diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index f4bd536..4bf2e8d 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        llvm: [14, 15, 16, 17, 18, 19, 20]
+        llvm: [14, 15, 16, 17, 18, 19, 20, 21]
         go-version: [1.18.x, 1.21.x, 1.22.x]
     steps:
       - name: Checkout
@@ -24,7 +24,7 @@ jobs:
       #  run: brew update
       # Optional step when a LLVM version is very new.
       - name: Update Homebrew
-        if: matrix.llvm == 20
+        if: matrix.llvm == 21
         run: brew update
       - name: Install LLVM
         run: HOMEBREW_NO_AUTO_UPDATE=1 brew install llvm@${{ matrix.llvm }}
@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        llvm: [14, 15, 16, 17, 18, 19, 20]
+        llvm: [14, 15, 16, 17, 18, 19, 20, 21]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
diff --git a/executionengine.go b/executionengine.go
index 5fa8204..f9a3f99 100644
--- a/executionengine.go
+++ b/executionengine.go
@@ -18,8 +18,10 @@ package llvm
 #include <stdlib.h>
 */
 import "C"
-import "unsafe"
-import "errors"
+import (
+	"errors"
+	"unsafe"
+)
 
 func LinkInMCJIT()       { C.LLVMLinkInMCJIT() }
 func LinkInInterpreter() { C.LLVMLinkInInterpreter() }
@@ -110,6 +112,17 @@ func NewInterpreter(m Module) (ee ExecutionEngine, err error) {
 	return
 }
 
+func NewJITCompiler(m Module, optLevel int) (ee ExecutionEngine, err error) {
+	var cmsg *C.char
+	fail := C.LLVMCreateJITCompilerForModule(&ee.C, m.C, C.uint(optLevel), &cmsg)
+	if fail != 0 {
+		ee.C = nil
+		err = errors.New(C.GoString(cmsg))
+		C.LLVMDisposeMessage(cmsg)
+	}
+	return
+}
+
 func NewMCJITCompilerOptions() MCJITCompilerOptions {
 	var options C.struct_LLVMMCJITCompilerOptions
 	C.LLVMInitializeMCJITCompilerOptions(&options, C.size_t(unsafe.Sizeof(C.struct_LLVMMCJITCompilerOptions{})))
@@ -159,6 +172,12 @@ func (ee ExecutionEngine) FindFunction(name string) (f Value) {
 	return
 }
 
+func (ee ExecutionEngine) GetFunctionAddress(name string) uint64 {
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+	return uint64(C.LLVMGetFunctionAddress(ee.C, cname))
+}
+
 func (ee ExecutionEngine) RecompileAndRelinkFunction(f Value) unsafe.Pointer {
 	return C.LLVMRecompileAndRelinkFunction(ee.C, f.C)
 }
diff --git a/ir.go b/ir.go
index 17e10a5..6455e09 100644
--- a/ir.go
+++ b/ir.go
@@ -77,7 +77,6 @@ type (
 	ComdatSelectionKind C.LLVMComdatSelectionKind
 	IntPredicate        C.LLVMIntPredicate
 	FloatPredicate      C.LLVMRealPredicate
-	LandingPadClause    C.LLVMLandingPadClauseTy
 	InlineAsmDialect    C.LLVMInlineAsmDialect
 )
 
@@ -355,15 +354,6 @@ const (
 	FloatPredicateTrue  FloatPredicate = C.LLVMRealPredicateTrue
 )
 
-//-------------------------------------------------------------------------
-// llvm.LandingPadClause
-//-------------------------------------------------------------------------
-
-const (
-	LandingPadCatch  LandingPadClause = C.LLVMLandingPadCatch
-	LandingPadFilter LandingPadClause = C.LLVMLandingPadFilter
-)
-
 //-------------------------------------------------------------------------
 // llvm.InlineAsmDialect
 //-------------------------------------------------------------------------
@@ -939,9 +929,6 @@ func ConstNUWAdd(lhs, rhs Value) (v Value) { v.C = C.LLVMConstNUWAdd(lhs.C, rhs.
