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NAME	SIZE	ACTIONS
📄 bison-i18n.m4	1,924 B	[ EDIT ] \| [ DEL ]
📄 codeset.m4	842 B	[ EDIT ] \| [ DEL ]
📄 dovecot-pigeonhole.m4	1,895 B	[ EDIT ] \| [ DEL ]
📄 extern-inline.m4	4,368 B	[ EDIT ] \| [ DEL ]
📄 fcntl-o.m4	4,668 B	[ EDIT ] \| [ DEL ]
📄 fontutil.m4	14,160 B	[ EDIT ] \| [ DEL ]
📄 freetype2.m4	6,333 B	[ EDIT ] \| [ DEL ]
📄 gettext.m4	15,859 B	[ EDIT ] \| [ DEL ]
📄 glibc2.m4	830 B	[ EDIT ] \| [ DEL ]
📄 glibc21.m4	907 B	[ EDIT ] \| [ DEL ]
📄 gpg-error.m4	4,757 B	[ EDIT ] \| [ DEL ]
📄 gpgrt.m4	4,717 B	[ EDIT ] \| [ DEL ]
📄 iconv.m4	9,274 B	[ EDIT ] \| [ DEL ]
📄 intdiv0.m4	2,411 B	[ EDIT ] \| [ DEL ]
📄 intl.m4	12,120 B	[ EDIT ] \| [ DEL ]
📄 intldir.m4	917 B	[ EDIT ] \| [ DEL ]
📄 intlmacosx.m4	2,533 B	[ EDIT ] \| [ DEL ]
📄 intmax.m4	1,123 B	[ EDIT ] \| [ DEL ]
📄 inttypes-pri.m4	1,253 B	[ EDIT ] \| [ DEL ]
📄 inttypes_h.m4	1,020 B	[ EDIT ] \| [ DEL ]
📄 lcmessage.m4	1,365 B	[ EDIT ] \| [ DEL ]
📄 lib-ld.m4	3,683 B	[ EDIT ] \| [ DEL ]
📄 lib-link.m4	33,059 B	[ EDIT ] \| [ DEL ]
📄 lib-prefix.m4	8,466 B	[ EDIT ] \| [ DEL ]
📄 libgcrypt.m4	6,237 B	[ EDIT ] \| [ DEL ]
📄 libtool.m4	305,862 B	[ EDIT ] \| [ DEL ]
📄 libxml.m4	7,881 B	[ EDIT ] \| [ DEL ]
📄 libxslt.m4	8,119 B	[ EDIT ] \| [ DEL ]
📄 lock.m4	1,463 B	[ EDIT ] \| [ DEL ]
📄 longlong.m4	4,739 B	[ EDIT ] \| [ DEL ]
📄 ltargz.m4	2,569 B	[ EDIT ] \| [ DEL ]
📄 ltdl.m4	30,030 B	[ EDIT ] \| [ DEL ]
📄 ltoptions.m4	14,514 B	[ EDIT ] \| [ DEL ]
📄 ltsugar.m4	4,384 B	[ EDIT ] \| [ DEL ]
📄 ltversion.m4	699 B	[ EDIT ] \| [ DEL ]
📄 lt~obsolete.m4	6,140 B	[ EDIT ] \| [ DEL ]
📄 mysql.m4	4,221 B	[ EDIT ] \| [ DEL ]
📄 nls.m4	1,223 B	[ EDIT ] \| [ DEL ]
📄 pkg.m4	12,670 B	[ EDIT ] \| [ DEL ]
📄 po.m4	18,969 B	[ EDIT ] \| [ DEL ]
📄 printf-posix.m4	1,579 B	[ EDIT ] \| [ DEL ]
📄 progtest.m4	3,092 B	[ EDIT ] \| [ DEL ]
📄 size_max.m4	3,064 B	[ EDIT ] \| [ DEL ]
📄 stdint_h.m4	995 B	[ EDIT ] \| [ DEL ]
📄 threadlib.m4	15,151 B	[ EDIT ] \| [ DEL ]
📄 uintmax_t.m4	1,113 B	[ EDIT ] \| [ DEL ]
📄 visibility.m4	3,351 B	[ EDIT ] \| [ DEL ]
📄 wchar_t.m4	818 B	[ EDIT ] \| [ DEL ]
📄 wint_t.m4	1,053 B	[ EDIT ] \| [ DEL ]
📄 xsize.m4	406 B	[ EDIT ] \| [ DEL ]

[ CLOSE ]

EDIT: visibility.m4

# visibility.m4 serial 5 (gettext-0.18.2)
dnl Copyright (C) 2005, 2008, 2010-2016 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 $CPPFLAGS.
    AC_MSG_CHECKING([whether the -Werror option is usable])
    AC_CACHE_VAL([gl_cv_cc_vis_werror], [
      gl_save_CFLAGS="$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"])
    AC_MSG_RESULT([$gl_cv_cc_vis_werror])
    dnl Now check whether visibility declarations are supported.
    AC_MSG_CHECKING([for simple visibility declarations])
    AC_CACHE_VAL([gl_cv_cc_visibility], [
      gl_save_CFLAGS="$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="$gl_save_CFLAGS"])
    AC_MSG_RESULT([$gl_cv_cc_visibility])
    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.])
])