kc3-lang/gnulib/m4/expf.m4

• Show log

  Commit

• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

Download

• m4/expf.m4

• # expf.m4 serial 3
  dnl Copyright (C) 2011-2023 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.
  
  AC_DEFUN([gl_FUNC_EXPF],
  [
    AC_REQUIRE([gl_MATH_H_DEFAULTS])
    AC_REQUIRE([gl_FUNC_EXP])
  
    dnl Persuade glibc <math.h> to declare expf().
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
  
    dnl Test whether expf() exists. Assume that expf(), if it exists, is
    dnl defined in the same library as exp().
    save_LIBS="$LIBS"
    LIBS="$LIBS $EXP_LIBM"
    AC_CHECK_FUNCS([expf])
    LIBS="$save_LIBS"
    if test $ac_cv_func_expf = yes; then
      EXPF_LIBM="$EXP_LIBM"
    else
      HAVE_EXPF=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_expf, not expf.
      AC_CHECK_DECLS([expf], [REPLACE_EXPF=1], , [[#include <math.h>]])
      EXPF_LIBM="$EXP_LIBM"
    fi
    AC_SUBST([EXPF_LIBM])
  ])
  

Download