main/musl: backport fixes from 1.2.0

wcwidth wrongly returned 0 for most of planes 4 and up
missing case mapping between U+03F3 and U+037F
wrong cacosh results for arguments with negative imaginary part
wrong catanf/catanl results for various classes of arguments
wrong return value for ungetc with argument outside [0,UCHAR_MAX]
posix_openpt with no ptys available produced wrong errno

1 files changed, 31 insertions, 0 deletions

diff --git a/main/musl/fix-return-value-of-ungetc-when-argument-is-outside-.patch b/main/musl/fix-return-value-of-ungetc-when-argument-is-outside-.patch
new file mode 100644
index 0000000000..b03b1861de
--- /dev/null
+++ b/main/musl/fix-return-value-of-ungetc-when-argument-is-outside-.patch
@@ -0,0 +1,31 @@
+From f6ecd0c296181bf6a2a7f54e3406c846500e8e63 Mon Sep 17 00:00:00 2001
+From: Rich Felker <dalias@aerifal.cx>
+Date: Fri, 18 Oct 2019 21:11:44 -0400
+Subject: [PATCH] fix return value of ungetc when argument is outside unsigned
+ char range
+
+aside from the special value EOF, ungetc is specified to accept and
+convert values outside the range of unsigned char. conversion takes
+place automatically as part of assignment when storing into the
+buffer, but the return value is also required to be the resulting
+converted value, and this requirement was not satisfied.
+
+simplified from patch by Wang Jianjian.
+---
+ src/stdio/ungetc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/stdio/ungetc.c b/src/stdio/ungetc.c
+index 180673a4..bc629d4c 100644
+--- a/src/stdio/ungetc.c
++++ b/src/stdio/ungetc.c
+@@ -16,5 +16,5 @@ int ungetc(int c, FILE *f)
+ 	f->flags &= ~F_EOF;
+ 
+ 	FUNLOCK(f);
+-	return c;
++	return (unsigned char)c;
+ }
+-- 
+2.24.1
+