Mercurial > gnulib
view m4/sinhf.m4 @ 40214:452ab00796c7
Fix undefined behaviour.
* lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to
'unsigned int', to avoid shift operations on 'int'.
* lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size.
* tests/test-count-leading-zeros.c (main): Use a random number that has
as many bits as TYPE, not only 2*15 or 2*31 bits.
* tests/test-count-trailing-zeros.c (main): Likewise.
* tests/test-count-one-bits.c (main): Likewise.
* tests/test-memmem.c: Don't include "null-ptr.h".
(main): Use zerosize_ptr() instead of null_ptr().
* modules/memmem-tests (Files): Remove tests/null-ptr.h.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Sat, 09 Mar 2019 20:32:25 +0100 |
| parents | b06060465f09 |
| children |
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# sinhf.m4 serial 3 dnl Copyright (C) 2011-2019 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_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(). save_LIBS="$LIBS" LIBS="$LIBS $SINH_LIBM" AC_CHECK_FUNCS([sinhf]) LIBS="$save_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]) ])