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authorManuel A. Fernandez Montecelo <manuel.montezelo@gmail.com>2016-05-27 14:28:30 +0100
committerManuel A. Fernandez Montecelo <manuel.montezelo@gmail.com>2016-05-27 14:28:30 +0100
commita9a31b1de5776a3b08a82101a4fa711294f0dd1d (patch)
tree159134a624e51509f40ed8823249f09a70d1dda3 /gnulib-m4/isnand.m4
parent5f2b09982312c98863eb9a8dfe2c608b81f58259 (diff)
Imported Upstream version 0.9.6+really0.9.3upstream/0.9.6+really0.9.3
Diffstat (limited to 'gnulib-m4/isnand.m4')
-rw-r--r--gnulib-m4/isnand.m459
1 files changed, 29 insertions, 30 deletions
diff --git a/gnulib-m4/isnand.m4 b/gnulib-m4/isnand.m4
index 4d5c615b..cd916284 100644
--- a/gnulib-m4/isnand.m4
+++ b/gnulib-m4/isnand.m4
@@ -1,5 +1,5 @@
-# isnand.m4 serial 11
-dnl Copyright (C) 2007-2015 Free Software Foundation, Inc.
+# isnand.m4 serial 6
+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.
@@ -24,6 +24,7 @@ AC_DEFUN([gl_FUNC_ISNAND],
else
gl_func_isnand=no
HAVE_ISNAND=0
+ gl_BUILD_ISNAND
fi
AC_SUBST([ISNAND_LIBM])
])
@@ -33,17 +34,19 @@ dnl Check how to get or define isnand() without linking with libm.
AC_DEFUN([gl_FUNC_ISNAND_NO_LIBM],
[
gl_HAVE_ISNAND_NO_LIBM
- gl_func_isnand_no_libm=$gl_cv_func_isnand_no_libm
if test $gl_cv_func_isnand_no_libm = yes; then
AC_DEFINE([HAVE_ISNAND_IN_LIBC], [1],
[Define if the isnan(double) function is available in libc.])
+ else
+ gl_BUILD_ISNAND
fi
])
-dnl Prerequisites of replacement isnand definition. It does not need -lm.
-AC_DEFUN([gl_PREREQ_ISNAND],
+dnl Pull in replacement isnand definition. It does not need -lm.
+AC_DEFUN([gl_BUILD_ISNAND],
[
- AC_REQUIRE([gl_DOUBLE_EXPONENT_LOCATION])
+ AC_LIBOBJ([isnand])
+ gl_DOUBLE_EXPONENT_LOCATION
])
dnl Test whether isnand() can be used with libm.
@@ -55,18 +58,16 @@ AC_DEFUN([gl_HAVE_ISNAND_IN_LIBM],
[
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
- AC_LINK_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <math.h>
- #if __GNUC__ >= 4
- # undef isnand
- # define isnand(x) __builtin_isnan ((double)(x))
- #elif defined isnan
- # undef isnand
- # define isnand(x) isnan ((double)(x))
- #endif
- double x;]],
- [[return isnand (x);]])],
+ AC_TRY_LINK([#include <math.h>
+ #if __GNUC__ >= 4
+ # undef isnand
+ # define isnand(x) __builtin_isnand ((double)(x))
+ #elif defined isnan
+ # undef isnand
+ # define isnand(x) isnan ((double)(x))
+ #endif
+ double x;],
+ [return isnand (x);],
[gl_cv_func_isnand_in_libm=yes],
[gl_cv_func_isnand_in_libm=no])
LIBS="$save_LIBS"
@@ -78,18 +79,16 @@ AC_DEFUN([gl_HAVE_ISNAND_NO_LIBM],
AC_CACHE_CHECK([whether isnan(double) can be used without linking with libm],
[gl_cv_func_isnand_no_libm],
[
- AC_LINK_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <math.h>
- #if __GNUC__ >= 4
- # undef isnand
- # define isnand(x) __builtin_isnan ((double)(x))
- #else
- # undef isnand
- # define isnand(x) isnan ((double)(x))
- #endif
- double x;]],
- [[return isnand (x);]])],
+ AC_TRY_LINK([#include <math.h>
+ #if __GNUC__ >= 4
+ # undef isnand
+ # define isnand(x) __builtin_isnan ((double)(x))
+ #else
+ # undef isnand
+ # define isnand(x) isnan ((double)(x))
+ #endif
+ double x;],
+ [return isnand (x);],
[gl_cv_func_isnand_no_libm=yes],
[gl_cv_func_isnand_no_libm=no])
])