devel/boost-libs fails to build on NetBSD current - amd64 9.99.88

[Paul Goyette <paul%whooppee.com@localhost>]

With pkgsrc up-to-date, I am getting a build error for boost-libs.  All
dependencies have been rebuilt from scratch (starting from an empty
sandbox created by sysutils/mksandbox).

Any clues?

Here's the first error from the log file - the entire log file is
available on request.

...
gcc.compile.c++ bin.v2/libs/serialization/build/gcc-10/release/threading-multi/visibility-hidden/basic_oserializer.o
gcc.compile.c++ bin.v2/libs/serialization/build/gcc-10/release/threading-multi/visibility-hidden/basic_pointer_oserializer.o
gcc.compile.c++ bin.v2/libs/serialization/build/gcc-10/release/threading-multi/visibility-hidden/basic_pointer_iserializer.o
gcc.compile.c++ bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/asinh.o
cc1plus: warning: ./bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/pch.gch: had text segment at different address
cc1plus: error: one or more PCH files were found, but they were invalid
cc1plus: fatal error: bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/pch: No such file or directory
compilation terminated.

    "g++"   -fvisibility-inlines-hidden -fPIC -m64 -pthread -O3 -finline-functions -Wno-inline -Wall -fvisibility=hidden -fvisibility=hidden -Winvalid-pch -DBOOST_ALL_NO_LIB=1 -DBOOST_BUILD_PCH_ENABLED -DBOOST_MATH_TR1_DYN_LINK=1 -DNDEBUG -include"bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/pch" -I"." -I"libs/math/src/tr1"  -c -o "bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/asinh.o" "libs/math/build/../src/tr1/asinh.cpp"

...failed gcc.compile.c++ bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/asinh.o...
gcc.compile.c++ bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/acosh.o
cc1plus: warning: ./bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/pch.gch: had text segment at different address
cc1plus: error: one or more PCH files were found, but they were invalid
cc1plus: fatal error: bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/pch: No such file or directory
compilation terminated.

    "g++"   -fvisibility-inlines-hidden -fPIC -m64 -pthread -O3 -finline-functions -Wno-inline -Wall -fvisibility=hidden -fvisibility=hidden -Winvalid-pch -DBOOST_ALL_NO_LIB=1 -DBOOST_BUILD_PCH_ENABLED -DBOOST_MATH_TR1_DYN_LINK=1 -DNDEBUG -include"bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/pch" -I"." -I"libs/math/src/tr1"  -c -o "bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/acosh.o" "libs/math/build/../src/tr1/acosh.cpp"

...failed gcc.compile.c++ bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/acosh.o...
gcc.link.dll bin.v2/libs/nowide/build/gcc-10/release/threading-multi/visibility-hidden/libboost_nowide.so.1.77.0
gcc.compile.c++ bin.v2/libs/program_options/build/gcc-10/release/threading-multi/visibility-hidden/config_file.o
gcc.compile.c++ bin.v2/libs/serialization/build/gcc-10/release/threading-multi/visibility-hidden/basic_oarchive.o
gcc.link.dll bin.v2/libs/random/build/gcc-10/release/threading-multi/visibility-hidden/libboost_random.so.1.77.0
boost-install.generate-cmake-variant- bin.v2/libs/nowide/build/gcc-10/release/threading-multi/visibility-hidden/libboost_nowide-variant-shared.cmake
common.copy /tmp/pkgs/devel/boost-libs/work.x86_64/boost_1_77_0/stage/lib/libboost_nowide.so.1.77.0
gcc.compile.c++ bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/atanh.o
cc1plus: warning: ./bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/pch.gch: had text segment at different address
cc1plus: error: one or more PCH files were found, but they were invalid
cc1plus: fatal error: bin.v2/libs/math/build/gcc-10/release/threading-multi/visibility-hidden/pch: No such file or directory
compilation terminated.
...

+--------------------+--------------------------+----------------------+
| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:    |
| (Retired)          | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost    |
| Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost  |
|                    |                          | pgoyette99%gmail.com@localhost |
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