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| author | Bruno Haible <bruno@clisp.org> | 2012-02-29 23:42:53 +0100 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2012-02-29 23:42:53 +0100 |
| commit | a0dccde75e6a3b9c930e3577fae7a5bf9351ec09 (patch) | |
| tree | cf07ebc2e9ae200885f4d1bea63f01d712b37d3b /m4/cbrt.m4 | |
| parent | 14ad442f598655b0dad323d32c22e8b27ad6fb5c (diff) | |
| download | gnulib-a0dccde75e6a3b9c930e3577fae7a5bf9351ec09.tar.gz | |
cbrt: Provide replacement on MSVC and Minix.
* lib/math.in.h (cbrt): New declaration.
* lib/cbrt.c: New file.
* m4/cbrt.m4: New file.
* m4/math_h.m4 (gl_MATH_H): Test whether cbrt is declared.
(gl_MATH_H_DEFAULTS): Initialize GNULIB_CBRT, HAVE_CBRT.
* modules/math (Makefile.am): Substitute GNULIB_CBRT, HAVE_CBRT.
* modules/cbrt (Files): Add lib/cbrt.c, m4/cbrt.m4.
(Depends-on): Add dependencies.
(configure.ac): Arrange to compile replacement if HAVE_CBRT is 0.
* tests/test-math-c++.cc: Check the declaration of cbrt.
* doc/posix-functions/cbrt.texi: Mention that the module provides a
replacement.
Diffstat (limited to 'm4/cbrt.m4')
| -rw-r--r-- | m4/cbrt.m4 | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/m4/cbrt.m4 b/m4/cbrt.m4 new file mode 100644 index 0000000000..065f328afd --- /dev/null +++ b/m4/cbrt.m4 @@ -0,0 +1,42 @@ +# cbrt.m4 serial 1 +dnl Copyright (C) 2012 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_CBRT], +[ + AC_REQUIRE([gl_MATH_H_DEFAULTS]) + + dnl Determine CBRT_LIBM. + gl_COMMON_DOUBLE_MATHFUNC([cbrt]) + + dnl Test whether cbrt() exists. + save_LIBS="$LIBS" + LIBS="$LIBS $CBRT_LIBM" + AC_CHECK_FUNCS([cbrt]) + LIBS="$save_LIBS" + if test $ac_cv_func_cbrt = no; then + HAVE_CBRT=0 + dnl Find libraries needed to link lib/cbrt.c. + AC_REQUIRE([gl_FUNC_FABS]) + AC_REQUIRE([gl_FUNC_FREXP]) + AC_REQUIRE([gl_FUNC_LDEXP]) + CBRT_LIBM= + dnl Append $FABS_LIBM to CBRT_LIBM, avoiding gratuitous duplicates. + case " $CBRT_LIBM " in + *" $FABS_LIBM "*) ;; + *) CBRT_LIBM="$CBRT_LIBM $FABS_LIBM" ;; + esac + dnl Append $FREXP_LIBM to CBRT_LIBM, avoiding gratuitous duplicates. + case " $CBRT_LIBM " in + *" $FREXP_LIBM "*) ;; + *) CBRT_LIBM="$CBRT_LIBM $FREXP_LIBM" ;; + esac + dnl Append $LDEXP_LIBM to CBRT_LIBM, avoiding gratuitous duplicates. + case " $CBRT_LIBM " in + *" $LDEXP_LIBM "*) ;; + *) CBRT_LIBM="$CBRT_LIBM $LDEXP_LIBM" ;; + esac + fi +]) |