build fails with errors like "fatal error: 'clang/AST/AST.h' file not found"

Nobody has claimed this yet.

I've installed Clang 19.1.7 using Conda on macOS:
```
(base) ➜ build git:(master) clang++ --version
clang version 19.1.7
Target: arm64-apple-darwin24.5.0
Thread model: posix
InstalledDir: /Users/benwibking/miniforge3/bin
(base) ➜ build git:(master) llvm-config --version
19.1.7
```

However, when I try to build FPChecker, I get lots of errors:
```
(base) ➜ build git:(master) cmake -DCMAKE_INSTALL_PREFIX=$HOME/fpchecker_install -DCMAKE_CXX_STANDARD=17 ..
-- The CXX compiler identification is Clang 19.1.7
-- The C compiler identification is Clang 19.1.7
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Users/benwibking/miniforge3/bin/clang++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /Users/benwibking/miniforge3/bin/clang - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Found Python3: /opt/homebrew/Frameworks/Python.framework/Versions/3.13/bin/python3.13 (found version "3.13.5") found components: Interpreter
-- Looking for a CUDA compiler
-- Looking for a CUDA compiler - NOTFOUND
-- CMAKE_CXX_COMPILE_FLAGS:
-- CMAKE_CXX_COMPILER: /Users/benwibking/miniforge3/bin/clang++
-- CMAKE_CXX_FLAGS: -I/Users/benwibking/miniforge3/include -std=c++17 -stdlib=libc++ -fno-exceptions -funwind-tables -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Wall -O3 -g -std=c++14
-- CMAKE_CPP_FLAGS: -I/Users/benwibking/miniforge3/include -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-- CMAKE_SHARED_LINKER_FLAGS: -L/Users/benwibking/miniforge3/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names
-- CMAKE_INSTALL_PREFIX: /Users/benwibking/fpchecker_install
-- Configuring done (5.2s)
-- Generating done (0.0s)
-- Build files have been written to: /Users/benwibking/amrex_codes/FPChecker/build
(base) ➜ build git:(master) ninja
[1/17] Building C object CMakeFiles/fpchecker_intercept_lib.dir/interception_tool/intercept.c.o
FAILED: [code=1] CMakeFiles/fpchecker_intercept_lib.dir/interception_tool/intercept.c.o
/Users/benwibking/miniforge3/bin/clang -Dfpchecker_intercept_lib_EXPORTS -I/Users/benwibking/amrex_codes/FPChecker/build -arch arm64 -fPIC -MD -MT CMakeFiles/fpchecker_intercept_lib.dir/interception_tool/intercept.c.o -MF CMakeFiles/fpchecker_intercept_lib.dir/interception_tool/intercept.c.o.d -o CMakeFiles/fpchecker_intercept_lib.dir/interception_tool/intercept.c.o -c /Users/benwibking/amrex_codes/FPChecker/interception_tool/intercept.c
/Users/benwibking/amrex_codes/FPChecker/interception_tool/intercept.c:111:18: error: use of undeclared identifier 'environ'
111 | char **ptr = environ;
| ^
1 error generated.
[2/17] Building CXX object CMakeFiles/fpchecker_plugin.dir/plugin/instrumentation_plugin.cpp.o
FAILED: [code=1] CMakeFiles/fpchecker_plugin.dir/plugin/instrumentation_plugin.cpp.o
/Users/benwibking/miniforge3/bin/clang++ -Dfpchecker_plugin_EXPORTS -I/Users/benwibking/miniforge3/include -std=c++17 -stdlib=libc++ -fno-exceptions -funwind-tables -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Wall -O3 -g -std=c++14 -std=gnu++17 -arch arm64 -fPIC -MD -MT CMakeFiles/fpchecker_plugin.dir/plugin/instrumentation_plugin.cpp.o -MF CMakeFiles/fpchecker_plugin.dir/plugin/instrumentation_plugin.cpp.o.d -o CMakeFiles/fpchecker_plugin.dir/plugin/instrumentation_plugin.cpp.o -c /Users/benwibking/amrex_codes/FPChecker/plugin/instrumentation_plugin.cpp
/Users/benwibking/amrex_codes/FPChecker/plugin/instrumentation_plugin.cpp:14:10: fatal error: 'clang/AST/AST.h' file not found
14 | #include "clang/AST/AST.h"
| ^~~~~~~~~~~~~~~~~
1 error generated.