 func ConstSub(lhs, rhs Value) (v Value)    { v.C = C.LLVMConstSub(lhs.C, rhs.C); return }
 func ConstNSWSub(lhs, rhs Value) (v Value) { v.C = C.LLVMConstNSWSub(lhs.C, rhs.C); return }
 func ConstNUWSub(lhs, rhs Value) (v Value) { v.C = C.LLVMConstNUWSub(lhs.C, rhs.C); return }
-func ConstMul(lhs, rhs Value) (v Value)    { v.C = C.LLVMConstMul(lhs.C, rhs.C); return }
-func ConstNSWMul(lhs, rhs Value) (v Value) { v.C = C.LLVMConstNSWMul(lhs.C, rhs.C); return }
-func ConstNUWMul(lhs, rhs Value) (v Value) { v.C = C.LLVMConstNUWMul(lhs.C, rhs.C); return }
 func ConstXor(lhs, rhs Value) (v Value)    { v.C = C.LLVMConstXor(lhs.C, rhs.C); return }
 
 func ConstGEP(t Type, v Value, indices []Value) (rv Value) {
diff --git a/ir_test.go b/ir_test.go
index 57b306f..a912aec 100644
--- a/ir_test.go
+++ b/ir_test.go
@@ -62,7 +62,6 @@ func TestAttributes(t *testing.T) {
 		"nest",
 		"noalias",
 		"nobuiltin",
-		"nocapture",
 		"noduplicate",
 		"noimplicitfloat",
 		"noinline",
diff --git a/llvm_config_darwin_llvm14.go b/llvm_config_darwin_llvm14.go
deleted file mode 100644
index 2a3c8a9..0000000
--- a/llvm_config_darwin_llvm14.go
+++ /dev/null
@@ -1,15 +0,0 @@
-//go:build !byollvm && darwin && llvm14
-
-package llvm
-
-// Automatically generated by `make config BUILDDIR=`, do not edit.
-
-// #cgo amd64 CPPFLAGS: -I/usr/local/opt/llvm@14/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo amd64 CXXFLAGS: -std=c++14
-// #cgo amd64 LDFLAGS: -L/usr/local/opt/llvm@14/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-// #cgo arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@14/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo arm64 CXXFLAGS: -std=c++14
-// #cgo arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@14/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_darwin_llvm15.go b/llvm_config_darwin_llvm15.go
deleted file mode 100644
index 07a72fc..0000000
--- a/llvm_config_darwin_llvm15.go
+++ /dev/null
@@ -1,15 +0,0 @@
-//go:build !byollvm && darwin && llvm15
-
-package llvm
-
-// Automatically generated by `make config BUILDDIR=`, do not edit.
-
-// #cgo amd64 CPPFLAGS: -I/usr/local/opt/llvm@15/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo amd64 CXXFLAGS: -std=c++14
-// #cgo amd64 LDFLAGS: -L/usr/local/opt/llvm@15/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-// #cgo arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@15/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo arm64 CXXFLAGS: -std=c++14
-// #cgo arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@15/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_darwin_llvm16.go b/llvm_config_darwin_llvm16.go
deleted file mode 100644
index 2acf0b0..0000000
--- a/llvm_config_darwin_llvm16.go
+++ /dev/null
@@ -1,15 +0,0 @@
-//go:build !byollvm && darwin && llvm16
-
-package llvm
-
-// Automatically generated by `make config BUILDDIR=`, do not edit.
-
-// #cgo amd64 CPPFLAGS: -I/usr/local/opt/llvm@16/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo amd64 CXXFLAGS: -std=c++17
-// #cgo amd64 LDFLAGS: -L/usr/local/opt/llvm@16/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-// #cgo arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@16/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo arm64 CXXFLAGS: -std=c++17
-// #cgo arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@16/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_darwin_llvm17.go b/llvm_config_darwin_llvm17.go
deleted file mode 100644
index 3dc8f26..0000000
--- a/llvm_config_darwin_llvm17.go
+++ /dev/null
@@ -1,15 +0,0 @@
-//go:build !byollvm && darwin && llvm17
-
-package llvm
-
-// Automatically generated by `make config BUILDDIR=`, do not edit.
-
-// #cgo amd64 CPPFLAGS: -I/usr/local/opt/llvm@17/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo amd64 CXXFLAGS: -std=c++17
-// #cgo amd64 LDFLAGS: -L/usr/local/opt/llvm@17/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-// #cgo arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@17/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo arm64 CXXFLAGS: -std=c++17
-// #cgo arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@17/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_darwin_llvm18.go b/llvm_config_darwin_llvm18.go
deleted file mode 100644
index 744a11e..0000000
--- a/llvm_config_darwin_llvm18.go
+++ /dev/null
@@ -1,15 +0,0 @@
-//go:build !byollvm && darwin && llvm18
-
-package llvm
-
-// Automatically generated by `make config BUILDDIR=`, do not edit.
