libstdc%2B%2B/include/Makefile.in

981 pch1_output_builddir = ${host_builddir}/stdc++.h.gch
983 pch1_output_installdir = ${host_installdir}/stdc++.h.gch
984 pch1a_output = ${pch1_output_builddir}/O0g.gch
985 pch1b_output = ${pch1_output_builddir}/O2g.gch
988 pch2_output_builddir = ${host_builddir}/stdtr1c++.h.gch
990 pch2_output_installdir = ${host_installdir}/stdtr1c++.h.gch
991 pch2_output = ${pch2_output_builddir}/O2g.gch
993 pch3_output_builddir = ${host_builddir}/extc++.h.gch
995 pch3_output_installdir = ${host_installdir}/extc++.h.gch
996 pch3_output = ${pch3_output_builddir}/O2g.gch
1433 # Build two precompiled C++ includes, stdc++.h.gch/*.gch
1448 # Build a precompiled TR1 include, stdtr1c++.h.gch/O2.gch
1456 # Build a precompiled extension include, extc++.h.gch/O2.gch