[5/17] Building CXX object CMakeFiles/fpchecker_cpu.dir/src/CodeMatching.cpp.o
FAILED: [code=1] CMakeFiles/fpchecker_cpu.dir/src/CodeMatching.cpp.o
/Users/benwibking/miniforge3/bin/clang++ -Dfpchecker_cpu_EXPORTS -I/Users/benwibking/miniforge3/include -std=c++17 -stdlib=libc++ -fno-exceptions -funwind-tables -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Wall -O3 -g -std=c++14 -std=gnu++17 -arch arm64 -fPIC -MD -MT CMakeFiles/fpchecker_cpu.dir/src/CodeMatching.cpp.o -MF CMakeFiles/fpchecker_cpu.dir/src/CodeMatching.cpp.o.d -o CMakeFiles/fpchecker_cpu.dir/src/CodeMatching.cpp.o -c /Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:22:14: error: no template named 'map' in namespace 'std'; did you mean 'max'?
22 | typedef std::map > key_val_pair_t;
| ~~~~~^~~
| max
/Users/benwibking/miniforge3/bin/../include/c++/v1/__algorithm/max.h:29:1: note: 'max' declared here
29 | max(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp) {
| ^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:22:14: error: a type specifier is required for all declarations
22 | typedef std::map > key_val_pair_t;
| ~~~~~~~ ^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:22:14: error: typedef declarator cannot be qualified
22 | typedef std::map > key_val_pair_t;
| ~~~~~^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:22:14: error: typedef name must be an identifier
22 | typedef std::map > key_val_pair_t;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:22:54: error: expected ';' after top level declarator
22 | typedef std::map > key_val_pair_t;
| ^
| ;
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:23:14: error: no template named 'map' in namespace 'std'; did you mean 'max'?
23 | typedef std::map global_val_annot_t;
| ~~~~~^~~
| max
/Users/benwibking/miniforge3/bin/../include/c++/v1/__algorithm/max.h:29:1: note: 'max' declared here
29 | max(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp) {
| ^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:23:39: error: use of undeclared identifier 'key_val_pair_t'
23 | typedef std::map global_val_annot_t;
| ^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:24:14: error: no template named 'map' in namespace 'std'; did you mean 'max'?
24 | typedef std::map per_module_annot_t;
| ~~~~~^~~
| max
/Users/benwibking/miniforge3/bin/../include/c++/v1/__algorithm/max.h:29:1: note: 'max' declared here
29 | max(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp) {
| ^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:24:34: error: use of undeclared identifier 'global_val_annot_t'
24 | typedef std::map per_module_annot_t;
| ^
9 errors generated.
[6/17] Building CXX object CMakeFiles/fpchecker.dir/src/CodeMatching.cpp.o
FAILED: [code=1] CMakeFiles/fpchecker.dir/src/CodeMatching.cpp.o
/Users/benwibking/miniforge3/bin/clang++ -Dfpchecker_EXPORTS -I/Users/benwibking/amrex_codes/FPChecker/src -I/Users/benwibking/miniforge3/include -std=c++17 -stdlib=libc++ -fno-exceptions -funwind-tables -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Wall -O3 -g -std=c++14 -std=gnu++17 -arch arm64 -fPIC -MD -MT CMakeFiles/fpchecker.dir/src/CodeMatching.cpp.o -MF CMakeFiles/fpchecker.dir/src/CodeMatching.cpp.o.d -o CMakeFiles/fpchecker.dir/src/CodeMatching.cpp.o -c /Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:22:14: error: no template named 'map' in namespace 'std'; did you mean 'max'?
