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install-reloc: Support multi-binary installation.
[gnulib.git]
/
m4
/
hypotf.m4
diff --git
a/m4/hypotf.m4
b/m4/hypotf.m4
index
c6185a5
..
aec739b
100644
(file)
--- a/
m4/hypotf.m4
+++ b/
m4/hypotf.m4
@@
-1,5
+1,5
@@
-# hypotf.m4 serial
2
-dnl Copyright (C) 2012 Free Software Foundation, Inc.
+# hypotf.m4 serial
4
+dnl Copyright (C) 2012
-2013
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 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.
@@
-10,6
+10,9
@@
AC_DEFUN([gl_FUNC_HYPOTF],
AC_REQUIRE([gl_MATH_H_DEFAULTS])
AC_REQUIRE([gl_FUNC_HYPOT])
AC_REQUIRE([gl_MATH_H_DEFAULTS])
AC_REQUIRE([gl_FUNC_HYPOT])
+ dnl Persuade glibc <math.h> to declare hypotf().
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
dnl Test whether hypotf() exists. Assume that hypotf(), if it exists, is
dnl defined in the same library as hypot().
save_LIBS="$LIBS"
dnl Test whether hypotf() exists. Assume that hypotf(), if it exists, is
dnl defined in the same library as hypot().
save_LIBS="$LIBS"
@@
-28,6
+31,7
@@
AC_DEFUN([gl_FUNC_HYPOTF],
esac
m4_ifdef([gl_FUNC_HYPOTF_IEEE], [
if test $gl_hypotf_required = ieee && test $REPLACE_HYPOTF = 0; then
esac
m4_ifdef([gl_FUNC_HYPOTF_IEEE], [
if test $gl_hypotf_required = ieee && test $REPLACE_HYPOTF = 0; then
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether hypotf works according to ISO C 99 with IEC 60559],
[gl_cv_func_hypotf_ieee],
[
AC_CACHE_CHECK([whether hypotf works according to ISO C 99 with IEC 60559],
[gl_cv_func_hypotf_ieee],
[
@@
-64,7
+68,13
@@
int main (int argc, char *argv[])
]])],
[gl_cv_func_hypotf_ieee=yes],
[gl_cv_func_hypotf_ieee=no],
]])],
[gl_cv_func_hypotf_ieee=yes],
[gl_cv_func_hypotf_ieee=no],
- [gl_cv_func_hypotf_ieee="guessing no"])
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_hypotf_ieee="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_hypotf_ieee="guessing no" ;;
+ esac
+ ])
LIBS="$save_LIBS"
])
case "$gl_cv_func_hypotf_ieee" in
LIBS="$save_LIBS"
])
case "$gl_cv_func_hypotf_ieee" in