From 2e969c1eebe657e1b57a2e5ee2aa11f300e9fd5f Mon Sep 17 00:00:00 2001 From: "jan.nijtmans" Date: Tue, 19 Nov 2013 11:53:32 +0000 Subject: Revert [3eaa6c984a] (Enh [http://core.tcl.tk/tcl/info/2959069|2959069]), as it turns out that -fvisibility=hidden only affects definitions and not declarations. Therefore explicitely declaring each MODULE_SCOPE function as __attribute__((__visibility__("hidden")) is much better. Suggested by Stuart Cassoff (Thanks!). --- unix/configure | 89 +++++----------------------------------------------------- unix/tcl.m4 | 52 +++++++++++----------------------- win/tcl.m4 | 2 +- 3 files changed, 24 insertions(+), 119 deletions(-) diff --git a/unix/configure b/unix/configure index a3888e3..d098588 100755 --- a/unix/configure +++ b/unix/configure @@ -1449,9 +1449,9 @@ echo "$as_me: error: ${with_tclconfig} directory doesn't contain tclConfig.sh" > `ls -dr ${srcdir}/../tcl[8-9].[0-9] 2>/dev/null` \ `ls -dr ${srcdir}/../tcl[8-9].[0-9]* 2>/dev/null` ; do if test -f "$i/unix/tclConfig.sh" ; then - ac_cv_c_tclconfig="`(cd $i/unix; pwd)`" - break - fi + ac_cv_c_tclconfig="`(cd $i/unix; pwd)`" + break + fi done fi @@ -4335,80 +4335,6 @@ if test "${tcl_cv_cc_visibility_hidden+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else - if test "$SHARED_BUILD" = 1; then - - hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -fvisibility=hidden -Werror" - cat >conftest.$ac_ext <<_ACEOF -/* confdefs.h. */ -_ACEOF -cat confdefs.h >>conftest.$ac_ext -cat >>conftest.$ac_ext <<_ACEOF -/* end confdefs.h. */ - -int -main () -{ -#if !defined(__GNUC__) || __GNUC__ < 4 -#error visibility hidden is not supported for this compiler -#endif - - ; - return 0; -} -_ACEOF -rm -f conftest.$ac_objext -if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 - (eval $ac_compile) 2>conftest.er1 - ac_status=$? - grep -v '^ *+' conftest.er1 >conftest.err - rm -f conftest.er1 - cat conftest.err >&5 - echo "$as_me:$LINENO: \$? = $ac_status" >&5 - (exit $ac_status); } && - { ac_try='test -z "$ac_c_werror_flag" - || test ! -s conftest.err' - { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 - (eval $ac_try) 2>&5 - ac_status=$? - echo "$as_me:$LINENO: \$? = $ac_status" >&5 - (exit $ac_status); }; } && - { ac_try='test -s conftest.$ac_objext' - { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 - (eval $ac_try) 2>&5 - ac_status=$? - echo "$as_me:$LINENO: \$? = $ac_status" >&5 - (exit $ac_status); }; }; then - tcl_cv_cc_visibility_hidden=yes -else - echo "$as_me: failed program was:" >&5 -sed 's/^/| /' conftest.$ac_ext >&5 - -tcl_cv_cc_visibility_hidden=no -fi -rm -f conftest.err conftest.$ac_objext conftest.$ac_ext - CFLAGS=$hold_cflags - -else - - tcl_cv_cc_visibility_hidden=no - -fi - - -fi -echo "$as_me:$LINENO: result: $tcl_cv_cc_visibility_hidden" >&5 -echo "${ECHO_T}$tcl_cv_cc_visibility_hidden" >&6 - if test $tcl_cv_cc_visibility_hidden = yes; then - - CFLAGS="$CFLAGS -fvisibility=hidden" - -cat >>confdefs.h <<\_ACEOF -#define MODULE_SCOPE extern -_ACEOF - - -else - hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror" cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ @@ -4459,7 +4385,10 @@ fi rm -f conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext CFLAGS=$hold_cflags - if test $tcl_cv_cc_visibility_hidden = yes; then +fi +echo "$as_me:$LINENO: result: $tcl_cv_cc_visibility_hidden" >&5 +echo "${ECHO_T}$tcl_cv_cc_visibility_hidden" >&6 + if test $tcl_cv_cc_visibility_hidden = yes; then cat >>confdefs.h <<\_ACEOF @@ -4475,9 +4404,6 @@ _ACEOF fi -fi - - # Step 0.d: Disable -rpath support? echo "$as_me:$LINENO: checking if rpath support is requested" >&5 @@ -5995,7 +5921,6 @@ cat >>confdefs.h <<\_ACEOF #define MODULE_SCOPE __private_extern__ _ACEOF - tcl_cv_cc_visibility_hidden=yes fi diff --git a/unix/tcl.m4 b/unix/tcl.m4 index 070946a..8c29334 100644 --- a/unix/tcl.m4 +++ b/unix/tcl.m4 @@ -111,9 +111,9 @@ AC_DEFUN([SC_PATH_TCLCONFIG], [ `ls -dr ${srcdir}/../tcl[[8-9]].