pipe: Set errno upon failure.

[gnulib.git] / m4 / math_h.m4

diff --git a/m4/math_h.m4 b/m4/math_h.m4
index e3b499e..4cf403e 100644 (file)
--- a/m4/math_h.m4
+++ b/m4/math_h.m4
@@ -1,4 +1,4 @@
-# math_h.m4 serial 17
+# math_h.m4 serial 19
 dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -40,7 +40,7 @@ AC_DEFUN([gl_MATH_H],
   dnl corresponding gnulib module is not in use.
   gl_WARN_ON_USE_PREPARE([[#include <math.h>
     ]], [acosl asinl atanl ceilf ceill cosl expl floorf floorl frexpl
-    ldexpl logl round roundf roundl sinl sqrtl tanl trunc truncf truncl])
+    ldexpl logb logl round roundf roundl sinl sqrtl tanl trunc truncf truncl])
 ])
 
 AC_DEFUN([gl_MATH_MODULE_INDICATOR],
@@ -48,6 +48,8 @@ AC_DEFUN([gl_MATH_MODULE_INDICATOR],
   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
   AC_REQUIRE([gl_MATH_H_DEFAULTS])
   GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR([$1])
 ])
 
 AC_DEFUN([gl_MATH_H_DEFAULTS],
@@ -70,6 +72,7 @@ AC_DEFUN([gl_MATH_H_DEFAULTS],
   GNULIB_ISNAND=0;   AC_SUBST([GNULIB_ISNAND])
   GNULIB_ISNANL=0;   AC_SUBST([GNULIB_ISNANL])
   GNULIB_LDEXPL=0;   AC_SUBST([GNULIB_LDEXPL])
+  GNULIB_LOGB=0;     AC_SUBST([GNULIB_LOGB])
   GNULIB_LOGL=0;     AC_SUBST([GNULIB_LOGL])
   GNULIB_ROUND=0;    AC_SUBST([GNULIB_ROUND])
   GNULIB_ROUNDF=0;   AC_SUBST([GNULIB_ROUNDF])
@@ -101,6 +104,7 @@ AC_DEFUN([gl_MATH_H_DEFAULTS],
   HAVE_DECL_EXPL=1;            AC_SUBST([HAVE_DECL_EXPL])
   HAVE_DECL_FREXPL=1;          AC_SUBST([HAVE_DECL_FREXPL])
   HAVE_DECL_LDEXPL=1;          AC_SUBST([HAVE_DECL_LDEXPL])
+  HAVE_DECL_LOGB=1;            AC_SUBST([HAVE_DECL_LOGB])
   HAVE_DECL_LOGL=1;            AC_SUBST([HAVE_DECL_LOGL])
   HAVE_DECL_SINL=1;            AC_SUBST([HAVE_DECL_SINL])
   HAVE_DECL_SQRTL=1;           AC_SUBST([HAVE_DECL_SQRTL])