README says SuiteSparse is in the dependencies. (https://github.com/JuliaLang/julia/blob/v0.6.3/README.md) The ebuild makes use of system SuiteSparse, so >=sci-libs/suitespase-4.1 must be included to DEPEND. If it isn't installed, build fails with "libccolamd.so not found", which is a part of SuiteSparse. (julia-9999 requires more fixes, but I'll send another issue for that possibly after fixing upstream bugs.)
Typo: suitespase->suitesparse
It seems that suitesparse is a metapackage, and only sci-libs/ccolamd is actually needed for a successful compilation.
*** Bug 663428 has been marked as a duplicate of this bug. ***
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=0305602d9b9adc2972985abef559e708ec25cd4b commit 0305602d9b9adc2972985abef559e708ec25cd4b Author: Matthias Maier <tamiko@gentoo.org> AuthorDate: 2018-08-30 02:14:48 +0000 Commit: Matthias Maier <tamiko@gentoo.org> CommitDate: 2018-08-31 02:31:07 +0000 dev-lang/julia: Fix dependencies Closes: https://bugs.gentoo.org/660596 Package-Manager: Portage-2.3.48, Repoman-2.3.10 dev-lang/julia/julia-0.6.3-r1.ebuild | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) Additionally, it has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=341370b1596682a9a74bc621e60831a90c38811a commit 341370b1596682a9a74bc621e60831a90c38811a Author: Matthias Maier <tamiko@gentoo.org> AuthorDate: 2018-08-30 02:13:22 +0000 Commit: Matthias Maier <tamiko@gentoo.org> CommitDate: 2018-08-31 02:30:59 +0000 dev-lang/julia: Update live ebuild Bug: https://bugs.gentoo.org/660596 Package-Manager: Portage-2.3.48, Repoman-2.3.10 dev-lang/julia/julia-9999.ebuild | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)