| 1 | # c-strtod.m4 serial 6
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| 2 |
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| 3 | # Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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| 4 | # This file is free software; the Free Software Foundation
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| 5 | # gives unlimited permission to copy and/or distribute it,
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| 6 | # with or without modifications, as long as this notice is preserved.
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| 7 |
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| 8 | # Written by Paul Eggert.
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| 9 |
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| 10 | AC_DEFUN([gl_C99_STRTOLD],
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| 11 | [
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| 12 | AC_CACHE_CHECK([whether strtold conforms to C99],
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| 13 | [gl_cv_func_c99_strtold],
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| 14 | [AC_COMPILE_IFELSE(
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| 15 | [AC_LANG_PROGRAM(
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| 16 | [[/* On HP-UX before 11.23, strtold returns a struct instead of
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| 17 | long double. Reject implementations like that, by requiring
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| 18 | compatibility with the C99 prototype. */
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| 19 | #include <stdlib.h>
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| 20 | static long double (*p) (char const *, char **) = strtold;
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| 21 | static long double
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| 22 | test (char const *nptr, char **endptr)
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| 23 | {
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| 24 | long double r;
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| 25 | r = strtold (nptr, endptr);
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| 26 | return r;
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| 27 | }]],
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| 28 | [[return test ("1.0", NULL) != 1 || p ("1.0", NULL) != 1;]])],
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| 29 | [gl_cv_func_c99_strtold=yes],
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| 30 | [gl_cv_func_c99_strtold=no])])
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| 31 | if test $gl_cv_func_c99_strtold = yes; then
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| 32 | AC_DEFINE([HAVE_C99_STRTOLD], 1, [Define to 1 if strtold conforms to C99.])
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| 33 | fi
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| 34 | ])
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| 35 |
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| 36 | AC_DEFUN([gl_C_STRTOD],
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| 37 | [
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| 38 | AC_LIBSOURCES([c-strtod.c, c-strtod.h])
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| 39 | AC_LIBOBJ([c-strtod])
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| 40 |
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| 41 | dnl Prerequisites of lib/c-strtod.c.
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| 42 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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| 43 | :
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| 44 | ])
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| 45 |
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| 46 | AC_DEFUN([gl_C_STRTOLD],
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| 47 | [
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| 48 | AC_LIBSOURCES([c-strtold.c, c-strtod.h])
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| 49 | AC_LIBOBJ([c-strtold])
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| 50 |
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| 51 | dnl Prerequisites of lib/c-strtold.c.
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| 52 | AC_REQUIRE([gl_C_STRTOD])
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| 53 | AC_REQUIRE([gl_C99_STRTOLD])
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| 54 | :
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| 55 | ])
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