[cfe-dev] Static linking a program

[Wink Saville via cfe-dev]

I've created a simple program [1] which I'm trying to statically link.
I've got it compiling and linking, but it segfaults when I run it. Obvioulsy
I'm linking the wrong libraries, advice appreciated:

  $ cat main.cpp
  #include <iostream>

  int main(int argc, char *argv[]) {
    for (int i=0; i < argc; i++) {
      std::cout << "argv[" << i << "]: " << argv[i] << std::endl;
    }
  }

  $ cat Makefile
  CXX:=clang++
  CFLAGS:=-std=c++17 -Wall -pedantic -static

  LINKER:=ld.lld
  LFLAGS:=-Bstatic
  LIBS=/usr/lib/libstdc++.a
  LIBS+=/usr/lib/gcc/x86_64-pc-linux-gnu/8.1.1/libgcc_eh.a
  LIBS+=/usr/lib/gcc/x86_64-pc-linux-gnu/8.1.1/libgcc.a
  LIBS+=/usr/lib/libc.a
  LIBS+=/usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtn.o

  main: main.o Makefile
  $(LINKER) $(LFLAGS) -o $@ $< $(LIBS)

  main.o: main.cpp Makefile
  $(CXX) $(CFLAGS) -c -o $@ $<

  .PHONY: clean
  clean:
  rm -rf main.o main

  $ ld.lld --version
  LLD 6.0.0 (compatible with GNU linkers)
  wink at wink-desktop:~/prgs/explore-cpp/static-linking

  $ clang++ --version
  clang version 6.0.0 (tags/RELEASE_600/final)
  Target: x86_64-pc-linux-gnu
  Thread model: posix
  InstalledDir: /usr/bin

  $ make clean && make
  rm -rf main.o main
  clang++ -std=c++17 -Wall -pedantic -static -c -o main.o main.cpp
  ld.lld -Bstatic -o main main.o /usr/lib/libstdc++.a
/usr/lib/gcc/x86_64-pc-linux-gnu/8.1.1/libgcc_eh.a
/usr/lib/gcc/x86_64-pc-linux-gnu/8.1.1/libgcc.a /usr/lib/libc.a
/usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtn.o

  wink at wink-desktop:~/prgs/explore-cpp/static-linking (master)
  $ ./main
  Segmentation fault (core dumped)

  wink at wink-desktop:~/prgs/explore-cpp/static-linking (master)
  $ coredumpctl gdb
             PID: 23339 (main)
             UID: 1000 (wink)
             GID: 100 (users)
          Signal: 11 (SEGV)
       Timestamp: Tue 2018-06-26 13:51:43 PDT (7s ago)
    Command Line: ./main
      Executable: /home/wink/prgs/explore-cpp/static-linking/main
   Control Group: /user.slice/user-1000.slice/session-c2.scope
            Unit: session-c2.scope
           Slice: user-1000.slice
         Session: c2
       Owner UID: 1000 (wink)
         Boot ID: 65910f0244bf4b62905c0198842b62d4
      Machine ID: 8f80fd742eae4659baed812cd07a9439
        Hostname: wink-desktop
         Storage:
/var/lib/systemd/coredump/core.main.1000.65910f0244bf4b62905c0198842b62d4.23339.1530046303000000.lz4
         Message: Process 23339 (main) of user 1000 dumped core.

                  Stack trace of thread 23339:
                  #0  0x0000000000382ef6 n/a
(/home/wink/prgs/explore-cpp/static-linking/main)

  GNU gdb (GDB) 8.1
  Copyright (C) 2018 Free Software Foundation, Inc.
  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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  For help, type "help".
  Type "apropos word" to search for commands related to "word"...
  Reading symbols from
/home/wink/prgs/explore-cpp/static-linking/main...(no debugging
symbols found)...done.
  [New LWP 23339]
  Core was generated by `./main'.
  Program terminated with signal SIGSEGV, Segmentation fault.
  #0  0x0000000000382ef6 in _dl_get_origin ()
  (gdb) bt
  #0  0x0000000000382ef6 in _dl_get_origin ()
  #1  0x000000000038255f in _dl_non_dynamic_init ()
  #2  0x000000000037ef41 in __libc_init_first ()
  #3  0x0000000000393d27 in __libc_start_main ()
  #4  0x000000000039368a in _start ()

[1]: https://github.com/winksaville/explore-cpp-static-linking