LoadError: "syntax: ccall argument types must be a tuple" when testing package for Julia 0.7

[chengg04]

When runnung Pkg.test("CPLEX") on Julia 0.7, I got the same error as @aritrasep in the last post of #159. As suggested by @blegat , I open this issue here as a record:

ERROR: LoadError: LoadError: syntax: ccall argument types must be a tuple; try "(T,)" and check if you specified a correct return type
Stacktrace:
 [1] include at ./boot.jl:292 [inlined]
 [2] include_relative(::Module, ::String) at ./loading.jl:521
 [3] include at ./sysimg.jl:26 [inlined]
 [4] include(::String) at /Users/chengguo/.julia/v0.7/CPLEX/src/CPLEX.jl:3
 [5] top-level scope
 [6] include at ./boot.jl:292 [inlined]
 [7] include_relative(::Module, ::String) at ./loading.jl:521
 [8] include(::Module, ::String) at ./sysimg.jl:26
 [9] top-level scope
 [10] eval at ./boot.jl:295 [inlined]
 [11] top-level scope at ./<missing>:2
in expression starting at /Users/chengguo/.julia/v0.7/CPLEX/src/cpx_solve.jl:1
in expression starting at /Users/chengguo/.julia/v0.7/CPLEX/src/CPLEX.jl:111
ERROR: LoadError: Failed to precompile CPLEX to /Users/chengguo/.julia/lib/v0.7/CPLEX.ji.

Versions:
IBM Cplex: 12.80
CPLEX.jl: 0.3.1+ master
Julia: Version 0.7.0-DEV.3444
OS: macOS Sierra Version 10.12.6

[odow]

Closing as stable. Julia 0.7 is no longer supported.