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configure: set WEBP_HAVE_AVX2 when available

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this is used to set WEBP_USE_AVX2 in files where the build flag won't be
used, i.e., dsp/enc.c, which enables VP8EncDspInitAVX2() to be called

Change-Id: I362f4ba39ca40d3e07a081292d5f743c649d9d7f
This commit is contained in:
James Zern
2014-06-03 23:29:23 -07:00
parent a2ac8a420e
commit 230a055501
3 changed files with 16 additions and 6 deletions
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5
configure.ac
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@ -60,6 +60,11 @@ TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wvla])
AC_SUBST([AM_CFLAGS])
TEST_AND_ADD_CFLAGS([AVX2_FLAGS], [-mavx2])
# Assume the presence of any flag is enough. This could be made more robust
# with a header and/or compile check if needed.
AS_IF([test -n "$AVX2_FLAGS"], [
AC_DEFINE(WEBP_HAVE_AVX2, [1],
[Set to 1 if AVX2 is supported])])
AC_SUBST([AVX2_FLAGS])
dnl === CLEAR_LIBVARS([var_pfx])