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| author | Bruno Haible <bruno@clisp.org> | 2011-10-11 00:00:31 +0200 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2011-10-11 00:00:31 +0200 |
| commit | 150ee3a66dce0f413327e67322e5b89ed440bd71 (patch) | |
| tree | e2e8441b72fdc33a347f635153bf372f2358bd52 /m4/expl.m4 | |
| parent | f91a52116057e8f56e1af7dd58b2ded6274d60e5 (diff) | |
| download | gnulib-150ee3a66dce0f413327e67322e5b89ed440bd71.tar.gz | |
expl: Simplify for platforms where 'long double' == 'double'.
* lib/expl.c (expl) [HAVE_SAME_LONG_DOUBLE_AS_DOUBLE]: New alternative
implementation.
* m4/expl.m4 (gl_FUNC_EXPL): Require gl_LONG_DOUBLE_VS_DOUBLE.
Determine EXPL_LIBM according to HAVE_SAME_LONG_DOUBLE_AS_DOUBLE.
* modules/expl (Depends-on): Add exp. Update conditions.
Diffstat (limited to 'm4/expl.m4')
| -rw-r--r-- | m4/expl.m4 | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/m4/expl.m4 b/m4/expl.m4 index c9c1b7b9ed..af60829fac 100644 --- a/m4/expl.m4 +++ b/m4/expl.m4 @@ -1,4 +1,4 @@ -# expl.m4 serial 4 +# expl.m4 serial 5 dnl Copyright (C) 2010-2011 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -7,6 +7,8 @@ dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_EXPL], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) + AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) + dnl Persuade glibc <math.h> to declare expl(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) @@ -56,8 +58,13 @@ AC_DEFUN([gl_FUNC_EXPL], HAVE_DECL_EXPL=0 HAVE_EXPL=0 dnl Find libraries needed to link lib/expl.c. - AC_REQUIRE([gl_FUNC_FLOORL]) - EXPL_LIBM="$FLOORL_LIBM" + if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then + AC_REQUIRE([gl_FUNC_EXP]) + EXPL_LIBM="$EXP_LIBM" + else + AC_REQUIRE([gl_FUNC_FLOORL]) + EXPL_LIBM="$FLOORL_LIBM" + fi fi AC_SUBST([EXPL_LIBM]) ]) |