[[0-9]] 2>/dev/null` \ `ls -dr ${srcdir}/../tcl[[8-9]].[[0-9]]* 2>/dev/null` ; do if test -f "$i/unix/tclConfig.sh" ; then - ac_cv_c_tclconfig="`(cd $i/unix; pwd)`" - break - fi + ac_cv_c_tclconfig="`(cd $i/unix; pwd)`" + break + fi done fi ]) @@ -271,11 +271,10 @@ AC_DEFUN([SC_PATH_TKCONFIG], [ # # Results: # -# Subst the following vars: +# Substitutes the following vars: # TCL_BIN_DIR # TCL_SRC_DIR # TCL_LIB_FILE -# #------------------------------------------------------------------------ AC_DEFUN([SC_LOAD_TCLCONFIG], [ @@ -439,11 +438,11 @@ AC_DEFUN([SC_LOAD_TKCONFIG], [ # extension can't assume that an executable Tcl shell exists at # build time. # -# Arguments +# Arguments: # none # -# Results -# Subst's the following values: +# Results: +# Substitutes the following vars: # TCLSH_PROG #------------------------------------------------------------------------ @@ -484,11 +483,11 @@ AC_DEFUN([SC_PROG_TCLSH], [ # when running tests from an extension build directory. It is not # correct to use the TCLSH_PROG in cases like this. # -# Arguments +# Arguments: # none # -# Results -# Subst's the following values: +# Results: +# Substitutes the following values: # BUILD_TCLSH #------------------------------------------------------------------------ @@ -790,7 +789,6 @@ AC_DEFUN([SC_ENABLE_SYMBOLS], [ # # Defines the following vars: # HAVE_LANGINFO Triggers use of nl_langinfo if defined. -# #------------------------------------------------------------------------ AC_DEFUN([SC_ENABLE_LANGINFO], [ @@ -1045,34 +1043,17 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [ AC_CACHE_CHECK([if compiler supports visibility "hidden"], tcl_cv_cc_visibility_hidden, [ - AS_IF([test "$SHARED_BUILD" = 1], [ - hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -fvisibility=hidden -Werror" - AC_TRY_COMPILE(,[#if !defined(__GNUC__) || __GNUC__ < 4 -#error visibility hidden is not supported for this compiler -#endif - ], tcl_cv_cc_visibility_hidden=yes, - tcl_cv_cc_visibility_hidden=no) - CFLAGS=$hold_cflags - ], [ - tcl_cv_cc_visibility_hidden=no - ]) - ]) - AS_IF([test $tcl_cv_cc_visibility_hidden = yes], [ - CFLAGS="$CFLAGS -fvisibility=hidden" - AC_DEFINE(MODULE_SCOPE, [extern], [No need to mark inidividual symbols as hidden]) - ], [ hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror" AC_TRY_LINK([ extern __attribute__((__visibility__("hidden"))) void f(void); void f(void) {}], [f();], tcl_cv_cc_visibility_hidden=yes, tcl_cv_cc_visibility_hidden=no) - CFLAGS=$hold_cflags - AS_IF([test $tcl_cv_cc_visibility_hidden = yes], [ - AC_DEFINE(MODULE_SCOPE, - [extern __attribute__((__visibility__("hidden")))], - [Compiler support for module scope symbols]) - AC_DEFINE(HAVE_HIDDEN, [1], [Compiler support for module scope symbols]) - ]) + CFLAGS=$hold_cflags]) + AS_IF([test $tcl_cv_cc_visibility_hidden = yes], [ + AC_DEFINE(MODULE_SCOPE, + [extern __attribute__((__visibility__("hidden")))], + [Compiler support for module scope symbols]) + AC_DEFINE(HAVE_HIDDEN, [1], [Compiler support for module scope symbols]) ]) # Step 0.d: Disable -rpath support? @@ -1645,7 +1626,6 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [ AS_IF([test "$tcl_cv_cc_visibility_hidden" != yes], [ AC_DEFINE(MODULE_SCOPE, [__private_extern__], [Compiler support for module scope symbols]) - tcl_cv_cc_visibility_hidden=yes ]) CC_SEARCH_FLAGS="" LD_SEARCH_FLAGS="" diff --git a/win/tcl.m4 b/win/tcl.m4 index 52c001f..625c329 100644 --- a/win/tcl.m4 +++ b/win/tcl.m4 @@ -247,7 +247,7 @@ AC_DEFUN([SC_PATH_TKCONFIG], [ # # Results: # -# Subst the following vars: +# Substitutes the following vars: # TCL_BIN_DIR # TCL_SRC_DIR # TCL_LIB_FILE -- cgit v0.12