict-overflow
   -Wformat
   -Wformat-security
   -Werror=format-security
   -fPIC
original flags to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -c
   -o../generated/linux/release/64/fp.o
   -Wno-deprecated
   -Wstrict-aliasing
   -Werror
   -fno-exceptions
   -fno-rtti
   -D__pascal=
   -DMARS=1
   -DTARGET_LINUX=1
   -DDM_TARGET_CPU_X86=1
   -m64
   -fPIC
   -std=gnu++98
   -O2
   -Idmd/root
   -Idmd/tk
   -Idmd/backend
   -I../generated/linux/release/64
   -Idmd
   -DDMDV2=1
   -MMD
   -MF
   ../generated/linux/release/64/fp.deps
   dmd/backend/fp.c
extra flags after to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -B/nix/store/x6inizi5ahlyhqxxwv1rvn05a25icarq-gcc-7.3.0-lib/lib
   -B/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib/
   -idirafter
   
/nix/store/psqblh5bsgkbkhn4r648pgjw5rq4npkv-glibc-2.27-dev/include
   -idirafter
   
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/lib/gcc/x86_64-unknown-linux-gnu/7.3.0/include-fixed
   
-B/nix/store/klci955kxil7q32ggran6lnhpnkk8yjz-gcc-wrapper-7.3.0/bin/
   -isystem
   /nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/include
   -isystem
   /nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/include
   -isystem
   
/nix/store/yhckr5a12np73av4c4k1v1ffqj0bx53h-curl-7.62.0-dev/include
   -isystem
   
/nix/store/s7f8awsadn61qmbz1mfniw2c3zxcifq0-nghttp2-1.35.0-dev/include
   -isystem
   
/nix/store/a50sg2xm6vflzx5kma3sih39dq9wv7z6-zlib-1.2.11-dev/include
   -isystem
   
/nix/store/jfyrrk9xkqm06x5vcx6cs4qm34bzl39h-libkrb5-1.15.2-dev/include
   -isystem
   
/nix/store/v7gs3pmbg43ys16fbhhc9sq89s4vj236-openssl-1.0.2q-dev/include
   -isystem
   
/nix/store/v42mn058w6gb8ycyf1phvi8f8c9a4k8m-libssh2-1.8.0-dev/include
   -isystem
   
/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/include
   -isystem
   /nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/include
   -isystem
   /nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/include
   -isystem
   
/nix/store/yhckr5a12np73av4c4k1v1ffqj0bx53h-curl-7.62.0-dev/include
   -isystem
   
/nix/store/s7f8awsadn61qmbz1mfniw2c3zxcifq0-nghttp2-1.35.0-dev/include
   -isystem
   
/nix/store/a50sg2xm6vflzx5kma3sih39dq9wv7z6-zlib-1.2.11-dev/include
   -isystem
   
/nix/store/jfyrrk9xkqm06x5vcx6cs4qm34bzl39h-libkrb5-1.15.2-dev/include
   -isystem
   
/nix/store/v7gs3pmbg43ys16fbhhc9sq89s4vj236-openssl-1.0.2q-dev/include
   -isystem
   
/nix/store/v42mn058w6gb8ycyf1phvi8f8c9a4k8m-libssh2-1.8.0-dev/include
   -isystem
   
/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/include
HARDENING: enabling fortify
HARDENING: enabling stackprotector
HARDENING: enabling strictoverflow
HARDENING: enabling format
HARDENING: enabling pic
extra flags before to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -O2
   -D_FORTIFY_SOURCE=2
   -fstack-protector-strong
   --param
   ssp-buffer-size=4
   -fno-strict-overflow
   -Wformat
   -Wformat-security
   -Werror=format-security
   -fPIC
original flags to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -c
   -o../generated/linux/release/64/cgen.o
   -Wno-deprecated
   -Wstrict-aliasing
   -Werror
   -fno-exceptions
   -fno-rtti
   -D__pascal=
   -DMARS=1
   -DTARGET_LINUX=1
   -DDM_TARGET_CPU_X86=1
   -m64
   -fPIC
   -std=gnu++98
   -O2
   -Idmd/root
   -Idmd/tk
   -Idmd/backend
   -I../generated/linux/release/64
   -Idmd
   -DDMDV2=1
   -MMD
   -MF
   ../generated/linux/release/64/cgen.deps
   dmd/backend/cgen.c
extra flags after to 
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/bin/g++:
   -B/nix/store/x6inizi5ahlyhqxxwv1rvn05a25icarq-gcc-7.3.0-lib/lib
   -B/nix/store/xdsjx0gba4id3yyqxv66bxnm2sqixkjj-glibc-2.27/lib/
   -idirafter
   
