From: Keith Packard <keithp@keithp.com>
Date: Wed, 18 Aug 2021 03:04:08 +0000 (-0700)
Subject: altos: Prepare for picolibc stdio change
X-Git-Tag: 1.9.8~1^2~34
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=4891f212ab13941cbe89471114dc1e5cf0f8affb

altos: Prepare for picolibc stdio change

Instead of __iob, picolibc will use stdin, stdout and stderr globals.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/kernel/ao_stdio.c b/src/kernel/ao_stdio.c
index a42c97fb..c578c57c 100644
--- a/src/kernel/ao_stdio.c
+++ b/src/kernel/ao_stdio.c
@@ -188,4 +188,20 @@ ao_flushc(FILE *ignore)
 
 static FILE __stdio = FDEV_SETUP_STREAM(ao_putc, ao_getc, ao_flushc, _FDEV_SETUP_RW);
 
+#ifdef PICOLIBC_STDIO_GLOBALS
+
+#ifdef __strong_reference
+#define STDIO_ALIAS(x) __strong_reference(stdin, x);
+#else
+#define STDIO_ALIAS(x) FILE *const x = &__stdio;
+#endif
+
+FILE *const stdin = &__stdio;
+STDIO_ALIAS(stdout);
+STDIO_ALIAS(stderr);
+
+#else
+
 FILE *const __iob[3] = { &__stdio, &__stdio, &__stdio };
+
+#endif