-
-// #cgo amd64 CPPFLAGS: -I/usr/local/opt/llvm@18/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo amd64 CXXFLAGS: -std=c++17
-// #cgo amd64 LDFLAGS: -L/usr/local/opt/llvm@18/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-// #cgo arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@18/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo arm64 CXXFLAGS: -std=c++17
-// #cgo arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@18/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_darwin_llvm19.go b/llvm_config_darwin_llvm19.go
deleted file mode 100644
index ac09d67..0000000
--- a/llvm_config_darwin_llvm19.go
+++ /dev/null
@@ -1,15 +0,0 @@
-//go:build !byollvm && darwin && !llvm14 && !llvm15 && !llvm16 && !llvm17 && !llvm18 && !llvm20
-
-package llvm
-
-// Automatically generated by `make config BUILDDIR=`, do not edit.
-
-// #cgo amd64 CPPFLAGS: -I/usr/local/opt/llvm@19/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo amd64 CXXFLAGS: -std=c++17
-// #cgo amd64 LDFLAGS: -L/usr/local/opt/llvm@19/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-// #cgo arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@19/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo arm64 CXXFLAGS: -std=c++17
-// #cgo arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@19/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_darwin_llvm20.go b/llvm_config_darwin_llvm20.go
deleted file mode 100644
index 880e0d0..0000000
--- a/llvm_config_darwin_llvm20.go
+++ /dev/null
@@ -1,15 +0,0 @@
-//go:build !byollvm && darwin && llvm20
-
-package llvm
-
-// Automatically generated by `make config BUILDDIR=`, do not edit.
-
-// #cgo amd64 CPPFLAGS: -I/usr/local/opt/llvm@20/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo amd64 CXXFLAGS: -std=c++17
-// #cgo amd64 LDFLAGS: -L/usr/local/opt/llvm@20/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-// #cgo arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@20/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo arm64 CXXFLAGS: -std=c++17
-// #cgo arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@20/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_linux_llvm14.go b/llvm_config_linux_llvm14.go
deleted file mode 100644
index 3f91a53..0000000
--- a/llvm_config_linux_llvm14.go
+++ /dev/null
@@ -1,10 +0,0 @@
-//go:build !byollvm && linux && llvm14
-
-package llvm
-
-// #cgo CPPFLAGS: -I/usr/lib/llvm-14/include -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo CXXFLAGS: -std=c++14
-// #cgo LDFLAGS: -L/usr/lib/llvm-14/lib  -lLLVM-14
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_linux_llvm15.go b/llvm_config_linux_llvm15.go
deleted file mode 100644
index 607ed7e..0000000
--- a/llvm_config_linux_llvm15.go
+++ /dev/null
@@ -1,10 +0,0 @@
-//go:build !byollvm && linux && llvm15
-
-package llvm
-
-// #cgo CPPFLAGS: -I/usr/lib/llvm-15/include -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo CXXFLAGS: -std=c++14
-// #cgo LDFLAGS: -L/usr/lib/llvm-15/lib  -lLLVM-15
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_linux_llvm16.go b/llvm_config_linux_llvm16.go
deleted file mode 100644
index 4208cf4..0000000
--- a/llvm_config_linux_llvm16.go
+++ /dev/null
@@ -1,10 +0,0 @@
-//go:build !byollvm && linux && llvm16
-
-package llvm
-
-// #cgo CPPFLAGS: -I/usr/lib/llvm-16/include -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo CXXFLAGS: -std=c++17
-// #cgo LDFLAGS: -L/usr/lib/llvm-16/lib  -lLLVM-16
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_linux_llvm17.go b/llvm_config_linux_llvm17.go
deleted file mode 100644
index f2951d7..0000000
--- a/llvm_config_linux_llvm17.go
+++ /dev/null
@@ -1,10 +0,0 @@
-//go:build !byollvm && linux && llvm17
-
-package llvm
-
-// #cgo CPPFLAGS: -I/usr/include/llvm-17 -I/usr/include/llvm-c-17 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo CXXFLAGS: -std=c++17
-// #cgo LDFLAGS: -L/usr/lib/llvm-17/lib  -lLLVM-17
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_linux_llvm18.go b/llvm_config_linux_llvm18.go
deleted file mode 100644
index a4bbea0..0000000
--- a/llvm_config_linux_llvm18.go
+++ /dev/null
@@ -1,10 +0,0 @@
-//go:build !byollvm && linux && llvm18
-
-package llvm
-
-// #cgo CPPFLAGS: -I/usr/include/llvm-18 -I/usr/include/llvm-c-18 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo CXXFLAGS: -std=c++17
-// #cgo LDFLAGS: -L/usr/lib/llvm-18/lib  -lLLVM-18
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_linux_llvm19.go b/llvm_config_linux_llvm19.go
deleted file mode 100644
index 3fec2f8..0000000
--- a/llvm_config_linux_llvm19.go
+++ /dev/null
@@ -1,10 +0,0 @@
-//go:build !byollvm && linux && !llvm14 && !llvm15 && !llvm16 && !llvm17 && !llvm18 && !llvm20
-
-package llvm
-
