I am using Fedora 28 with Eclipse Version: Oxygen.3a.
I have already installed the add-on for LLVM-Clang from "Install new software". I am using GCC/G++ 8.1.1.
I built Clang using ninja build system, and it works perfectly fine from command line. I am interested in LibTooling library, so, it serves my purpose. Then, I was trying to setup Eclipse with Clang (mainly for easy debugging), but it Eclipse always gives me linker errors.
I tried 2 solutions:
Followed this thread Unable to install LLVM toolchain for Eclipse CDT. I made a hello world project, and I get the errors:
clang++ -I/home/hassan/Tools/llvm-clang/llvm/include -O0 -emit-llvm -g3 -Wall -c -fmessage-length=0 -std=c++0x -o src/clang_test.bc ../src/clang_test.cpp
clang++ -L/usr/lib/gcc/x86_64-redhat-linux/8/32/ -L/home/hassan/Tools/llvm-clang/build/bin -o clang_test src/clang_test.bc -lstdc++
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/8/32//libstdc++.so when searching for -lstdc++
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/8/32//libstdc++.so when searching for -lstdc++
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/8/32//libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/8/32//libgcc.a when searching for -lgcc
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/8/32//libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/8/32//libgcc.a when searching for -lgcc
I set the include paths/lib paths to my already built (ninja build system) directory. It compiles fine without any problems, but I get linker errors, e.g., llvm::outs() could not be identified.
If anyone can point me in the right direction, that would be great.
Thanks.
Related
I installed Cygwin64 on a win7-64 with gcc dev tools and I just noticed that it produces 64bit binaries. (Well, not that surprising :o) Is there a mean to make it producing some 32bit binaries?
I am compiling the socat tool for windows, compiled in 64bit it is working, but I am trying to make another version suitable for an XP-32.
The configure script does not seem to support a -b 32 switch (that I must have seen for ming64 from this thread, and if I try to specify the -m32 switch in CFLAGS for configure it fails:
$ CFLAGS=-m32 ./configure
checking which defines needed for makedepend...
checking for a BSD-compatible install... /usr/bin/install -c
checking for gcc... gcc
checking whether the C compiler works... no
configure: error: in `/cygdrive/c/dev/tools/nettools/socat/socat-2.0.0-b8':
configure: error: C compiler cannot create executables
See `config.log' for more details
Would the option be to also install Cygwin32, or can I compile 32bit code with another setting or additional cygwin package?
Edit:
I have found that my cygwin64/gcc cannot compile a simple hello.c program in 32bits:
#include <stdio.h>
int main (int argc, char *argv[]){
printf("Hello, world!\n");
return 0;
}
with a gcc -o hello.exe hello.c it works flawlessly, but gcc -o hello.exe hello.c -m32 spits
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2//libgcc_s.dll.a when searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/libgcc_s.dll.a when searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2//libgcc_s.dll.a when searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/libgcc_s.dll.a when searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2//libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2//libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2//libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../libcygwin.a when searching for -lcygwin
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../libcygwin.a when searching for -lcygwin
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../libcygwin.a when searching for -lcygwin
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lcygwin
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: cannot find -ladvapi32
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lshell32
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: cannot find -luser32
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lkernel32
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2//libgcc_s.dll.a when searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/libgcc_s.dll.a when searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2//libgcc_s.dll.a when searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/libgcc_s.dll.a when searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2//libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2//libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2//libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/libgcc.a when searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.9.2/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lgcc
collect2: error: ld returned 1 exit status
configure is part of autotools, and not relevant to the original question. There are two 32 bit runtime environments you can build a C program for. CYGWIN-32 and MINGW32. I will not go into details on the differences, but a cygwin32 program is posix/Linux compatible (mostly), so I prefer that environment. Here are the details on how to make a cygwin32 application on a cygwin64 install:
1)install cygwin32-gcc package and the cygwin32-w32api-runtime package in cygwin64 setup, if you have not already done this. this will install a c compiler i686-pc-cygwin-gcc and the runtime cygwin1.dll that you will need to test your program (or you can test it in a cygwin32 install).
2) assuming your hello.c program above is to be compiled, select the C compiler and runtime, from the cygwin64 shell by using export CC, or just execute the C compiler as the default make output shows below "make hello":
$ export CC=i686-pc-cygwin-gcc
$ make hello
i686-pc-cygwin-gcc hello.c -o hello
$ ./hello
$ *There is no output, program didn't work*
3) you will note that nothing really happens because Cygwin runtime for 32 bit is not in the path. So add it to the path, and it will execute correctly
$ export PATH=/usr/i686-pc-cygwin/sys-root/usr/bin:$PATH
$ ./hello
Hello, world!
$
4) Sit back, have a sip of coffee, and rejoice
Cygwin provides packages containing cygwin-to-cygwin cross toolchains. There are cygwin32-* packages for building 32-bit from 64-bit Cygwin and cygwin64-* packages for building 64-bit from 32-bit Cygwin.
I've never used them, but I assume they work pretty much as any cross toolchain, so you should pass correct --host and --build arguments to your ./configure step.
Adding -m32 to the compiler does not make it select the correct libraries. You should check you have the i686-pc-cygwin-gcc compiler installed. To use that compiler you have to do something like this:
./configure --target=i686-pc-cygwin
Hope it helps :-)
Update December 2022
All other solutions in this thread no longer work !!!
