+ ${pch1b_output}: ${allstamped} ${host_builddir}/c++config.h ${pch1_source}
+ -mkdir -p ${pch1_output_builddir}
+- $(CXX) $(PCHFLAGS) $(AM_CPPFLAGS) -O2 -g ${pch1_source} -o $@
++ $(CXX) $(PCHFLAGS) $(AM_CPPFLAGS) -O2 ${pch1_source} -o $@
+
+ # Build a precompiled TR1 include, stdtr1c++.h.gch/O2.gch
+ ${pch2_output}: ${pch2_source} ${pch1_output}
+ -mkdir -p ${pch2_output_builddir}
+- $(CXX) $(PCHFLAGS) $(AM_CPPFLAGS) -O2 -g ${pch2_source} -o $@
++ $(CXX) $(PCHFLAGS) $(AM_CPPFLAGS) -O2 ${pch2_source} -o $@
+
+ # Build a precompiled extension include, extc++.h.gch/O2.gch
+ ${pch3_output}: ${pch3_source} ${pch2_output}
+ -mkdir -p ${pch3_output_builddir}
+- $(CXX) $(PCHFLAGS) $(AM_CPPFLAGS) -O2 -g ${pch3_source} -o $@
++ $(CXX) $(PCHFLAGS) $(AM_CPPFLAGS) -O2 ${pch3_source} -o $@
+
+ # The real deal.
+ install-data-local: install-headers
+diff -urNp -x '*.orig' gcc-10.2.0.org/libstdc++-v3/include/Makefile.in gcc-10.2.0/libstdc++-v3/include/Makefile.in
+--- gcc-10.2.0.org/libstdc++-v3/include/Makefile.in 2021-03-21 01:22:56.854335808 +0100
++++ gcc-10.2.0/libstdc++-v3/include/Makefile.in 2021-03-21 01:23:21.861335808 +0100
+@@ -1821,22 +1821,22 @@ ${host_builddir}/gthr-default.h: ${tople
+ # Build two precompiled C++ includes, stdc++.h.gch/*.gch
+ ${pch1a_output}: ${allstamped} ${host_builddir}/c++config.h ${pch1_source}
+ -mkdir -p ${pch1_output_builddir}
+- $(CXX) $(PCHFLAGS) $(AM_CPPFLAGS) -O2 -g -std=gnu++0x ${pch1_source} \
++ $(CXX) $(PCHFLAGS) $(AM_CPPFLAGS) -O2 -std=gnu++0x ${pch1_source} \
+ -o $@
+
+ ${pch1b_output}: ${allstamped} ${host_builddir}/c++config.h ${pch1_source}
+ -mkdir -p ${pch1_output_builddir}
+- $(CXX) $(PCHFLAGS) $(AM_CPPFLAGS) -O2 -g ${pch1_source} -o $@
++ $(CXX) $(PCHFLAGS) $(AM_CPPFLAGS) -O2 ${pch1_source} -o $@