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autotools: silence gcc warnings in libtool code

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```
./.libs/lt-upload-pausing.c: In function 'lt_fatal':
./.libs/lt-upload-pausing.c:593:1: warning: function might be candidate for attribute 'noreturn' [-Wsuggest-attribute=noreturn]
  593 | lt_fatal (const char *file, int line, const char *message, ...)
      | ^~~~~~~~
```
https://github.com/curl/curl/actions/runs/12611924141/job/35148104431?pr=15911#step:11:264

Ref: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wsuggest-attribute_003d

Closes #15915
This commit is contained in:
Viktor Szakats 2025-01-05 14:24:40 +01:00
parent 893e57e84c
commit a3a131b2a6
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1 changed files with 6 additions and 0 deletions
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6
m4/curl-compilers.m4
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@ -1044,6 +1044,12 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
if test "$curl_cv_native_windows" = "yes"; then
tmp_CFLAGS="$tmp_CFLAGS -Wno-pedantic-ms-format"
fi
case $host_os in
cygwin*)
dnl Silence warning in 'lt_fatal' libtool function
tmp_CFLAGS="$tmp_CFLAGS -Wno-suggest-attribute=noreturn"
;;
esac
fi
#
dnl Only gcc 4.6 or later