I'm on Ubuntu 18.04, GCC 7.4
I created a test shared-library then copy it to /usr/local/lib/
The .so file has been created like this:
gcc -Wall -fPIC -c src/Test.cpp -o obj/Test.o
gcc -shared -Wl,-soname,libhztest.so -o bin/libhztest.so obj/*.o
sudo cp bin/libhztest.so /usr/local/lib/hazeltest/
sudo chmod 777 /usr/local/lib/hazeltest/
Then I created a test app and tried to run it and I get :
error while loading shared libraries: libhztest.so: cannot open shared object file: No such file or directory
If I do export a proper LD_LIBRARY_PATH and it works but I prefer to use ldconfig
Unfortunately ldconfig doesn't seem to link my library even though the directory /usr/local/lib/ is well included in the /etc/ld.so.conf
Anyone could tell me why this doesn't work? Thanks
I finally get it running the command :
sudo ldconfig /usr/local/lib/hazeltest/
You need to copy it into /usr/local/lib/, not /usr/local/lib/hazeltest/. Either that, or add /usr/local/lib/hazeltest/ to /etc/ld.so.conf. (Although I think you're supposed to add this in a new file in /etc/ld.so.conf.d/ instead, like /etc/ld.so.conf.d/hazeltest.conf, so that you don't modify ld.so.conf directly which might be an auto-generated file).
Related
I'm trying to compile and link a program (using CMake) that uses Lua 5.3's C interface on Mac OS X 10.15.7. However I have these problems:
brew install lua#5.3 only installs dynamic libraries
I cannot copy static libraries built from source to /usr/local due to System Integrity Protection (?)
I don't know how to make CMake find the libraries if I put them anywhere else (using find_package(Lua 5.3 REQUIRED)
What's the easiest way to solve this?
If I correctly understand your question, you are trying to use Lua's C API, which means that you need access to the principal header files lua.h, lualib.h, and lauxlib.h, as well the static library liblua.a that is created when the interpreter is built.
I would recommend downloading lua-5.3.5.tar.gz from lua.org and then building from source.
This can be done easily from the Terminal:
$ wget http://www.lua.org/ftp/lua-5.3.5.tar.gz
$ tar xzf lua-5.3.5.tar.gz
$ cd lua-5.3.5
$ make macosx
After that you should be able to do make install as well, which copies the Lua interpreter to /usr/local/bin, I believe.
If you do not want the key Lua header files put into your include path, build your program with -I and -L flags. Also, don't forget the -llua -ldl -lm flags when linking your program.
I installed gcc version 5.1 locally on a cluster having OS as CentOS where I dont have root access (so i cant use any commands like 'sudo'). (The global gcc version installed is 4.4). I also modified the path variable to include the path to my local version at the beginning of the path variable. Before, when I was trying to install boost using the global version, it worked fine. But now, when I try to install boost, it shows the following error:
/users/home/head/cmp/soft/sft/gcc/bin/../libexec/gcc/x86_64-unknown-linux-gnu/5.1.0/cc1: error while loading shared libraries: libisl.so.10: cannot open shared object file: No such file or directory
Any ideas on how to fix this will be highly appreciated.
Follow the instructions at https://gcc.gnu.org/wiki/InstallingGCC
Specifically, don't install ISL manually in some non-standard path, because GCC needs to find its shared libraries at run-time.
The simplest solution is to use the download_prerequisites script to add the GMP, MPFR, MPC and ISL source code to the GCC source tree, which will cause GCC to build them for you automatically, and link to them statically.
I have the same issue. I solved it as follows:
Download the source code of isl available here
Unzip and install: ./configure && make && make install
cp /usr/local/lib/libisl* /usr/lib
Note: a symlink also works:
$ cd /usr/lib
$ ln -s /usr/local/lib/libisl.so.10 libisl.so.10
You can do the same in Debian distros:
apt-get install libisl-dev
Adjust the references of shared libs:
$ cp /usr/local/lib/libisl* /usr/lib
Note: a symlink also works:
$ cd /usr/lib
$ ln -s /usr/local/lib/libisl.so.10 libisl.so.10
I'm reading the following book about operating systems. In Page 43, they use the following command to convert annotated machine code into a raw machine code file:
$ ld -o basic.bin -Ttext 0x0 --oformat binary basic.o
When running that command in my MacBook Pro (running Mavericks), I get:
ld: unknown option: -Ttext
I've did some research and found out that OS X's linker doesn't allow using a script file as the linker script.
Some other posts on the internet recommend using the following "correct" format:
$ ld -T text 0x0 --o format binary -o basic.bin basic.o
Although it didn't work for me neither.
I also tried installing binutils via homebrew, but it doesn't seems to ship with GNU linker.
The command correctly runs in Ubuntu 14.04, but I'd like to continue developing in OS X if possible.
Is there a way to obtain the same results with OS X's linker, potentially with different flags?
UPDATE:
I was able to generate a bin with the following command, using gobjcopy from binutils:
$ gobjcopy -j .text -O binary basic.o basic.bin
However I couldn't find a way to offset label addresses in the code, as I could with GNU ld with -Ttext 0x1000 for example.
I tried with --set-start <hex> without any luck:
$ gobjcopy -j .text --set-start 0x1000 -O binary basic.o basic.bin
I am following the same os-dev.pdf guide and encountered the same problem as you.
The bottom of the issue is that we need to compile a cross-compiled gcc anyway, so the solution is just to do so.
There is a good guide at OSDev but if you're running a recent version of OSX I prepared a specific guide for this on Github
Here are the commands, though please test them before pasting the whole wall of text on your computer! At the Github link you will find the full explanations, but since Stack Overflow seems to like the solution embedded on the answer, here it is.
