105 lines
3.6 KiB
Plaintext
105 lines
3.6 KiB
Plaintext
dnl Fix Autoconf bugs by overriding broken internal Autoconf
|
|
dnl macros with backports of fixes from newer releases.
|
|
dnl
|
|
dnl The override bits of this file should be a no-op for the newest
|
|
dnl Autoconf version, which means they can be removed once the complete
|
|
dnl tree has moved to a new enough Autoconf version.
|
|
dnl
|
|
dnl The _GCC_AUTOCONF_VERSION_TEST ensures that exactly the desired
|
|
dnl Autoconf version is used. It should be kept for consistency.
|
|
|
|
dnl Use ifdef/ifelse over m4_ifdef/m4_ifelse to be clean for 2.13.
|
|
ifdef([m4_PACKAGE_VERSION], [
|
|
|
|
dnl Provide m4_copy_force and m4_rename_force for old Autoconf versions.
|
|
|
|
m4_ifndef([m4_copy_force],
|
|
[m4_define([m4_copy_force],
|
|
[m4_ifdef([$2], [m4_undefine([$2])])m4_copy($@)])])
|
|
|
|
m4_ifndef([m4_rename_force],
|
|
[m4_define([m4_rename_force],
|
|
[m4_ifdef([$2], [m4_undefine([$2])])m4_rename($@)])])
|
|
|
|
dnl AC_DEFUN a commonly used macro so this file is picked up.
|
|
m4_copy([AC_PREREQ], [_AC_PREREQ])
|
|
AC_DEFUN([AC_PREREQ], [frob])
|
|
m4_copy_force([_AC_PREREQ], [AC_PREREQ])
|
|
|
|
|
|
dnl Ensure exactly this Autoconf version is used
|
|
m4_ifndef([_GCC_AUTOCONF_VERSION],
|
|
[m4_define([_GCC_AUTOCONF_VERSION], [2.64])])
|
|
|
|
dnl Test for the exact version when AC_INIT is expanded.
|
|
dnl This allows to update the tree in steps (for testing)
|
|
dnl by putting
|
|
dnl m4_define([_GCC_AUTOCONF_VERSION], [X.Y])
|
|
dnl in configure.ac before AC_INIT,
|
|
dnl without rewriting this file.
|
|
dnl Or for updating the whole tree at once with the definition above.
|
|
AC_DEFUN([_GCC_AUTOCONF_VERSION_CHECK],
|
|
[m4_if(m4_defn([_GCC_AUTOCONF_VERSION]),
|
|
m4_defn([m4_PACKAGE_VERSION]), [],
|
|
[m4_fatal([Please use exactly Autoconf ]_GCC_AUTOCONF_VERSION[ instead of ]m4_defn([m4_PACKAGE_VERSION])[.])])
|
|
])
|
|
m4_define([AC_INIT], m4_defn([AC_INIT])[
|
|
_GCC_AUTOCONF_VERSION_CHECK
|
|
])
|
|
|
|
|
|
dnl Ensure we do not use a buggy M4.
|
|
m4_if(m4_index([..wi.d.], [.d.]), [-1],
|
|
[m4_fatal(m4_do([m4 with buggy strstr detected. Please install
|
|
GNU M4 1.4.16 or newer and set the M4 environment variable]))])
|
|
|
|
|
|
dnl Fix 2.64 cross compile detection for AVR and RTEMS
|
|
dnl by not trying to compile fopen.
|
|
m4_if(m4_defn([m4_PACKAGE_VERSION]), [2.64],
|
|
[m4_foreach([_GCC_LANG], [C, C++, Fortran, Fortran 77],
|
|
[m4_define([_AC_LANG_IO_PROGRAM(]_GCC_LANG[)], m4_defn([AC_LANG_PROGRAM(]_GCC_LANG[)]))])])
|
|
|
|
m4_version_prereq([2.66],, [
|
|
dnl We need AC_CHECK_DECL which works for overloaded C++ functions.
|
|
|
|
# _AC_CHECK_DECL_BODY
|
|
# -------------------
|
|
# Shell function body for AC_CHECK_DECL.
|
|
m4_define([_AC_CHECK_DECL_BODY],
|
|
[ AS_LINENO_PUSH([$[]1])
|
|
[as_decl_name=`echo $][2|sed 's/ *(.*//'`]
|
|
[as_decl_use=`echo $][2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`]
|
|
AC_CACHE_CHECK([whether $as_decl_name is declared], [$[]3],
|
|
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$[]4],
|
|
[@%:@ifndef $[]as_decl_name
|
|
@%:@ifdef __cplusplus
|
|
(void) $[]as_decl_use;
|
|
@%:@else
|
|
(void) $[]as_decl_name;
|
|
@%:@endif
|
|
@%:@endif
|
|
])],
|
|
[AS_VAR_SET([$[]3], [yes])],
|
|
[AS_VAR_SET([$[]3], [no])])])
|
|
AS_LINENO_POP
|
|
])# _AC_CHECK_DECL_BODY
|
|
|
|
# _AC_CHECK_DECLS(SYMBOL, ACTION-IF_FOUND, ACTION-IF-NOT-FOUND,
|
|
# INCLUDES)
|
|
# -------------------------------------------------------------
|
|
# Helper to AC_CHECK_DECLS, which generates the check for a single
|
|
# SYMBOL with INCLUDES, performs the AC_DEFINE, then expands
|
|
# ACTION-IF-FOUND or ACTION-IF-NOT-FOUND.
|
|
m4_define([_AC_CHECK_DECLS],
|
|
[AC_CHECK_DECL([$1], [ac_have_decl=1], [ac_have_decl=0], [$4])]dnl
|
|
[AC_DEFINE_UNQUOTED(AS_TR_CPP(m4_bpatsubst(HAVE_DECL_[$1],[ *(.*])),
|
|
[$ac_have_decl],
|
|
[Define to 1 if you have the declaration of `$1',
|
|
and to 0 if you don't.])]dnl
|
|
[m4_ifvaln([$2$3], [AS_IF([test $ac_have_decl = 1], [$2], [$3])])])
|
|
|
|
])
|
|
|
|
])
|