I have tried that,

so now my test programs have this source code:

extern "C" {

#include <curl/curl.h>
#include <curl/easy.h>

}

int main
(int argc, char* argv[])
{
        curl_global_init(CURL_GLOBAL_ALL);
}

but
even so, I get the same error messages:
- the one linked to the default-
compiled libcurl compiles but gives the error when launched for missing
dll;
- the one linked to the static-compiled libcurl doesn't compile
and gives the compile-time error for the missing implementations of
some ldap routines:

Z:
\data\users\marco_pappalepore\data\projects\repository1\tests\libcurl\test_libcurl_client_static>g++
test_libcurl_client_static.cpp -
DCURL_STATICLIB -o
test_libcurl_client_static_gpp.exe -I../../../../external/libcurl/curl-
7.27.0-static/include -L../../../../external/
libcurl/curl-7.27.0-
static/lib/.libs -lcurl -L../../../../external/libcurl/curl-7.27.0-
static/lib/.deps -lwsock32
../../../../external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0x221):
undefined reference to `_i
mp__ldap_err2stringA'
../../../..
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x262): undefined reference to `_i

mp__ldap_msgfree'
../../../../external/libcurl/curl-7.27.0-static/lib/.
libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0x28e): undefined
reference to `_i
mp__ldap_unbind_s'
../../../../external/libcurl/curl-
7.27.0-static/lib/.libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.
text+0x636): undefined reference to `_i
mp__ldap_set_optionA'
../../..
/../external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x659): undefined reference to `_i

mp__ldap_sslinitA'
../../../../external/libcurl/curl-7.27.0-static/lib/.
libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0x6b9): undefined
reference to `_i
mp__ldap_simple_bind_sA'
../../../..
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x70a): undefined reference to `_i

mp__ldap_search_sA'
../../../../external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0x727):
undefined reference to `_i
mp__ldap_err2stringA'
../../../..
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x7ae): undefined reference to `_i

mp__ldap_err2stringA'
../../../../external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0x80d):
undefined reference to `_i
mp__ldap_set_optionA'
../../../..
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x828): undefined reference to `_i

mp__ldap_initA'
../../../../external/libcurl/curl-7.27.0-static/lib/.
libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0x85c): undefined
reference to `_i
mp__ldap_first_entry'
../../../..
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x896): undefined reference to `_i

mp__ldap_get_dnA'
../../../../external/libcurl/curl-7.27.0-static/lib/.
libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0x92b): undefined
reference to `_i
mp__ldap_first_attributeA'
../../../..
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x952): undefined reference to `_i

mp__ldap_get_values_lenA'
../../../../external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0xb20):
undefined reference to `_i
mp__ldap_value_free_len'
../../../..
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0xb6d): undefined reference to `_i

mp__ldap_memfreeA'
../../../../external/libcurl/curl-7.27.0-static/lib/.
libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0xb87): undefined
reference to `_i
mp__ldap_next_attributeA'
../../../..
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0xb9e): undefined reference to `_i

mp__ldap_memfreeA'
../../../../external/libcurl/curl-7.27.0-static/lib/.
libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0xbb6): undefined
reference to `_i
mp__ber_free'
../../../../external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0xbc9):
undefined reference to `_i
mp__ldap_next_entry'
../../../..
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0xbee): undefined reference to `_i

mp__ldap_value_free_len'
../../../../external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0xbfa):
undefined reference to `_i
mp__ldap_memfreeA'
../../../..
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0xc06): undefined reference to `_i

mp__ldap_memfreeA'
../../../../external/libcurl/curl-7.27.0-static/lib/.
libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0xc22): undefined
reference to `_i
mp__ber_free'

So the problem persists.

           
what else can be done ?

