commit:     5f7c4162b1bf2e3b2123cbe4189f675eebcd1a1d
Author:     Sergei Trofimovich <slyfox <AT> gentoo <DOT> org>
AuthorDate: Sat Apr 27 19:42:02 2019 +0000
Commit:     Sergei Trofimovich <slyfox <AT> gentoo <DOT> org>
CommitDate: Sat Apr 27 19:52:08 2019 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=5f7c4162

toolchain.eclass: disable USE=jit for cross-compilers, bug #594572

USE=jit is not very useful for a cross-compiler as it assumes
running generated code on the host. At least avr-* targets
can't build libgccjit.so.

The change disables IUSE=jit for cross-compilers only.
Cross-built compilers could still get libgccjit.so built for a
target.

Reported-by: Maciej Piechotka
Reported-by: Marco Sirabella
Closes: https://bugs.gentoo.org/594572
Signed-off-by: Sergei Trofimovich <slyfox <AT> gentoo.org>

 eclass/toolchain.eclass | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/eclass/toolchain.eclass b/eclass/toolchain.eclass
index be94db869d5..f5daa73233d 100644
--- a/eclass/toolchain.eclass
+++ b/eclass/toolchain.eclass
@@ -2394,6 +2394,10 @@ is_go() {
 
 is_jit() {
        gcc-lang-supported jit || return 1
+       # cross-compiler does not really support jit as it has
+       # to generate code for a target. On target like avr
+       # libgcclit.so can't link at all: bug #594572
+       is_crosscompile && return 1
        use_if_iuse jit
 }
 

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