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Fix Yum Update Postgresql12 to v12.3 Require LLVM-toolset-7-clang >= 4.0.1 Dependency Problem

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Simple running yum update on a CensOS 7 machine which installing the official postgresql v12 will get below problem:

---> Package postgresql12-devel.x86_64 0:12.3-1PGDG.rhel7 will be an update

--> Processing Dependency: llvm-toolset-7-clang >= 4.0.1 for package: postgresql12-devel-12.3-1PGDG.rhel7.x86_64

--> Finished Dependency Resolution

Error: Package: postgresql12-devel-12.3-1PGDG.rhel7.x86_64 (pgdg12)

           Requires: llvm-toolset-7-clang >= 4.0.1

 You could try using --skip-broken to work around the problem

 You could try running: rpm -Va --nofiles --nodigest

You can install CentOS SCLo RH repository and install llvm-toolset-7-clang to resolve it.

yum install centos-release-scl-rh

yum install llvm-toolset-7-clang

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