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authorPeter Collingbourne <peter@pcc.me.uk>2026-01-29 14:39:34 -0800
committerPeter Collingbourne <peter@pcc.me.uk>2026-01-29 14:39:34 -0800
commit7b3f189a1369f9348c007730ddea953b1e68acb1 (patch)
tree7db8969ee8a34a10b6c8ae033c939c9d653376f6 /libc/docs/dev
parentf3d6dae13ae710323a2ddbaf87af71b1abcbfada (diff)
parent0893b70ecfc4f4aca0a20a078476d191edc1e623 (diff)
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-rw-r--r--libc/docs/dev/printf_behavior.rst7
1 files changed, 7 insertions, 0 deletions
diff --git a/libc/docs/dev/printf_behavior.rst b/libc/docs/dev/printf_behavior.rst
index 01ab128..ba0578a 100644
--- a/libc/docs/dev/printf_behavior.rst
+++ b/libc/docs/dev/printf_behavior.rst
@@ -71,6 +71,13 @@ conversions (%r, %k); any fixed point number conversion will be treated as
invalid. This reduces code size. This has no effect if the current compiler does
not support fixed point numbers.
+LIBC_COPT_PRINTF_DISABLE_WIDE
+--------------------------------
+When set, this flag disables support for wide characters (%lc and %ls). Any
+conversions will be ignored. This reduces code size. This will be set by default
+on windows platforms as current printf implementation does not support UTF-16 wide
+characters.
+
LIBC_COPT_PRINTF_NO_NULLPTR_CHECKS
----------------------------------
When set, this flag disables the nullptr checks in %n and %s.