-// #cgo CPPFLAGS: -I/usr/include/llvm-19 -I/usr/include/llvm-c-19 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo CXXFLAGS: -std=c++17
-// #cgo LDFLAGS: -L/usr/lib/llvm-19/lib -lLLVM-19
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_linux_llvm20.go b/llvm_config_linux_llvm20.go
deleted file mode 100644
index 90c8b9b..0000000
--- a/llvm_config_linux_llvm20.go
+++ /dev/null
@@ -1,10 +0,0 @@
-//go:build !byollvm && linux && llvm20
-
-package llvm
-
-// #cgo CPPFLAGS: -I/usr/include/llvm-20 -I/usr/include/llvm-c-20 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-// #cgo CXXFLAGS: -std=c++17
-// #cgo LDFLAGS: -L/usr/lib/llvm-20/lib -lLLVM-20
-import "C"
-
-type run_build_sh int
diff --git a/llvm_config_llvm14.go b/llvm_config_llvm14.go
new file mode 100644
index 0000000..9d38a5b
--- /dev/null
+++ b/llvm_config_llvm14.go
@@ -0,0 +1,16 @@
+//go:build !byollvm && llvm14
+
+package llvm
+
+// #cgo darwin,amd64 CPPFLAGS: -I/usr/local/opt/llvm@14/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,amd64 CXXFLAGS: -std=c++14
+// #cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@14/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo darwin,arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@14/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,arm64 CXXFLAGS: -std=c++14
+// #cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@14/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo linux        CPPFLAGS: -I/usr/lib/llvm-14/include -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo linux        CXXFLAGS: -std=c++14
+// #cgo linux        LDFLAGS: -L/usr/lib/llvm-14/lib  -lLLVM-14
+import "C"
+
+type run_build_sh int
diff --git a/llvm_config_llvm15.go b/llvm_config_llvm15.go
new file mode 100644
index 0000000..34aebc0
--- /dev/null
+++ b/llvm_config_llvm15.go
@@ -0,0 +1,16 @@
+//go:build !byollvm && llvm15
+
+package llvm
+
+// #cgo darwin,amd64 CPPFLAGS: -I/usr/local/opt/llvm@15/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,amd64 CXXFLAGS: -std=c++14
+// #cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@15/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo darwin,arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@15/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,arm64 CXXFLAGS: -std=c++14
+// #cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@15/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo linux        CPPFLAGS: -I/usr/lib/llvm-15/include -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo linux        CXXFLAGS: -std=c++14
+// #cgo linux        LDFLAGS: -L/usr/lib/llvm-15/lib  -lLLVM-15
+import "C"
+
+type run_build_sh int
diff --git a/llvm_config_llvm16.go b/llvm_config_llvm16.go
new file mode 100644
index 0000000..936ca0f
--- /dev/null
+++ b/llvm_config_llvm16.go
@@ -0,0 +1,16 @@
+//go:build !byollvm && llvm16
+
+package llvm
+
+// #cgo darwin,amd64 CPPFLAGS: -I/usr/local/opt/llvm@16/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,amd64 CXXFLAGS: -std=c++17
+// #cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@16/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo darwin,arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@16/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,arm64 CXXFLAGS: -std=c++17
+// #cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@16/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo linux        CPPFLAGS: -I/usr/lib/llvm-16/include -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo linux        CXXFLAGS: -std=c++17
+// #cgo linux        LDFLAGS: -L/usr/lib/llvm-16/lib  -lLLVM-16
+import "C"
+
+type run_build_sh int
diff --git a/llvm_config_llvm17.go b/llvm_config_llvm17.go
new file mode 100644
index 0000000..6a00b39
--- /dev/null
+++ b/llvm_config_llvm17.go
@@ -0,0 +1,16 @@
+//go:build !byollvm && llvm17
+
+package llvm
+
+// #cgo darwin,amd64 CPPFLAGS: -I/usr/local/opt/llvm@17/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,amd64 CXXFLAGS: -std=c++17
+// #cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@17/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo darwin,arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@17/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,arm64 CXXFLAGS: -std=c++17
+// #cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@17/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo linux        CPPFLAGS: -I/usr/include/llvm-17 -I/usr/include/llvm-c-17 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo linux        CXXFLAGS: -std=c++17
+// #cgo linux        LDFLAGS: -L/usr/lib/llvm-17/lib  -lLLVM-17
+import "C"
+
+type run_build_sh int
diff --git a/llvm_config_llvm18.go b/llvm_config_llvm18.go
new file mode 100644
