support/scripts/check-host-rpath: document existing functions
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>
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@ -39,6 +39,11 @@ is_elf() {
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|grep -E 'Requesting program interpreter:' >/dev/null 2>&1
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}
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# This function tells whether a given ELF executable (first argument)
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# needs a RPATH pointing to the host library directory or not. It
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# needs such an RPATH if at least of the libraries used by the ELF
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# executable is available in the host library directory. This function
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# returns 0 when a RPATH is needed, 1 otherwise.
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elf_needs_rpath() {
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local file="${1}"
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local hostdir="${2}"
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@ -54,6 +59,13 @@ elf_needs_rpath() {
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return 1
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}
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# This function checks whether at least one of the RPATH of the given
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# ELF executable (first argument) properly points to the host library
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# directory (second argument), either through an absolute RPATH or a
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# relative RPATH. Having such a RPATH will make sure the ELF
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# executable will find at runtime the shared libraries it depends
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# on. This function returns 0 when a proper RPATH was found, or 1
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# otherwise.
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check_elf_has_rpath() {
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local file="${1}"
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local hostdir="${2}"
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