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https://github.com/varun-r-mallya/sysprof.git
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29c4ec495f
This is a major redesign a modernization of Sysprof. The core data structures and design are largely the same, but it has been ported to Gtk3 and has lots of additions that should make your profiling experience smoother. Especially for those that are new to profiling. There are some very simple help docs added, but we really need the experts to come in and write some documentation here.
78 lines
3.3 KiB
Plaintext
78 lines
3.3 KiB
Plaintext
# visibility.m4 serial 5 (gettext-0.18.2)
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dnl Copyright (C) 2005, 2008, 2010-2015 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl From Bruno Haible.
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dnl Tests whether the compiler supports the command-line option
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dnl -fvisibility=hidden and the function and variable attributes
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dnl __attribute__((__visibility__("hidden"))) and
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dnl __attribute__((__visibility__("default"))).
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dnl Does *not* test for __visibility__("protected") - which has tricky
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dnl semantics (see the 'vismain' test in glibc) and does not exist e.g. on
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dnl Mac OS X.
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dnl Does *not* test for __visibility__("internal") - which has processor
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dnl dependent semantics.
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dnl Does *not* test for #pragma GCC visibility push(hidden) - which is
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dnl "really only recommended for legacy code".
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dnl Set the variable CFLAG_VISIBILITY.
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dnl Defines and sets the variable HAVE_VISIBILITY.
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AC_DEFUN([gl_VISIBILITY],
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[
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AC_REQUIRE([AC_PROG_CC])
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CFLAG_VISIBILITY=
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HAVE_VISIBILITY=0
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if test -n "$GCC"; then
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dnl First, check whether -Werror can be added to the command line, or
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dnl whether it leads to an error because of some other option that the
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dnl user has put into $CC $CFLAGS $CPPFLAGS.
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AC_MSG_CHECKING([whether the -Werror option is usable])
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AC_CACHE_VAL([gl_cv_cc_vis_werror], [
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gl_save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Werror"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([[]], [[]])],
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[gl_cv_cc_vis_werror=yes],
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[gl_cv_cc_vis_werror=no])
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CFLAGS="$gl_save_CFLAGS"])
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AC_MSG_RESULT([$gl_cv_cc_vis_werror])
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dnl Now check whether visibility declarations are supported.
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AC_MSG_CHECKING([for simple visibility declarations])
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AC_CACHE_VAL([gl_cv_cc_visibility], [
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gl_save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -fvisibility=hidden"
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dnl We use the option -Werror and a function dummyfunc, because on some
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dnl platforms (Cygwin 1.7) the use of -fvisibility triggers a warning
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dnl "visibility attribute not supported in this configuration; ignored"
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dnl at the first function definition in every compilation unit, and we
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dnl don't want to use the option in this case.
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if test $gl_cv_cc_vis_werror = yes; then
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CFLAGS="$CFLAGS -Werror"
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fi
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[[extern __attribute__((__visibility__("hidden"))) int hiddenvar;
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extern __attribute__((__visibility__("default"))) int exportedvar;
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extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
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extern __attribute__((__visibility__("default"))) int exportedfunc (void);
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void dummyfunc (void) {}
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]],
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[[]])],
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[gl_cv_cc_visibility=yes],
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[gl_cv_cc_visibility=no])
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CFLAGS="$gl_save_CFLAGS"])
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AC_MSG_RESULT([$gl_cv_cc_visibility])
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if test $gl_cv_cc_visibility = yes; then
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CFLAG_VISIBILITY="-fvisibility=hidden"
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HAVE_VISIBILITY=1
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fi
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fi
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AC_SUBST([CFLAG_VISIBILITY])
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AC_SUBST([HAVE_VISIBILITY])
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AC_DEFINE_UNQUOTED([HAVE_VISIBILITY], [$HAVE_VISIBILITY],
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[Define to 1 or 0, depending whether the compiler supports simple visibility declarations.])
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])
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