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undefined reference to `curl_global_init'

From: Hello! hello <prosp4300_at_gmail.com>
Date: Sat, 11 Feb 2012 02:04:43 +0800

Hi,

I encounter a problem while compile attached sourcecode which require
libcurl

From following log generated by ld, libcurl.so was loaded, definition of
'curl_global_init' was also there,
but the compiler still complain without any success

Thanks for any help

Package for libcurl:
libcurl4-openssl-dev

Compile Command:
gcc -L/usr/lib/i386-linux-gnu -lcurl -Wl,-M,-t,-y,curl_global_init
couch_example1.c

Log:

/usr/bin/ld: mode elf_i386
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crt1.o
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crti.o
/usr/lib/gcc/i686-linux-gnu/4.6.1/crtbegin.o
-lcurl (/usr/lib/i386-linux-gnu/libcurl.so)
/tmp/ccT5ZAF5.o
-lgcc_s (/usr/lib/gcc/i686-linux-gnu/4.6.1/libgcc_s.so)
/lib/i386-linux-gnu/libc.so.6
Archive member included because of file (symbol)

/usr/lib/i386-linux-gnu/libc_nonshared.a(elf-init.oS)

/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crt1.o
(__libc_csu_init)
(/usr/lib/i386-linux-gnu/libc_nonshared.a)elf-init.oS
/usr/lib/i386-linux-gnu/libc_nonshared.a(stat.oS)
                              /tmp/ccT5ZAF5.o (stat)
(/usr/lib/i386-linux-gnu/libc_nonshared.a)stat.oS
/lib/i386-linux-gnu/ld-linux.so.2
-lgcc_s (/usr/lib/gcc/i686-linux-gnu/4.6.1/libgcc_s.so)
/usr/lib/gcc/i686-linux-gnu/4.6.1/crtend.o
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crtn.o

Allocating common symbols
Common symbol size file

fp 0x4 /tmp/ccT5ZAF5.o
curl 0x4 /tmp/ccT5ZAF5.o
file_info 0x58 /tmp/ccT5ZAF5.o

Discarded input sections

 .note.GNU-stack
                0x0000000000000000 0x0
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crt1.o
 .gnu_debuglink
                0x0000000000000000 0xc
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crt1.o
 .note.GNU-stack
                0x0000000000000000 0x0
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crti.o
 .gnu_debuglink
                0x0000000000000000 0xc
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crti.o
 .note.GNU-stack
                0x0000000000000000 0x0
/usr/lib/gcc/i686-linux-gnu/4.6.1/crtbegin.o
 .note.GNU-stack
                0x0000000000000000 0x0 /tmp/ccT5ZAF5.o
 .group 0x0000000000000000 0x8
/usr/lib/i386-linux-gnu/libc_nonshared.a(elf-init.oS)
 .note.GNU-stack
                0x0000000000000000 0x0
/usr/lib/i386-linux-gnu/libc_nonshared.a(elf-init.oS)
 .group 0x0000000000000000 0x8
/usr/lib/i386-linux-gnu/libc_nonshared.a(stat.oS)
 .text.__i686.get_pc_thunk.bx
                0x0000000000000000 0x4
/usr/lib/i386-linux-gnu/libc_nonshared.a(stat.oS)
 .note.GNU-stack
                0x0000000000000000 0x0
/usr/lib/i386-linux-gnu/libc_nonshared.a(stat.oS)
 .note.GNU-stack
                0x0000000000000000 0x0
/usr/lib/gcc/i686-linux-gnu/4.6.1/crtend.o
 .note.GNU-stack
                0x0000000000000000 0x0
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crtn.o
 .gnu_debuglink
                0x0000000000000000 0xc
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crtn.o

Memory Configuration

Name Origin Length Attributes
*default* 0x0000000000000000 0xffffffffffffffff

Linker script and memory map

LOAD /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crt1.o
LOAD /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crti.o
LOAD /usr/lib/gcc/i686-linux-gnu/4.6.1/crtbegin.o
LOAD /usr/lib/i386-linux-gnu/libcurl.so
LOAD /tmp/ccT5ZAF5.o
LOAD /usr/lib/gcc/i686-linux-gnu/4.6.1/libgcc.a
LOAD /usr/lib/gcc/i686-linux-gnu/4.6.1/libgcc_s.so
LOAD /usr/lib/i386-linux-gnu/libc.so
START GROUP
LOAD /lib/i386-linux-gnu/libc.so.6
LOAD /usr/lib/i386-linux-gnu/libc_nonshared.a
LOAD /lib/i386-linux-gnu/ld-linux.so.2
END GROUP
LOAD /usr/lib/gcc/i686-linux-gnu/4.6.1/libgcc.a
LOAD /usr/lib/gcc/i686-linux-gnu/4.6.1/libgcc_s.so
LOAD /usr/lib/gcc/i686-linux-gnu/4.6.1/crtend.o
LOAD /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/crtn.o
 ...
.gnu.attributes
 *(.gnu.attributes)

/DISCARD/
 *(.note.GNU-stack)
 *(.gnu_debuglink)
 *(.gnu.lto_*)
OUTPUT(a.out elf32-i386/usr/lib/i386-linux-gnu/libcurl.so: definition of
curl_global_init
/tmp/ccT5ZAF5.o: reference to curl_global_init
/tmp/ccT5ZAF5.o: In function `main':
couch_example1.c:(.text+0xa0): undefined reference to `curl_global_init'
couch_example1.c:(.text+0xd5): undefined reference to `curl_easy_init'
couch_example1.c:(.text+0x10c): undefined reference to `curl_easy_setopt'
couch_example1.c:(.text+0x131): undefined reference to `curl_easy_setopt'
couch_example1.c:(.text+0x158): undefined reference to `curl_easy_setopt'
couch_example1.c:(.text+0x17f): undefined reference to `curl_easy_setopt'
couch_example1.c:(.text+0x19b): undefined reference to `curl_slist_append'
couch_example1.c:(.text+0x1c4): undefined reference to `curl_easy_setopt'
couch_example1.c:(.text+0x1d1): undefined reference to `curl_easy_perform'
couch_example1.c:(.text+0x1dd): undefined reference to `curl_slist_free_all'
couch_example1.c:(.text+0x1ea): undefined reference to `curl_easy_cleanup'
couch_example1.c:(.text+0x1fc): undefined reference to `curl_global_cleanup'
/usr/bin/ld: link errors found, deleting executable `a.out'
collect2: ld returned 1 exit status
)

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Received on 2012-02-10