CODEWITHSUNDEEP
clinuxautotoolsanjuta
John Smith
John Smith

Reputation: 31

How to get --prefix value passed to Autotools configure script in C code?

I would like to know how can I get the --prefix and the --exec-prefix values passed to the configure script (autotools) in my c source code?

For example if I'm using autotools to build a package in linux I do:

./configure --prefix=/usr/local/apps --exec-prefix=/usr/local/apps &&
make &&
make install

And all the files that the application uses are installed depending on that values.

So in my application for open a file, for example, I need to know that value to know where the images where installed and then open it.

I could hard code that value but I don`t want to do that because I could only install the application there.

How can I know that values?

I'm using Anjuta.

Thanks in advance for your help.

Upvotes: 3

Views: 1569

Answers (1)

William Pursell
William Pursell

Reputation: 212634

The usual thing is to define a value for the preprocessor, either in config.h via AC_DEFINE, or as a flag in AM_CPPFLAGS. For example, in Makefile.am:

AM_CPPFLAGS = -DPREFIX="\"$(prefix)\""

This allows the code to contain things like printf( "prefix = %s\n", PREFIX ) Keep in mind that the value of the string in the source code will not reflect any value of DESTDIR, and so may not work if the user does a staged installation.

Upvotes: 5

Related Questions