diff --git a/base/rounding.jl b/base/rounding.jl
index 7d8c17b40d936..cdef0b99f40a1 100644
--- a/base/rounding.jl
+++ b/base/rounding.jl
@@ -9,6 +9,8 @@ export
     rounding, setrounding,
     get_zero_subnormals, set_zero_subnormals
 
+const libm = Base.libm_name
+
 ## rounding modes ##
 immutable RoundingMode{T} end
 
@@ -41,8 +43,8 @@ function from_fenv(r::Integer)
     end
 end
 
-setrounding_raw{T<:Union{Float32,Float64}}(::Type{T},i::Integer) = ccall(:fesetround, Int32, (Int32,), i)
-rounding_raw{T<:Union{Float32,Float64}}(::Type{T}) = ccall(:fegetround, Int32, ())
+setrounding_raw{T<:Union{Float32,Float64}}(::Type{T},i::Integer) = ccall((:fesetround, libm), Int32, (Int32,), i)
+rounding_raw{T<:Union{Float32,Float64}}(::Type{T}) = ccall((:fegetround, libm), Int32, ())
 
 setrounding{T<:Union{Float32,Float64}}(::Type{T},r::RoundingMode) = setrounding_raw(T,to_fenv(r))
 rounding{T<:Union{Float32,Float64}}(::Type{T}) = from_fenv(rounding_raw(T))
diff --git a/base/sysimg.jl b/base/sysimg.jl
index 8a9e4d264d590..bc073670d33ce 100644
--- a/base/sysimg.jl
+++ b/base/sysimg.jl
@@ -78,6 +78,12 @@ Array{T}(::Type{T}, m::Integer)                       = Array{T,1}(Int(m))
 Array{T}(::Type{T}, m::Integer,n::Integer)            = Array{T,2}(Int(m),Int(n))
 Array{T}(::Type{T}, m::Integer,n::Integer,o::Integer) = Array{T,3}(Int(m),Int(n),Int(o))
 
+# For OS specific stuff
+include(String(vcat(length(Core.ARGS)>=2?Core.ARGS[2].data:"".data, "build_h.jl".data))) # include($BUILDROOT/base/build_h.jl)
+include(String(vcat(length(Core.ARGS)>=2?Core.ARGS[2].data:"".data, "version_git.jl".data))) # include($BUILDROOT/base/version_git.jl)
+include("osutils.jl")
+include("c.jl")
+
 # numeric operations
 include("hashing.jl")
 include("rounding.jl")
@@ -112,12 +118,6 @@ typealias StridedVector{T,A<:Union{DenseArray,StridedReshapedArray},I<:Tuple{Var
 typealias StridedMatrix{T,A<:Union{DenseArray,StridedReshapedArray},I<:Tuple{Vararg{Union{RangeIndex, NoSlice, AbstractCartesianIndex}}}}  Union{DenseArray{T,2}, SubArray{T,2,A,I}, StridedReshapedArray{T,2}}
 typealias StridedVecOrMat{T} Union{StridedVector{T}, StridedMatrix{T}}
 
-# For OS specific stuff
-include(String(vcat(length(Core.ARGS)>=2?Core.ARGS[2].data:"".data, "build_h.jl".data))) # include($BUILDROOT/base/build_h.jl)
-include(String(vcat(length(Core.ARGS)>=2?Core.ARGS[2].data:"".data, "version_git.jl".data))) # include($BUILDROOT/base/version_git.jl)
-include("osutils.jl")
-include("c.jl")
-
 # Core I/O
 include("io.jl")
 include("iostream.jl")