Many thanks,

                 Marco

----
Messaggio originale----
Da: driansharp_at_gmail.com
Data: 08/09/2012 2.07
A: "crillion_at_tiscali.it"<crillion_at_tiscali.it>, "libcurl development"
<curl-library_at_cool.haxx.se>
Ogg: Re: cannot link libcurl statically
Hi
You need to use 
Extern "C" {.....}
Around all header includes that 
reference any library that was written in c to properly link against a 
c++ program
Best wishes
Ian Sharp PhD
On Sep 7, 2012, at 7:33 AM, 
"crillion_at_tiscali.it" <crillion_at_tiscali.it> wrote:
> Hi,
> 
>    I'm 
trying to use libcurl on windows vista (32) with mingw, 
> linking it 
statically to C++ programs. The problem I get is that I 
> cannot link 
my client program, or when I'm able to link it, it doesn't 
> work 
anyway(it requires the dll). I've already read many similar 
> requests 
for static linkage problems with curl, and I think have 
> applied the 
related suggestions, but the problem persists.
> 
> I have 
> 
synthesized my problem in 2 cases, one with curl-7.27.0 compiled in 
the 
> default way, and the other with curl-7.27.0 compiled with 
static 
> options. In each of the cases I have a .bat script compiling 
the 
> program and a simple C++ program using curl.
> 
> What I really 
need is to 
> be able to link curl statically, so I ask if you can 
explain me where 
> I'm doing wrong and how can actually get my program 
compiling.
> 
> Here 
> are my 2 cases:
> 
> 
========================================
> 
> 
------------------------------
> case 1: default curl compile
> 
> 
------------------------------
> 
> - get curl-7.27.0.
> - extract it 
into a 
> folder, such as
> (...)\data\projects\external\libcurl\curl-
7.27.0-
> default
> - open mingw shell
> - go the folder
> (...)
> 
\data\projects\external\libcurl\curl-7.27.0-default
> - give the 
command
> .
> /configure
> (wait till the command ends)
> - give the 
command
> make
> (wait 
> till the command ends)
> - create then a c++ 
program, such this file:
> 
> (...)
> 
\data\projects\repository1\tests\libcurl\test_libcurl_client_default\test_libcurl_client_default.
> cpp
> 
> here's the c++ program source code:
> 
> #include <curl/curl.
h>
> 
> #include <curl/easy.h>
> 
> int main(int argc, char* argv[])
> 
{
>    
> curl_global_init(CURL_GLOBAL_ALL);
> }
> 
> - create the .bat 
file to compile 
> the program:
> (...)
> 
\data\projects\repository1\tests\libcurl\test_libcurl_client_default\compile_test_libcurl_client_default_gpp.
> bat
> 
> here's the .bat source code:
> 
> g++ 
test_libcurl_client_default.cpp -
> o test_libcurl_client_default_gpp.
exe -I../../../..
> /external/libcurl/curl-7.27.0-default/include -L..
/../../..
> /external/libcurl/curl-7.27.0-default/lib/.libs -lcurl -L..
/../../..
> /external/libcurl/curl-7.27.0-default/lib/.deps -lwsock32 
> 
> 
> - now 
> close mingw shell and start using normal windows 
command prompt
> - from 
> the windows command prompt, run the .bat to 
build the program. the 
> build process works and I get the output:
> 
> Z:
> 
\data\users\marco_pappalepore\data\projects\repository1\tests\libcurl\test_libcurl_client_default>g++ 
> test_libcurl_client_default.cpp
> -o test_libcurl_client_default_gpp.
exe 
> -I../../../../external/libcurl/curl-7.27.0-default/include -L..
/../../..
> /external/libcurl/curl-
> 7.27.0-default/lib/.libs -lcurl -
L../../../..
> /external/libcurl/curl-7.27.0-default/lib/.deps -
lwsock32
> 
> - now the 
> generated program, 
test_libcurl_client_default_gpp.exe exists and can 
> be launched via 
the command
> test_libcurl_client_default_gpp
> 
> - this 
> gives the 
error:
> 
> "test_libcurl_client_default_gpp.exe - unable to 
> locate 
component"