22 | typedef std::map > key_val_pair_t;
| ~~~~~^~~
| max
/Users/benwibking/miniforge3/bin/../include/c++/v1/__algorithm/max.h:29:1: note: 'max' declared here
29 | max(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp) {
| ^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:22:14: error: a type specifier is required for all declarations
22 | typedef std::map > key_val_pair_t;
| ~~~~~~~ ^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:22:14: error: typedef declarator cannot be qualified
22 | typedef std::map > key_val_pair_t;
| ~~~~~^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:22:14: error: typedef name must be an identifier
22 | typedef std::map > key_val_pair_t;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:22:54: error: expected ';' after top level declarator
22 | typedef std::map > key_val_pair_t;
| ^
| ;
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:23:14: error: no template named 'map' in namespace 'std'; did you mean 'max'?
23 | typedef std::map global_val_annot_t;
| ~~~~~^~~
| max
/Users/benwibking/miniforge3/bin/../include/c++/v1/__algorithm/max.h:29:1: note: 'max' declared here
29 | max(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp) {
| ^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:23:39: error: use of undeclared identifier 'key_val_pair_t'
23 | typedef std::map global_val_annot_t;
| ^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:24:14: error: no template named 'map' in namespace 'std'; did you mean 'max'?
24 | typedef std::map per_module_annot_t;
| ~~~~~^~~
| max
/Users/benwibking/miniforge3/bin/../include/c++/v1/__algorithm/max.h:29:1: note: 'max' declared here
29 | max(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp) {
| ^
/Users/benwibking/amrex_codes/FPChecker/src/CodeMatching.cpp:24:34: error: use of undeclared identifier 'global_val_annot_t'
24 | typedef std::map per_module_annot_t;
| ^
9 errors generated.
[7/17] Building CXX object CMakeFiles/fpchecker_cpu.dir/src/driver_cpu.cpp.o
FAILED: [code=1] CMakeFiles/fpchecker_cpu.dir/src/driver_cpu.cpp.o
/Users/benwibking/miniforge3/bin/clang++ -Dfpchecker_cpu_EXPORTS -I/Users/benwibking/miniforge3/include -std=c++17 -stdlib=libc++ -fno-exceptions -funwind-tables -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Wall -O3 -g -std=c++14 -std=gnu++17 -arch arm64 -fPIC -MD -MT CMakeFiles/fpchecker_cpu.dir/src/driver_cpu.cpp.o -MF CMakeFiles/fpchecker_cpu.dir/src/driver_cpu.cpp.o.d -o CMakeFiles/fpchecker_cpu.dir/src/driver_cpu.cpp.o -c /Users/benwibking/amrex_codes/FPChecker/src/driver_cpu.cpp
/Users/benwibking/amrex_codes/FPChecker/src/driver_cpu.cpp:18:10: fatal error: 'llvm/Transforms/IPO/PassManagerBuilder.h' file not found
18 | #include "llvm/Transforms/IPO/PassManagerBuilder.h"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
[8/17] Building CXX object CMakeFiles/fpchecker.dir/src/driver.cpp.o
FAILED: [code=1] CMakeFiles/fpchecker.dir/src/driver.cpp.o
/Users/benwibking/miniforge3/bin/clang++ -Dfpchecker_EXPORTS -I/Users/benwibking/amrex_codes/FPChecker/src -I/Users/benwibking/miniforge3/include -std=c++17 -stdlib=libc++ -fno-exceptions -funwind-tables -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Wall -O3 -g -std=c++14 -std=gnu++17 -arch arm64 -fPIC -MD -MT CMakeFiles/fpchecker.dir/src/driver.cpp.o -MF CMakeFiles/fpchecker.dir/src/driver.cpp.o.d -o CMakeFiles/fpchecker.dir/src/driver.cpp.o -c /Users/benwibking/amrex_codes/FPChecker/src/driver.cpp
