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4a462e3544
Because of how Guile saves and restores continuations (by copying the stack), and how it uses alloca to create space for debug information on the stack, we must have an alloca() that really does use the stack, and not one that uses the heap. To do this, we use the Gnulib "alloca-opt" module instead of "alloca". This commit also updates the Gnulib sources from the current Gnulib Git repository.
99 lines
3.5 KiB
Text
99 lines
3.5 KiB
Text
dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
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dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl Written by Eric Blake.
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# wchar.m4 serial 22
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AC_DEFUN([gl_WCHAR_H],
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[
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AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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AC_CACHE_CHECK([whether <wchar.h> is standalone],
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[gl_cv_header_wchar_h_standalone],
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[AC_COMPILE_IFELSE([[#include <wchar.h>
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wchar_t w;]],
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[gl_cv_header_wchar_h_standalone=yes],
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[gl_cv_header_wchar_h_standalone=no])])
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AC_REQUIRE([gt_TYPE_WINT_T])
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if test $gt_cv_c_wint_t = yes; then
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HAVE_WINT_T=1
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else
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HAVE_WINT_T=0
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fi
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AC_SUBST([HAVE_WINT_T])
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if test $gl_cv_header_wchar_h_standalone != yes || test $gt_cv_c_wint_t != yes; then
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WCHAR_H=wchar.h
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fi
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dnl Prepare for creating substitute <wchar.h>.
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dnl Do it always: WCHAR_H may be empty here but can be set later.
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dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
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dnl character support).
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AC_CHECK_HEADERS_ONCE([wchar.h])
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if test $ac_cv_header_wchar_h = yes; then
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HAVE_WCHAR_H=1
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else
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HAVE_WCHAR_H=0
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fi
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AC_SUBST([HAVE_WCHAR_H])
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gl_CHECK_NEXT_HEADERS([wchar.h])
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])
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dnl Unconditionally enables the replacement of <wchar.h>.
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AC_DEFUN([gl_REPLACE_WCHAR_H],
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[
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AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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WCHAR_H=wchar.h
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])
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AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
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[
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dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
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AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
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])
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AC_DEFUN([gl_WCHAR_H_DEFAULTS],
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[
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GNULIB_BTOWC=0; AC_SUBST([GNULIB_BTOWC])
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GNULIB_WCTOB=0; AC_SUBST([GNULIB_WCTOB])
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GNULIB_MBSINIT=0; AC_SUBST([GNULIB_MBSINIT])
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GNULIB_MBRTOWC=0; AC_SUBST([GNULIB_MBRTOWC])
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GNULIB_MBRLEN=0; AC_SUBST([GNULIB_MBRLEN])
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GNULIB_MBSRTOWCS=0; AC_SUBST([GNULIB_MBSRTOWCS])
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GNULIB_MBSNRTOWCS=0; AC_SUBST([GNULIB_MBSNRTOWCS])
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GNULIB_WCRTOMB=0; AC_SUBST([GNULIB_WCRTOMB])
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GNULIB_WCSRTOMBS=0; AC_SUBST([GNULIB_WCSRTOMBS])
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GNULIB_WCSNRTOMBS=0; AC_SUBST([GNULIB_WCSNRTOMBS])
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GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
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dnl Assume proper GNU behavior unless another module says otherwise.
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HAVE_BTOWC=1; AC_SUBST([HAVE_BTOWC])
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HAVE_MBSINIT=1; AC_SUBST([HAVE_MBSINIT])
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HAVE_MBRTOWC=1; AC_SUBST([HAVE_MBRTOWC])
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HAVE_MBRLEN=1; AC_SUBST([HAVE_MBRLEN])
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HAVE_MBSRTOWCS=1; AC_SUBST([HAVE_MBSRTOWCS])
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HAVE_MBSNRTOWCS=1; AC_SUBST([HAVE_MBSNRTOWCS])
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HAVE_WCRTOMB=1; AC_SUBST([HAVE_WCRTOMB])
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HAVE_WCSRTOMBS=1; AC_SUBST([HAVE_WCSRTOMBS])
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HAVE_WCSNRTOMBS=1; AC_SUBST([HAVE_WCSNRTOMBS])
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HAVE_DECL_WCTOB=1; AC_SUBST([HAVE_DECL_WCTOB])
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HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
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REPLACE_MBSTATE_T=0; AC_SUBST([REPLACE_MBSTATE_T])
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REPLACE_BTOWC=0; AC_SUBST([REPLACE_BTOWC])
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REPLACE_WCTOB=0; AC_SUBST([REPLACE_WCTOB])
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REPLACE_MBSINIT=0; AC_SUBST([REPLACE_MBSINIT])
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REPLACE_MBRTOWC=0; AC_SUBST([REPLACE_MBRTOWC])
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REPLACE_MBRLEN=0; AC_SUBST([REPLACE_MBRLEN])
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REPLACE_MBSRTOWCS=0; AC_SUBST([REPLACE_MBSRTOWCS])
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REPLACE_MBSNRTOWCS=0;AC_SUBST([REPLACE_MBSNRTOWCS])
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REPLACE_WCRTOMB=0; AC_SUBST([REPLACE_WCRTOMB])
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REPLACE_WCSRTOMBS=0; AC_SUBST([REPLACE_WCSRTOMBS])
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REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
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WCHAR_H=''; AC_SUBST([WCHAR_H])
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])
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