Apparently, Cygwin no longer has packages to install 32-Bit compiler and required libraries!
Legacy "Cygwin32" (setup-x86.exe) can only be installed by passing the following option to the setup program, otherwise the installer terminates immediately with obscure error message:
--allow-unsupported-windows
Also, because the 32-Bit installation packages no longer are available on the "official" mirrors, we must manually use the Cygwin Time Machine mirror at:
http://ctm.crouchingtigerhiddenfruitbat.org/pub/cygwin/circa/2022/11/23/063457
This way we get a working 32-Bit gcc with all required libraries 😏
Note: Cygwin32 can be installed side-by-side with Cygwin64 (in a separate dir) without problem.
I have a very similar issue to the one presented in how to dynamically link to local copy of libc.so.6, libstdc++.so.6 on system with old version of gcc and I followed the answer provided there. To summarize, the issue is that I have code written using C++11 and the cluster sysadmin won't upgrade the gcc compiler to a version which supports C++11. I did a manual install of gcc4.9 in my home directory (using --prefix=$HOME). I compile my code with the following flags:
-I/home/stroberg/include -L/home/stroberg/lib -lc -lstdc++ -llapack -lblas -O3 -std=C++11
I also set
export LD_LIBRARY_PATH=/home/stroberg/lib:$LD_LIBRARY_PATH
The compilation goes fine until it gets to the linking stage, where I get the following errors:
/usr/bin/ld: skipping incompatible /home/stroberg/lib/libstdc++.so when searching for -lstdc++
/usr/bin/ld: skipping incompatible /home/stroberg/lib/libstdc++.a when searching for -lstdc++
/usr/bin/ld: skipping incompatible /home/stroberg/lib/libstdc++.so when searching for -lstdc++
/usr/bin/ld: skipping incompatible /home/stroberg/lib/libstdc++.a when searching for -lstdc++
/usr/bin/ld: skipping incompatible /home/stroberg/lib/libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: skipping incompatible /home/stroberg/lib/libgcc_s.so when searching for -lgcc_s
Any ideas what could be causing the problem? I'm also using the armadillo package (also a local version) is that makes any difference.
Thanks.
I got it working, so I figured I should post what I did. Compiling with
-I$(HOME)/include -L$(HOME)/lib -lblas -llapack -lgsl -lglsblas -O3 -std=c++11
seemed to do the trick. Wish I knew exactly what fixed the problem, but I hope this helps.
I was trying to compile an application for 32 bit target on x86_64 ubuntu 12.04 machine.
I installed the required packages using
sudo apt-get install gcc-multilib g++-multilib libc6-i386 libc6-dev-i386
The first command works generating the 32 bit version. However, the second command errors out
1. g++ -m32 hello.c
2. gcc -m32 hello.c
skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.8/libgcc.a when searching for -lgcc
/usr/bin/ld: cannot find -lgcc
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.8/libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: cannot find -lgcc_s
Could anyone explain to me why gcc fails to work. Am I missing some libraries?
Thanks!
I upgraded my g++ to 4.8 and g++ -m32 stopped working too. Installing g++-4.8-multilib made -m32 option work with both gcc and g++.
I think you need this package of Ubuntu:
sudo apt-get install ia32-libs
Also confirm that you are using gcc multilib with gcc -v. If not set path accordingly or re-install gcc-multilib.
I have a problem: I wrote code using Boost (locks.hpp). My server is running x64 Ubuntu (Linux). When i compile this code with -m64, it builds fine. But when I try to compile for -m32, I get these errors:
g++ -fPIC -m32 -shared -Wl,-soname,test.so -ldl -o test.so test.cpp -lboost_thread
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../libboost_thread.so when searching for -lboost_thread
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../libboost_thread.a when searching for -lboost_thread
/usr/bin/ld: skipping incompatible //usr/lib/libboost_thread.so when searching for -lboost_thread
/usr/bin/ld: skipping incompatible //usr/lib/libboost_thread.a when searching for -lboost_thread
/usr/bin/ld: cannot find -lboost_thread
collect2: ld returned 1 exit status
What am I doing wrong? Thanks!
Try installing the 32-bit boost package:
sudo apt-get install libboost-thread-dev:i386
You need a 32 bit version of the thread library. The answer to your question is already on stackoverflow.com. Use the address-model option when you build boost from source. Boost provides great documentation for building on Linux.
bjam address-model=32
I'm trying to compile x32 LD_PRELOAD on x64 platform(Ubuntu), my command:
g++ -fPIC -m32 -shared -Wl,-soname,test.so -ldl -o test.so test.cpp
But i'm getting error:
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.4.5/libstdc++.so when searching for -lstdc++
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.4.5/libstdc++.a when searching for -lstdc++
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.4.5/libstdc++.so when searching for -lstdc++
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.4.5/libstdc++.a when searching for -lstdc++
/usr/bin/ld: cannot find -lstdc++
collect2: ld returned 1 exit status
How can i fix that?
Thanks!
You need to install 32-bit development packages provided by your distribution. You are seeing this error because you do not have a 32-bit libstdc++ to link against.
Try installing Ubuntu's g++-multilib package.