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diff -up firefox-66.0/media/libdav1d/moz.build.mozilla-1515641 firefox-66.0/media/libdav1d/moz.build
--- firefox-66.0/media/libdav1d/moz.build.mozilla-1515641 2019-03-12 14:51:09.102398904 +0100
+++ firefox-66.0/media/libdav1d/moz.build 2019-03-12 14:52:12.601193367 +0100
@@ -25,7 +25,7 @@ SOURCES += [
]
# Enable ASM build only on Linux for now.
-if CONFIG['OS_TARGET'] == 'Linux' and (CONFIG['CPU_ARCH'] in ('x86', 'x86_64')):
+if CONFIG['MOZ_DAV1D_ASM']:
# Default stack aligment is 16 bytes
DIRS += ['asm']
diff -up firefox-66.0/toolkit/moz.configure.mozilla-1515641 firefox-66.0/toolkit/moz.configure
--- firefox-66.0/toolkit/moz.configure.mozilla-1515641 2019-03-12 14:51:09.101398907 +0100
+++ firefox-66.0/toolkit/moz.configure 2019-03-12 14:51:09.103398901 +0100
@@ -437,6 +437,16 @@ def av1(value, target, c_compiler):
if enabled:
return True
+@depends(target, nasm_version, when=av1 & compile_environment)
+def dav1d_asm(target, nasm_version):
+ if target.os == 'GNU' and target.kernel == 'Linux' and target.cpu in ('x86', 'x86_64'):
+ if nasm_version < '2.13':
+ die('nasm 2.13 or greater is required for AV1 support. '
+ 'Either install nasm or add --disable-av1 to your configure options.')
+ return True
+
+
+set_config('MOZ_DAV1D_ASM', dav1d_asm)
set_config('MOZ_AV1', av1)
set_define('MOZ_AV1', av1)
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