diff options
Diffstat (limited to 'm4/curl-confopts.m4')
| -rw-r--r-- | m4/curl-confopts.m4 | 77 |
1 files changed, 75 insertions, 2 deletions
diff --git a/m4/curl-confopts.m4 b/m4/curl-confopts.m4 index 9d4315626..f335b7a60 100644 --- a/m4/curl-confopts.m4 +++ b/m4/curl-confopts.m4 @@ -5,7 +5,7 @@ # | (__| |_| | _ <| |___ # \___|\___/|_| \_\_____| # -# Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al. +# Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al. # # This software is licensed as described in the file COPYING, which # you should have received as part of this distribution. The terms @@ -21,7 +21,7 @@ #*************************************************************************** # File version for 'aclocal' use. Keep it a single number. -# serial 16 +# serial 17 dnl CURL_CHECK_OPTION_THREADED_RESOLVER dnl ------------------------------------------------- @@ -258,6 +258,50 @@ AC_HELP_STRING([--disable-optimize],[Disable compiler optimizations]), ]) +dnl CURL_CHECK_OPTION_SYMBOL_HIDING +dnl ------------------------------------------------- +dnl Verify if configure has been invoked with option +dnl --enable-symbol-hiding or --disable-symbol-hiding, +dnl setting shell variable want_symbol_hiding value. + +AC_DEFUN([CURL_CHECK_OPTION_SYMBOL_HIDING], [ + AC_BEFORE([$0],[CURL_CHECK_COMPILER_SYMBOL_HIDING])dnl + AC_MSG_CHECKING([whether to enable hiding of library internal symbols]) + OPT_SYMBOL_HIDING="default" + AC_ARG_ENABLE(symbol-hiding, +AC_HELP_STRING([--enable-symbol-hiding],[Enable hiding of library internal symbols]) +AC_HELP_STRING([--disable-symbol-hiding],[Disable hiding of library internal symbols]), + OPT_SYMBOL_HIDING=$enableval) + AC_ARG_ENABLE(hidden-symbols, +AC_HELP_STRING([--enable-hidden-symbols],[To be deprecated, use --enable-symbol-hiding]) +AC_HELP_STRING([--disable-hidden-symbols],[To be deprecated, use --disable-symbol-hiding]), + OPT_SYMBOL_HIDING=$enableval) + case "$OPT_SYMBOL_HIDING" in + no) + dnl --disable-symbol-hiding option used. + dnl This is an indication to not attempt hiding of library internal + dnl symbols. Default symbol visibility will be used, which normally + dnl exposes all library internal symbols. + want_symbol_hiding="no" + AC_MSG_RESULT([no]) + ;; + default) + dnl configure's symbol-hiding option not specified. + dnl Handle this as if --enable-symbol-hiding option was given. + want_symbol_hiding="yes" + AC_MSG_RESULT([yes]) + ;; + *) + dnl --enable-symbol-hiding option used. + dnl This is an indication to attempt hiding of library internal + dnl symbols. This is only supported on some compilers/linkers. + want_symbol_hiding="yes" + AC_MSG_RESULT([yes]) + ;; + esac +]) + + dnl CURL_CHECK_OPTION_THREADS dnl ------------------------------------------------- dnl Verify if configure has been invoked with option @@ -411,6 +455,35 @@ AC_DEFUN([CURL_CHECK_NONBLOCKING_SOCKET], [ ]) +dnl CURL_CONFIGURE_SYMBOL_HIDING +dnl ------------------------------------------------- +dnl Depending on --enable-symbol-hiding or --disable-symbol-hiding +dnl configure option, and compiler capability to actually honor such +dnl option, this will modify compiler flags as appropriate and also +dnl provide needed definitions for configuration and Makefile.am files. +dnl This macro should not be used until all compilation tests have +dnl been done to prevent interferences on other tests. + +AC_DEFUN([CURL_CONFIGURE_SYMBOL_HIDING], [ + AC_MSG_CHECKING([whether hiding of library internal symbols will actually happen]) + CFLAG_SYMBOL_HIDING="" + doing_symbol_hiding="no" + if test x"$ac_cv_native_windows" != "xyes" && + test "$want_symbol_hiding" = "yes" && + test "$supports_symbol_hiding" = "yes"; then + doing_symbol_hiding="yes" + CFLAG_SYMBOL_HIDING="$symbol_hiding_CFLAGS" + AC_DEFINE_UNQUOTED(CURL_EXTERN_SYMBOL, $symbol_hiding_EXTERN, + [Definition to make a library symbol externally visible.]) + AC_MSG_RESULT([yes]) + else + AC_MSG_RESULT([no]) + fi + AM_CONDITIONAL(DOING_SYMBOL_HIDING, test x$doing_symbol_hiding = xyes) + AC_SUBST(CFLAG_SYMBOL_HIDING) +]) + + dnl CURL_CHECK_LIB_ARES dnl ------------------------------------------------- dnl When c-ares library support has been requested, |