tree 0c056c01a63652e89e9702c3516de3e54e79a452
parent 9f59323c1225454aecf7748739e9fcaba88cc753
author George Steed <george.steed@arm.com> 1707320127 +0000
committer James Zern <jzern@google.com> 1707772916 +0000

cpu.cmake: Fix AArch64 compiler flag tests

The existing check_c_compiler_flag test uses a regex internally to match
against common error message strings in stderr from the compiler,
however this does not match the "invalid feature modifier" error that is
emitted by certain versions of GCC. This leads to the feature being
incorrectly enabled only to then fail to compile the library later.

To get around this, use the aom_check_source_compiles helper routine to
compile a trivial program with the flag instead since this does not
suffer the same problems and correctly identifies the features as being
not available.

Bug: aomedia:3543
Change-Id: I072281b2d3e986ee859ff8268bfad7a0fce3fd4c