/Users/benwibking/amrex_codes/FPChecker/src/driver.cpp:18:10: fatal error: 'llvm/Transforms/IPO/PassManagerBuilder.h' file not found
18 | #include "llvm/Transforms/IPO/PassManagerBuilder.h"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
[9/17] Building CXX object CMakeFiles/fpchecker_cpu.dir/src/Instrumentation_cpu.cpp.o
FAILED: [code=1] CMakeFiles/fpchecker_cpu.dir/src/Instrumentation_cpu.cpp.o
/Users/benwibking/miniforge3/bin/clang++ -Dfpchecker_cpu_EXPORTS -I/Users/benwibking/miniforge3/include -std=c++17 -stdlib=libc++ -fno-exceptions -funwind-tables -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Wall -O3 -g -std=c++14 -std=gnu++17 -arch arm64 -fPIC -MD -MT CMakeFiles/fpchecker_cpu.dir/src/Instrumentation_cpu.cpp.o -MF CMakeFiles/fpchecker_cpu.dir/src/Instrumentation_cpu.cpp.o.d -o CMakeFiles/fpchecker_cpu.dir/src/Instrumentation_cpu.cpp.o -c /Users/benwibking/amrex_codes/FPChecker/src/Instrumentation_cpu.cpp
/Users/benwibking/amrex_codes/FPChecker/src/Instrumentation_cpu.cpp:223:33: error: no matching member function for call to 'CreateAlignedLoad'
223 | auto loadInst = builder.CreateAlignedLoad(fName, MaybeAlign(), "my");
| ~~~~~~~~^~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/IR/IRBuilder.h:1817:13: note: candidate function not viable: no known conversion from 'GlobalVariable *' to 'Type *' for 1st argument
1817 | LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, MaybeAlign Align,
| ^ ~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/IR/IRBuilder.h:1812:13: note: candidate function not viable: requires 4 arguments, but 3 were provided
1812 | LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, MaybeAlign Align,
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1813 | const char *Name) {
| ~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/IR/IRBuilder.h:1822:13: note: candidate function not viable: requires at least 4 arguments, but 3 were provided
1822 | LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, MaybeAlign Align,
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1823 | bool isVolatile, const Twine &Name = "") {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
[10/17] Building CXX object CMakeFiles/fpchecker.dir/src/Instrumentation.cpp.o
FAILED: [code=1] CMakeFiles/fpchecker.dir/src/Instrumentation.cpp.o
/Users/benwibking/miniforge3/bin/clang++ -Dfpchecker_EXPORTS -I/Users/benwibking/amrex_codes/FPChecker/src -I/Users/benwibking/miniforge3/include -std=c++17 -stdlib=libc++ -fno-exceptions -funwind-tables -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Wall -O3 -g -std=c++14 -std=gnu++17 -arch arm64 -fPIC -MD -MT CMakeFiles/fpchecker.dir/src/Instrumentation.cpp.o -MF CMakeFiles/fpchecker.dir/src/Instrumentation.cpp.o.d -o CMakeFiles/fpchecker.dir/src/Instrumentation.cpp.o -c /Users/benwibking/amrex_codes/FPChecker/src/Instrumentation.cpp
/Users/benwibking/amrex_codes/FPChecker/src/Instrumentation.cpp:172:6: warning: variable 'instrumentedOps' set but not used [-Wunused-but-set-variable]
172 | int instrumentedOps = 0;
| ^
/Users/benwibking/amrex_codes/FPChecker/src/Instrumentation.cpp:401:38: error: no member named 'getInt8PtrTy' in 'llvm::Type'; did you mean 'getInt8Ty'?