index 0000000..c41fea0
--- /dev/null
+++ b/llvm_config_llvm18.go
@@ -0,0 +1,16 @@
+//go:build !byollvm && llvm18
+
+package llvm
+
+// #cgo darwin,amd64 CPPFLAGS: -I/usr/local/opt/llvm@18/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,amd64 CXXFLAGS: -std=c++17
+// #cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@18/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo darwin,arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@18/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,arm64 CXXFLAGS: -std=c++17
+// #cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@18/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo linux        CPPFLAGS: -I/usr/include/llvm-18 -I/usr/include/llvm-c-18 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo linux        CXXFLAGS: -std=c++17
+// #cgo linux        LDFLAGS: -L/usr/lib/llvm-18/lib  -lLLVM-18
+import "C"
+
+type run_build_sh int
diff --git a/llvm_config_llvm19.go b/llvm_config_llvm19.go
new file mode 100644
index 0000000..78dd5a0
--- /dev/null
+++ b/llvm_config_llvm19.go
@@ -0,0 +1,19 @@
+//go:build !byollvm && !llvm14 && !llvm15 && !llvm16 && !llvm17 && !llvm18 && !llvm20 && !llvm21
+
+package llvm
+
+// #cgo darwin,amd64 CPPFLAGS: -I/usr/local/opt/llvm@19/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,amd64 CXXFLAGS: -std=c++17
+// #cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@19/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo darwin,arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@19/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,arm64 CXXFLAGS: -std=c++17
+// #cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@19/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo freebsd      CPPFLAGS: -I/usr/local/llvm19/include -I/usr/local/llvm19/include/llvm-c -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo freebsd      CXXFLAGS: -std=c++17
+// #cgo freebsd      LDFLAGS: -L/usr/local/llvm19/lib -lLLVM
+// #cgo linux        CPPFLAGS: -I/usr/include/llvm-19 -I/usr/include/llvm-c-19 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo linux        CXXFLAGS: -std=c++17
+// #cgo linux        LDFLAGS: -L/usr/lib/llvm-19/lib -lLLVM-19
+import "C"
+
+type run_build_sh int
diff --git a/llvm_config_llvm20.go b/llvm_config_llvm20.go
new file mode 100644
index 0000000..090bdd6
--- /dev/null
+++ b/llvm_config_llvm20.go
@@ -0,0 +1,19 @@
+//go:build !byollvm && llvm20
+
+package llvm
+
+// #cgo darwin,amd64 CPPFLAGS: -I/usr/local/opt/llvm@20/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,amd64 CXXFLAGS: -std=c++17
+// #cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@20/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo darwin,arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@20/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,arm64 CXXFLAGS: -std=c++17
+// #cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@20/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo freebsd      CPPFLAGS: -I/usr/local/llvm20/include -I/usr/local/llvm20/include/llvm-c -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo freebsd      CXXFLAGS: -std=c++17
+// #cgo freebsd      LDFLAGS: -L/usr/local/llvm20/lib -lLLVM
+// #cgo linux        CPPFLAGS: -I/usr/include/llvm-20 -I/usr/include/llvm-c-20 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo linux        CXXFLAGS: -std=c++17
+// #cgo linux        LDFLAGS: -L/usr/lib/llvm-20/lib -lLLVM-20
+import "C"
+
+type run_build_sh int
diff --git a/llvm_config_llvm21.go b/llvm_config_llvm21.go
new file mode 100644
index 0000000..263c2fc
--- /dev/null
+++ b/llvm_config_llvm21.go
@@ -0,0 +1,19 @@
+//go:build !byollvm && llvm21
+
+package llvm
+
+// #cgo darwin,amd64 CPPFLAGS: -I/usr/local/opt/llvm@21/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,amd64 CXXFLAGS: -std=c++17
+// #cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@21/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo darwin,arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@21/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo darwin,arm64 CXXFLAGS: -std=c++17
+// #cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@21/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo freebsd      CPPFLAGS: -I/usr/local/llvm21/include -I/usr/local/llvm21/include/llvm-c -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo freebsd      CXXFLAGS: -std=c++17
+// #cgo freebsd      LDFLAGS: -L/usr/local/llvm21/lib -lLLVM
+// #cgo linux        CPPFLAGS: -I/usr/include/llvm-21 -I/usr/include/llvm-c-21 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo linux        CXXFLAGS: -std=c++17
+// #cgo linux        LDFLAGS: -L/usr/lib/llvm-21/lib -lLLVM-21
+import "C"
+
+type run_build_sh int