Also, if you encounter any error, please report it back to me (here or with a Github issue) so that I can fix it for other people.
brew install gmp
brew install mpfr
brew install libmpc
brew install gcc
export CC=/usr/local/bin/gcc-4.9
export LD=/usr/local/bin/gcc-4.9
export PREFIX="/usr/local/i386elfgcc"
export TARGET=i386-elf
export PATH="$PREFIX/bin:$PATH"
mkdir /tmp/src
cd /tmp/src
curl -O http://ftp.gnu.org/gnu/binutils/binutils-2.24.tar.gz # If the link 404's, look for a more recent version
tar xf binutils-2.24.tar.gz
mkdir binutils-build
cd binutils-build
../binutils-2.24/configure --target=$TARGET --enable-interwork --enable-multilib --disable-nls --disable-werror --prefix=$PREFIX 2>&1 | tee configure.log
make all install 2>&1 | tee make.log
cd /tmp/src
curl -O http://mirror.bbln.org/gcc/releases/gcc-4.9.1/gcc-4.9.1.tar.bz2
tar xf gcc-4.9.1.tar.bz2
mkdir gcc-build
cd gcc-build
../gcc-4.9.1/configure --target=$TARGET --prefix="$PREFIX" --disable-nls --disable-libssp --enable-languages=c --without-headers
make all-gcc
make all-target-libgcc
make install-gcc
make install-target-libgcc
You will find GNU's binutils and your cross-compiled gcc at /usr/local/i386elfgcc/bin
manually install binutils always throw errors in my macOS.
The solution is to use homebrew:
brew tap nativeos/i386-elf-toolchain
brew install i386-elf-binutils i386-elf-gcc
then, you can use i386-elf-ld command instead of ld
add --host option of configure file (makefile) ,how to do?
I want to build a library of armv7 and armv7s,but not found host option。
bash
sh-3.2# ./configure.sh --help|grep host
sh-3.2#
http://www.pell.portland.or.us/~orc/Code/discount/discount-2.1.6.tar.bz2
thanks
This project doesn't seem to use classical autotools approach, where you have configure.ac file, that creates configure file.
So execute configure.sh first and then fix CC and AR in the created Makefile:
CC=cc -Wno-return-type -Wno-implicit-int -I.
to something like this:
CC=arm-linux-gcc -Wno-return-type -Wno-implicit-int -I.
Now you can invoke make.
On OS X I'm trying to install the zlib prerequisite for haskell's Cabal. I get this error:
$ sudo ./Setup build
Preprocessing library zlib-0.5.0.0…
ld: library not found for -lgmp
collect2: ld returned 1 exit status
linking dist/build/Codec/Compression/Zlib/Stream_hsc_make.o failed
command was: /usr/bin/gcc -lz -L/sw/lib/ghc-6.8.3/lib/bytestring-0.9.0.1.1 -L/sw/lib/ghc-6.8.3/lib/array-0.1.0.0 -L/sw/lib/ghc-6.8.3/lib/base-3.0.2.0 -L/sw/lib/ghc-6.8.3 -lm -lgmp -ldl dist/build/Codec/Compression/Zlib/Stream_hsc_make.o -o dist/build/Codec/Compression/Zlib/Stream_hsc_make
The library -lgmp is found in /sw/lib, so I can run that command ("/usr/bin/gcc ...") successfully if I manually add -L/sw/lib. The problem is that sudo doesn't know about /sw/lib. Behold:
$ gcc -print-search-dirs | grep sw
libraries: =/lib/i686-apple-darwin9/4.0.1/:/lib/:/usr/lib/i686-apple-darwin9/4.0.1/:/usr/lib/:./i686-apple-darwin9/4.0.1/:./:/sw/lib/i686-apple-darwin9/4.0.1/:/sw/lib/:/usr/lib/gcc/i686-apple-darwin9/4.0.1/:/usr/lib/gcc/i686-apple-darwin9/4.0.1/:/usr/lib/gcc/i686-apple-darwin9/4.0.1/../../../../i686-apple-darwin9/lib/i686-apple-darwin9/4.0.1/:/usr/lib/gcc/i686-apple-darwin9/4.0.1/../../../../i686-apple-darwin9/lib/:/usr/lib/gcc/i686-apple-darwin9/4.0.1/../../../i686-apple-darwin9/4.0.1/:/usr/lib/gcc/i686-apple-darwin9/4.0.1/../../../
$ sudo gcc -print-search-dirs | grep sw
$
How do I tell the sudo version of gcc to look in /sw/lib for libraries? Do I add an environment variable on root's .bash_profile? If so, which one?
UPDATE:
There’s probably a more proper way to do this, but here’s what worked. I created a bash script with this in it:
#!/bin/sh
export LIBRARY_PATH=/sw/lib:$LIBRARY_PATH
./Setup build
And then I ran
$ sudo ./script.sh
That compiled zlib without complaining - hooray! Unfortunately cabal-install is still giving me the error:
$ ./Setup configure
Configuring cabal-install-0.6.2…
Setup: At least the following dependencies are missing:
zlib >=0.4 && <0.6
So I went back to the cabal-install dir (which is what I'm trying to do in the first place), and ran...
$ ./bootstrap.sh
...and that installed everything as expected.
Why you use sudo ever? You should not compile as super user. Compile as normal user and install as super user.
Try setting LDFLAGS=-L/sw/lib.
GHC now comes with an installer for OS X (Leopard, not sure about Tiger). The only issue is that if you use macports or fink, these will probably not see that you have GHC installed and try to install their own version of it.