/nix/store/psqblh5bsgkbkhn4r648pgjw5rq4npkv-glibc-2.27-dev/include
   -idirafter
   
/nix/store/p7j7qg5cri229ihf8nllwjhzgbvgx5d0-gcc-7.3.0/lib/gcc/x86_64-unknown-linux-gnu/7.3.0/include-fixed
   
-B/nix/store/klci955kxil7q32ggran6lnhpnkk8yjz-gcc-wrapper-7.3.0/bin/
   -isystem
   /nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/include
   -isystem
   /nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/include
   -isystem
   
/nix/store/yhckr5a12np73av4c4k1v1ffqj0bx53h-curl-7.62.0-dev/include
   -isystem
   
/nix/store/s7f8awsadn61qmbz1mfniw2c3zxcifq0-nghttp2-1.35.0-dev/include
   -isystem
   
/nix/store/a50sg2xm6vflzx5kma3sih39dq9wv7z6-zlib-1.2.11-dev/include
   -isystem
   
/nix/store/jfyrrk9xkqm06x5vcx6cs4qm34bzl39h-libkrb5-1.15.2-dev/include
   -isystem
   
/nix/store/v7gs3pmbg43ys16fbhhc9sq89s4vj236-openssl-1.0.2q-dev/include
   -isystem
   
/nix/store/v42mn058w6gb8ycyf1phvi8f8c9a4k8m-libssh2-1.8.0-dev/include
   -isystem
   
/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/include
   -isystem
   /nix/store/gvmijbjia22rskv7xfm36004zsyi62mr-ldc-1.13.0/include
   -isystem
   /nix/store/6yf8cndis3p9awh5wmwplyrqv55y4y3a-gdb-8.2/include
   -isystem
   
/nix/store/yhckr5a12np73av4c4k1v1ffqj0bx53h-curl-7.62.0-dev/include
   -isystem
   
/nix/store/s7f8awsadn61qmbz1mfniw2c3zxcifq0-nghttp2-1.35.0-dev/include
   -isystem
   
/nix/store/a50sg2xm6vflzx5kma3sih39dq9wv7z6-zlib-1.2.11-dev/include
   -isystem
   
/nix/store/jfyrrk9xkqm06x5vcx6cs4qm34bzl39h-libkrb5-1.15.2-dev/include
   -isystem
   
/nix/store/v7gs3pmbg43ys16fbhhc9sq89s4vj236-openssl-1.0.2q-dev/include
   -isystem
   
/nix/store/v42mn058w6gb8ycyf1phvi8f8c9a4k8m-libssh2-1.8.0-dev/include
   -isystem
   
/nix/store/9nzy5rd0mk57va1sr4br936pjk24ns8p-tzdata-2018g-dev/include

Walter Bright <newshound2 digitalmars.com> writes:

On 12/22/2018 1:58 PM, Thomas Mader wrote:
 Anybody an idea?

It means the file evalu8.d was referencing a function or symbol named "modulo" 
and the linker couldn't find it.

1) Look in evalu8.d for the reference.

2) grep "modulo" *.d to see where it may be.

Thomas Mader <thomas.mader gmail.com> writes:

On Sunday, 23 December 2018 at 00:11:05 UTC, Walter Bright wrote:
 On 12/22/2018 1:58 PM, Thomas Mader wrote:
 Anybody an idea?

 It means the file evalu8.d was referencing a function or symbol 
 named "modulo" and the linker couldn't find it.

 1) Look in evalu8.d for the reference.

 2) grep "modulo" *.d to see where it may be.

To me it looks like fp.c has the implementation and evalu8 is 
using it.
The name mangling of fp.c compiled with g++ is different from 
evalu8.d compiled with ldc.
drtlsym.d seems to be creating a symbol and I guess that's 
somehow not working in my case.
But if I am right I also don't understand why drtlsym is needed 
at all. Wouldn't it be possible to just declare _modulo as 
extern( C++ ) in evalu8.d?

And how is it possible that drtlsym is not working in my case 
when it is for Archlinux with the same dependencies?
I have not yet found a difference which could explain the problem.

Walter Bright <newshound2 digitalmars.com> writes:

On 12/22/2018 6:29 PM, Thomas Mader wrote:
 To me it looks like fp.c has the implementation and evalu8 is using it.
 The name mangling of fp.c compiled with g++ is different from evalu8.d
compiled 
 with ldc.

I wonder why you're compile some parts with g++ and some with ldc.

When I have trouble with name mangling variations, I use 'grep' to see what the 
name mangling is in the various object files, then I fiddle with the 
declarations until they line up.

Jacob Carlborg <doob me.com> writes:

On 2018-12-23 11:15, Walter Bright wrote:

 I wonder why you're compile some parts with g++ and some with ldc.

Because fp.c is a C++ file?

-- 
/Jacob Carlborg

Walter Bright <newshound2 digitalmars.com> writes:

On 12/23/2018 2:25 AM, Jacob Carlborg wrote:
 On 2018-12-23 11:15, Walter Bright wrote:
 
 I wonder why you're compile some parts with g++ and some with ldc.

