compilation - Compiling a Go program with C Libraries into a Standalone executable -


i'm trying compile go program standalone including c libraries. command i'm using 

[mm17@mm17 grogger]$ go build --ldflags '-extldflags "-static"' ./grogger.go # command-line-arguments /usr/bin/ld: cannot find -lgrok collect2: ld returned 1 exit status /home/mm17/go/pkg/tool/linux_amd64/6l: running gcc failed: unsuccessful exit status 0x100

so i'll modify file calls grok library have following header

  1 package grok   2   3 /*   4 #cgo ldflags: -l /usr/lib/libgrok.so -lgrok   5 #include <grok.h>   6 */   7 import "c"

and running same command gives

[mm17@mm17 grogger]$ go build --ldflags '-extldflags "-static"' ./grogger.go # github.com/blakesmith/go-grok /usr/bin/ld: warning: cannot find entry symbol _start; defaulting 0000000000400180 /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_strlen': ../../blakesmith/go-grok/grok.go:169: undefined reference `strlen' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_patterns_import_from_file': ../../blakesmith/go-grok/grok.go:159: undefined reference `grok_patterns_import_from_file' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_pattern_add': ../../blakesmith/go-grok/grok.go:147: undefined reference `grok_pattern_add' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_new': ../../blakesmith/go-grok/grok.go:132: undefined reference `grok_new' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_match_walk_next': ../../blakesmith/go-grok/grok.go:123: undefined reference `grok_match_walk_next' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_exec': ../../blakesmith/go-grok/grok.go:81: undefined reference `grok_exec' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_discover_new': ../../blakesmith/go-grok/grok.go:68: undefined reference `grok_discover_new' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_compile': ../../blakesmith/go-grok/grok.go:46: undefined reference `grok_compile' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_match_walk_init': ../../blakesmith/go-grok/grok.go:108: undefined reference `grok_match_walk_init' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_match_walk_end': ../../blakesmith/go-grok/grok.go:99: undefined reference `grok_match_walk_end' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_free': ../../blakesmith/go-grok/grok.go:90: undefined reference `grok_free' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_grok_discover': ../../blakesmith/go-grok/grok.go:58: undefined reference `grok_discover' /tmp/go-build731085030/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_free': ../../blakesmith/go-grok/grok.go:34: undefined reference `free' collect2: ld returned 1 exit status

if try build same things:

[mm17@mm17 grogger]$ go build grogger.go # github.com/blakesmith/go-grok /usr/bin/ld: warning: cannot find entry symbol _start; defaulting 0000000000400180 /tmp/go-build294631148/github.com/blakesmith/go-grok/_obj/grok.cgo2.o: in function `_cgo_4244208c3352_cfunc_strlen': ../../blakesmith/go-grok/grok.go:169: undefined reference `strlen' ....

i'm sure i'm doing stupid, can't seem figure out, i'm pretty novice when comes gcc , go, first non toy program.

when compile native library gcc make sure use -fpic option.

if library compiled without -fpic go not able locate functions in it.


Comments

Post a Comment

Popular posts from this blog

php - Submit Form Data without Reloading page -

i know question has been asked , answered bunch of times life of me can not solution work on code. believe if redo code, work properly, , in retrospect time i've spent on issue should have redone code...but beyond deadline , have working prototype up... can advise how update multiple forms on single page without reloading page? horrible @ php , complete noob js/jquery/ajax @ best. html/php in single file , believe causing me problems/is largest obstacle @ getting ajax form processing work. basically, want users to: select teams multiple dropdowns in form group 1 (league champs) , on update update db newly selected team without reloadding page. edit team scores per match , on score submit/update, update db new scores. for each requirement there multiple forms (1 each leagues, 1 each per match) have set class on each form id. everything works via php, form submission reloads page each time submitted , not ideal. i have tried ajax code here http://scotch.io/tutoria
Read more

linux - Rails running on virtual machine in Windows -

the reason why want switch ubuntu people said gems works better on linux on windows. i don't want macbook pro rails development since love windows , cannot stand lack of apps mac. moreover, people saying ubuntu "better" mac: http://www.reddit.com/r/ubuntu/comments/1bgj1s/are_there_advantages_of_ubuntu_over_os_x_for/ does virtual box work enough doesn't have lag @ all? using i7-3517u cpu 8gb memory. need program in environment lag-free , not sluggish. or there alternatives recommend? i unsure permission settings or complicated stuffs regarding terminal. i'll using terminal develop. i'm still quite new here development in linux. please kind me >< thanks. @holyxiaoxin pretty sure should asking on superuser instead. nevertheless, suggest install ubuntu in partition instead of running virtual machine. here's guide https://help.ubuntu.com/community/windowsdualboot also, yes. developing in virtual machine accurate, @ end experiment w
Read more

php - $params->set Array between square bracket -

i'm using k2 in joomla 3.3. i'm trying set params (items ids ) module k2_content item.php file. result must between brackets, like: ["96","68"] my code is: $query = "select * #__k2_items extra_fields_search = '$myautor' , catid !=1 " ; $db->setquery($query); $losautores = $db->loadobjectlist(); $result = array(); foreach ($losautores $key => $value) { $result[] = '" '.$value->id.' "'; } $string_version = implode(',', $result); $autoresfinal = '['.$string_version.']'; if test using print, looks ok. passing var pramas, 1064 error. $params->set('items', $autoresfinal); to test tried $autoresfinal = ["96","68"]; and works fine. idea why doesn't work? thank you. if assign ["x","y"] assigning an array . here transforming array in st
Read more