build fails on Debian stable

[Tom M. <tme...@vl...>]

Attempting to configure rsyncrypto 0.14 on Debian 3.1 (Sarge/stable) I see:

   % ./configure
   checking for a BSD-compatible install... /usr/bin/install -c
   checking whether build environment is sane... yes
   checking for gawk... no
   checking for mawk... mawk
   checking whether make sets $(MAKE)... yes
   checking for g++... g++
   checking for C++ compiler default output file name... a.out
   checking whether the C++ compiler works... yes
   checking whether we are cross compiling... no
   checking for suffix of executables...
   checking for suffix of object files... o
   checking whether we are using the GNU C++ compiler... yes
   checking whether g++ accepts -g... yes
   checking for style of include used by make... GNU
   checking dependency style of g++... gcc3
   checking for AES_encrypt in -lcrypto... yes
   checking for arg_parse in -largtable2... no
   configure: error: argtable2 not found
   See `config.log' for more details.

   Some relevant bits from the log:

   configure:2235: g++ -c -g -O2  conftest.cc >&5
   conftest.cc: In function `int main()':
   conftest.cc:15: error: `exit' undeclared (first use this function)
   conftest.cc:15: error: (Each undeclared identifier is reported only
   once for each function it appears in.)
   configure:2241: $? = 1
   configure: failed program was:
   | /* confdefs.h.  */
   |
   | #define PACKAGE_NAME "rsyncrypt"
   | #define PACKAGE_TARNAME "rsyncrypt"
   | #define PACKAGE_VERSION "0.14"
   | #define PACKAGE_STRING "rsyncrypt 0.14"
   | #define PACKAGE_BUGREPORT ""
   | #define PACKAGE "rsyncrypt"
   | #define VERSION "0.14"
   | /* end confdefs.h.  */
   |
   | int
   | main ()
   | {
   | exit (42);
   |   ;
   |   return 0;
   | }
   [...]
   configure:2587: checking for arg_parse in -largtable2
   configure:2617: g++ -o conftest -g -O2   conftest.cc -largtable2
   -lcrypto  >&5
   /usr/bin/ld: cannot find -largtable2
   collect2: ld returned 1 exit status
   configure:2623: $? = 1
   configure: failed program was:
   | /* confdefs.h.  */
   |
   | #define PACKAGE_NAME "rsyncrypt"
   | #define PACKAGE_TARNAME "rsyncrypt"
   | #define PACKAGE_VERSION "0.14"
   | #define PACKAGE_STRING "rsyncrypt 0.14"
   | #define PACKAGE_BUGREPORT ""
   | #define PACKAGE "rsyncrypt"
   | #define VERSION "0.14"
   | #ifdef __cplusplus
   | extern "C" void std::exit (int) throw (); using std::exit;
   | #endif
   | #define HAVE_LIBCRYPTO 1
   | /* end confdefs.h.  */
   |
   | /* Override any gcc2 internal prototype to avoid an error.  */
   | #ifdef __cplusplus
   | extern "C"
   | #endif
   | /* We use char because int might match the return type of a gcc2
   |    builtin and then its argument prototype would still apply.  */
   | char arg_parse ();
   | int
   | main ()
   | {
   | arg_parse ();
   |   ;
   |   return 0;
   | }
   configure:2648: result: no
   configure:2659: error: argtable2 not found
   [...]


I'm not sure about the first failure, but the second is obviously due to 
a missing libargtable2. I searched the Debian package archives for 
packages containing the substring 'argtable', but found nothing in the 
stable distribution. I did find it in unstable:

http://packages.debian.org/unstable/libdevel/libargtable2-dev

   Argtable is an ANSI C library for parsing GNU style command line
   arguments. ... argtable can function as a "getopt_long" replacement,
   without the user of the program noticing the difference. Unlike
   "getopt_long", however, argtable is cross platform, working on all
   Posix systems, as well as Windows and Mac.

Would it be practical to fall back to using getopt_long() if 
libargtable2 isn't available?


I proceeded by installing libargtable2-dev from unstable (which 
fortunately didn't have any dependencies and didn't require a cascading 
upgrade), and then configure succeeded.

rsyncrypto built without error, but a simple test of:

   % ./rsyncrypto --help
   Usage: rsyncrypt <src> <dst> <keys> <publickey file>
   Options:
   -h                   Help - this page
   -d                   Decrypt.
[...]
   Currently only AES encryption is supported
   Segmentation fault

produces a seg fault.

A gdb backtrace shows:

   (gdb) bt
   #0  0x4027b39b in mallopt () from /lib/libc.so.6
   #1  0x4027a15f in free () from /lib/libc.so.6
   #2  0x40020b84 in arg_freetable () from /usr/lib/libargtable2.so.0
   #3  0x0804a60b in __tcf_1 () at rsyncrypto.h:148
   #4  0x40234b62 in exit () from /lib/libc.so.6
   #5  0x4021ee3e in __libc_start_main () from /lib/libc.so.6
   #6  0x08049f21 in _start () at ../sysdeps/i386/elf/start.S:102

I see libargtable2 is near the top of the stack, so perhaps it does have 
a dependency on libc that just isn't documented. Perhaps I'll try 
building it from source.

  -Tom

-- 
Tom Metro
Venture Logic, Newton, MA, USA
"Enterprise solutions through open source."
Professional Profile: https://www.linkedin.com/e/fps/3452158/