all: fix the link error with Go 1.24.3 (#312)

This addresses the issue golang/go#73617.

Closes #313

Author: hajimehoshi

.github/workflows/test.yml

@@ -137,7 +137,7 @@ jobs:
   freebsd:
     strategy:
       matrix:
-        go: ['1.18.10', '1.19.13', '1.20.14', '1.21.13', '1.22.6', '1.23.0']
+        go: ['1.18.10', '1.19.13', '1.20.14', '1.21.13', '1.22.12', '1.23.9', '1.24.3']
     name: Test with Go ${{ matrix.go }} on FreeBSD
     runs-on: ubuntu-22.04
     defaults:

dlfcn.go

@@ -83,17 +83,17 @@ func loadSymbol(handle uintptr, name string) (uintptr, error) {
 // appear to work if you link directly to the C function on darwin arm64.
 
 //go:linkname dlopen dlopen
-var dlopen uintptr
+var dlopen uint8
 var dlopenABI0 = uintptr(unsafe.Pointer(&dlopen))
 
 //go:linkname dlsym dlsym
-var dlsym uintptr
+var dlsym uint8
 var dlsymABI0 = uintptr(unsafe.Pointer(&dlsym))
 
 //go:linkname dlclose dlclose
-var dlclose uintptr
+var dlclose uint8
 var dlcloseABI0 = uintptr(unsafe.Pointer(&dlclose))
 
 //go:linkname dlerror dlerror
-var dlerror uintptr
+var dlerror uint8
 var dlerrorABI0 = uintptr(unsafe.Pointer(&dlerror))

dlfcn_darwin.go

@@ -17,8 +17,3 @@ const (
 //go:cgo_import_dynamic purego_dlsym dlsym "/usr/lib/libSystem.B.dylib"
 //go:cgo_import_dynamic purego_dlerror dlerror "/usr/lib/libSystem.B.dylib"
 //go:cgo_import_dynamic purego_dlclose dlclose "/usr/lib/libSystem.B.dylib"
-
-//go:cgo_import_dynamic purego_dlopen dlopen "/usr/lib/libSystem.B.dylib"
-//go:cgo_import_dynamic purego_dlsym dlsym "/usr/lib/libSystem.B.dylib"
-//go:cgo_import_dynamic purego_dlerror dlerror "/usr/lib/libSystem.B.dylib"
-//go:cgo_import_dynamic purego_dlclose dlclose "/usr/lib/libSystem.B.dylib"

internal/fakecgo/gen.go

@@ -76,7 +76,7 @@ call5({{.Name}}ABI0,
 {{end}}
 {{- range . }}
 //go:linkname _{{.Name}} _{{.Name}}
-var _{{.Name}} uintptr
+var _{{.Name}} uint8
 var {{.Name}}ABI0 = uintptr(unsafe.Pointer(&_{{.Name}}))
 {{ end }}
 `