401 | ArrayType *t = ArrayType::get(Type::getInt8PtrTy(mod->getContext()), 1);
| ~~~~~~^~~~~~~~~~~~
| getInt8Ty
/Users/benwibking/miniforge3/include/llvm/IR/Type.h:461:23: note: 'getInt8Ty' declared here
461 | static IntegerType *getInt8Ty(LLVMContext &C);
| ^
/Users/benwibking/amrex_codes/FPChecker/src/Instrumentation.cpp:473:52: error: no member named 'getInt64PtrTy' in 'llvm::Type'; did you mean 'getIntNTy'?
473 | auto addCast = new AddrSpaceCastInst(gep, Type::getInt64PtrTy(mod->getContext(), 0), "my", retInst);
| ~~~~~~^~~~~~~~~~~~~
| getIntNTy
/Users/benwibking/miniforge3/include/llvm/IR/Type.h:459:23: note: 'getIntNTy' declared here
459 | static IntegerType *getIntNTy(LLVMContext &C, unsigned N);
| ^
/Users/benwibking/amrex_codes/FPChecker/src/Instrumentation.cpp:475:31: error: no matching member function for call to 'CreateAlignedLoad'
475 | auto loadInst = builder.CreateAlignedLoad(addCast, MaybeAlign(), "my");
| ~~~~~~~~^~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/IR/IRBuilder.h:1817:13: note: candidate function not viable: no known conversion from 'AddrSpaceCastInst *' to 'Type *' for 1st argument
1817 | LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, MaybeAlign Align,
| ^ ~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/IR/IRBuilder.h:1812:13: note: candidate function not viable: requires 4 arguments, but 3 were provided
1812 | LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, MaybeAlign Align,
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1813 | const char *Name) {
| ~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/IR/IRBuilder.h:1822:13: note: candidate function not viable: requires at least 4 arguments, but 3 were provided
1822 | LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, MaybeAlign Align,
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1823 | bool isVolatile, const Twine &Name = "") {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/benwibking/amrex_codes/FPChecker/src/Instrumentation.cpp:535:52: error: no member named 'getInt64PtrTy' in 'llvm::Type'; did you mean 'getIntNTy'?
535 | auto addCast = new AddrSpaceCastInst(gep, Type::getInt64PtrTy(mod->getContext(), 0), "my", retInst);
| ~~~~~~^~~~~~~~~~~~~
| getIntNTy
/Users/benwibking/miniforge3/include/llvm/IR/Type.h:459:23: note: 'getIntNTy' declared here
459 | static IntegerType *getIntNTy(LLVMContext &C, unsigned N);
| ^
/Users/benwibking/amrex_codes/FPChecker/src/Instrumentation.cpp:602:50: error: no member named 'getInt64PtrTy' in 'llvm::Type'; did you mean 'getIntNTy'?
602 | auto addCast = new AddrSpaceCastInst(gep, Type::getInt64PtrTy(mod->getContext(), 0), "my", inst);
| ~~~~~~^~~~~~~~~~~~~
| getIntNTy
/Users/benwibking/miniforge3/include/llvm/IR/Type.h:459:23: note: 'getIntNTy' declared here
459 | static IntegerType *getIntNTy(LLVMContext &C, unsigned N);
| ^
/Users/benwibking/amrex_codes/FPChecker/src/Instrumentation.cpp:614:4: error: no viable conversion from 'llvm::AtomicOrdering' to 'MaybeAlign'
614 | AtomicOrdering::SequentiallyConsistent,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/Support/Alignment.h:126:3: note: candidate constructor not viable: no known conversion from 'llvm::AtomicOrdering' to 'const MaybeAlign &' for 1st argument
126 | MaybeAlign(const MaybeAlign &Other) = default;
| ^ ~~~~~~~~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/Support/Alignment.h:128:3: note: candidate constructor not viable: no known conversion from 'llvm::AtomicOrdering' to 'MaybeAlign &&' for 1st argument
128 | MaybeAlign(MaybeAlign &&Other) = default;
| ^ ~~~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/Support/Alignment.h:131:13: note: candidate constructor not viable: no known conversion from 'llvm::AtomicOrdering' to 'std::nullopt_t' for 1st argument
131 | constexpr MaybeAlign(std::nullopt_t None) : UP(None) {}
| ^ ~~~~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/Support/Alignment.h:132:13: note: candidate constructor not viable: no known conversion from 'llvm::AtomicOrdering' to 'Align' for 1st argument
132 | constexpr MaybeAlign(Align Value) : UP(Value) {}
| ^ ~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/Support/Alignment.h:133:12: note: explicit constructor is not a candidate
133 | explicit MaybeAlign(uint64_t Value) {
| ^
/Users/benwibking/miniforge3/include/llvm/IR/IRBuilder.h:1846:70: note: passing argument to parameter 'Align' here
1846 | CreateAtomicCmpXchg(Value *Ptr, Value *Cmp, Value *New, MaybeAlign Align,
| ^
/Users/benwibking/amrex_codes/FPChecker/src/Instrumentation.cpp:650:56: error: no member named 'getInt64PtrTy' in 'llvm::Type'; did you mean 'getIntNTy'?
