X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=inline;f=m4%2Ffrexpl.m4;h=91f2a357b6f606df722c5973bf4d28cd752c9061;hb=9723bfe9bb9af8309314ad6230f7661000ba03b1;hp=2e8c68136dc7d0b03f54273ba9b4f41caca9fcac;hpb=6195fa324fac1442ba68395a30f32110997959dd;p=gnulib.git

diff --git a/m4/frexpl.m4 b/m4/frexpl.m4
index 2e8c68136..91f2a357b 100644
--- a/m4/frexpl.m4
+++ b/m4/frexpl.m4
@@ -1,4 +1,4 @@
-# frexpl.m4 serial 15
+# frexpl.m4 serial 18
 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,9 +7,10 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_FREXPL],
 [
   AC_REQUIRE([gl_MATH_H_DEFAULTS])
+  AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
   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>])
+  AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [[#include <math.h>]])
   FREXPL_LIBM=
   if test $HAVE_DECL_FREXPL = 1; then
     gl_CHECK_FREXPL_NO_LIBM
@@ -40,7 +41,7 @@ AC_DEFUN([gl_FUNC_FREXPL],
       LIBS="$save_LIBS"
       case "$gl_cv_func_frexpl_works" in
         *yes) gl_func_frexpl=yes ;;
-        *)    gl_func_frexpl=no; REPLACE_FREXPL=1; FREXPL_LIBM= ;;
+        *)    gl_func_frexpl=no; REPLACE_FREXPL=1 ;;
       esac
     else
       gl_func_frexpl=no
@@ -50,15 +51,25 @@ AC_DEFUN([gl_FUNC_FREXPL],
         [Define if the frexpl() function is available.])
     fi
   fi
+  if test $HAVE_DECL_FREXPL = 0 || test $gl_func_frexpl = no; then
+    dnl Find libraries needed to link lib/frexpl.c.
+    if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+      AC_REQUIRE([gl_FUNC_FREXP])
+      FREXPL_LIBM="$FREXP_LIBM"
+    else
+      FREXPL_LIBM=
+    fi
+  fi
   AC_SUBST([FREXPL_LIBM])
 ])
 
 AC_DEFUN([gl_FUNC_FREXPL_NO_LIBM],
 [
   AC_REQUIRE([gl_MATH_H_DEFAULTS])
+  AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
   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>])
+  AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [[#include <math.h>]])
   if test $HAVE_DECL_FREXPL = 1; then
     gl_CHECK_FREXPL_NO_LIBM
     if test $gl_cv_func_frexpl_no_libm = yes; then
@@ -115,6 +126,20 @@ AC_DEFUN([gl_FUNC_FREXPL_WORKS],
 # undef LDBL_MIN_EXP
 # define LDBL_MIN_EXP    (-16381)
 #endif
+#if defined __i386__ && defined __FreeBSD__
+# undef LDBL_MIN_EXP
+# define LDBL_MIN_EXP    (-16381)
+#endif
+#if (defined _ARCH_PPC || defined _POWER) && defined _AIX && (LDBL_MANT_DIG == 106) && defined __GNUC__
+# undef LDBL_MIN_EXP
+# define LDBL_MIN_EXP DBL_MIN_EXP
+#endif
+#if defined __sgi && (LDBL_MANT_DIG >= 106)
+# if defined __GNUC__
+#  undef LDBL_MIN_EXP
+#  define LDBL_MIN_EXP DBL_MIN_EXP
+# endif
+#endif
 extern
 #ifdef __cplusplus
 "C"