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68 lines
1.9 KiB
Plaintext
68 lines
1.9 KiB
Plaintext
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#serial 1
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AC_PREREQ(2.50)
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# The EILSEQ errno value ought to be defined in <errno.h>, according to
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# ISO C 99 and POSIX. But some systems (like SunOS 4) don't define it,
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# and some systems (like BSD/OS) define it in <wchar.h> not <errno.h>.
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# Define EILSEQ as a C macro and as a substituted macro in such a way that
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# 1. on all systems, after inclusion of <errno.h>, EILSEQ is usable,
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# 2. on systems where EILSEQ is defined elsewhere, we use the same numeric
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# value.
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AC_DEFUN([AC_EILSEQ],
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[
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AC_REQUIRE([AC_PROG_CC])dnl
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dnl Check for any extra headers that could define EILSEQ.
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AC_CHECK_HEADERS(wchar.h)
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AC_CACHE_CHECK([for EILSEQ], ac_cv_decl_EILSEQ, [
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AC_EGREP_CPP(yes,[
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#include <errno.h>
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#ifdef EILSEQ
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yes
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#endif
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], have_eilseq=1)
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if test -n "$have_eilseq"; then
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dnl EILSEQ exists in <errno.h>. Don't need to define EILSEQ ourselves.
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ac_cv_decl_EILSEQ=yes
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else
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AC_EGREP_CPP(yes,[
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#include <errno.h>
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#if HAVE_WCHAR_H
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#include <wchar.h>
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#endif
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#ifdef EILSEQ
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yes
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#endif
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], have_eilseq=1)
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if test -n "$have_eilseq"; then
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dnl EILSEQ exists in some other system header.
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dnl Define it to the same value.
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_AC_COMPUTE_INT([EILSEQ], ac_cv_decl_EILSEQ, [
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#include <errno.h>
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#if HAVE_WCHAR_H
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#include <wchar.h>
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#endif
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/* The following two lines are a workaround against an autoconf-2.52 bug. */
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#include <stdio.h>
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#include <stdlib.h>
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])
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else
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dnl EILSEQ isn't defined by the system. Define EILSEQ ourselves, but
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dnl don't define it as EINVAL, because iconv() callers want to
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dnl distinguish EINVAL and EILSEQ.
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ac_cv_decl_EILSEQ=ENOENT
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fi
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fi
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])
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if test "$ac_cv_decl_EILSEQ" != yes; then
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AC_DEFINE_UNQUOTED([EILSEQ], [$ac_cv_decl_EILSEQ],
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[Define as good substitute value for EILSEQ.])
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EILSEQ="$ac_cv_decl_EILSEQ"
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AC_SUBST(EILSEQ)
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fi
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])
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