2ef2cd7a85
* extensions.m4 (AC_USE_SYSTEM_EXTENSIONS): Do not expand for Autoconf 2.62 or newer. * tls.m4 (GCC_CHECK_TLS): Fix m4 quotation. * no-executables.m4 (_AC_COMPILER_EXEEXT): Fix m4 quotation. * override.m4 (m4_copy_force, m4_rename_force): Provide macros if not defined. (AC_PREREQ): Use m4_copy_force. readline/examples/rlfe/ * configure.in: Correctly quote AC_PROGRAM_SOURCE definition.
70 lines
2.2 KiB
Plaintext
70 lines
2.2 KiB
Plaintext
# GCC_NO_EXECUTABLES
|
|
# -----------------
|
|
# FIXME: The GCC team has specific needs which the current Autoconf
|
|
# framework cannot solve elegantly. This macro implements a dirty
|
|
# hack until Autoconf is able to provide the services its users
|
|
# need.
|
|
#
|
|
# Several of the support libraries that are often built with GCC can't
|
|
# assume the tool-chain is already capable of linking a program: the
|
|
# compiler often expects to be able to link with some of such
|
|
# libraries.
|
|
#
|
|
# In several of these libraries, workarounds have been introduced to
|
|
# avoid the AC_PROG_CC_WORKS test, that would just abort their
|
|
# configuration. The introduction of AC_EXEEXT, enabled either by
|
|
# libtool or by CVS autoconf, have just made matters worse.
|
|
#
|
|
# Unlike the previous AC_NO_EXECUTABLES, this test does not
|
|
# disable link tests at autoconf time, but at configure time.
|
|
# This allows AC_NO_EXECUTABLES to be invoked conditionally.
|
|
AC_DEFUN_ONCE([GCC_NO_EXECUTABLES],
|
|
[m4_divert_push([KILL])
|
|
|
|
AC_BEFORE([$0], [_AC_COMPILER_EXEEXT])
|
|
AC_BEFORE([$0], [AC_LINK_IFELSE])
|
|
|
|
m4_define([_AC_COMPILER_EXEEXT],
|
|
[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
|
|
# FIXME: Cleanup?
|
|
AS_IF([AC_TRY_EVAL(ac_link)], [gcc_no_link=no], [gcc_no_link=yes])
|
|
if test x$gcc_no_link = xyes; then
|
|
# Setting cross_compile will disable run tests; it will
|
|
# also disable AC_CHECK_FILE but that's generally
|
|
# correct if we can't link.
|
|
cross_compiling=yes
|
|
EXEEXT=
|
|
else
|
|
]m4_defn([_AC_COMPILER_EXEEXT])dnl
|
|
fi
|
|
)
|
|
|
|
m4_define([AC_LINK_IFELSE],
|
|
if test x$gcc_no_link = xyes; then
|
|
AC_MSG_ERROR([Link tests are not allowed after [[$0]].])
|
|
fi
|
|
m4_defn([AC_LINK_IFELSE]))
|
|
|
|
dnl This is a shame. We have to provide a default for some link tests,
|
|
dnl similar to the default for run tests.
|
|
m4_define([AC_FUNC_MMAP],
|
|
if test x$gcc_no_link = xyes; then
|
|
if test "x${ac_cv_func_mmap_fixed_mapped+set}" != xset; then
|
|
ac_cv_func_mmap_fixed_mapped=no
|
|
fi
|
|
fi
|
|
if test "x${ac_cv_func_mmap_fixed_mapped}" != xno; then
|
|
m4_defn([AC_FUNC_MMAP])
|
|
fi)
|
|
|
|
m4_divert_pop()dnl
|
|
])# GCC_NO_EXECUTABLES
|
|
|
|
# Use the strongest available test out of AC_TRY_COMPILE and AC_TRY_LINK.
|
|
AC_DEFUN([GCC_TRY_COMPILE_OR_LINK],
|
|
[if test x$gcc_no_link = xyes; then
|
|
AC_TRY_COMPILE([$1], [$2], [$3], [$4])
|
|
else
|
|
AC_TRY_LINK([$1], [$2], [$3], [$4])
|
|
fi])
|