Created attachment 500614 [details, diff] patch for lextab.py 2 patches for gcc7.2, successful build here. Possibly backportable for 7.0 upstream link: https://trac.osgeo.org/grass/changeset/71196 First long line of lextab.py has been reindented to match original Second one hasn't.
Created attachment 500616 [details, diff] gcc7 patch for pplexer.py gcc7.x patch for pplexer.py
side note: could be ready for full gcc toolchain upgrade: einfo Portage 2.3.8 (python 3.5.4-final-0, default/linux/amd64/13.0, gcc-7.2.0, glibc-2.26-r2, 4.9.49-gentoo-r1-krnlschd x86_64) ================================================================= System uname: Linux-4.9.49-gentoo-r1-krnlschd-x86_64-Intel-R-_Core-TM-_i3-3217U_CPU_@_1.80GHz-with-gentoo-2.4.1 KiB Mem: 8051012 total, 5383996 free KiB Swap: 8048528 total, 8048528 free Timestamp of repository gentoo: Sun, 29 Oct 2017 02:15:01 +0000 Head commit of repository gentoo: ddb399aee120e98ef400c4e648ade22d01ba8474 sh bash 4.3_p48-r1 ld GNU ld (Gentoo 2.28.1 p1.0) 2.28.1 distcc[18821] (dcc_trace_version) distcc 3.2rc1 x86_64-pc-linux-gnu; built Oct 5 2017 01:06:39 [disabled] ccache version 3.2.4 [disabled] app-shells/bash: 4.3_p48-r1::gentoo dev-java/java-config: 2.2.0-r3::gentoo dev-lang/perl: 5.24.3::gentoo dev-lang/python: 2.7.12::gentoo, 3.4.5::gentoo, 3.5.4::gentoo, 3.6.3::gentoo dev-util/ccache: 3.2.4::gentoo dev-util/cmake: 3.8.2::gentoo dev-util/pkgconfig: 0.29.2::gentoo sys-apps/baselayout: 2.4.1-r2::gentoo sys-apps/openrc: 0.32.1::gentoo sys-apps/sandbox: 2.10-r4::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69::gentoo sys-devel/automake: 1.11.6-r1::gentoo, 1.12.6::gentoo, 1.15-r2::gentoo sys-devel/binutils: 2.29.1-r1::gentoo sys-devel/gcc: 6.4.0::gentoo, 7.2.0::gentoo sys-devel/gcc-config: 1.8-r1::gentoo sys-devel/libtool: 2.4.6-r3::gentoo sys-devel/make: 4.2.1::gentoo sys-kernel/linux-headers: 4.13::gentoo (virtual/os-headers) sys-libs/glibc: 2.26-r2::gentoo
because of glibc-2.26.1-r1 here we have: CFLAGS="${GCC_CPU} ${GCC_OPT_LVL} ${GCC_MLTHRD} ${GCC_LT_LVL} ${GCC_LNKR_PLGN} ${GCC_LT_FT} ${GCC_LT_RPRT} ${GCC_LT_PRTTNS} ${GCC_LT_PRTTN} ${GCC_LT_CMPRS} ${GCC_GRPHT_DNTT} ${GCC_GRPHT_LPS} ${GCC_PP} -I/usr/include/tirpc/" which is also pushed to CXXFLAGS
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