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Tom Tromey authored
This patch adds a few improvements to how the build system finds LLVM's FileCheck program. * On Fedora, the system LLVM installs FileCheck in the "llvm" subdirectory of the LLVM libdir. This patch teaches the build system to look there. * This adds a configure option to specify which llvm-config executable to use. This is handy on systems that can parallel install multiple versions of LLVM; for example I can now: ./configure --llvm-config=/bin/llvm-config-5.0-64 ... to build against LLVM 5, rather than whatever the default llvm-config might be. * Finally, this adds a configure- and config.toml- option to set the path to FileCheck. This is handy when building against an LLVM where FileCheck was not installed. This happens on compatibility installs of LLVM on Fedora.
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