Installation on Gentoo Linux about clasp HOT 3 CLOSED

gcc-4.8.3 is no longer masked, issue can be closed.

$ grep KEYWORDS /usr/portage/sys-devel/gcc/gcc-4.8.3.ebuild 
KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 m68k ~mips ppc ppc64 s390 sh sparc x86 ~amd64-fbsd ~x86-fbsd"

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Needs to be reevaluated as per #135

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I can report that I have been able to get this to build on gentoo at 057b30b using llvm 9 and gcc 9.3.0. I did this by following the llvm9 installation instructions and critically leaving out the step to set INCLUDES in wscript. If you set INCLUDES then the system headers for gcc stdlib and friends fight with the llvm headers and everything fails to build. I am seeing runtime errors which might be cause by this, but so far it has been the only way I could get it to build (including doing things like adding -nostdinc++ to CXXFLAGS which simply deferred errors until later in the build process).

Essentially I use wscript.config.debian10 with two additions.
LLVM_CONFIG_BINARY = '/usr/lib/llvm/9/bin/llvm-config' and
BOEHM_GC_ENUMERATE_REACHABLE_OBJECTS_INNER_AVAILABLE = False

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