ghc-toolchain: Failing on Centos7
Exited with code 1
found whether Cc supports --target: Cc {ccProgram = Program { prgPath = "/usr/bin/gcc" , prgFlags = [] }}
checking whether Cc works...
Entering: checking whether Cc works
Execute: /usr/bin/gcc -c -o /tmp/tmp0/test.o /tmp/tmp0/test.o.c
found whether Cc works: ()
checking for C99 support...
Entering: checking for C99 support
Execute: /usr/bin/gcc -c -o /tmp/tmp0/test.o /tmp/tmp0/test.o.c
Command failed: /usr/bin/gcc -c -o /tmp/tmp0/test.o /tmp/tmp0/test.o.c
Exited with code 1
[Error {errorMessage = "Command failed: /usr/bin/gcc -c -o /tmp/tmp0/test.o /tmp/tmp0/test.o.c\nExited with code 1\n", errorLogContexts = ["checking for C99 support","checking for C compiler"]}]