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lines changed Original file line number Diff line number Diff line change @@ -587,7 +587,21 @@ AC_DEFUN([ACSM_SET_CXX_FLAGS],
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[ clang] , [
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dnl On Darwin with clang + gfortran, we get very many warnings for compact unwinding issues
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dnl We deliberately keep relying on the less performant dwarf unwinding until the over-production of warnings is solved.
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- ACSM_LDFLAGS="-Wl,-keep_dwarf_unwind -Wl,-no_compact_unwind"
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+ OLD_ACSM_LDFLAGS="$ACSM_LDFLAGS"
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+ ACSM_LDFLAGS+=" -Wl,-femit-dwarf-unwind=no_compact_unwind"
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+ AC_LINK_IFELSE ( [ AC_LANG_SOURCE ( [ [
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+ void main(int argc, char **argv)
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+ {
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+ std::cout << "Hello World!" << std::endl;
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+ }
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+ ] ] ) ] ,
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+ [
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+ AC_MSG_RESULT ( <<<Disabling compact unwinding , retaining dwarf unwinding for gfortran compatibility>>> )
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+ ] ,[
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+ dnl Failed to link with new flags, remove them
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+ ACSM_LDFLAGS="$OLD_ACSM_LDFLAGS"
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+ ] )
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+
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ACSM_CXXFLAGS_OPT="$ACSM_CXXFLAGS_OPT -O2 -felide-constructors -Qunused-arguments -Wunused-parameter -Wunused"
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dnl devel flags are added on two lines since there are so many
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