diff options
author | Bruno Haible <bruno@clisp.org> | 2007-02-25 14:20:46 +0000 |
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committer | Bruno Haible <bruno@clisp.org> | 2007-02-25 14:20:46 +0000 |
commit | e5de8bf80c52f872c5ca944db9bf3fd28993bd2e (patch) | |
tree | 529a1af2d7fd52639e399896d86b26c58217fd47 /m4/printf-frexp.m4 | |
parent | 563ea91ac9156e83e5a6dfed3510aaa3bf67c6ad (diff) | |
download | gnulib-e5de8bf80c52f872c5ca944db9bf3fd28993bd2e.tar.gz |
New module 'printf-frexp'.
Diffstat (limited to 'm4/printf-frexp.m4')
-rw-r--r-- | m4/printf-frexp.m4 | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/m4/printf-frexp.m4 b/m4/printf-frexp.m4 new file mode 100644 index 0000000000..9cb68c3186 --- /dev/null +++ b/m4/printf-frexp.m4 @@ -0,0 +1,40 @@ +# printf-frexp.m4 serial 1 +dnl Copyright (C) 2007 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. + +dnl Check how to define printf_frexp() without linking with libm. + +AC_DEFUN([gl_FUNC_PRINTF_FREXP], +[ + AC_CACHE_CHECK([whether frexp can be used without linking with libm], + [gl_cv_func_frexp_no_libm], + [ + AC_TRY_LINK([#include <math.h> + double x; + int y;], + [return frexp (x, &y) < 1;], + [gl_cv_func_frexp_no_libm=yes], + [gl_cv_func_frexp_no_libm=no]) + ]) + if test $gl_cv_func_frexp_no_libm = yes; then + AC_DEFINE([HAVE_FREXP_IN_LIBC], 1, + [Define if the frexp function is available in libc.]) + fi + + AC_CACHE_CHECK([whether ldexp can be used without linking with libm], + [gl_cv_func_ldexp_no_libm], + [ + AC_TRY_LINK([#include <math.h> + double x; + int y;], + [return ldexp (x, y) < 1;], + [gl_cv_func_ldexp_no_libm=yes], + [gl_cv_func_ldexp_no_libm=no]) + ]) + if test $gl_cv_func_ldexp_no_libm = yes; then + AC_DEFINE([HAVE_LDEXP_IN_LIBC], 1, + [Define if the ldexp function is available in libc.]) + fi +]) |