--- gcc-12.1.0/libstdc++-v3/src/c++17/fast_float/fast_float.h.orig	2022-05-08 15:36:29.485581656 +0300
+++ gcc-12.1.0/libstdc++-v3/src/c++17/fast_float/fast_float.h	2022-05-08 15:35:34.325734211 +0300
@@ -42,6 +42,14 @@
 #ifndef FASTFLOAT_FAST_FLOAT_H
 #define FASTFLOAT_FAST_FLOAT_H
 
+/* This is fugly, but stdint.h has already been included without __STDC_LIMIT_MACROS - Piru */
+#ifndef SIZE_MAX
+#define SIZE_MAX 0xffffffff
+#endif
+#ifndef UINT64_MAX
+#define UINT64_MAX 18446744073709551615ULL
+#endif
+
 namespace fast_float {
 
 using std::chars_format;