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Do not use -Ofast #10267

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cce7e6a
Do not use -Ofast
fwyzard Jan 11, 2026
70c5c86
Do not use -Ofast
fwyzard Jan 11, 2026
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36 changes: 24 additions & 12 deletions scram-tools.file/tools/gcc/ofast-flag.xml
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Original file line number Diff line number Diff line change
@@ -1,12 +1,24 @@
<tool name="ofast-flag" version="1.0" revision="1">
<flags CXXFLAGS="-Ofast -fno-reciprocal-math"/>
<ifarch match="ppc64le|amd64|x86_64">
<flags CXXFLAGS="-mrecip=none"/>
</ifarch>
<ifarchitecture name="slc6_">
<ifcompiler name="llvm">
<flags CXXFLAGS="-fno-builtin"/>
</ifcompiler>
</ifarchitecture>
<flags NO_RECURSIVE_EXPORT="1"/>
</tool>
<tool name="ofast-flag" version="2.0" revision="1">
<!--
As of GCC version 13.3.0, `-Ofast` enables (directly or indirectly):
- `-fallow-store-data-races`
- `-fno-semantic-interposition`
- `-fno-math-errno`
- `-funsafe-math-optimizations`
- `-ffinite-math-only`
- `-fno-rounding-math` (enabled by default)
- `-fno-signaling-nans` (enabled by default)
- `-fcx-limited-range`
- `-fexcess-precision=fast`
- `-fno-signed-zeros`
- `-fno-trapping-math`
- `-fassociative-math`
- `-freciprocal-math` (disabled in cms-sw/cmsdist#8280)
We disable `-fallow-store-data-races`, `-funsafe-math-optimizations`, `-ffinite-math-only` and `-freciprocal-math` (see cms-sw/cmsdist#8280).
-->
<flags CXXFLAGS="-fno-semantic-interposition -fno-math-errno -fno-rounding-math -fno-signaling-nans -fexcess-precision=fast -fno-signed-zeros -fno-trapping-math -fassociative-math -fno-reciprocal-math"/>
<ifarch match="ppc64le|amd64|x86_64">
<flags CXXFLAGS="-mrecip=none"/>
</ifarch>
<flags NO_RECURSIVE_EXPORT="1"/>
</tool>
2 changes: 1 addition & 1 deletion xz-bootstrap.spec
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ Source0: http://tukaani.org/xz/xz-%{realversion}.tar.gz
%setup -n xz-%{realversion}

%build
./configure CFLAGS='-fPIC -D_FILE_OFFSET_BITS=64 -Ofast' --prefix=%{i} --disable-static
./configure CFLAGS='-fPIC -D_FILE_OFFSET_BITS=64 -O3' --prefix=%{i} --disable-static
make %{makeprocesses}

%install
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2 changes: 1 addition & 1 deletion xz.spec
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Expand Up @@ -7,7 +7,7 @@ BuildRequires: autotools
%setup -n %{n}-%{realversion}

%build
./configure CFLAGS='-fPIC -Ofast' --prefix=%{i} --disable-static --disable-nls --disable-rpath --disable-dependency-tracking --disable-doc
./configure CFLAGS='-fPIC -O3' --prefix=%{i} --disable-static --disable-nls --disable-rpath --disable-dependency-tracking --disable-doc
make %{makeprocesses}

%install
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