650 | auto addCastTmp = new AddrSpaceCastInst(gepTmp, Type::getInt64PtrTy(mod->getContext(), 0), "my", firstInst);
| ~~~~~~^~~~~~~~~~~~~
| getIntNTy
/Users/benwibking/miniforge3/include/llvm/IR/Type.h:459:23: note: 'getIntNTy' declared here
459 | static IntegerType *getIntNTy(LLVMContext &C, unsigned N);
| ^
/Users/benwibking/amrex_codes/FPChecker/src/Instrumentation.cpp:657:4: error: no viable conversion from 'llvm::AtomicOrdering' to 'MaybeAlign'
657 | AtomicOrdering::SequentiallyConsistent,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/Support/Alignment.h:126:3: note: candidate constructor not viable: no known conversion from 'llvm::AtomicOrdering' to 'const MaybeAlign &' for 1st argument
126 | MaybeAlign(const MaybeAlign &Other) = default;
| ^ ~~~~~~~~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/Support/Alignment.h:128:3: note: candidate constructor not viable: no known conversion from 'llvm::AtomicOrdering' to 'MaybeAlign &&' for 1st argument
128 | MaybeAlign(MaybeAlign &&Other) = default;
| ^ ~~~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/Support/Alignment.h:131:13: note: candidate constructor not viable: no known conversion from 'llvm::AtomicOrdering' to 'std::nullopt_t' for 1st argument
131 | constexpr MaybeAlign(std::nullopt_t None) : UP(None) {}
| ^ ~~~~~~~~~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/Support/Alignment.h:132:13: note: candidate constructor not viable: no known conversion from 'llvm::AtomicOrdering' to 'Align' for 1st argument
132 | constexpr MaybeAlign(Align Value) : UP(Value) {}
| ^ ~~~~~~~~~~~
/Users/benwibking/miniforge3/include/llvm/Support/Alignment.h:133:12: note: explicit constructor is not a candidate
133 | explicit MaybeAlign(uint64_t Value) {
| ^
/Users/benwibking/miniforge3/include/llvm/IR/IRBuilder.h:1846:70: note: passing argument to parameter 'Align' here
1846 | CreateAtomicCmpXchg(Value *Ptr, Value *Cmp, Value *New, MaybeAlign Align,
| ^
1 warning and 8 errors generated.
[12/17] Building CXX object CMakeFiles/fpchecker_cpu.dir/src/Utility.cpp.o
ninja: build stopped: subcommand failed.
```

Is there a flag that I'm missing?

Reproduce the reported CMake/Ninja build first, then inspect the failures in interception_tool/intercept.c, plugin/instrumentation_plugin.cpp, src/CodeMatching.cpp, and src/driver_cpu.cpp. Compare the configured Clang/LLVM include and library paths with the headers required by these entry points. Done means the reported missing-header, environ, and std::map errors no longer prevent ninja from completing.

Written by the indexing model from the issue text.