build: Remove unused and outdated .m4 file.

* gettext-runtime/m4/visibility.m4: Remove file.
* gettext-runtime/m4/Makefile.am (EXTRA_DIST): Remove it.

diff --git a/gettext-runtime/m4/Makefile.am b/gettext-runtime/m4/Makefile.am
index ce778c271e9b1be0acbb895a7dd2d8e6359115f2..8c3b3a25f2e3232ef2dcc6d650e0b5ea25690544 100644 (file)
--- a/gettext-runtime/m4/Makefile.am
+++ b/gettext-runtime/m4/Makefile.am
@@ -37,5 +37,4 @@ progtest.m4 \
 size_max.m4 \
 stdint_h.m4 \
 uintmax_t.m4 \
-visibility.m4 \
 xsize.m4

diff --git a/gettext-runtime/m4/visibility.m4 b/gettext-runtime/m4/visibility.m4
deleted file mode 100644 (file)
index 8c266a8..0000000
--- a/gettext-runtime/m4/visibility.m4
+++ /dev/null
@@ -1,77 +0,0 @@
-# visibility.m4 serial 6
-dnl Copyright (C) 2005, 2008, 2010-2019 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.
-
-dnl From Bruno Haible.
-
-dnl Tests whether the compiler supports the command-line option
-dnl -fvisibility=hidden and the function and variable attributes
-dnl __attribute__((__visibility__("hidden"))) and
-dnl __attribute__((__visibility__("default"))).
-dnl Does *not* test for __visibility__("protected") - which has tricky
-dnl semantics (see the 'vismain' test in glibc) and does not exist e.g. on
-dnl Mac OS X.
-dnl Does *not* test for __visibility__("internal") - which has processor
-dnl dependent semantics.
-dnl Does *not* test for #pragma GCC visibility push(hidden) - which is
-dnl "really only recommended for legacy code".
-dnl Set the variable CFLAG_VISIBILITY.
-dnl Defines and sets the variable HAVE_VISIBILITY.
-
-AC_DEFUN([gl_VISIBILITY],
-[
-  AC_REQUIRE([AC_PROG_CC])
-  CFLAG_VISIBILITY=
-  HAVE_VISIBILITY=0
-  if test -n "$GCC"; then
-    dnl First, check whether -Werror can be added to the command line, or
-    dnl whether it leads to an error because of some other option that the
-    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"
-       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"
-      ])
-    dnl Now check whether visibility declarations are supported.
-    AC_CACHE_CHECK([for simple visibility declarations],
-      [gl_cv_cc_visibility],
-      [gl_save_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
-       dnl "visibility attribute not supported in this configuration; ignored"
-       dnl at the first function definition in every compilation unit, and we
-       dnl don't want to use the option in this case.
-       if test $gl_cv_cc_vis_werror = yes; then
-         CFLAGS="$CFLAGS -Werror"
-       fi
-       AC_COMPILE_IFELSE(
-         [AC_LANG_PROGRAM(
-            [[extern __attribute__((__visibility__("hidden"))) int hiddenvar;
-              extern __attribute__((__visibility__("default"))) int exportedvar;
-              extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
-              extern __attribute__((__visibility__("default"))) int exportedfunc (void);
-              void dummyfunc (void) {}
-            ]],
-            [[]])],
-         [gl_cv_cc_visibility=yes],
-         [gl_cv_cc_visibility=no])
-       CFLAGS="$gl_save_CFLAGS"
-      ])
-    if test $gl_cv_cc_visibility = yes; then
-      CFLAG_VISIBILITY="-fvisibility=hidden"
-      HAVE_VISIBILITY=1
-    fi
-  fi
-  AC_SUBST([CFLAG_VISIBILITY])
-  AC_SUBST([HAVE_VISIBILITY])
-  AC_DEFINE_UNQUOTED([HAVE_VISIBILITY], [$HAVE_VISIBILITY],
-    [Define to 1 or 0, depending whether the compiler supports simple visibility declarations.])
-])