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Top Forums Programming How to make use others' C library installed not for the system-wide (Ubuntu/Linux)? Post 303043006 by yifangt on Wednesday 15th of January 2020 05:28:11 PM
Old 01-15-2020
Come to ld_config now

The compiling worked after:
Code:
$ LIBROOT="/home/yifangt/Study/C/VCF/htslib-1.10.2"
$ gcc -Wall -O3 -o vcf_parser01 vcf_parser01.c vcf.c  -I ${LIBROOT}/htslib -I ${LIBROOT} -L ${LIBROOT}  -lhts
$ ./vcf_parser01: error while loading shared libraries: libhts.so.3: cannot open shared object file: No such file or directory
$ ldd ./vcf_parser01
    linux-vdso.so.1 (0x00007ffdde13d000)
    libhts.so.3 => not found
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fa2c16bd000)
    /lib64/ld-linux-x86-64.so.2 (0x00007fa2c1cb0000)

It seems I'm getting closer to the point now. The shared library libhts.so.3 is located in ${LIBROOT}.
I did not mean to be lazy without digging the ld_config(?) or related subjects, but simply to stay consistent with this same example to avoid confusion.
How to ensure the dynamic library is available for the new executable vcf_parser01 just compiled?

Thanks!

Last edited by yifangt; 01-15-2020 at 06:40 PM.. Reason: adding now info
 

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PLDD(1)                                                          Linux User Manual                                                         PLDD(1)

NAME
pldd - display dynamic shared objects linked into a process SYNOPSIS
pldd pid pldd option DESCRIPTION
The pldd command displays a list of the dynamic shared objects that are linked into the process with the specified process ID. The list includes the libraries that have been dynamically loaded using dlopen(3). OPTIONS
-?, --help Display program help message. --usage Display a short usage message. -V, --version Display the program version. EXIT STATUS
On success, pldd exits with the status 0. If the specified process does not exist, the user does not have permission to access its dynamic shared object list, or no command-line arguments are supplied, pldd exists with a status of 1. If given an invalid option, it exits with the status 64. VERSIONS
pldd is available since glibc 2.15. CONFORMING TO
The pldd command is not specified by POSIX.1. Some other systems have a similar command. NOTES
The command lsof -p PID also shows output that includes the dynamic shared objects that are linked into a process. The gdb(1) info shared command also shows the shared libraries being used by a process, so that one can obtain similar output to pldd using a command such as the following (to monitor the process with the specified pid): $ gdb -ex "set confirm off" -ex "set height 0" -ex "info shared" -ex "quit" -p $pid | grep '^0x.*0x' BUGS
Since glibc 2.19, pldd is broken: it just hangs when executed. It is unclear if it will ever be fixed. EXAMPLE
$ echo $$ # Display PID of shell 1143 $ pldd $$ # Display DSOs linked into the shell 1143: /usr/bin/bash linux-vdso.so.1 /lib64/libtinfo.so.5 /lib64/libdl.so.2 /lib64/libc.so.6 /lib64/ld-linux-x86-64.so.2 /lib64/libnss_files.so.2 SEE ALSO
ldd(1), lsof(1), dlopen(3), ld.so(8) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU 2017-09-15 PLDD(1)
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