digitalmars.D.learn - Using static d libs in C++
- Chrono (40/40) Sep 28 2007 Hello!
- Mike Wey (4/62) Sep 29 2007 It looks like gcc is looking for libphobos.a in: /usr/lib/libphobos.a
- Frits van Bommel (5/26) Sep 29 2007 [snip]
Hello!
I'm new to d. And I'd like to use some d functions in my c++ projects by
building them static and linking them.
my platform: dmd and g++ on linux.
import std.stdio;
extern (C) int testproc(int somevar)
{
return (somevar + 1);
}
#include <iostream>
extern "C" int testproc(int somevar);
int main(void)
{
int myvar = 5;
printf("myvar: %d\n", testproc(myvar));
return 0;
}
Compiling them wihout linking.
./dmd -c sub.d
g++ -c main.cpp
everything works fine, I get main.o and sub.o but then
gcc main.o sub.o -o myprogram -m32 -lstdc++ -Xlinker -L./dmd/bin/../lib
-lphobos -lpthread -lm
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/libphobos.a(deh2.o): In
function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable':
internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x9):
undefined reference to `_deh_beg'
internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0xe):
undefined reference to `_deh_beg'
internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x14):
undefined reference to `_deh_end'
internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x37):
undefined reference to `_deh_end'
collect2: ld returned 1 exit status
--- errorlevel 1
any ideas?
Sep 28 2007
Chrono wrote:
Hello!
I'm new to d. And I'd like to use some d functions in my c++ projects by
building them static and linking them.
my platform: dmd and g++ on linux.
import std.stdio;
extern (C) int testproc(int somevar)
{
return (somevar + 1);
}
#include <iostream>
extern "C" int testproc(int somevar);
int main(void)
{
int myvar = 5;
printf("myvar: %d\n", testproc(myvar));
return 0;
}
Compiling them wihout linking.
./dmd -c sub.d
g++ -c main.cpp
everything works fine, I get main.o and sub.o but then
gcc main.o sub.o -o myprogram -m32 -lstdc++ -Xlinker -L./dmd/bin/../lib
-lphobos -lpthread -lm
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/libphobos.a(deh2.o): In
function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable':
internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x9):
undefined reference to `_deh_beg'
internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0xe):
undefined reference to `_deh_beg'
internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x14):
undefined reference to `_deh_end'
internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x37):
undefined reference to `_deh_end'
collect2: ld returned 1 exit status
--- errorlevel 1
any ideas?
It looks like gcc is looking for libphobos.a in: /usr/lib/libphobos.a
while judging from what you use on the command line: -L./dmd/bin/../lib
it's not located there. try specifying the full path.
Sep 29 2007
Hi Mike, thank you for your help. now I tried: gcc main.o sub.o -o myprogram -m32 -lstdc++ -Xlinker -L/root/dmd/lib -lphobos -lpthread -lm /root/dmd that's the original dmd linux package. but same error as before: /root/dmd/lib/libphobos.a(deh2.o): In function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable': internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh21 DHandlerTable+0x9): undefined reference to `_deh_beg' internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh21 DHandlerTable+0xe): undefined reference to `_deh_beg' internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213 HandlerTable+0x14): undefined reference to `_deh_end' internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213 HandlerTable+0x37): undefined reference to `_deh_end' collect2: ld returned 1 exit status
Sep 29 2007
BCS <ao pathlink.com> Reply to Chrono,Hi Mike, thank you for your help. now I tried: gcc main.o sub.o -o myprogram -m32 -lstdc++ -Xlinker -L/root/dmd/lib -lphobos -lpthread -lm /root/dmd that's the original dmd linux package.[...] try: wc /root/dmd/lib/libphobos.a this will fail if the current user cant read the file (as they shouldn't if your not running as root, and if you are running as root, shame on you) If your not sure where to put stuff, I have an install script that works most of the time here http://svn.dsource.org/projects/scrapple/trunk/scripts/dmd_update be warned it will attempt to download dmd.zip from the web, so if that is a problem (either you want a different version or you don't want to burn the bandwidth again) you will want to tweak it. Either way there are a few option at the top you might want to twiddle a bit (it attempt to save off old copies of everything for instance) And I just noticed I might be missing a few things, if you try it, please tell me how well it worked.
Sep 29 2007
Chrono wrote:Hello! I'm new to d. And I'd like to use some d functions in my c++ projects by building them static and linking them. my platform: dmd and g++ on linux.[snip]Compiling them wihout linking. ./dmd -c sub.d g++ -c main.cpp everything works fine, I get main.o and sub.o but then gcc main.o sub.o -o myprogram -m32 -lstdc++ -Xlinker -L./dmd/bin/../lib -lphobos -lpthread -lm /usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/libphobos.a(deh2.o): In function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable': internal/deh2.d:(.gnu.linkonce.t_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x9): undefined reference to `_deh_beg'[snip]any ideas?IIRC those symbols are emitted when DMD sees the main() function. Any chance you could write your main() in D?
Sep 29 2007