How to make use others' C library installed not for the system-wide (Ubuntu/Linux)? Post: 303042977

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Top Forums Programming How to make use others' C library installed not for the system-wide (Ubuntu/Linux)? Post 303042977 by Neo on Wednesday 15th of January 2020 12:04:38 AM

01-15-2020

Administrator

First, I suggest when troubleshooting, you should:

Use the full path name to file, not relative path name. This will insure there are no strange, unseen PATH issues. For example:

Code:

gcc -Wall -O3 -I ./htslib-1.10.2/htslib  -o vcf_parser01 vcf.c  vcf_parser01.c

I would change this to:

Code:

gcc -Wall -O3 -I /FULL/PATH/TO/HERE/htslib-1.10.2/htslib  -o vcf_parser01 vcf.c  vcf_parser01.c

Second, you should confirm that these objects are in the PATH, exactly, and that you have read / access permission for them.

Sometimes, even the best sys admins install code under one userid, then they work as another userid, and they do not have permissions to access the file. Happens all the time (at least to me, LOL).

This is generally the first two steps I always take (back to basics, before back to the future).

Insure your PATH(s) are correct and objects / symbols are in the PATH(s), correctly.
Check file and directly permissions for the userid you are using to build.

UNIX and Linux are funny things, they generally do what they are told to do and report back the "facts" as they find them. In your case, gcc cannot find required symbols and objects. This is generally because they cannot find them, i.e. not in the search PATH or the file/directory permissions are "not as required".

Please post back and let me know if you are certain your PATHs are correct and why, using the FULL PATH names to files and directories in your command line for gcc.

Since we are not "standing behind you, watching you type", we cannot "see" what directory you are in, so to be sure, it is always best to use FULL PATH names when troubleshooting a problem like this.

Thanks.

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LEARN ABOUT X11R4

xft-config

xft-config(1)						      General Commands Manual						     xft-config(1)

NAME

       xft-config - report Xft version, compiler, linker, and/or installation directory information

SYNOPSIS

       xft-config { --exec-prefix[=local_prefix] | --prefix[=local_prefix] | --cflags | --libs } ...

       xft-config --version

DESCRIPTION

       xft-config  reports information of interest to users and developers about the installed version of the X FreeType library, Xft(3).  Depend-
       ing on how it is invoked, xft-config reports the installed version of Xft, the compiler and linker flags that are required to  successfully
       compile	and  link  C  (or C-compatible) code that uses the library, and/or the directories used by the GNU Autotools to install its files.
       Note that if the system's installed version of Xft came from an OS vendor or other third party, the actual location of its files may differ
       from those reported by xft-config.  The system adminstrator can also relocate Xft's files.

       If invoked without any arguments, xft-config will print a usage message on standard error and exit.

OPTIONS

       --cflags
	      Report the compiler flags that are required to compile code that uses Xft symbols.

       --exec-prefix[=local_prefix]
	      If  specified  without the parameter local_prefix, report the file specification prefix that Xft uses for installation of executable
	      files.  If local_prefix is specified, it is used instead of the file specification prefix used for installation of executable  files
	      by  Xft  and  the  value	of  the  option argument specified with --prefix, if any, when compile and linker flags are reported (with
	      --cflags and --libs, respectively).

       --libs Report the linker flags that are required to link code that uses Xft symbols.

       --prefix[=local_prefix]
	      If specified without the parameter local_prefix, report the file specification prefix that Xft uses for installation of  files.	If
	      local_prefix  is	specified,  it is used instead of the file specification prefix used for installation of files by Xft when compile
	      and linker flags are reported (with --cflags and --libs, respectively); also see --exec-prefix.

       --version
	      Report the version of the Xft library installed on the system and exit.

OPERANDS

       xft-config does not recognize any non-option arguments.	At least one option must be specified.

EXIT STATUS

       0      Information was successfully reported.

       1      xft-config was invoked with invalid arguments, or no arguments at all.

AUTHOR

       xft-config was written by Keith Packard.  This manual page was written by Branden Robinson.

SEE ALSO

       Xft(3)

Xft								  Version 2.1.13						     xft-config(1)