From 0b79735b503cc0a35062799a8ac45f169f0af0f7 Mon Sep 17 00:00:00 2001 From: Alejandro Colomar Date: Fri, 11 Mar 2022 01:59:24 +0100 Subject: Added NXT_MAYBE_UNUSED for __attribute__((__unused__)). When testing some configurations of compilers and OSes, I noticed that clang(1) 13 on Debian caused a function to be compiled but unused, and the compiler triggered a compile error. To avoid that error, use __attribute__((__unused__)). Let's call our wrapper NXT_MAYBE_UNUSED, since it describes itself more precisely than the GCC attribute name. It's also the name that C2x (likely C23) has given to the standard attribute, which is [[maybe_unused]], so it's also likely to be more readable because of that name being in ISO C. --- auto/clang | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'auto') diff --git a/auto/clang b/auto/clang index 8639457a..1a05b5a3 100644 --- a/auto/clang +++ b/auto/clang @@ -176,3 +176,21 @@ nxt_feature_test="struct s { return 1; }" . auto/feature + + +nxt_feature="GCC __attribute__ unused" +nxt_feature_name=NXT_HAVE_GCC_ATTRIBUTE_UNUSED +nxt_feature_run= +nxt_feature_incs= +nxt_feature_libs= +nxt_feature_test="static void f(void) __attribute__ ((__unused__)); + + static void f(void) + { + return; + } + + int main(void) { + return 0; + }" +. auto/feature -- cgit