35 lines
1.1 KiB
Plaintext
35 lines
1.1 KiB
Plaintext
# sinhf.m4
|
|
# serial 4
|
|
dnl Copyright (C) 2011-2024 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 offered as-is, without any warranty.
|
|
|
|
AC_DEFUN([gl_FUNC_SINHF],
|
|
[
|
|
AC_REQUIRE([gl_MATH_H_DEFAULTS])
|
|
AC_REQUIRE([gl_FUNC_SINH])
|
|
|
|
dnl Persuade glibc <math.h> to declare sinhf().
|
|
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
|
|
|
dnl Test whether sinhf() exists. Assume that sinhf(), if it exists, is
|
|
dnl defined in the same library as sinh().
|
|
saved_LIBS="$LIBS"
|
|
LIBS="$LIBS $SINH_LIBM"
|
|
AC_CHECK_FUNCS([sinhf])
|
|
LIBS="$saved_LIBS"
|
|
if test $ac_cv_func_sinhf = yes; then
|
|
SINHF_LIBM="$SINH_LIBM"
|
|
else
|
|
HAVE_SINHF=0
|
|
dnl If the function is declared but does not appear to exist, it may be
|
|
dnl defined as an inline function. In order to avoid a conflict, we have
|
|
dnl to define rpl_sinhf, not sinhf.
|
|
AC_CHECK_DECLS([sinhf], [REPLACE_SINHF=1], , [[#include <math.h>]])
|
|
SINHF_LIBM="$SINH_LIBM"
|
|
fi
|
|
AC_SUBST([SINHF_LIBM])
|
|
])
|