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cmulocal/visibility.m4: update from Gnulib serial 8 → 9 #4951

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Jul 19, 2024
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cmulocal/visibility.m4: update from Gnulib serial 8 → 9 #4951

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13 changes: 7 additions & 6 deletions cmulocal/visibility.m4
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
# visibility.m4 serial 8
dnl Copyright (C) 2005, 2008, 2010-2021 Free Software Foundation, Inc.
# visibility.m4
# serial 9
dnl Copyright (C) 2005, 2008, 2010-2024 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
Expand Down Expand Up @@ -31,18 +32,18 @@ AC_DEFUN([gl_VISIBILITY],
dnl user has put into $CC $CFLAGS $CPPFLAGS.
AC_CACHE_CHECK([whether the -Werror option is usable],
[gl_cv_cc_vis_werror],
[gl_save_CFLAGS="$CFLAGS"
[gl_saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[]], [[]])],
[gl_cv_cc_vis_werror=yes],
[gl_cv_cc_vis_werror=no])
CFLAGS="$gl_save_CFLAGS"
CFLAGS="$gl_saved_CFLAGS"
])
dnl Now check whether visibility declarations are supported.
AC_CACHE_CHECK([for simple visibility declarations],
[gl_cv_cc_visibility],
[gl_save_CFLAGS="$CFLAGS"
[gl_saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fvisibility=hidden"
dnl We use the option -Werror and a function dummyfunc, because on some
dnl platforms (Cygwin 1.7) the use of -fvisibility triggers a warning
Expand All @@ -68,7 +69,7 @@ AC_DEFUN([gl_VISIBILITY],
[[]])],
[gl_cv_cc_visibility=yes],
[gl_cv_cc_visibility=no])
CFLAGS="$gl_save_CFLAGS"
CFLAGS="$gl_saved_CFLAGS"
])
if test $gl_cv_cc_visibility = yes; then
CFLAG_VISIBILITY="-fvisibility=hidden"
Expand Down