1178825Sdfrdnl $Id: have-pragma-weak.m4 15435 2005-06-16 19:45:52Z lha $ 255682Smarkmdnl 3127808SnectarAC_DEFUN([AC_HAVE_PRAGMA_WEAK], [ 455682Smarkmif test "${enable_shared}" = "yes"; then 555682SmarkmAC_MSG_CHECKING(for pragma weak) 655682SmarkmAC_CACHE_VAL(ac_have_pragma_weak, [ 755682Smarkmac_have_pragma_weak=no 855682Smarkmcat > conftest_foo.$ac_ext <<'EOF' 955682Smarkm[#]line __oline__ "configure" 1055682Smarkm#include "confdefs.h" 1155682Smarkm#pragma weak foo = _foo 1255682Smarkmint _foo = 17; 1355682SmarkmEOF 1455682Smarkmcat > conftest_bar.$ac_ext <<'EOF' 1555682Smarkm[#]line __oline__ "configure" 1655682Smarkm#include "confdefs.h" 1755682Smarkmextern int foo; 1855682Smarkm 19178825Sdfrint t(void) { 2055682Smarkm return foo; 2155682Smarkm} 2255682Smarkm 23178825Sdfrint main(int argc, char **argv) { 2455682Smarkm return t(); 2555682Smarkm} 2655682SmarkmEOF 2755682Smarkmif AC_TRY_EVAL('CC -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest_foo.$ac_ext conftest_bar.$ac_ext 1>&AC_FD_CC'); then 2855682Smarkmac_have_pragma_weak=yes 2955682Smarkmfi 3055682Smarkmrm -rf conftest* 3155682Smarkm]) 3255682Smarkmif test "$ac_have_pragma_weak" = "yes"; then 3355682Smarkm AC_DEFINE(HAVE_PRAGMA_WEAK, 1, [Define this if your compiler supports \`#pragma weak.'])dnl 3455682Smarkmfi 3555682SmarkmAC_MSG_RESULT($ac_have_pragma_weak) 3655682Smarkmfi 3755682Smarkm]) 38