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Split autoconf macros out of aclocal.m4

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@9470 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
jagapen 2001-03-21 23:11:49 +00:00
parent af46212b24
commit ffa79f407d
6 changed files with 204 additions and 0 deletions
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40
config/objc-con-autoload.m4 Normal file
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@ -0,0 +1,40 @@
AC_DEFUN(OBJC_CON_AUTOLOAD,
#--------------------------------------------------------------------
# Guess if we are using a object file format that supports automatic
# loading of constructor functions.
#
# If this system supports autoloading of constructors, that means that gcc
# doesn't have to do it for us via collect2. This routine tests for this
# in a very roundabout way by compiling a program with a constructor and
# testing the file, via nm, for certain symbols that collect2 includes to
# handle loading of constructors.
#
# Makes the following substitutions:
# Defines CON_AUTOLOAD (whether constructor functions are autoloaded)
#--------------------------------------------------------------------
[dnl
AC_MSG_CHECKING(loading of constructor functions)
AC_CACHE_VAL(objc_cv_con_autoload,
[dnl
cat > conftest.constructor.c <<EOF
void cons_functions() __attribute__ ((constructor));
void cons_functions() {}
int main()
{
return 0;
}
EOF
${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.constructor.$ac_ext $LIBS 1>&5
if test -n "`nm conftest | grep _ctors_aux`"; then
objc_cv_con_autoload=yes
else
objc_cv_con_autoload=no
fi
])
if test $objc_cv_con_autoload = yes; then
AC_MSG_RESULT(yes)
AC_DEFINE(CON_AUTOLOAD)
else
AC_MSG_RESULT(no)
fi
])