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Top Forums Programming Using boost in program created by g++ Post 302749169 by DGPickett on Thursday 27th of December 2012 05:01:00 PM
Old 12-27-2012
Some prefer to do it in two lines, one for .cc.o and one for .o.exe or whatever, so the first also supports code going into libraries, and there is just one place for those options in make definitions.

I usually see the compiler options, -D's, -I's (preprocess is before compile, is before link), the -L right before the -l's it supports, -l's for each linked library and source or local object at the right end. I like to use dynamic linking, so no -L's, just a good LD_LIBRARY_PATH (or whatever your system likes to use, see man ld() for rules).

Sometimes I would -c compile all the .c or .cc into .o and ar them all into one library .a file, as order does not matter within a library, and finally compile with the .a file explicitly only. Only good for one main()! One best practice says put only one subroutine/function in each source file, and then the order is tricky. You can have one .a for each main() and it's "private" functions/methods/subroutines, and then link in any common code libraries.

The -I path must support the entry name or relative path in the source #include's (-I/a/b/c and #include "d/e.h" is for /a/b/c/d/e.h).

Last edited by DGPickett; 12-27-2012 at 06:07 PM..
 

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APR-1-CONFIG(1) 						   User Commands						   APR-1-CONFIG(1)

NAME
apr-1-config - Return metainformation about apr library SYNOPSIS
apr-1-config [OPTION] DESCRIPTION
The apr-1-config program is used to retrieve information about the apr library in the system. It is typically used to compile and link against the library. When linking with libtool, an application should do something like: APR_LIBS="`apr-1-config --link-libtool --libs`" or when linking directly: APR_LIBS="`apr-1-config --link-ld --libs`" An application should use the results of --cflags, --cppflags, --includes, and --ldflags in their build process. OPTIONS
Known values for OPTION are: --prefix[=DIR] change prefix to DIR --bindir print location where binaries are installed --includedir print location where headers are installed --cc print C compiler name --cpp print C preprocessor name and any required options --cflags print C compiler flags --cppflags print C preprocessor flags --includes print include information --ldflags print linker flags --libs print additional libraries to link against --srcdir print APR source directory --installbuilddir print APR build helper directory --link-ld print link switch(es) for linking to APR --link-libtool print the libtool inputs for linking to APR --shlib-path-var print the name of the shared library path env var --apr-la-file print the path to the .la file, if available --apr-so-ext print the extensions of shared objects on this platform --apr-lib-target print the libtool target information --apr-libtool print the path to APR's libtool --version print the APR's version as a dotted triple --help print the help AUTHOR
This manual page was written by Vincent Danjean <Vincent.Danjean@ens-lyon.org> for the Debian project (but may be used by others). apr-1-config 1.2.2 March 2006 APR-1-CONFIG(1)
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