boost host build fails on Gentoo

Maintainer: @ClaymorePT Environment: OpenWrt master r10127-3209f5ae3d
Description: the host build of boost does not compile on Gentoo
make[2]: Entering directory '/home/stijn/Development/LEDE/openwrt-packages/libs/boost'
Selected Boost API sysv for architecture x86_64 and cpu type " "
. /home/stijn/Development/LEDE/source/include/shell.sh; bzcat /home/stijn/Development/LEDE/source/dl/boost_1_70_0.tar.bz2 | tar -C /home/stijn/Development/LEDE/source/build_dir/hostpkg/boost_1_70_0/.. -xf -
[ ! -d ./src/ ] || cp -fpR ./src/* /home/stijn/Development/LEDE/source/build_dir/hostpkg/boost_1_70_0

Applying ./patches/010-uclibc-ng.patch using plaintext:
patching file boost/asio/detail/impl/eventfd_select_interrupter.ipp

Applying ./patches/100-fix-apply_visitor-on-lvalue-variant.patch using plaintext:
patching file boost/variant/detail/apply_visitor_unary.hpp
patching file libs/variant/test/const_ref_apply_visitor.cpp
Hunk #1 succeeded at 217 (offset -7 lines).
Hunk #2 succeeded at 371 (offset -11 lines).

Applying ./patches/uclibc-ng-2.patch using plaintext:
patching file boost/math/tools/roots.hpp
touch /home/stijn/Development/LEDE/source/build_dir/hostpkg/boost_1_70_0/.prepared3414f67d9cf4e433bcc595300cd62562_6664517399ebbbc92a37c5bb081b5c53
(cd /home/stijn/Development/LEDE/source/build_dir/hostpkg/boost_1_70_0/; if [ -x configure ]; then cp -fpR /home/stijn/Development/LEDE/source/scripts/config.{guess,sub} /home/stijn/Development/LEDE/source/build_dir/hostpkg/boost_1_70_0// && CC="gcc" CFLAGS="-O2 -I/home/stijn/Development/LEDE/source/staging_dir/host/include -I/home/stijn/Development/LEDE/source/staging_dir/hostpkg/include -I/home/stijn/Development/LEDE/source/staging_dir/target-x86_64_musl/host/include" CXX="g++" CPPFLAGS="-I/home/stijn/Development/LEDE/source/staging_dir/host/include -I/home/stijn/Development/LEDE/source/staging_dir/hostpkg/include -I/home/stijn/Development/LEDE/source/staging_dir/target-x86_64_musl/host/include" LDFLAGS="-L/home/stijn/Development/LEDE/source/staging_dir/host/lib -L/home/stijn/Development/LEDE/source/staging_dir/hostpkg/lib -L/home/stijn/Development/LEDE/source/staging_dir/target-x86_64_musl/host/lib" CONFIG_SHELL="/usr/bin/env bash"  bash ./configure --target=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --program-prefix="" --program-suffix="" --prefix=/home/stijn/Development/LEDE/source/staging_dir/hostpkg --exec-prefix=/home/stijn/Development/LEDE/source/staging_dir/hostpkg --sysconfdir=/home/stijn/Development/LEDE/source/staging_dir/hostpkg/etc --localstatedir=/home/stijn/Development/LEDE/source/staging_dir/hostpkg/var --sbindir=/home/stijn/Development/LEDE/source/staging_dir/hostpkg/bin ; fi )
touch /home/stijn/Development/LEDE/source/build_dir/hostpkg/boost_1_70_0/.configured
# b2 does not provide a configure-script nor a Makefile
( cd /home/stijn/Development/LEDE/source/build_dir/hostpkg/boost_1_70_0/tools/build/src/engine ; ./build.sh gcc )
###
### Using 'gcc' toolset.
###
rm -rf bootstrap
mkdir bootstrap
gcc -o bootstrap/jam0 command.c compile.c constants.c debug.c execcmd.c frames.c function.c glob.c hash.c hdrmacro.c headers.c jam.c jambase.c jamgram.c lists.c make.c make1.c object.c option.c output.c parse.c pathsys.c regexp.c rules.c scan.c search.c subst.c timestamp.c variable.c modules.c strings.c filesys.c builtins.c class.c cwd.c native.c md5.c w32_getreg.c modules/set.c modules/path.c modules/regex.c modules/property-set.c modules/sequence.c modules/order.c execunix.c fileunix.c pathunix.c
./bootstrap/jam0 -f build.jam --toolset=gcc --toolset-root= clean
...found 1 target...
...updating 1 target...
...updated 1 target...
./bootstrap/jam0 -f build.jam --toolset=gcc --toolset-root=
...found 160 targets...
...updating 3 targets...
[MKDIR] bin.linuxx86_64
[COMPILE] bin.linuxx86_64/b2
debugger.c: In function 'debug_list_read':
debugger.c:165:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result]
     fscanf( in, "%d", &len );
     ^~~~~~~~~~~~~~~~~~~~~~~~
[COPY] bin.linuxx86_64/bjam
...updated 3 targets...
( cd /home/stijn/Development/LEDE/source/build_dir/hostpkg/boost_1_70_0 ; ./bootstrap.sh --prefix=/home/stijn/Development/LEDE/source/staging_dir/host --with-libraries=headers ; ./b2 install )
Building Boost.Build engine with toolset gcc... tools/build/src/engine/bin.linuxx86_64/b2
Unicode/ICU support for Boost.Regex?... /usr
Generating Boost.Build configuration in project-config.jam for gcc...

