diff -ru giac-1.9.0.orig/src/first.h giac-1.9.0/src/first.h
--- giac-1.9.0.orig/src/first.h 2023-06-18 21:23:20.774912898 +0200
+++ giac-1.9.0/src/first.h      2023-06-18 21:24:54.712829079 +0200
@@ -29,6 +29,7 @@
 #define GIAC_VERSION VERSION
 #endif
 //#include <stdint.h>
+#include <tuple>
 
 // mingw now defines x86_64
 #if (defined(__x86_64__) || defined(__arm64__)) && !defined __MINGW_H