gistfile1.txt

 simon@odin-linux  ~  equery u gcc:7.2.0
--- Invalid atom in /usr/portage/profiles/releases/17.0/package.mask: =media-gfx/blender-2.78a-r1 cuda
[ Legend : U - final flag setting for installation]
[        : I - package is installed with flag     ]
[ Colors : set, unset                             ]
 * Found these USE flags for sys-devel/gcc-7.2.0:
 U I
 - - cilk            : Support the Cilk Plus language (C/C++ based languages for parallel programming)
 + + cxx             : Build support for C++ (bindings, extra libraries, code generation, ...)
 - - debug           : Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces
 - - doc             : Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
 + + fortran         : Add support for fortran
 - - go              : Build the GCC Go language frontend.
 - - graphite        : Add support for the framework for loop optimizations based on a polyhedral intermediate representation
 - - mpx             : Enable support for Intel Memory Protection Extensions (MPX)
 + + nls             : Add Native Language Support (using gettext - GNU locale utilities)
 + + nptl            : Enable support for Native POSIX Threads Library, the new threading module (requires linux-2.6 or better usually)
 - - objc            : Build support for the Objective C code language
 - - objc++          : Build support for the Objective C++ language
 - - objc-gc         : Build support for the Objective C code language Garbage Collector
 + + openmp          : Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp"
 + + pch             : Enable precompiled header support for faster compilation at the expense of disk space and memory (>=sys-devel/gcc-3.4 only)
 + + pgo             : Build GCC using Profile Guided Optimization (PGO)
 - - pie             : Build programs as Position Independent Executables (a security hardening technique)
 - - regression-test : Run the testsuite and install the results (requires FEATURES=test)
 + + sanitize        : Build support for various sanitizer functions (ASAN/TSAN/etc...)
 + + ssp             : Build packages with stack smashing protector on by default
 - - vanilla         : Do not add extra patches which change default behaviour; DO NOT USE THIS ON A GLOBAL SCALE as the severity of the meaning changes drastically
 + + vtv             : Build support for virtual table verification (a C++ hardening feature)

gistfile2.txt

Calculating dependencies... done!
[ebuild   R   ~] sys-devel/gcc-7.2.0:7.2.0::gentoo  USE="cxx fortran (multilib) nls nptl openmp pch pgo (pie*) sanitize ssp vtv (-altivec) (-awt) -cilk -debug -doc (-fixed-point) (-gcj) -go -graphite (-hardened) (-jit) (-libssp) -mpx -objc -objc++ -objc-gc -regression-test -vanilla" 0 KiB