> "This application has failed to start because libcurl-
> 4.
dll was not found. Re-installing the application may fix this 
> 
problem."
> 
> - I don't want to use dlls, I need to produce a single 
file 
> executable, so anyway this option cannot be done.
> 
> 
> 
========================================
> 
------------------------------
> 
> case 2: static curl compile
> 
------------------------------
> 
> - get curl-
> 7.27.0.
> - extract 
it into a folder, such as
> (...)
> 
\data\projects\external\libcurl\curl-7.27.0-static
> - open mingw shell
> - 
> go the folder
> (...)\data\projects\external\libcurl\curl-7.27.0-
static
> - 
> give the command
> ./configure --enable-static --disable-
shared --with-
> ssl
> (wait till the command ends)
> - give the 
command
> make LDFLAGS=-all-
> static
> (wait till the command ends)
> 
- create then a c++ program, such 
> this file:
> (...)
> 
\data\projects\repository1\tests\libcurl\test_libcurl_client_static\test_libcurl_client_static.
> cpp
> 
> here's the c++ program source code:
> 
> #include <curl/curl.
h>
> 
> #include <curl/easy.h>
> 
> int main(int argc, char* argv[])
> 
{
>    
> curl_global_init(CURL_GLOBAL_ALL);
> }
> 
> - create the .bat 
file to compile 
> the program:
> (...)
> 
\data\projects\repository1\tests\libcurl\test_libcurl_client_static\compile_test_libcurl_client_static_gpp.
> bat
> 
> here's the .bat source code:
> 
> g++ 
test_libcurl_client_static.cpp -
> DCURL_STATICLIB -o 
test_libcurl_client_static_gpp.exe -I../../../..
> 
/external/libcurl/curl-7.27.0-static/include -L../../../..
> 
/external/libcurl/curl-7.27.0-static/lib/.libs -lcurl -L../../../..
> 
/external/libcurl/curl-7.27.0-static/lib/.deps -lwsock32
> 
> - now 
close 
> mingw shell and start using normal windows command prompt
> - 
from the 
> windows command prompt, run the .bat to build the program. 
Now I get 
> the following output with error messages:
> 
> 
> 
> g++ 
> test_libcurl_client_static.cpp -DCURL_STATICLIB -o 
> 
test_libcurl_client_static_gpp.exe -I../../../../external/libcurl/curl-
> 7.27.0-static/include -L../../../../external/libcurl/curl-7.27.0-
> 
static/lib/.libs -lcurl -L../../../../external/libcurl/curl-7.27.0-
> 
static/lib/.deps -lwsock32
> 
> ../../../../external/libcurl/curl-
7.27.0-
> static/lib/.libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.
text+0x221): 
> undefined reference to `_i
> mp__ldap_err2stringA'
> ..
/../../..
> /external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a
(libcurl_la-
> ldap.o):ldap.c:(.text+0x262): undefined reference to `_i
> 
> mp__ldap_msgfree'
> ../../../../external/libcurl/curl-7.27.0-
static/lib/.
> libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0x28e): 
undefined 
> reference to `_i
> mp__ldap_unbind_s'
> ../../../..
/external/libcurl/curl-
> 7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.
> text+0x636): undefined reference to `_i
> 
mp__ldap_set_optionA'
> ../../..
> /../external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-
> ldap.o):ldap.c:(.text+0x659): 
undefined reference to `_i
> 
> mp__ldap_sslinitA'
> ../../../..
/external/libcurl/curl-7.27.0-static/lib/.
> libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x6b9): undefined 
> reference to `_i
> 
mp__ldap_simple_bind_sA'
> ../../../..
> /external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-
> ldap.o):ldap.c:(.text+0x70a): 
undefined reference to `_i
> 
> mp__ldap_search_sA'
> ../../../..
/external/libcurl/curl-7.27.0-
> static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x727): 
> undefined reference to `_i
> 
mp__ldap_err2stringA'
> ../../../..
> /external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-
