0f9fae28d8
NOT FOR 12.1, Factory Only. - Hide non public symbols reusing existing win32 API export/imports - annotate malloc/realloc-like functions with attribute alloc_size to catch possible misuses in calling code. OBS-URL: https://build.opensuse.org/request/show/89779 OBS-URL: https://build.opensuse.org/package/show/devel:libraries:c_c++/expat?expand=0&rev=16
136 lines
4.8 KiB
Diff
136 lines
4.8 KiB
Diff
--- /dev/null
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+++ conftools/visibility.m4
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@@ -0,0 +1,77 @@
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+# visibility.m4 serial 4 (gettext-0.18.2)
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+dnl Copyright (C) 2005, 2008, 2010-2011 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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+
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+dnl From Bruno Haible.
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+
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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 MacOS 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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+
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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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--- configure.in.orig
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+++ configure.in
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@@ -52,17 +52,20 @@ AC_CONFIG_HEADER(expat_config.h)
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sinclude(conftools/libtool.m4)
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sinclude(conftools/ac_c_bigendian_cross.m4)
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-
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-AC_LIBTOOL_WIN32_DLL
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-AC_PROG_LIBTOOL
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+sinclude(conftools/visibility.m4)
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AC_SUBST(LIBCURRENT)
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AC_SUBST(LIBREVISION)
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AC_SUBST(LIBAGE)
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dnl Checks for programs.
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-AC_PROG_CC
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+AC_PROG_CC_STDC
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+AC_USE_SYSTEM_EXTENSIONS
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+AC_SYS_LARGEFILE
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AC_PROG_INSTALL
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+gl_VISIBILITY
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+AC_LIBTOOL_WIN32_DLL
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+AC_PROG_LIBTOOL
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if test "$GCC" = yes ; then
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dnl
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--- lib/expat_external.h.orig
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+++ lib/expat_external.h
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@@ -65,6 +65,9 @@
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#endif
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#endif /* not defined XML_STATIC */
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+#if HAVE_VISIBILITY
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+#define XMLIMPORT __attribute__ ((visibility ("default")))
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+#endif
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/* If we didn't define it above, define it away: */
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#ifndef XMLIMPORT
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--- Makefile.in.orig
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+++ Makefile.in
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@@ -110,11 +110,11 @@ CPPFLAGS = @CPPFLAGS@ -DHAVE_EXPAT_CONFI
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CFLAGS = @CFLAGS@
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CXXFLAGS = @CXXFLAGS@
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VSNFLAG = -version-info @LIBCURRENT@:@LIBREVISION@:@LIBAGE@
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-
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+CFLAG_VISIBILITY = @CFLAG_VISIBILITY@
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### autoconf this?
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LTFLAGS = --silent
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-COMPILE = $(CC) $(INCLUDES) $(CFLAGS) $(DEFS) $(CPPFLAGS)
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+COMPILE = $(CC) $(CFLAG_VISIBILITY) $(INCLUDES) $(CFLAGS) $(DEFS) $(CPPFLAGS)
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CXXCOMPILE = $(CXX) $(INCLUDES) $(CXXFLAGS) $(DEFS) $(CPPFLAGS)
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LTCOMPILE = $(LIBTOOL) $(LTFLAGS) --mode=compile $(COMPILE)
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LINK_LIB = $(LIBTOOL) $(LTFLAGS) --mode=link $(COMPILE) -no-undefined $(VSNFLAG) -rpath $(libdir) $(LDFLAGS) -o $@
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