 
 Because fp.c is a C++ file?
 

ldc should be paired with clang.

Thomas Mader <thomas.mader gmail.com> writes:

On Sunday, 23 December 2018 at 10:15:53 UTC, Walter Bright wrote:
 On 12/22/2018 6:29 PM, Thomas Mader wrote:
 To me it looks like fp.c has the implementation and evalu8 is 
 using it.
 The name mangling of fp.c compiled with g++ is different from 
 evalu8.d compiled with ldc.

 I wonder why you're compile some parts with g++ and some with 
 ldc.

You are right I also like to keep things the same and less 
complex but to be honest I tried to use clang but failed. The std 
environment in Nix on Linux is gcc and I don't know yet how to 
properly overwrite it.
I also think that this might be one solution to the problem.
Still, it's unclear to me what is going on.

 When I have trouble with name mangling variations, I use 'grep' 
 to see what the name mangling is in the various object files, 
 then I fiddle with the declarations until they line up.

Well the problem is that the mangling produced by g++ is 
_Z7_moduloee but the mangling produced with ldc 1.13.0 on my 
environment is _Z7_moduloeS_ .
The first is a valid mangling according to some online demanglers 
but the last one isn't.
I then tried to compile evalu8 [1] with ldc 1.11.0 and dmd 
2.081.2 and they both produced the correct name mangling.
I tried to change the llvm version used when building ldc but 
that didn't solve my problem or introduced new ones.
I will now try to try again with ldc 1.11.0 but with a fresh 
build so I am sure that the environment for building 1.11.0 is 
exactly the same as for 1.13.0.
If that still doesn't fail the problem must be somewhere in ldc 
1.13.0 in combination with the environment I am using.

[1] ldmd2 -c -of../generated/linux/release/64/evalu8.o  
-version=MARS -fPIC -J../generated/linux/release/64 -w -de -O 
-release -inline -m64 -mv=dmd.backend=dmd/backend -betterC 
dmd/backend/evalu8.d

Thomas Mader <thomas.mader gmail.com> writes:

On Sunday, 23 December 2018 at 12:16:53 UTC, Thomas Mader wrote:
 I also think that this might be one solution to the problem.
 Still, it's unclear to me what is going on.

No it's not a solution. The same problem is reproducible on OSX 
and the std environment of Nix is clang.

Johan Engelen <j j.nl> writes:

On Sunday, 23 December 2018 at 12:16:53 UTC, Thomas Mader wrote:
 On Sunday, 23 December 2018 at 10:15:53 UTC, Walter Bright 
 wrote:
 On 12/22/2018 6:29 PM, Thomas Mader wrote:
 To me it looks like fp.c has the implementation and evalu8 is 
 using it.
 The name mangling of fp.c compiled with g++ is different from 
 evalu8.d compiled with ldc.

 I wonder why you're compile some parts with g++ and some with 
 ldc.

 You are right I also like to keep things the same and less 
 complex but to be honest I tried to use clang but failed. The 
 std environment in Nix on Linux is gcc and I don't know yet how 
 to properly overwrite it.

It is normal to use g++ with ldc. You should use your system 
compiler with ldc, and that's of course not necessarily clang.

The mangling is done by LDC itself, not LLVM, and so it is a bug 
in LDC. In this particular case, the second argument of _modulo 
is the same as the first and the mangler is (incorrectly) 
replacing the type of the second with a backreference to the 
first type. That's what the mangler should do for user types, but 
not for builtin types.

-Johan

Thomas Mader <thomas.mader gmail.com> writes:

On Sunday, 23 December 2018 at 13:05:06 UTC, Johan Engelen wrote:
 The mangling is done by LDC itself, not LLVM, and so it is a 
 bug in LDC.

I came to the same conclusion after finishing my tests.
I created a bug: https://github.com/ldc-developers/ldc/issues/2954

Joakim <dlang joakim.fea.st> writes:

On Sunday, 23 December 2018 at 14:48:29 UTC, Thomas Mader wrote:
 On Sunday, 23 December 2018 at 13:05:06 UTC, Johan Engelen 
 wrote:
 The mangling is done by LDC itself, not LLVM, and so it is a 
 bug in LDC.

 I came to the same conclusion after finishing my tests.
 I created a bug: 
 https://github.com/ldc-developers/ldc/issues/2954

According to Johan, this bug was introduced by a pull kinke and I 
wrote to add support for a different real mangling on 
Android/x64, which broke your mangling that wasn't covered by the 
test suite:

https://github.com/ldc-developers/ldc/pull/2917/files

It appears he is fixing both issues ATM. I suggest you either 
stick with LDC 1.12 as the compiler building DMD for now, or 
backport his eventual patch to LDC 1.13 if you can.