Cygwin's ctype.h says;
/* These macros are intentionally written in a manner that will trigger
a gcc -Wall warning if the user mistakenly passes a 'char' instead
of an int containing an 'unsigned char'.
(snip) */
---
tools/c-index-test/c-index-test.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
...Takumi
diff --git a/tools/c-index-test/c-index-test.c b/tools/c-index-test/c-index-test.c
index d4e567d..d424e24 100644
--- a/tools/c-index-test/c-index-test.c
+++ b/tools/c-index-test/c-index-test.c
@@ -990,7 +990,7 @@ void print_completion_result(CXCompletionResult *completion_result,
int my_stricmp(const char *s1, const char *s2) {
while (*s1 && *s2) {
- int c1 = tolower(*s1), c2 = tolower(*s2);
+ int c1 = tolower((unsigned char)*s1), c2 = tolower((unsigned char)*s2);
if (c1 < c2)
return -1;
else if (c1 > c2)
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