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fix usage of DISPATCH=1

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- upstream will activate optimization only with -O3 but %{optflags}
set -O2, we patch optflags to use -O3
- DISPATCH=1 seem to be needed on make / make install line call to
obtain an optimized binary, and also get dispatch header installed
in include

Signed-off-by: Bruno Friedmann <bruno@ioda-net.ch>
This commit is contained in:
Bruno Friedmann 2024-09-25 11:49:21 +02:00
parent 679f82e202
commit 6fbc273ac8
1 changed files with 12 additions and 9 deletions
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21
xxhash.spec
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@ -59,30 +59,32 @@ Headers and other development files for xxHash.
%autosetup -p1 -n xxHash-%{version}
%build
# upstream make -O3 mandatory to get performance gain
tmpflags="$(echo %{optflags} | sed 's,-O2,-O3,g')"
# ALLOW_AVX just means "we guarantee we policed our %%optflags".
export CFLAGS="%{optflags} -DXXH_X86DISPATCH_ALLOW_AVX=1"
export CXXFLAGS="$CFLAGS"
export CFLAGS="${tmpflags} -DXXH_X86DISPATCH_ALLOW_AVX=1"
export CXXFLAGS="${CFLAGS}"
export LDFLAGS="%{?build_ldflags}"
# DISPATCH=1 if you want AVX2/AVX512. But it does not seem to perform any
# better than the lowest-denomimation code on at least the 1135G7 and 5950X
# CPUs, and for both LP64 as well as ILP32 — it seems to be all within margin
# of error.
%make_build prefix=%{_prefix} libdir=%{_libdir}
%make_build prefix=%{_prefix} libdir=%{_libdir} DISPATCH=1
%install
export CFLAGS="%{optflags} -DXXH_X86DISPATCH_ALLOW_AVX=1"
export CXXFLAGS="%{optflags}"
export CFLAGS="${tmpflags} -DXXH_X86DISPATCH_ALLOW_AVX=1"
export CXXFLAGS="${CFLAGS}"
export LDFLAGS="%{?build_ldflags}"
%make_install prefix=%{_prefix} libdir=%{_libdir}
%make_install prefix=%{_prefix} libdir=%{_libdir} DISPATCH=1
rm -rf %{buildroot}%{_libdir}/libxxhash.a
%check
export CFLAGS="%{optflags}"
export CXXFLAGS="%{optflags}"
export CFLAGS="${tmpflags}"
export CXXFLAGS="${CFLAGS}"
export LDFLAGS="%{?build_ldflags}"
# not safe for parallel execution as it removes xxhash.o and recreates it with different flags
# the list is taken from test-all with non-working/irrelevant ones (such as ones that change the toolchain) removed
%make_build -j1 test test-unicode listL120 trailingWhitespace test-xxh-nnn-sums
%make_build -j1 DISPATCH=1 test test-unicode listL120 trailingWhitespace test-xxh-nnn-sums
%ldconfig_scriptlets -n libxxhash0
@ -104,6 +106,7 @@ export LDFLAGS="%{?build_ldflags}"
%files devel
%{_includedir}/xxhash.h
%{_includedir}/xxh3.h
%{_includedir}/xxh_x86dispatch.h
%{_libdir}/pkgconfig/libxxhash.pc
%{_libdir}/libxxhash.so