gnulib: m4/log10.m4 annotate

annotate m4/log10.m4 @ 40231:9b3c79fdfe0b

strtod: fix clash with strtold Problem reported for RHEL 5 by Jesse Caldwell (Bug#34817). * lib/strtod.c (compute_minus_zero, minus_zero): Simplify by remving the macro / external variable, and having just a function. User changed. This avoids the need for an external variable that might clash.

author	Paul Eggert <eggert@cs.ucla.edu>
date	Mon, 11 Mar 2019 16:40:29 -0700
parents	e2e6dc79463b
children

rev	line source
40109 e2e6dc79463b Defeat current GCC optimizations in math autoconf tests. Bruno Haible <bruno@clisp.org> parents: 40057 diff changeset	1 # log10.m4 serial 9
40057 b06060465f09 maint: Run 'make update-copyright' Paul Eggert <eggert@cs.ucla.edu> parents: 39913 diff changeset	2 dnl Copyright (C) 2011-2019 Free Software Foundation, Inc.
15865 570755d1838e log10: Use a .m4 file. Bruno Haible <bruno@clisp.org> parents: diff changeset	3 dnl This file is free software; the Free Software Foundation
570755d1838e log10: Use a .m4 file. Bruno Haible <bruno@clisp.org> parents: diff changeset	4 dnl gives unlimited permission to copy and/or distribute it,
570755d1838e log10: Use a .m4 file. Bruno Haible <bruno@clisp.org> parents: diff changeset	5 dnl with or without modifications, as long as this notice is preserved.
570755d1838e log10: Use a .m4 file. Bruno Haible <bruno@clisp.org> parents: diff changeset	6
570755d1838e log10: Use a .m4 file. Bruno Haible <bruno@clisp.org> parents: diff changeset	7 AC_DEFUN([gl_FUNC_LOG10],
570755d1838e log10: Use a .m4 file. Bruno Haible <bruno@clisp.org> parents: diff changeset	8 [
16745 78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	9 m4_divert_text([DEFAULTS], [gl_log10_required=plain])
16736 747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	10 AC_REQUIRE([gl_MATH_H_DEFAULTS])
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	11
15865 570755d1838e log10: Use a .m4 file. Bruno Haible <bruno@clisp.org> parents: diff changeset	12 dnl Determine LOG10_LIBM.
570755d1838e log10: Use a .m4 file. Bruno Haible <bruno@clisp.org> parents: diff changeset	13 gl_COMMON_DOUBLE_MATHFUNC([log10])
16736 747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	14
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	15 save_LIBS="$LIBS"
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	16 LIBS="$LIBS $LOG10_LIBM"
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	17 gl_FUNC_LOG10_WORKS
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	18 LIBS="$save_LIBS"
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	19 case "$gl_cv_func_log10_works" in
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	20 *yes) ;;
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	21 *) REPLACE_LOG10=1 ;;
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	22 esac
16745 78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	23
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	24 m4_ifdef([gl_FUNC_LOG10_IEEE], [
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	25 if test $gl_log10_required = ieee && test $REPLACE_LOG10 = 0; then
16811 b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16745 diff changeset	26 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
16745 78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	27 AC_CACHE_CHECK([whether log10 works according to ISO C 99 with IEC 60559],
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	28 [gl_cv_func_log10_ieee],
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	29 [
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	30 save_LIBS="$LIBS"
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	31 LIBS="$LIBS $LOG10_LIBM"
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	32 AC_RUN_IFELSE(
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	33 [AC_LANG_SOURCE([[
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	34 #ifndef __NO_MATH_INLINES
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	35 # define __NO_MATH_INLINES 1 /* for glibc */
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	36 #endif
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	37 #include <math.h>
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	38 /* Compare two numbers with ==.
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	39 This is a separate function because IRIX 6.5 "cc -O" miscompiles an
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	40 'x == x' test. */
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	41 static int
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	42 numeric_equal (double x, double y)
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	43 {
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	44 return x == y;
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	45 }
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	46 static double dummy (double x) { return 0; }
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	47 int main (int argc, char *argv[])
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	48 {
40109 e2e6dc79463b Defeat current GCC optimizations in math autoconf tests. Bruno Haible <bruno@clisp.org> parents: 40057 diff changeset	49 double (* volatile my_log10) (double) = argc ? log10 : dummy;
16745 78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	50 /* Test log10(negative).
39913 73d60b1f9c96 doc: Update for Solaris 11.4. Bruno Haible <bruno@clisp.org> parents: 19484 diff changeset	51 This test fails on NetBSD 5.1, Solaris 11.4. */
16745 78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	52 double y = my_log10 (-1.0);
