File expat-visibility.patch of Package expat.7212
Index: expat-2.1.0/configure.in
===================================================================
--- expat-2.1.0.orig/configure.in
+++ expat-2.1.0/configure.in
@@ -53,15 +53,19 @@ AC_CONFIG_HEADER(expat_config.h)
sinclude(conftools/ac_c_bigendian_cross.m4)
-AC_LIBTOOL_WIN32_DLL
-AC_PROG_LIBTOOL
+sinclude(conftools/visibility.m4)
AC_SUBST(LIBCURRENT)
AC_SUBST(LIBREVISION)
AC_SUBST(LIBAGE)
dnl Checks for programs.
-AC_PROG_CC
+AC_PROG_CC_STDC
+AC_USE_SYSTEM_EXTENSIONS
+AC_SYS_LARGEFILE
+gl_VISIBILITY
+AC_LIBTOOL_WIN32_DLL
+AC_PROG_LIBTOOL
AC_PROG_CXX
AC_PROG_INSTALL
Index: expat-2.1.0/conftools/visibility.m4
===================================================================
--- /dev/null
+++ expat-2.1.0/conftools/visibility.m4
@@ -0,0 +1,77 @@
+# visibility.m4 serial 4 (gettext-0.18.2)
+dnl Copyright (C) 2005, 2008, 2010-2011 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 MacOS 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 $gl_cv_cc_visibility = yes; then
+ CFLAG_VISIBILITY="-fvisibility=hidden -DXML_HAVE_VISIBILITY=1"
+ HAVE_VISIBILITY=1
+ fi
+ fi
+ AC_SUBST([CFLAG_VISIBILITY])
+ AC_SUBST([HAVE_VISIBILITY])
+ AC_DEFINE_UNQUOTED([HAVE_VISIBILITY], [$HAVE_VISIBILITY],
+ [Define to 1 or 0, depending whether the compiler supports simple visibility declarations.])
+])
Index: expat-2.1.0/lib/expat_external.h
===================================================================
--- expat-2.1.0.orig/lib/expat_external.h
+++ expat-2.1.0/lib/expat_external.h
@@ -65,6 +65,9 @@
#endif
#endif /* not defined XML_STATIC */
+#if XML_HAVE_VISIBILITY
+#define XMLIMPORT __attribute__ ((visibility ("default")))
+#endif
/* If we didn't define it above, define it away: */
#ifndef XMLIMPORT
Index: expat-2.1.0/Makefile.in
===================================================================
--- expat-2.1.0.orig/Makefile.in
+++ expat-2.1.0/Makefile.in
@@ -114,11 +114,12 @@ CPPFLAGS = @CPPFLAGS@ -DHAVE_EXPAT_CONFI
CFLAGS = @CFLAGS@
CXXFLAGS = @CXXFLAGS@
VSNFLAG = -version-info @LIBCURRENT@:@LIBREVISION@:@LIBAGE@
+CFLAG_VISIBILITY=@CFLAG_VISIBILITY@
### autoconf this?
LTFLAGS = --silent
-COMPILE = $(CC) $(INCLUDES) $(CFLAGS) $(DEFS) $(CPPFLAGS)
+COMPILE = $(CC) $(CFLAG_VISIBILITY) $(INCLUDES) $(CFLAGS) $(DEFS) $(CPPFLAGS)
CXXCOMPILE = $(CXX) $(INCLUDES) $(CXXFLAGS) $(DEFS) $(CPPFLAGS)
LTCOMPILE = $(LIBTOOL) $(LTFLAGS) --mode=compile $(COMPILE)
LINK_LIB = $(LIBTOOL) $(LTFLAGS) --mode=link $(COMPILE) -no-undefined $(VSNFLAG) -rpath $(libdir) $(LDFLAGS) -o $@
