What does rpath link do?

What does rpath link do?

The -rpath-link option may specify a sequence of directory names either by specifying a list of names separated by colons, or by appearing multiple times. The linker uses the following search paths to locate required shared libraries. Any directories specified by -rpath-link options.

What is rpath in GCC?

In computing, rpath designates the run-time search path hard-coded in an executable file or library. Dynamic linking loaders use the rpath to find required libraries. Specifically, it encodes a path to shared libraries into the header of an executable (or another shared library).

What does the GCC linker do?

The GNU Compiler Collection, gcc, can compile programs written in C, C++, Java and several other languages. It provides many useful command line options and syntax extensions, and also serves as a powerful frontend for the GNU linker, ld. Gcc supports a large list of command line options.

How does the linker work with archive files?

The linker handles an archive file by scanning through it for members which define symbols that have so far been referenced but not defined. The only difference between using an -l option and specifying a file name is that -l surrounds library with ‘ lib ‘ and ‘ . a ‘ and searches several directories.

Can RPATH be relative?

The RPATH entries for directories contained within the build tree can be made relative to enable relocatable builds and to help achieve reproducible builds by omitting the build directory from the build environment.

How do I specify an RPATH?

3 Answers

1. use LDFLAGS to specify options for ld.
2. create separate rules for compilation and linking, there you can parr -rpath=/what/ever to ld directly.
3. use -Wl,ldoption for gcc to propagate ldoption to linker. In your case: gcc -Wl,rpath=/what/ever …

What is command LD?

The ld command, also called the linkage editor or binder, combines object files, archives, and import files into one output object file, resolving external references. It produces an executable object file that can be run. By default, the ld command creates and places its output in the a. out file.