114 lines
3.6 KiB
Plaintext
114 lines
3.6 KiB
Plaintext
# error_h.m4 serial 1
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dnl Copyright (C) 1996-2023 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 From Bruno Haible.
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dnl Provide a working "error.h".
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AC_DEFUN_ONCE([gl_ERROR_H],
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[
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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gl_CHECK_FUNCS_ANDROID([error], [[#include <error.h>]])
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if test $ac_cv_func_error = yes; then
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HAVE_ERROR=1
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else
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HAVE_ERROR=0
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fi
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REPLACE_ERROR=0
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dnl We don't use AC_FUNC_ERROR_AT_LINE any more, because it is no longer
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dnl maintained in Autoconf and because it invokes AC_LIBOBJ.
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dnl We need to notice a missing declaration, like gl_CHECK_FUNCS_ANDROID does.
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AC_CHECK_DECL([error_at_line], , , [[#include <error.h>]])
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if test $ac_cv_have_decl_error_at_line = yes; then
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AC_CACHE_CHECK([for error_at_line], [ac_cv_lib_error_at_line],
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[AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <error.h>]],
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[[error_at_line (0, 0, "", 0, "an error occurred");]])],
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[ac_cv_lib_error_at_line=yes],
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[ac_cv_lib_error_at_line=no])])
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else
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ac_cv_lib_error_at_line=no
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fi
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if test $ac_cv_lib_error_at_line = yes; then
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HAVE_ERROR_AT_LINE=1
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else
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HAVE_ERROR_AT_LINE=0
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fi
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REPLACE_ERROR_AT_LINE=0
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if test $ac_cv_func_error = yes && test $ac_cv_lib_error_at_line = yes; then
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dnl On Android 11, when error_print_progname is set, the output of the
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dnl error() function contains an extra space.
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AC_CACHE_CHECK([for working error function],
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[gl_cv_func_working_error],
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[if test $cross_compiling != yes; then
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([[
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#include <error.h>
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static void print_no_progname (void) {}
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]], [[
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error_print_progname = print_no_progname;
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error (0, 0, "foo");
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]])
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],
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[rm -f conftest.out
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if test -s conftest$ac_exeext \
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&& ./conftest$ac_exeext 2> conftest.out; then
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if grep ' ' conftest.out >/dev/null; then
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gl_cv_func_working_error=no
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else
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gl_cv_func_working_error=yes
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fi
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else
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gl_cv_func_working_error=no
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fi
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rm -f conftest.out
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],
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[gl_cv_func_working_error=no])
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else
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([[
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#include <error.h>
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]], [[
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error (0, 0, "foo");
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]])
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],
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[case "$host_os" in
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# Guess yes on glibc systems.
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*-gnu* | gnu*) gl_cv_func_working_error="guessing yes" ;;
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# Guess no on Android.
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linux*-android*) gl_cv_func_working_error="guessing no" ;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_working_error="$gl_cross_guess_normal" ;;
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esac
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],
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[gl_cv_func_working_error=no])
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fi
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])
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case "$gl_cv_func_working_error" in
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*no)
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REPLACE_ERROR=1
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REPLACE_ERROR_AT_LINE=1
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;;
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esac
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fi
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if test $HAVE_ERROR = 0 || test $REPLACE_ERROR = 1 \
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|| test $HAVE_ERROR_AT_LINE = 0 || test $REPLACE_ERROR_AT_LINE = 1; then
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dnl Provide a substitute <error.h> file.
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GL_GENERATE_ERROR_H=true
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else
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GL_GENERATE_ERROR_H=false
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fi
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AC_SUBST([HAVE_ERROR])
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AC_SUBST([HAVE_ERROR_AT_LINE])
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AC_SUBST([REPLACE_ERROR])
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AC_SUBST([REPLACE_ERROR_AT_LINE])
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])
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