configure.ac: add -fvisibility=hidden if supported
commit7310d0bd5b04ea270a6630efa759d3ecf2622b28
authorH. Peter Anvin <hpa@linux.intel.com>
Wed, 30 May 2018 18:48:00 +0000 (30 11:48 -0700)
committerH. Peter Anvin <hpa@linux.intel.com>
Wed, 30 May 2018 18:48:00 +0000 (30 11:48 -0700)
tree0786e9575a7457cefb340e1371d05ec79b1c46e6
parent740ec3572bb4a587a287cdcea201f12fa5f00501
configure.ac: add -fvisibility=hidden if supported

None of our symbols are available for a dynamic library, and if they
were, there would be no point in allowing them to be overridden. This
optimizes code generation for global symbols.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
configure.ac