diff options
Diffstat (limited to 'gnulib-m4/frexpl.m4')
| -rw-r--r-- | gnulib-m4/frexpl.m4 | 140 |
1 files changed, 72 insertions, 68 deletions
diff --git a/gnulib-m4/frexpl.m4 b/gnulib-m4/frexpl.m4 index c5da7446..80165204 100644 --- a/gnulib-m4/frexpl.m4 +++ b/gnulib-m4/frexpl.m4 @@ -1,5 +1,5 @@ # frexpl.m4 serial 9 -dnl Copyright (C) 2007-2009 Free Software Foundation, Inc. +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_FREXPL], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) + dnl Check whether it's declared. + dnl MacOS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>. + AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [#include <math.h>]) FREXPL_LIBM= - AC_CACHE_CHECK([whether frexpl() can be used without linking with libm], - [gl_cv_func_frexpl_no_libm], - [ - AC_TRY_LINK([#include <math.h> - long double x;], - [int e; return frexpl (x, &e) > 0;], - [gl_cv_func_frexpl_no_libm=yes], - [gl_cv_func_frexpl_no_libm=no]) - ]) - if test $gl_cv_func_frexpl_no_libm = no; then - AC_CACHE_CHECK([whether frexpl() can be used with libm], - [gl_cv_func_frexpl_in_libm], + if test $HAVE_DECL_FREXPL = 1; then + AC_CACHE_CHECK([whether frexpl() can be used without linking with libm], + [gl_cv_func_frexpl_no_libm], [ - save_LIBS="$LIBS" - LIBS="$LIBS -lm" AC_TRY_LINK([#include <math.h> long double x;], [int e; return frexpl (x, &e) > 0;], - [gl_cv_func_frexpl_in_libm=yes], - [gl_cv_func_frexpl_in_libm=no]) - LIBS="$save_LIBS" + [gl_cv_func_frexpl_no_libm=yes], + [gl_cv_func_frexpl_no_libm=no]) ]) - if test $gl_cv_func_frexpl_in_libm = yes; then - FREXPL_LIBM=-lm + if test $gl_cv_func_frexpl_no_libm = no; then + AC_CACHE_CHECK([whether frexpl() can be used with libm], + [gl_cv_func_frexpl_in_libm], + [ + save_LIBS="$LIBS" + LIBS="$LIBS -lm" + AC_TRY_LINK([#include <math.h> + long double x;], + [int e; return frexpl (x, &e) > 0;], + [gl_cv_func_frexpl_in_libm=yes], + [gl_cv_func_frexpl_in_libm=no]) + LIBS="$save_LIBS" + ]) + if test $gl_cv_func_frexpl_in_libm = yes; then + FREXPL_LIBM=-lm + fi + fi + if test $gl_cv_func_frexpl_no_libm = yes \ + || test $gl_cv_func_frexpl_in_libm = yes; then + save_LIBS="$LIBS" + LIBS="$LIBS $FREXPL_LIBM" + gl_FUNC_FREXPL_WORKS + LIBS="$save_LIBS" + case "$gl_cv_func_frexpl_works" in + *yes) gl_func_frexpl=yes ;; + *) gl_func_frexpl=no; REPLACE_FREXPL=1; FREXPL_LIBM= ;; + esac + else + gl_func_frexpl=no + fi + if test $gl_func_frexpl = yes; then + AC_DEFINE([HAVE_FREXPL], [1], + [Define if the frexpl() function is available.]) fi fi - if test $gl_cv_func_frexpl_no_libm = yes \ - || test $gl_cv_func_frexpl_in_libm = yes; then - save_LIBS="$LIBS" - LIBS="$LIBS $FREXPL_LIBM" - gl_FUNC_FREXPL_WORKS - LIBS="$save_LIBS" - case "$gl_cv_func_frexpl_works" in - *yes) gl_func_frexpl=yes ;; - *) gl_func_frexpl=no; REPLACE_FREXPL=1; FREXPL_LIBM= ;; - esac - else - gl_func_frexpl=no - fi - if test $gl_func_frexpl = yes; then - AC_DEFINE([HAVE_FREXPL], [1], - [Define if the frexpl() function is available.]) - dnl Also check whether it's declared. - dnl MacOS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>. - AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [#include <math.h>]) - else - HAVE_DECL_FREXPL=0 + if test $HAVE_DECL_FREXPL = 0 || test $gl_func_frexpl = no; then AC_LIBOBJ([frexpl]) fi AC_SUBST([FREXPL_LIBM]) @@ -63,34 +65,36 @@ AC_DEFUN([gl_FUNC_FREXPL], AC_DEFUN([gl_FUNC_FREXPL_NO_LIBM], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) - AC_CACHE_CHECK([whether frexpl() can be used without linking with libm], - [gl_cv_func_frexpl_no_libm], - [ - AC_TRY_LINK([#include <math.h> - long double x;], - [int e; return frexpl (x, &e) > 0;], - [gl_cv_func_frexpl_no_libm=yes], - [gl_cv_func_frexpl_no_libm=no]) - ]) - if test $gl_cv_func_frexpl_no_libm = yes; then - gl_FUNC_FREXPL_WORKS - case "$gl_cv_func_frexpl_works" in - *yes) gl_func_frexpl_no_libm=yes ;; - *) gl_func_frexpl_no_libm=no; REPLACE_FREXPL=1 ;; - esac - else - gl_func_frexpl_no_libm=no - dnl Set REPLACE_FREXPL here because the system may have frexpl in libm. - REPLACE_FREXPL=1 + dnl Check whether it's declared. + dnl MacOS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>. + AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [#include <math.h>]) + if test $HAVE_DECL_FREXPL = 1; then + AC_CACHE_CHECK([whether frexpl() can be used without linking with libm], + [gl_cv_func_frexpl_no_libm], + [ + AC_TRY_LINK([#include <math.h> + long double x;], + [int e; return frexpl (x, &e) > 0;], + [gl_cv_func_frexpl_no_libm=yes], + [gl_cv_func_frexpl_no_libm=no]) + ]) + if test $gl_cv_func_frexpl_no_libm = yes; then + gl_FUNC_FREXPL_WORKS + case "$gl_cv_func_frexpl_works" in + *yes) gl_func_frexpl_no_libm=yes ;; + *) gl_func_frexpl_no_libm=no; REPLACE_FREXPL=1 ;; + esac + else + gl_func_frexpl_no_libm=no + dnl Set REPLACE_FREXPL here because the system may have frexpl in libm. + REPLACE_FREXPL=1 + fi + if test $gl_func_frexpl_no_libm = yes; then + AC_DEFINE([HAVE_FREXPL_IN_LIBC], [1], + [Define if the frexpl() function is available in libc.]) + fi fi - if test $gl_func_frexpl_no_libm = yes; then - AC_DEFINE([HAVE_FREXPL_IN_LIBC], [1], - [Define if the frexpl() function is available in libc.]) - dnl Also check whether it's declared. - dnl MacOS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>. - AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [#include <math.h>]) - else - HAVE_DECL_FREXPL=0 + if test $HAVE_DECL_FREXPL = 0 || test $gl_func_frexpl_no_libm = no; then AC_LIBOBJ([frexpl]) fi ]) |