GCC 5.0 introduced libmpx: https://gcc.gnu.org/wiki/Intel%20MPX%20support%20in%20the%20GCC%20compiler But there's currently no way to enable it with the existing toolchain.eclass. Reproducible: Always Something like this would probably be sufficient to enable it (untested, aside from checking that 'emerge -pv' shows the new use flag): --- a/profile/use.local 2016-03-24 00:37:27.000000000 +0000 +++ b/profile/use.local 2016-03-27 18:49:14.357366533 +0000 @@ -7521,6 +7521,7 @@ sys-devel/gcc:graphite - Add support for the framework for loop optimizations based on a polyhedral intermediate representation sys-devel/gcc:jit - Enable libgccjit so other applications can embed gcc for Just-In-Time compilation. This will slow down the compiler a bit as it forces all of the toolchain to be shared libs. sys-devel/gcc:libssp - Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES) +sys-devel/gcc:mpx - Add compiler support for Intel Memory Protection Extensions (MPX) sys-devel/gcc:mudflap - Add support for mudflap, a pointer use checking library sys-devel/gcc:multislot - Allow for multiple versions to be emerged at once for same CTARGET sys-devel/gcc:nopie - Disable PIE support (NOT FOR GENERAL USE) --- a/eclass/toolchain.eclass 2016-03-27 18:46:05.966708059 +0000 +++ b/eclass/toolchain.eclass 2016-03-27 18:42:31.875886003 +0000 @@ -153,7 +153,7 @@ # the older versions, we don't want to bother supporting it. #448024 tc_version_is_at_least 4.8 && IUSE+=" graphite" IUSE_DEF+=( sanitize ) tc_version_is_at_least 4.9 && IUSE+=" cilk" - tc_version_is_at_least 5.0 && IUSE+=" jit" + tc_version_is_at_least 5.0 && IUSE+=" jit mpx" tc_version_is_at_least 6.0 && IUSE+=" pie +ssp" fi @@ -1161,6 +1161,14 @@ fi fi + if tc_version_is_at_least 5.0 ; then + if in_iuse mpx ; then + confgcc+=( $(use_enable mpx libmpx ) ) + else + confgcc+=( --disable-libmpx ) + fi + fi + if in_iuse cilk ; then confgcc+=( $(use_enable cilk libcilkrts) ) fi
Created attachment 429160 [details, diff] patch to enable support for libmpx My patch above had slightly muddled paths. Attached a fixed one.
Just verified that my patch did make it install the libmpx bits as expected: # qlist gcc | grep mpx | sort /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpx.a /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpx.la /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpx.so /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpx.so.0 /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpx.so.0.0.0 /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpx.spec /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpxwrappers.a /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpxwrappers.la /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpxwrappers.so /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpxwrappers.so.0 /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/32/libmpxwrappers.so.0.0.0 /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpx.a /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpx.la /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpx.so /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpx.so.0 /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpx.so.0.0.0 /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpx.spec /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpxwrappers.a /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpxwrappers.la /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpxwrappers.so /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpxwrappers.so.0 /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libmpxwrappers.so.0.0.0 Patch should be good to go.
should be available now: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=519631a417eb4f8d2ffd4c850a08e82b08ba6696
