Axel Huebl 33b65ecca0 GCC: ISL and mpfr upper bounds (#9513) ... * GCC: constrain version 6, 7, and 8 to build with ISL version at most 0.18 * GCC version 9 (not yet released) will be compatible with ISL version 0.20 so future GCC releases are constrained to build with ISL version at most 0.20 * ISL: Add v0.15, replace all md5 sums with sha256 sums for ISL versions * GCC versions before 6 were constrained to build with ISL 0.14 but have been confirmed to work with ISL 0.15 * GCC: Place an upper bound on GCC's mpfr dependency		2018-10-30 13:26:41 -07:00
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spack	GCC: ISL and mpfr upper bounds (#9513)	2018-10-30 13:26:41 -07:00