configure: Add signed-boot openssl configuration support
Change the with-signed-boot option to take the following values:
no - disable signed boot (as before)
gpgme - configure for gpgme, fail if not found
openssl - configure for openssl, fail if not found
yes - look first for gpgme then openssl using first found, fail on none
this should behave as before if gpgme has been installed
fail on any other invalid options
add in the ax_check_openssl.m4 macro to facilitate openssl probing
Signed-off-by: Brett Grandbois <brett.grandbois@opengear.com> Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
projects / petitboot / commit