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support/scripts/check-host-rpath: document existing functions

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As suggested by Arnout Vandecappelle, let's document the
elf_needs_rpath() and check_elf_has_rpath() functions, before we make
them a bit more complicated with per-package directory support.

Suggested-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni 2018-12-28 11:43:28 +01:00 committed by Peter Korsgaard
parent 6ab50c141d
commit b1e294cc15
1 changed files with 12 additions and 0 deletions
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support/scripts/check-host-rpath
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@ -39,6 +39,11 @@ is_elf() {
|grep -E 'Requesting program interpreter:' >/dev/null 2>&1
}
# This function tells whether a given ELF executable (first argument)
# needs a RPATH pointing to the host library directory or not. It
# needs such an RPATH if at least of the libraries used by the ELF
# executable is available in the host library directory. This function
# returns 0 when a RPATH is needed, 1 otherwise.
elf_needs_rpath() {
local file="${1}"
local hostdir="${2}"
@ -54,6 +59,13 @@ elf_needs_rpath() {
return 1
}
# This function checks whether at least one of the RPATH of the given
# ELF executable (first argument) properly points to the host library
# directory (second argument), either through an absolute RPATH or a
# relative RPATH. Having such a RPATH will make sure the ELF
# executable will find at runtime the shared libraries it depends
# on. This function returns 0 when a proper RPATH was found, or 1
# otherwise.
check_elf_has_rpath() {
local file="${1}"
local hostdir="${2}"