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-rw-r--r--m4/printf-frexpl.m448
1 files changed, 48 insertions, 0 deletions
diff --git a/m4/printf-frexpl.m4 b/m4/printf-frexpl.m4
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+++ b/m4/printf-frexpl.m4
@@ -0,0 +1,48 @@
+# printf-frexpl.m4 serial 10
+dnl Copyright (C) 2007, 2009-2022 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_frexpl() without linking with libm.
+
+AC_DEFUN([gl_FUNC_PRINTF_FREXPL],
+[
+ AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+
+ dnl Subset of gl_FUNC_FREXPL_NO_LIBM.
+ gl_CHECK_FREXPL_NO_LIBM
+ 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.])
+ dnl Also check whether it's declared.
+ dnl Mac OS 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>]])
+ fi
+
+ gl_CHECK_LDEXPL_NO_LIBM
+ if test $gl_cv_func_ldexpl_no_libm = yes; then
+ gl_FUNC_LDEXPL_WORKS
+ case "$gl_cv_func_ldexpl_works" in
+ *yes)
+ AC_DEFINE([HAVE_LDEXPL_IN_LIBC], [1],
+ [Define if the ldexpl function is available in libc.])
+ dnl Also check whether it's declared.
+ dnl Mac OS 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>]])
+ ;;
+ esac
+ fi
+])