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100 lines
3.2 KiB
100 lines
3.2 KiB
dnl Copyright (C) 1993-2002 Free Software Foundation, Inc.
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dnl This file is free software, distributed under the terms of the GNU
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dnl General Public License. As a special exception to the GNU General
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dnl Public License, this file may be distributed as part of a program
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dnl that contains a configuration script generated by Autoconf, under
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dnl the same distribution terms as the rest of that program.
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dnl From Bruno Haible, Marcus Daniels.
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AC_PREREQ(2.13)
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AC_DEFUN([CL_GLOBAL_CONSTRUCTORS],
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[AC_REQUIRE([CL_AS_UNDERSCORE])dnl
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if test -n "$GCC"; then
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AC_CACHE_CHECK(for the global constructors function prefix,
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cl_cv_cplusplus_ctorprefix, [
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cat > conftest.cc << EOF
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struct foo { foo (); };
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foo foobar;
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EOF
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# look for the assembly language name in the .s file
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AC_TRY_COMMAND(${CXX-g++} $CXXFLAGS -S conftest.cc) >/dev/null 2>&1
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if grep '_GLOBAL_\$I\$foobar' conftest.s >/dev/null ; then
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cl_cv_cplusplus_ctorprefix='_GLOBAL_$I$'
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else
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if grep '_GLOBAL_\.I\.foobar' conftest.s >/dev/null ; then
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cl_cv_cplusplus_ctorprefix='_GLOBAL_.I.'
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else
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if grep '_GLOBAL__I_foobar' conftest.s >/dev/null ; then
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cl_cv_cplusplus_ctorprefix='_GLOBAL__I_'
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else
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cl_cv_cplusplus_ctorprefix=unknown
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fi
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fi
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fi
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rm -f conftest*
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])
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if test "$cl_cv_cplusplus_ctorprefix" '!=' unknown; then
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ac_value='"'"$cl_cv_cplusplus_ctorprefix"'"'
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AC_DEFINE_UNQUOTED(CL_GLOBAL_CONSTRUCTOR_PREFIX,$ac_value)
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AC_CACHE_CHECK(for the global destructors function prefix,
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cl_cv_cplusplus_dtorprefix, [
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cat > conftest.cc << EOF
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struct foo { foo (); ~ foo (); };
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foo foobar;
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EOF
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# look for the assembly language name in the .s file
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AC_TRY_COMMAND(${CXX-g++} $CXXFLAGS -S conftest.cc) >/dev/null 2>&1
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if grep '_GLOBAL_\$D\$foobar' conftest.s >/dev/null ; then
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cl_cv_cplusplus_dtorprefix='_GLOBAL_$D$'
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else
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if grep '_GLOBAL_\.D\.foobar' conftest.s >/dev/null ; then
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cl_cv_cplusplus_dtorprefix='_GLOBAL_.D.'
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else
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if grep '_GLOBAL__D_foobar' conftest.s >/dev/null ; then
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cl_cv_cplusplus_dtorprefix='_GLOBAL__D_'
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else
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cl_cv_cplusplus_dtorprefix=none
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fi
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fi
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fi
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rm -f conftest*
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])
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if test "$cl_cv_cplusplus_dtorprefix" '!=' none; then
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ac_value='"'"$cl_cv_cplusplus_ctorprefix"'"'
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AC_DEFINE_UNQUOTED(CL_GLOBAL_DESTRUCTOR_PREFIX,$ac_value)
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fi
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dnl Check whether the global constructors/destructors functions are file-scope
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dnl only by default. This is the case in egcs-1.1.2 or newer.
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AC_CACHE_CHECK(whether the global constructors function need to be exported,
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cl_cv_cplusplus_ctorexport, [
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cat > conftest1.cc << EOF
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struct foo { foo (); };
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foo foobar;
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EOF
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cat > conftest2.cc << EOF
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#include "confdefs.h"
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#ifdef ASM_UNDERSCORE
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#define ASM_UNDERSCORE_PREFIX "_"
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#else
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#define ASM_UNDERSCORE_PREFIX ""
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#endif
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struct foo { foo (); };
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foo::foo () {}
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extern "C" void ctor (void) __asm__ (ASM_UNDERSCORE_PREFIX CL_GLOBAL_CONSTRUCTOR_PREFIX "foobar");
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int main() { ctor(); return 0; }
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EOF
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if AC_TRY_COMMAND(${CXX-g++} -o conftest${ac_exeext} $CXXFLAGS $CPPFLAGS $LDFLAGS conftest1.cc conftest2.cc $LIBS 1>&5) >/dev/null 2>&1 && test -s conftest${ac_exeext}; then
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cl_cv_cplusplus_ctorexport=no
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else
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cl_cv_cplusplus_ctorexport=yes
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fi
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rm -f conftest*
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])
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if test "$cl_cv_cplusplus_ctorexport" = yes; then
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AC_DEFINE(CL_NEED_GLOBALIZE_CTORDTOR)
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fi
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fi
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fi
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])
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