Re: ? 4GL compile/link w/ .so (using gcc)

In article <34F4A63C.8E10E763@wholefoods.com>, John Bitsche <john.bitsche@wholefoods.com> writes >Greetings from the Heart of Texas (Austin): > >We are trying to compile/link some 4GL programs using shared objects, >but have hit a brick wall and we are hoping someone might suggest how we >can get around it. Situation detailed below... > >Many thanks, > >John Bitsche >Programmer/Analyst >Whole Foods Market >Austin, Texas > >>Date: Wed, 25 Feb 1998 15:50:06 -0600 >> From: Steve >> To: John > > >######## Specific Questions ########### >Why are functions in a shared object library not being found by ld, even >when the error messages clearly indicate that the shared object >libraries were found as were the function references therein? > >We suspect that the .so files may not have been created correctly, but >are not sure how to test this theory and pinpoint the specific problem. > >What is the standard cc/ld command combination to create .so files? > There isn;t one, it is OS specific. >The .so file $INFORMIXDIR/lib/tools gets linked in correctly by ld. None >of its functions are in the unresolved list. > It is compeletly self contained and does NOT call shared functions OUTSIDE the .so file. >######### Background and Details ############# >Machine info: >SunOS wfmris 5.6 Generic sun4u sparc SUNW,Ultra-Enterprise > >Informix info: >INFORMIX-4GL Version 6.05.UD1 >DB-Access Version 7.24.UC2 > >GNU compiler > >Contents of /usr/fourgen/lib (where the subject shared object files are >located): >prog_ctl.so report.so scr.so standard.so stubs.so user_ctl.so > >Produced by: >cc -fwritable-strings -fPIC ... >ld -G ... > >Characteristics of the subject shared library files: >prog_ctl.so: ELF 32-bit MSB dynamic lib SPARC Version 1, dynamically >linked, not stripped >report.so: ELF 32-bit MSB dynamic lib SPARC Version 1, dynamically >linked, not stripped >scr.so: ELF 32-bit MSB dynamic lib SPARC Version 1, dynamically >linked, not stripped >standard.so: ELF 32-bit MSB dynamic lib SPARC Version 1, dynamically >linked, not stripped >stubs.so: ELF 32-bit MSB dynamic lib SPARC Version 1, dynamically >linked, not stripped >user_ctl.so: ELF 32-bit MSB dynamic lib SPARC Version 1, dynamically >linked, not stripped > >c4gl command executed: >c4gl -shared account.o bnkrec.o branch.o browse.o chkstk.o detail.o >fg_funcs.o fg_rcond.o fg_rconh.o globals.o header.o main.o midlevel.o >reconz.o ../libcod.a ../lib2cod.a ../libwfm.a >/usr3/fourgen/lib/prog_ctl.so /usr3/fourgen/lib/scr.so >/usr3/fourgen/lib/user_ctl.so /usr3/fourgen/lib/standard.so >/usr3/fourgen/lib/c_lib.a /usr3/fourgen/lib/stubs.so -s -o i_bankr.4ge > ld checks from STRICTLY from left to right when looking for functions. Hence /usr3/fourgen/lib/standard.so must only call functions in /usr3/fourgen/lib/c_lib.a /usr3/fourgen/lib/stubs.so Try listing the shared libraries twice on the command line. >resultant gcc command executed: >cc -fwritable-strings -fPIC -I/usr3/informix7.2/incl/tools >-I/usr3/informix7.2/incl/esql account.o bnkrec.o branch.o browse.o >chkstk.o detail.o fg_funcs.o fg_rcond.o fg_rconh.o globals.o header.o >main.o midlevel.o reconz.o ../libcod.a ../lib2cod.a ../libwfm.a >/usr3/fourgen/lib/prog_ctl.so /usr3/fourgen/lib/scr.so >/usr3/fourgen/lib/user_ctl.so /usr3/fourgen/lib/standard.so >/usr3/fourgen/lib/c_lib.a /usr3/fourgen/lib/stubs.so -s -o i_bankr.4ge >-L/usr3/informix7.2/lib/tools -l4gsh605 >/usr3/informix7.2/lib/tools/netlib.a -lnsl -lsocket -lm -ltermlib > >Resultant error messages: >Unable to link i_bankr.4ge. Error message: >-o 2 Undefined first referenced > symbol in file >menu_next /usr3/fourgen/lib/prog_ctl.so >logstart main.o >textedit /usr3/fourgen/lib/user_ctl.so >menu_display /usr3/fourgen/lib/prog_ctl.so >variabletext_prompt /usr3/fourgen/lib/scr.so >textpick account.o >menu_mark /usr3/fourgen/lib/prog_ctl.so >menu_help /usr3/fourgen/lib/prog_ctl.so >lib_message account.o >langtrans_strtonative account.o >lib_delkey /usr3/fourgen/lib/scr.so >warnync chkstk.o >lib_chkkey /usr3/fourgen/lib/scr.so >textput account.o >put_vararg account.o >event_prc /usr3/fourgen/lib/user_ctl.so >num_vararg bnkrec.o >wait_on /usr3/fourgen/lib/user_ctl.so >lib_newkey /usr3/fourgen/lib/scr.so >set_fldtab account.o >lib_getkey /usr3/fourgen/lib/scr.so >put_scrlib account.o >fg_username ../lib2cod.a(security.o) >oscommand_run /usr3/fourgen/lib/scr.so >ring_clear fg_rconh.o >table_exist /usr3/fourgen/lib/standard.so >fg_error ../lib2cod.a(key_edit.o) >eror_menu /usr3/fourgen/lib/user_ctl.so >fg_help /usr3/fourgen/lib/scr.so >menu_open /usr3/fourgen/lib/prog_ctl.so >variabletext_error /usr3/fourgen/lib/scr.so >textview /usr3/fourgen/lib/user_ctl.so >menu_light /usr3/fourgen/lib/prog_ctl.so >please_wait /usr3/fourgen/lib/scr.so >menuhelp ../lib2cod.a(key_pick.o) >message_window /usr3/fourgen/lib/user_ctl.so >warnyn fg_rcond.o >langjoin ../libcod.a(zledcls.o) >menu_set /usr3/fourgen/lib/prog_ctl.so >... >ld: fatal: Symbol referencing errors. No output written to i_bankr.4ge >Occurred while compiling >in /usr3/fourgen/accounting/all.4gm/i_bankr.wfm > >All unresolved symbols reported by ld are in the .so files listed in the >error message. > >Environment: > >PATH=.:/usr3/fourgen/bin:/usr/bin:/usr/sbin:/bin:/sbin:/usr/ccs/bin:/opt/GCC2723>/bin:/usr3/informix7.2/bin:/usr3/fourgen/bin:/usr/local/bin:/usr/bin:/etc: > >DBNAME=standard >DBSRC=/usr3/fourgen/lib/report.RDS:/usr3/fourgen/lib/standard.RDS:/usr3/fourgen/ >lib/stubs.RDS:/usr3/fourgen/accounting/libcod.RDS > >shared_libs=Y >company=wfm_test >fg=/usr3/fourgen >SHELL=/bin/ksh >INFORMIXDIR=/usr3/informix7.2>TERM=vt220 >PWD=/usr3/fourgen/Make > > > -- David Williams Maintainer of the Informix FAQ Primary site (Beta Version) http://www.smooth1.demon.co.uk Official site http://www.iiug.org/techinfo/faq/faq_top.html I see you standin', Standin' on your own, It's such a lonely place for you, For@@N