• Sean Eskapp (65/65) Mar 18 2011 I'm trying to use DMD through an IDE, but I'm getting stumped trying to
• Jonathan M Davis (8/18) Mar 18 2011 Look at dmd.conf. It includes several flags which are supposed to be pas...
• Sean Eskapp (12/30) Mar 19 2011 Hmm.. after linking with all the options in dmd.conf (-L/usr/lib32 -L/us...
• Jason E. Aten (10/49) Mar 21 2011 I think the reason that ld is skipping those libraries is that secretly,...

Sean Eskapp <eatingstaples gmail.com> writes:

I'm trying to use DMD through an IDE, but I'm getting stumped trying to
create 64-bit executables under Linux. I can get everything compiled fine,
using the -m64 compiler flag, but I can't get it to link. Here's the error
list:

/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../../lib/libphobos2.a when searching for -lphobos2
/usr/bin/ld: skipping incompatible /usr/lib/../lib/libphobos2.a when
searching for -lphobos2
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../libphobos2.a when searching for -lphobos2
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../../lib/libm.so when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../../lib/libm.a when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/../lib/libm.so when searching
for -lm
/usr/bin/ld: skipping incompatible /usr/lib/../lib/libm.a when searching for
-lm
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../libm.so when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../libm.a when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../../lib/libpthread.so when searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../../lib/libpthread.a when searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/../lib/libpthread.so when
searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/../lib/libpthread.a when
searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../libpthread.so when searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../libpthread.a when searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/libgcc.a when searching for -lgcc
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/libgcc.a when searching for -lgcc
/usr/bin/ld: cannot find -lgcc
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../../lib/librt.so when searching for -lrt
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../../lib/librt.a when searching for -lrt
/usr/bin/ld: skipping incompatible /usr/lib/../lib/librt.so when searching
for -lrt
/usr/bin/ld: skipping incompatible /usr/lib/../lib/librt.a when searching
for -lrt
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../librt.so when searching for -lrt
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../librt.a when searching for -lrt
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../../lib/libc.so when searching for -lc
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../../lib/libc.a when searching for -lc
/usr/bin/ld: skipping incompatible /usr/lib/../lib/libc.so when searching
for -lc
/usr/bin/ld: skipping incompatible /usr/lib/../lib/libc.a when searching for
-lc
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../libc.so when searching for -lc
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
gnu/4.4.5/../../../libc.a when searching for -lc
collect2: ld returned 1 exit status

How do I use ld to link 64-bit D executables?

Jonathan M Davis <jmdavisProg gmx.com> writes:

On Friday 18 March 2011 20:49:58 Sean Eskapp wrote:
 incompatible /usr/lib/../lib/librt.so when searching
 for -lrt
 /usr/bin/ld: skipping incompatible /usr/lib/../lib/librt.a when searching
 for -lrt
 /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
 gnu/4.4.5/../../../librt.so when searching for -lrt
 /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
 gnu/4.4.5/../../../librt.a when searching for -lrt
 /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
 gnu/4.4.5/../../../../lib/libc.so

Look at dmd.conf. It includes several flags which are supposed to be passed to 
the linker - either that or you can use dmd to link rather than using gcc on
its 
own. Personally, I wouldn't bother compiling and linking as separate steps, but 
if you do, you need to make sure that you either use the flags in dmd.conf or
you 
link with dmd rather than gcc. For the most part, there's no reason to link
with 
gcc, even if you want to link separately.

- Jonathan M Davis

Sean Eskapp <eatingstaples gmail.com> writes:

== Quote from Jonathan M Davis (jmdavisProg gmx.com)'s article
 On Friday 18 March 2011 20:49:58 Sean Eskapp wrote:
 incompatible /usr/lib/../lib/librt.so when searching
 for -lrt
 /usr/bin/ld: skipping incompatible /usr/lib/../lib/librt.a when searching
 for -lrt
 /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
 gnu/4.4.5/../../../librt.so when searching for -lrt
 /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
 gnu/4.4.5/../../../librt.a when searching for -lrt
 /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
 gnu/4.4.5/../../../../lib/libc.so

 Look at dmd.conf. It includes several flags which are supposed to be passed to
 the linker - either that or you can use dmd to link rather than using gcc on
its
 own. Personally, I wouldn't bother compiling and linking as separate steps, but
 if you do, you need to make sure that you either use the flags in dmd.conf or
you
 link with dmd rather than gcc. For the most part, there's no reason to link
with
 gcc, even if you want to link separately.
 - Jonathan M Davis