Bootstrapping is done. To build, run:

    ./b2

To generate header files, run:

    ./b2 headers

To adjust configuration, edit 'project-config.jam'.
Further information:

   - Command line help:
     ./b2 --help

   - Getting started guide:
     http://www.boost.org/more/getting_started/unix-variants.html

   - Boost.Build documentation:
     http://www.boost.org/build/

/home/build/openwrt/build_dir/hostpkg/boost_1_70_0/tools/build/src/build/feature.jam:491: in feature.validate-value-string from module feature
error: "none" is not a known value of feature <optimization>
error: legal values: "off" "speed" "space"
/home/build/openwrt/build_dir/hostpkg/boost_1_70_0/tools/build/src/build/property.jam:341: in validate1 from module property
/home/build/openwrt/build_dir/hostpkg/boost_1_70_0/tools/build/src/build/property.jam:367: in property.validate from module property
/home/build/openwrt/build_dir/hostpkg/boost_1_70_0/tools/build/src/tools/features/variant-feature.jam:70: in variant from module variant-feature
/usr/share/boost-build/site-config.jam:9: in modules.load from module site-config
/home/build/openwrt/build_dir/hostpkg/boost_1_70_0/tools/build/src/build-system.jam:255: in load-config from module build-system
/home/build/openwrt/build_dir/hostpkg/boost_1_70_0/tools/build/src/build-system.jam:425: in load-configuration-files from module build-system
/home/build/openwrt/build_dir/hostpkg/boost_1_70_0/tools/build/src/build-system.jam:607: in load from module build-system
/home/build/openwrt/build_dir/hostpkg/boost_1_70_0/tools/build/src/kernel/modules.jam:295: in import from module modules
/home/build/openwrt/build_dir/hostpkg/boost_1_70_0/tools/build/src/kernel/bootstrap.jam:139: in boost-build from module
/home/build/openwrt/build_dir/hostpkg/boost_1_70_0/boost-build.jam:17: in module scope from module

make[2]: *** [Makefile:555: /home/stijn/Development/LEDE/source/build_dir/hostpkg/boost_1_70_0/.built] Error 1
make[2]: Leaving directory '/home/stijn/Development/LEDE/openwrt-packages/libs/boost'
time: package/feeds/packages/boost/host-compile#34.41#9.97#44.00
make[1]: *** [package/Makefile:107: package/feeds/packages/boost/host/compile] Error 2
make[1]: Leaving directory '/home/stijn/Development/LEDE/source'
make: *** [/home/stijn/Development/LEDE/source/include/toplevel.mk:218: package/boost/compile] Error 2
Reverting 7c42ddf9ff6215104a749b0b5d271f764f6cf4c7 makes the problem go away.
openwrt / packages

boost host build fails on Gentoo #9152