> ldap.o):ldap.c:(.text+0x7ae): 
undefined reference to `_i
> 
> mp__ldap_err2stringA'
> ../../../..
/external/libcurl/curl-7.27.0-
> static/lib/.libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x80d): 
> undefined reference to `_i
> 
mp__ldap_set_optionA'
> ../../../..
> /external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-
> ldap.o):ldap.c:(.text+0x828): 
undefined reference to `_i
> 
> mp__ldap_initA'
> ../../../..
/external/libcurl/curl-7.27.0-static/lib/.
> libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x85c): undefined 
> reference to `_i
> 
mp__ldap_first_entry'
> ../../../..
> /external/libcurl/curl-7.27.0-
static/lib/.libs/libcurl.a(libcurl_la-
> ldap.o):ldap.c:(.text+0x896): 
undefined reference to `_i
> 
> mp__ldap_get_dnA'
> ../../../..
/external/libcurl/curl-7.27.0-static/lib/.
> libs/libcurl.a(libcurl_la-
ldap.o):ldap.c:(.text+0x92b): undefined 
> reference to `_i
> 
mp__ldap_first_attributeA'
> ../../../..
> /external/libcurl/curl-
7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
> ldap.o):ldap.c:(.
text+0x952): undefined reference to `_i
> 
> mp__ldap_get_values_lenA'
> ../../../../external/libcurl/curl-7.27.0-
> static/lib/.libs/libcurl.a
(libcurl_la-ldap.o):ldap.c:(.text+0xb20): 
> undefined reference to `_i
> mp__ldap_value_free_len'
> ../../../..
> /external/libcurl/curl-
7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
> ldap.o):ldap.c:(.
text+0xb6d): undefined reference to `_i
> 
> mp__ldap_memfreeA'
> ../..
/../../external/libcurl/curl-7.27.0-static/lib/.
> libs/libcurl.a
(libcurl_la-ldap.o):ldap.c:(.text+0xb87): undefined 
> reference to `_i
> mp__ldap_next_attributeA'
> ../../../..
> /external/libcurl/curl-
7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
> ldap.o):ldap.c:(.
text+0xb9e): undefined reference to `_i
> 
> mp__ldap_memfreeA'
> ../..
/../../external/libcurl/curl-7.27.0-static/lib/.
> libs/libcurl.a
(libcurl_la-ldap.o):ldap.c:(.text+0xbb6): undefined 
> reference to `_i
> mp__ber_free'
> ../../../../external/libcurl/curl-7.27.0-
> 
static/lib/.libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0xbc9): 
> 
undefined reference to `_i
> mp__ldap_next_entry'
> ../../../..
> 
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
> 
ldap.o):ldap.c:(.text+0xbee): undefined reference to `_i
> 
> 
mp__ldap_value_free_len'
> ../../../../external/libcurl/curl-7.27.0-
> 
static/lib/.libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0xbfa): 
> 
undefined reference to `_i
> mp__ldap_memfreeA'
> ../../../..
> 
/external/libcurl/curl-7.27.0-static/lib/.libs/libcurl.a(libcurl_la-
> 
ldap.o):ldap.c:(.text+0xc06): undefined reference to `_i
> 
> 
mp__ldap_memfreeA'
> ../../../../external/libcurl/curl-7.27.0-
static/lib/.
> libs/libcurl.a(libcurl_la-ldap.o):ldap.c:(.text+0xc22): 
undefined 
> reference to `_i
> mp__ber_free'
> collect2: ld returned 1 
exit status
> 
> 
> - 
> It seems that the compiler is searching some 
"ldap" library that I 
> don't think I have on windows vista/mingw. I 
had already been able to 
> reduce some of these errors by linking also 
wsock32 with the option -
> lwsock32;
> anyway it seems that this ldap 
library is not present on my 
> system. 
> 
> So:
> 
> what other steps 
am I supposed to do in order to make 
> the build process work, and the 
program run without the need of any dll 
> ?
> 
> Many thanks,
> 
>            Marco
> 
> 
> 
> 
> Invita i tuoi amici e Tiscali ti 
premia! Il consiglio di un amico vale più di uno spot in TV. Per ogni 
nuovo abbonato 30 € di premio per te e per lui! Un amico al mese e 
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> 
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