Check CHOLMOD version at runtime

Author: andreasnoack

base/sparse/cholmod.jl

@@ -27,7 +27,7 @@ macro cholmod_name(nm,typ) string("cholmod_", eval(typ) == SuiteSparse_long ? "l
 for Ti in IndexTypes
     @eval begin
         function common(::Type{$Ti})
-            a = fill(0xff, cholmod_com_sz)
+            a = fill(0xff, common_size)
             @isok ccall((@cholmod_name "start" $Ti
                 , :libcholmod), Cint, (Ptr{UInt8},), a)
             set_print_level(a, 0) # no printing from CHOLMOD by default
@@ -36,16 +36,41 @@ for Ti in IndexTypes
     end
 end
 
+const version_array = Array(Cint, 3)
+if dlsym(dlopen("libcholmod"), :cholmod_version) != C_NULL
+    ccall((:cholmod_version, :libcholmod), Cint, (Ptr{Cint},), version_array)
+else
+    ccall((:jl_cholmod_version, :libsuitesparse_wrapper), Cint, (Ptr{Cint},), version_array)
+end
+const version = VersionNumber(version_array...)
+
 ### These offsets are defined in SuiteSparse_wrapper.c
+const common_size = ccall((:jl_cholmod_common_size,:libsuitesparse_wrapper),Int,())
+
 const cholmod_com_offsets = Array(Csize_t, 19)
 ccall((:jl_cholmod_common_offsets, :libsuitesparse_wrapper),
-      Void, (Ptr{Csize_t},), cholmod_com_offsets)
+    Void, (Ptr{Csize_t},), cholmod_com_offsets)
+
 const common_supernodal = (1:4) + cholmod_com_offsets[4]
 const common_final_ll = (1:4) + cholmod_com_offsets[7]
 const common_print = (1:4) + cholmod_com_offsets[13]
 const common_itype = (1:4) + cholmod_com_offsets[18]
 const common_dtype = (1:4) + cholmod_com_offsets[19]
 
+function __init__()
+    println("Hej")
+    if dlsym(dlopen("libcholmod"), :cholmod_version) == C_NULL
+        throw(CHOLMODException("your version of CHOLMOD is old. It might not work correctly with Julia. Please upgrade to a more recent version."))
+    else
+        tmp = Array(Cint, 3)
+        ccall((:cholmod_version, :libcholmod), Cint, (Ptr{Cint},), version_array)
+        ccall((:jl_cholmod_version, :libsuitesparse_wrapper), Cint, (Ptr{Cint},), tmp)
+        if tmp != version_array
+            throw(CHOLMODException("your version of CHOLMOD differs from the version used when Julia was built. These versions must match."))
+        end
+    end
+end
+
 function set_print_level(cm::Array{UInt8}, lev::Integer)
     cm[common_print] = reinterpret(UInt8, [int32(lev)])
 end

base/sparse/cholmod_h.jl

@@ -75,12 +75,3 @@ end
 macro isok(A)
     :($A == TRUE || throw(CHOLMODException("")))
 end
-
-const version_array = Array(Cint, 3)
-if dlsym(dlopen("libcholmod"), :cholmod_version) != C_NULL
-    ccall((:cholmod_version, :libcholmod), Cint, (Ptr{Cint},), version_array)
-else
-    ccall((:jl_cholmod_version, :libsuitesparse_wrapper), Cint, (Ptr{Cint},), version_array)
-end
-const version = VersionNumber(version_array...)
-const cholmod_com_sz = ccall((:jl_cholmod_common_size,:libsuitesparse_wrapper),Int,())