mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-05-02 21:10:27 +02:00
49114fd43d
This updates Gnulib to v0.0-4889-ge375fe3. * m4/gnulib-cache.m4: Add `accept', `bind', `close', `connect', `getpeername', `getsockname', `getsockopt', `listen', `malloc', `malloca', `recv', `recvfrom', `send', `sendto', `setsockopt', `shutdown', `socket', and `sockets', requested by Jan Nieuwenhuizen <janneke-list@xs4all.nl> for cross-MinGW32 builds. Add `trunc', requested by Mark H Weaver <mhw@netris.org>.
31 lines
1 KiB
Text
31 lines
1 KiB
Text
# check-math-lib.m4 serial 3
|
|
dnl Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc.
|
|
dnl This file is free software; the Free Software Foundation
|
|
dnl gives unlimited permission to copy and/or distribute it,
|
|
dnl with or without modifications, as long as this notice is preserved.
|
|
dnl
|
|
dnl gl_CHECK_MATH_LIB (VARIABLE, EXPRESSION)
|
|
dnl
|
|
dnl Sets the shell VARIABLE according to the libraries needed by EXPRESSION
|
|
dnl to compile and link: to the empty string if no extra libraries are needed,
|
|
dnl to "-lm" if -lm is needed, or to "missing" if it does not compile and
|
|
dnl link either way.
|
|
dnl
|
|
dnl Example: gl_CHECK_MATH_LIB([ROUNDF_LIBM], [x = roundf (x);])
|
|
AC_DEFUN([gl_CHECK_MATH_LIB], [
|
|
save_LIBS=$LIBS
|
|
$1=missing
|
|
for libm in "" "-lm"; do
|
|
LIBS="$save_LIBS $libm"
|
|
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
|
|
#ifndef __NO_MATH_INLINES
|
|
# define __NO_MATH_INLINES 1 /* for glibc */
|
|
#endif
|
|
#include <math.h>
|
|
double x;]],
|
|
[$2])],
|
|
[$1=$libm
|
|
break])
|
|
done
|
|
LIBS=$save_LIBS
|
|
])
|