rtlib: printf format specifier

- use 'll' instead of 'I64' if building for ucrt or mingw-w64's stdio implementation (for newer gcc versions and c std)
freebasic · Jul 21, 2023 · 9352b6e · 9352b6e
1 parent b9da161
commit 9352b6e
Show file tree

Hide file tree

Showing 2 changed files with 10 additions and 2 deletions.
diff --git a/changelog.txt b/changelog.txt
@@ -1,6 +1,7 @@
 Version 1.10.1
 
 [changed]
+- rtlib: printf format specifier, use 'll' instead of 'I64' if building for ucrt or mingw-w64's stdio implementation (for newer gcc versions and c std)
 
 [added]
 

diff --git a/src/rtlib/win32/fb_win32.h b/src/rtlib/win32/fb_win32.h
@@ -37,9 +37,16 @@
 #define FB_BINARY_NEWLINE_WSTR _LC("\r\n")
 
 #ifdef HOST_CYGWIN
-#define FB_LL_FMTMOD "ll"
+	#define FB_LL_FMTMOD "ll"
 #else
-#define FB_LL_FMTMOD "I64"
+	/* ucrt and mingw-w64's implementation of printf format specifers
+	   require that long long use the 'll' specifier instead of 'I64' 
+	*/
+	#if defined(_UCRT) || __USE_MINGW_ANSI_STDIO
+		#define FB_LL_FMTMOD "ll"
+	#else
+		#define FB_LL_FMTMOD "I64"
+	#endif
 #endif
 
 #define FB_CONSOLE_MAXPAGES 4