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Top Forums UNIX for Beginners Questions & Answers Makefiles Post 302988633 by alltaken on Friday 30th of December 2016 05:28:48 AM
Old 12-30-2016
Makefiles

hi,

Quote:
what (external) libraries , include files , header files are to be included depends on respective project as above variable is not default/special variable.
Ofcourse, abc, sprd, cpd are variables. That is already understood.

EXPLIB_SUBDIRS :

EXP = Export
LIB = Libraries
SUBDIRS = Sub-directories to be searched for the libraries.

What I am unable to understand is what is getting "exported" ? Importing libs or includes, for a second, makes sense. One might need to link the program and the libraries and for that purpose, the libs and include files could be imported from the same directory or the sub-directories.

Thanks.

---------- Post updated at 03:58 PM ---------- Previous update was at 03:37 PM ----------

Hi All,

Answering my own question:

The concept of export is related to Sandboxing and backing tree. Export is a directory in which all the required libraries and include files from the original source are copied into. So, by EXPLIB_SUBDIRS = abc def, it is meant that copy the required libs from the sub-directories abc, def to the EXPORT directory for linking.
This way only the required libs are imported in the EXPORT directory.

Please improve the answer or let me know if there is some gap in my understanding.

Thanks for your answers.
This User Gave Thanks to alltaken For This Post:
 

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PCRE-CONFIG(1)						      General Commands Manual						    PCRE-CONFIG(1)

NAME
pcre-config - program to return PCRE configuration SYNOPSIS
pcre-config [--prefix] [--exec-prefix] [--version] [--libs] [--libs16] [--libs32] [--libs-cpp] [--libs-posix] [--cflags] [--cflags-posix] DESCRIPTION
pcre-config returns the configuration of the installed PCRE libraries and the options required to compile a program to use them. Some of the options apply only to the 8-bit, or 16-bit, or 32-bit libraries, respectively, and are not available if only one of those libraries has been built. If an unavailable option is encountered, the "usage" information is output. OPTIONS
--prefix Writes the directory prefix used in the PCRE installation for architecture independent files (/usr on many systems, /usr/local on some systems) to the standard output. --exec-prefix Writes the directory prefix used in the PCRE installation for architecture dependent files (normally the same as --prefix) to the standard output. --version Writes the version number of the installed PCRE libraries to the standard output. --libs Writes to the standard output the command line options required to link with the 8-bit PCRE library (-lpcre on many systems). --libs16 Writes to the standard output the command line options required to link with the 16-bit PCRE library (-lpcre16 on many systems). --libs32 Writes to the standard output the command line options required to link with the 32-bit PCRE library (-lpcre32 on many systems). --libs-cpp Writes to the standard output the command line options required to link with PCRE's C++ wrapper library (-lpcrecpp -lpcre on many systems). --libs-posix Writes to the standard output the command line options required to link with PCRE's POSIX API wrapper library (-lpcreposix -lpcre on many systems). --cflags Writes to the standard output the command line options required to compile files that use PCRE (this may include some -I options, but is blank on many systems). --cflags-posix Writes to the standard output the command line options required to compile files that use PCRE's POSIX API wrapper library (this may include some -I options, but is blank on many systems). SEE ALSO
pcre(3) AUTHOR
This manual page was originally written by Mark Baker for the Debian GNU/Linux system. It has been subsequently revised as a generic PCRE man page. REVISION
Last updated: 24 June 2012 PCRE 8.30 01 January 2012 PCRE-CONFIG(1)
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