diff options
Diffstat (limited to 'gnulib/m4/strtod.m4')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/m4/strtod.m4 | 90 |
2 files changed, 90 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 4fc10daa05477586fea99b6b3ca02a87d1102fa diff --git a/gnulib/m4/strtod.m4 b/gnulib/m4/strtod.m4 new file mode 100644 index 00000000..6b2d7317 --- /dev/null +++ b/gnulib/m4/strtod.m4 @@ -0,0 +1,90 @@ +# strtod.m4 serial 13 +dnl Copyright (C) 2002-2003, 2006-2010 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_STRTOD], +[ + AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) + AC_FUNC_STRTOD + dnl Note: AC_FUNC_STRTOD does AC_LIBOBJ([strtod]). + if test $ac_cv_func_strtod = no; then + HAVE_STRTOD=0 + REPLACE_STRTOD=1 + gl_PREREQ_STRTOD + else + AC_CACHE_CHECK([whether strtod obeys C99], [gl_cv_func_strtod_works], + [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +#include <stdlib.h> +#include <math.h> +#include <errno.h> +/* Compare two numbers with ==. + This is a separate function because IRIX 6.5 "cc -O" miscompiles an + 'x == x' test. */ +static int +numeric_equal (double x, double y) +{ + return x == y; +} +]], [[ + { + /* Older glibc and Cygwin mis-parse "-0x". */ + const char *string = "-0x"; + char *term; + double value = strtod (string, &term); + double zero = 0.0; + if (1.0 / value != -1.0 / zero || term != (string + 2)) + return 1; + } + { + /* Many platforms do not parse hex floats. */ + const char *string = "0XaP+1"; + char *term; + double value = strtod (string, &term); + if (value != 20.0 || term != (string + 6)) + return 1; + } + { + /* Many platforms do not parse infinities. HP-UX 11.31 parses inf, + but mistakenly sets errno. */ + const char *string = "inf"; + char *term; + double value; + errno = 0; + value = strtod (string, &term); + if (value != HUGE_VAL || term != (string + 3) || errno) + return 1; + } + { + /* glibc 2.7 and cygwin 1.5.24 misparse "nan()". */ + const char *string = "nan()"; + char *term; + double value = strtod (string, &term); + if (numeric_equal (value, value) || term != (string + 5)) + return 1; + } + { + /* darwin 10.6.1 misparses "nan(". */ + const char *string = "nan("; + char *term; + double value = strtod (string, &term); + if (numeric_equal (value, value) || term != (string + 3)) + return 1; + } +]])], + [gl_cv_func_strtod_works=yes], + [gl_cv_func_strtod_works=no], + [gl_cv_func_strtod_works="guessing no"])]) + if test "$gl_cv_func_strtod_works" != yes; then + REPLACE_STRTOD=1 + gl_PREREQ_STRTOD + dnl Use undocumented macro to set POW_LIB correctly. + _AC_LIBOBJ_STRTOD + fi + fi +]) + +# Prerequisites of lib/strtod.c. +# The need for pow() is already handled by AC_FUNC_STRTOD. +AC_DEFUN([gl_PREREQ_STRTOD], [:]) |