Hmm.. after linking with all the options in dmd.conf (-L/usr/lib32 -L/usr/lib64
--no-warn-search-mismatch --export-dynamic -lrt), I still get

/usr/bin/ld: skipping incompatible
/home/me/devl/sfml2/bindings/d/lib/libdsfml-system.a when searching for
-ldsfml-system
/usr/bin/ld: cannot find -ldsfml-system
/usr/bin/ld: skipping incompatible
/home/me/devl/sfml2/bindings/d/lib/libdsfml-graphics.a when searching for
-ldsfml-graphics
/usr/bin/ld: cannot find -ldsfml-graphics
/usr/bin/ld: skipping incompatible
/home/me/devl/sfml2/bindings/d/lib/libdsfml-audio.a when searching for
-ldsfml-audio
/usr/bin/ld: cannot find -ldsfml-audio
/usr/bin/ld: skipping incompatible
/home/me/devl/sfml2/bindings/d/lib/libdsfml-window.a when searching for
-ldsfml-window
/usr/bin/ld: cannot find -ldsfml-window
collect2: ld returned 1 exit status

Now, I compiled libdsfml-system.a myself, and I know they're 64-bit, so this
implies ld still isn't recognizing that I want 64-bit executables.

"Jason E. Aten" <j.e.aten gmail.com> writes:

On Sat, 19 Mar 2011 13:52:05 +0000, Sean Eskapp wrote:

 == Quote from Jonathan M Davis (jmdavisProg gmx.com)'s article
 On Friday 18 March 2011 20:49:58 Sean Eskapp wrote:
 incompatible /usr/lib/../lib/librt.so when searching for -lrt
 /usr/bin/ld: skipping incompatible /usr/lib/../lib/librt.a when
 searching for -lrt
 /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-
 gnu/4.4.5/../../../librt.so when searching for -lrt /usr/bin/ld:
 skipping incompatible /usr/lib/gcc/x86_64-linux-
 gnu/4.4.5/../../../librt.a when searching for -lrt /usr/bin/ld:
 skipping incompatible /usr/lib/gcc/x86_64-linux-
 gnu/4.4.5/../../../../lib/libc.so

 Look at dmd.conf. It includes several flags which are supposed to be
 passed to the linker - either that or you can use dmd to link rather
 than using gcc on its own. Personally, I wouldn't bother compiling and
 linking as separate steps, but if you do, you need to make sure that
 you either use the flags in dmd.conf or you link with dmd rather than
 gcc. For the most part, there's no reason to link with gcc, even if you
 want to link separately. - Jonathan M Davis

 
 Hmm.. after linking with all the options in dmd.conf (-L/usr/lib32
 -L/usr/lib64 --no-warn-search-mismatch --export-dynamic -lrt), I still
 get
 
 /usr/bin/ld: skipping incompatible
 /home/me/devl/sfml2/bindings/d/lib/libdsfml-system.a when searching for
 -ldsfml-system /usr/bin/ld: cannot find -ldsfml-system /usr/bin/ld:
 skipping incompatible
 /home/me/devl/sfml2/bindings/d/lib/libdsfml-graphics.a when searching
 for -ldsfml-graphics /usr/bin/ld: cannot find -ldsfml-graphics
 /usr/bin/ld: skipping incompatible
 /home/me/devl/sfml2/bindings/d/lib/libdsfml-audio.a when searching for
 -ldsfml-audio /usr/bin/ld: cannot find -ldsfml-audio /usr/bin/ld:
 skipping incompatible
 /home/me/devl/sfml2/bindings/d/lib/libdsfml-window.a when searching for
 -ldsfml-window /usr/bin/ld: cannot find -ldsfml-window collect2: ld
 returned 1 exit status
 
 Now, I compiled libdsfml-system.a myself, and I know they're 64-bit, so
 this implies ld still isn't recognizing that I want 64-bit executables.

I think the reason that ld is skipping those libraries is that secretly, 
inside the .a archives, they are really 32-bit libraries and not 64-bit 
libraries.

You can confirm this by using the "ar x {somelibrary}.z" to extract the 
object files (do it from a new temp directory), and then running "file 
{new}.o", which in my hands reports that the dmd libraries such as phobos 
are actually 32-bit, even on x86_64 linux.

This is why I went to LDC2, which is fully 64-bit.

- Jason