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Diffstat (limited to 'gnulib/m4/ceilf.m4')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/m4/ceilf.m4 | 104 |
2 files changed, 104 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/m4/ceilf.m4 b/gnulib/m4/ceilf.m4 new file mode 100644 index 0000000..59f52f5 --- /dev/null +++ b/gnulib/m4/ceilf.m4 @@ -0,0 +1,104 @@ +# ceilf.m4 serial 12 +dnl Copyright (C) 2007, 2009-2011 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_CEILF], +[ + m4_divert_text([DEFAULTS], [gl_ceilf_required=plain]) + AC_REQUIRE([gl_MATH_H_DEFAULTS]) + dnl Persuade glibc <math.h> to declare ceilf(). + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + dnl Test whether ceilf() is declared. + AC_CHECK_DECLS([ceilf], , , [[#include <math.h>]]) + if test "$ac_cv_have_decl_ceilf" = yes; then + dnl Test whether ceilf() can be used without libm. + gl_FUNC_CEILF_LIBS + if test "$CEILF_LIBM" = "?"; then + dnl Sun C 5.0 on Solaris declares ceilf() and has it in the system-wide + dnl libm.so, but not in the libm.so that the compiler uses. + REPLACE_CEILF=1 + fi + m4_ifdef([gl_FUNC_CEILF_IEEE], [ + if test $gl_ceilf_required = ieee && test $REPLACE_CEILF = 0; then + AC_CACHE_CHECK([whether ceilf works according to ISO C 99 with IEC 60559], + [gl_cv_func_ceilf_ieee], + [ + save_LIBS="$LIBS" + LIBS="$LIBS $CEILF_LIBM" + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#ifndef __NO_MATH_INLINES +# define __NO_MATH_INLINES 1 /* for glibc */ +#endif +#include <math.h> +]gl_FLOAT_MINUS_ZERO_CODE[ +]gl_FLOAT_SIGNBIT_CODE[ +static float dummy (float f) { return 0; } +int main (int argc, char *argv[]) +{ + float (*my_ceilf) (float) = argc ? ceilf : dummy; + int result = 0; + /* Test whether ceilf (-0.0f) is -0.0f. */ + if (signbitf (minus_zerof) && !signbitf (my_ceilf (minus_zerof))) + result |= 1; + /* Test whether ceilf (-0.3f) is -0.0f. */ + if (signbitf (-0.3f) && !signbitf (my_ceilf (-0.3f))) + result |= 2; + return result; +} + ]])], + [gl_cv_func_ceilf_ieee=yes], + [gl_cv_func_ceilf_ieee=no], + [gl_cv_func_ceilf_ieee="guessing no"]) + LIBS="$save_LIBS" + ]) + case "$gl_cv_func_ceilf_ieee" in + *yes) ;; + *) REPLACE_CEILF=1 ;; + esac + fi + ]) + else + HAVE_DECL_CEILF=0 + fi + if test $HAVE_DECL_CEILF = 0 || test $REPLACE_CEILF = 1; then + dnl No libraries are needed to link lib/ceilf.c. + CEILF_LIBM= + fi + AC_SUBST([CEILF_LIBM]) +]) + +# Determines the libraries needed to get the ceilf() function. +# Sets CEILF_LIBM. +AC_DEFUN([gl_FUNC_CEILF_LIBS], +[ + gl_CACHE_VAL_SILENT([gl_cv_func_ceilf_libm], [ + gl_cv_func_ceilf_libm=? + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#ifndef __NO_MATH_INLINES + # define __NO_MATH_INLINES 1 /* for glibc */ + #endif + #include <math.h> + float x;]], + [[x = ceilf(x);]])], + [gl_cv_func_ceilf_libm=]) + if test "$gl_cv_func_ceilf_libm" = "?"; then + save_LIBS="$LIBS" + LIBS="$LIBS -lm" + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#ifndef __NO_MATH_INLINES + # define __NO_MATH_INLINES 1 /* for glibc */ + #endif + #include <math.h> + float x;]], + [[x = ceilf(x);]])], + [gl_cv_func_ceilf_libm="-lm"]) + LIBS="$save_LIBS" + fi + ]) + CEILF_LIBM="$gl_cv_func_ceilf_libm" +]) |