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	53 if (numeric_equal (y, y))
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	54 return 1;
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	55 return 0;
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	56 }
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	57 ]])],
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	58 [gl_cv_func_log10_ieee=yes],
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	59 [gl_cv_func_log10_ieee=no],
16811 b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16745 diff changeset	60 [case "$host_os" in
19479 4bc5b8cefed7 Add cross-compilation results for GNU/Hurd. Samuel Thibault <samuel.thibault@gnu.org> parents: 19241 diff changeset	61 # Guess yes on glibc systems.
4bc5b8cefed7 Add cross-compilation results for GNU/Hurd. Samuel Thibault <samuel.thibault@gnu.org> parents: 19241 diff changeset	62 -gnu \| gnu*) gl_cv_func_log10_ieee="guessing yes" ;;
4bc5b8cefed7 Add cross-compilation results for GNU/Hurd. Samuel Thibault <samuel.thibault@gnu.org> parents: 19241 diff changeset	63 # Guess yes on native Windows.
4bc5b8cefed7 Add cross-compilation results for GNU/Hurd. Samuel Thibault <samuel.thibault@gnu.org> parents: 19241 diff changeset	64 mingw*) gl_cv_func_log10_ieee="guessing yes" ;;
4bc5b8cefed7 Add cross-compilation results for GNU/Hurd. Samuel Thibault <samuel.thibault@gnu.org> parents: 19241 diff changeset	65 # If we don't know, assume the worst.
4bc5b8cefed7 Add cross-compilation results for GNU/Hurd. Samuel Thibault <samuel.thibault@gnu.org> parents: 19241 diff changeset	66 *) gl_cv_func_log10_ieee="guessing no" ;;
16811 b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16745 diff changeset	67 esac
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16745 diff changeset	68 ])
16745 78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	69 LIBS="$save_LIBS"
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	70 ])
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	71 case "$gl_cv_func_log10_ieee" in
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	72 *yes) ;;
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	73 *) REPLACE_LOG10=1 ;;
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	74 esac
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	75 fi
78fe2a20b15c log10-ieee: Work around test failure on NetBSD 5.1 and Solaris 11. Bruno Haible <bruno@clisp.org> parents: 16736 diff changeset	76 ])
15865 570755d1838e log10: Use a .m4 file. Bruno Haible <bruno@clisp.org> parents: diff changeset	77 ])
16736 747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	78
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	79 dnl Test whether log10() works.
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	80 dnl On OSF/1 5.1, log10(-0.0) is NaN.
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	81 AC_DEFUN([gl_FUNC_LOG10_WORKS],
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	82 [
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	83 AC_REQUIRE([AC_PROG_CC])
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	84 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	85 AC_CACHE_CHECK([whether log10 works], [gl_cv_func_log10_works],
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	86 [
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	87 AC_RUN_IFELSE(
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	88 [AC_LANG_SOURCE([[
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	89 #include <math.h>
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	90 volatile double x;
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	91 double y;
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	92 int main ()
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	93 {
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	94 x = -0.0;
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	95 y = log10 (x);
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	96 if (!(y + y == y))
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	97 return 1;
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	98 return 0;
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	99 }
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	100 ]])],
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	101 [gl_cv_func_log10_works=yes],
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	102 [gl_cv_func_log10_works=no],
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	103 [case "$host_os" in
18993 a75cfc731331 Improve cross-compilation guesses for native Windows. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	104 osf*) gl_cv_func_log10_works="guessing no" ;;
a75cfc731331 Improve cross-compilation guesses for native Windows. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	105 # Guess yes on native Windows.
a75cfc731331 Improve cross-compilation guesses for native Windows. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	106 mingw*) gl_cv_func_log10_works="guessing yes" ;;
a75cfc731331 Improve cross-compilation guesses for native Windows. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	107 *) gl_cv_func_log10_works="guessing yes" ;;
16736 747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	108 esac
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	109 ])
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	110 ])
747e0285fa98 log10: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	111 ])

Mercurial > gnulib

annotate m4/log10.m4 @ 40231:9b3c79fdfe0b