Switch _PRINTF_PERCENT_N_ to __IO_PERCENT_N

Match other printf/scanf options.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

CMakeLists.txt

@@ -223,8 +223,8 @@ if(NOT DEFINED _PRINTF_SMALL_ULTOA)
   option(_PRINTF_SMALL_ULTOA "Avoid soft divide in printf" ON)
 endif()
 
-if(NOT DEFINED _PRINTF_PERCENT_N)
-  option(_PRINTF_PERCENT_N "Support %n formats in printf" OFF)
+if(NOT DEFINED __IO_PERCENT_N)
+  option(__IO_PERCENT_N "Support %n formats in printf" OFF)
 endif()
 
 if(NOT DEFINED __IO_PERCENT_B)

meson.build

@@ -1411,7 +1411,7 @@ if tinystdio
   conf_data.set('_PRINTF_SMALL_ULTOA',
                 printf_small_ultoa,
                 description: 'avoid software division in decimal conversion')
-  conf_data.set('_PRINTF_PERCENT_N',
+  conf_data.set('__IO_PERCENT_N',
                 printf_percent_n,
                 description: 'support %n in printf format strings')
   conf_data.set('__ATOMIC_UNGETC',

newlib/libc/tinystdio/vfprintf.c

@@ -1162,7 +1162,7 @@ int vfprintf (FILE * stream, const CHAR *fmt, va_list ap_orig)
 #endif
                 }
 #endif
-#if defined(_PRINTF_PERCENT_N) || defined(VFPRINTF_S)
+#if defined(__IO_PERCENT_N) || defined(VFPRINTF_S)
             } else if (c == 'n') {
 #ifdef VFPRINTF_S
                 msg = "format string contains percent-n";

picolibc.h.in

@@ -79,7 +79,7 @@
 
 #cmakedefine _PRINTF_SMALL_ULTOA
 
-#cmakedefine _PRINTF_PERCENT_N
+#cmakedefine __IO_PERCENT_N
 
 #cmakedefine __IO_PERCENT_B
 

test/libc-testsuite/snprintf.c

@@ -199,7 +199,7 @@ static int test_snprintf(void)
 #endif
 #endif
 
-#if !defined(__TINY_STDIO) || defined(_PRINTF_PERCENT_N)
+#if !defined(__TINY_STDIO) || defined(__IO_PERCENT_N)
         /* Tests for %hhn, %hn, %n, %ln, %lln */
         int len;
         short slen;

test/test-sprintf-percent-n.c

@@ -41,7 +41,7 @@
 
 int main(void) {
 
-#if defined(__PICOLIBC__) && defined(__TINY_STDIO) && !defined(_PRINTF_PERCENT_N)
+#if defined(__PICOLIBC__) && defined(__TINY_STDIO) && !defined(__IO_PERCENT_N)
     printf("printf: %%n unsupported\n");
     return 77;
 #else