[libc-commits] [libc] [libc] Provide `LIBC_TYPES_HAS_INT64` (PR #83441)

[Guillaume Chatelet via libc-commits]

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@@ -10,14 +10,15 @@
 #ifndef LLVM_LIBC_SRC___SUPPORT_MACROS_PROPERTIES_TYPES_H
 #define LLVM_LIBC_SRC___SUPPORT_MACROS_PROPERTIES_TYPES_H
 
-#include "include/llvm-libc-macros/float-macros.h"  // LDBL_MANT_DIG
-#include "include/llvm-libc-macros/stdint-macros.h" // UINT64_MAX
-#include "include/llvm-libc-types/float128.h"       // float128
+#include "include/llvm-libc-macros/float-macros.h" // LDBL_MANT_DIG
+#include "include/llvm-libc-types/float128.h"      // float128
 #include "src/__support/macros/properties/architectures.h"
 #include "src/__support/macros/properties/compiler.h"
 #include "src/__support/macros/properties/cpu_features.h"
 #include "src/__support/macros/properties/os.h"
 
+#include <stdint.h> // UINT64_MAX
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gchatelet wrote:

This triggers a lot of errors like the following
```
/redacted/git/llvm-project/libc/include/llvm-libc-macros/stdint-macros.h:832:9: error: 'INTMAX_MIN' macro redefined [-Werror,-Wmacro-redefined]
#define INTMAX_MIN (-__INTMAX_MAX__ - 1)
        ^
/usr/lib/llvm-16/lib/clang/16/include/stdint.h:927:10: note: previous definition is here
#define  INTMAX_MIN (-__INTMAX_MAX__-1)
```

I believe this is because `types.h` is quite up in the include hierarchy. We probably need to replace all `#include <stdint.h>` with `#include "include/llvm-libc-macros/stdint-macros.h"` in one shot and I'm reluctant to do this in this PR.

https://github.com/llvm/llvm-project/pull/83441