curl-library

From: Michael Schultz via curl-library <curl-library_at_cool.haxx.se> Date: Thu, 14 Mar 2019 19:44:52 +0000 · > ld: 0711-317 ERROR: Undefined symbol: .pthread_mutex_lock

-- 
  / daniel.haxx.se
===
Daniel,
<< If you look a little further down (and I suggest you read the configure.ac file and not configure) you'll see that it also *restores* CFLAGS again to the former value if doing that -pthread attempt wasn't successful.>>
Well, I think that the issue is that the -pthread attempt was successful, but only because the build of the test program included -lpthread on its command line. Unfortunately, that wasn't made part of the libraries later.
I believe that part of the issue is that the -pthread makes no sense to xlc, at least to the version that I have.  I think that it is the source to the warning "/opt/IBM/xlc/13.1.0/bin/.orig/xlc: 1501-210 (W) command option t contains an incorrect subargument". I think that it is interesting that this warning appears twice in the link of curl, and there are two -pthread on that command line, one near the beginning and one at the very end.
libtool: link: xlc -O2 -pthread -o curl curl-slist_wc.o curl-tool_binmode.o curl-tool_bname.o curl-tool_cb_dbg.o curl-tool_cb_hdr.o curl-tool_cb_prg.o curl-tool_cb_rea.o curl-tool_cb_see.o curl-tool_cb_wrt.o curl-tool_cfgable.o curl-tool_convert.o curl-tool_dirhie.o curl-tool_doswin.o curl-tool_easysrc.o curl-tool_filetime.o curl-tool_formparse.o curl-tool_getparam.o curl-tool_getpass.o curl-tool_help.o curl-tool_helpers.o curl-tool_homedir.o curl-tool_hugehelp.o curl-tool_libinfo.o curl-tool_main.o curl-tool_metalink.o curl-tool_msgs.o curl-tool_operate.o curl-tool_operhlp.o curl-tool_panykey.o curl-tool_paramhlp.o curl-tool_parsecfg.o curl-tool_strdup.o curl-tool_setopt.o curl-tool_sleep.o curl-tool_urlglob.o curl-tool_util.o curl-tool_vms.o curl-tool_writeout.o curl-tool_xattr.o ../lib/curl-strtoofft.o ../lib/curl-nonblock.o ../lib/curl-warnless.o ../lib/curl-curl_ctype.o  -L/usr/local/openssl-1.1.1a/lib ../lib/.libs/libcurl.a -lssl -lcrypto -pthread
I'm just wondering if the final -pthread is supposed to be something like -lpthread and the initial -pthread needs to be -qthread, or something like that.
Mike S
=====
Daniel,
Here is the context diff to the configure file:
*** configure.org       Thu Mar 14 19:07:49 2019
--- configure   Thu Mar 14 19:03:55 2019
***************
*** 40582,40594 ****
        *-hp-hpux*)
                    USE_THREADS_POSIX=""
           ;;
        *)
           ;;
        esac
              if test "$USE_THREADS_POSIX" != "1"
        then
-         CFLAGS="$CFLAGS -pthread"
          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_create in -lpthread" >&5
  $as_echo_n "checking for pthread_create in -lpthread... " >&6; }
  if ${ac_cv_lib_pthread_pthread_create+:} false; then :
--- 40582,40596 ----
        *-hp-hpux*)
                    USE_THREADS_POSIX=""
           ;;
+       *-ibm-aix*)
+          ;;
        *)
+         CFLAGS="$CFLAGS -pthread"
           ;;
        esac
              if test "$USE_THREADS_POSIX" != "1"
        then
          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_create in -lpthread" >&5
  $as_echo_n "checking for pthread_create in -lpthread... " >&6; }
  if ${ac_cv_lib_pthread_pthread_create+:} false; then :
***************
*** 40618,40624 ****
  fi
  rm -f core conftest.err conftest.$ac_objext \
      conftest$ac_exeext conftest.$ac_ext
- LIBS=$ac_check_lib_save_LIBS
  fi
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pthread_pthread_create" >&5
  $as_echo "$ac_cv_lib_pthread_pthread_create" >&6; }
--- 40620,40625 ----
***************
*** 40626,40631 ****
--- 40627,40633 ----
    USE_THREADS_POSIX=1
  else
     CFLAGS="$save_CFLAGS"
+    LIBS=$ac_check_lib_save_LIBS
  fi
        fi
I can also send this context diff to you as an attachment.
This allowed the source to compile. Most of the tests passed. 1435 and 1436 failed, but I'll submit a separate email for those.
Mike S
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RE: Problem building curl 7.64.0 on AIX 7.2 using xlc 13.1.0