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29 lines
806 B
Plaintext
29 lines
806 B
Plaintext
# powf.m4 serial 2
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dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_POWF],
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[
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AC_REQUIRE([gl_MATH_H_DEFAULTS])
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AC_REQUIRE([gl_FUNC_POW])
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dnl Persuade glibc <math.h> to declare powf().
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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dnl Test whether powf() exists. Assume that powf(), if it exists, is
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dnl defined in the same library as pow().
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save_LIBS="$LIBS"
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LIBS="$LIBS $POW_LIBM"
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AC_CHECK_FUNCS([powf])
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LIBS="$save_LIBS"
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if test $ac_cv_func_powf = yes; then
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POWF_LIBM="$POW_LIBM"
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else
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HAVE_POWF=0
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POWF_LIBM="$POW_LIBM"
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fi
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AC_SUBST([POWF_LIBM])
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])
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