diff options
Diffstat (limited to 'gnulib-m4/ldexpl.m4')
| -rw-r--r-- | gnulib-m4/ldexpl.m4 | 86 |
1 files changed, 44 insertions, 42 deletions
diff --git a/gnulib-m4/ldexpl.m4 b/gnulib-m4/ldexpl.m4 index 8ba85c6..d84b50f 100644 --- a/gnulib-m4/ldexpl.m4 +++ b/gnulib-m4/ldexpl.m4 @@ -1,5 +1,5 @@ -# ldexpl.m4 serial 4 -dnl Copyright (C) 2007-2009 Free Software Foundation, Inc. +# ldexpl.m4 serial 5 +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, dnl with or without modifications, as long as this notice is preserved. @@ -7,54 +7,56 @@ dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_LDEXPL], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) + dnl Check whether it's declared. + dnl MacOS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>. + AC_CHECK_DECL([ldexpl], , [HAVE_DECL_LDEXPL=0], [#include <math.h>]) LDEXPL_LIBM= - AC_CACHE_CHECK([whether ldexpl() can be used without linking with libm], - [gl_cv_func_ldexpl_no_libm], - [ - AC_TRY_LINK([#include <math.h> - long double x;], - [return ldexpl (x, -1) > 0;], - [gl_cv_func_ldexpl_no_libm=yes], - [gl_cv_func_ldexpl_no_libm=no]) - ]) - if test $gl_cv_func_ldexpl_no_libm = no; then - AC_CACHE_CHECK([whether ldexpl() can be used with libm], - [gl_cv_func_ldexpl_in_libm], + if test $HAVE_DECL_LDEXPL = 1; then + AC_CACHE_CHECK([whether ldexpl() can be used without linking with libm], + [gl_cv_func_ldexpl_no_libm], [ - save_LIBS="$LIBS" - LIBS="$LIBS -lm" AC_TRY_LINK([#include <math.h> long double x;], [return ldexpl (x, -1) > 0;], - [gl_cv_func_ldexpl_in_libm=yes], - [gl_cv_func_ldexpl_in_libm=no]) - LIBS="$save_LIBS" + [gl_cv_func_ldexpl_no_libm=yes], + [gl_cv_func_ldexpl_no_libm=no]) ]) - if test $gl_cv_func_ldexpl_in_libm = yes; then - LDEXPL_LIBM=-lm + if test $gl_cv_func_ldexpl_no_libm = no; then + AC_CACHE_CHECK([whether ldexpl() can be used with libm], + [gl_cv_func_ldexpl_in_libm], + [ + save_LIBS="$LIBS" + LIBS="$LIBS -lm" + AC_TRY_LINK([#include <math.h> + long double x;], + [return ldexpl (x, -1) > 0;], + [gl_cv_func_ldexpl_in_libm=yes], + [gl_cv_func_ldexpl_in_libm=no]) + LIBS="$save_LIBS" + ]) + if test $gl_cv_func_ldexpl_in_libm = yes; then + LDEXPL_LIBM=-lm + fi + fi + if test $gl_cv_func_ldexpl_no_libm = yes \ + || test $gl_cv_func_ldexpl_in_libm = yes; then + save_LIBS="$LIBS" + LIBS="$LIBS $LDEXPL_LIBM" + gl_FUNC_LDEXPL_WORKS + LIBS="$save_LIBS" + case "$gl_cv_func_ldexpl_works" in + *yes) gl_func_ldexpl=yes ;; + *) gl_func_ldexpl=no; REPLACE_LDEXPL=1; LDEXPL_LIBM= ;; + esac + else + gl_func_ldexpl=no + fi + if test $gl_func_ldexpl = yes; then + AC_DEFINE([HAVE_LDEXPL], [1], + [Define if the ldexpl() function is available.]) fi fi - if test $gl_cv_func_ldexpl_no_libm = yes \ - || test $gl_cv_func_ldexpl_in_libm = yes; then - save_LIBS="$LIBS" - LIBS="$LIBS $LDEXPL_LIBM" - gl_FUNC_LDEXPL_WORKS - LIBS="$save_LIBS" - case "$gl_cv_func_ldexpl_works" in - *yes) gl_func_ldexpl=yes ;; - *) gl_func_ldexpl=no; REPLACE_LDEXPL=1; LDEXPL_LIBM= ;; - esac - else - gl_func_ldexpl=no - fi - if test $gl_func_ldexpl = yes; then - AC_DEFINE([HAVE_LDEXPL], [1], - [Define if the ldexpl() function is available.]) - dnl Also check whether it's declared. - dnl MacOS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>. - AC_CHECK_DECL([ldexpl], , [HAVE_DECL_LDEXPL=0], [#include <math.h>]) - else - HAVE_DECL_LDEXPL=0 + if test $HAVE_DECL_LDEXPL = 0 || test $gl_func_ldexpl = no; then AC_LIBOBJ([ldexpl]) fi AC_SUBST([LDEXPL_LIBM]) |