diff options
Diffstat (limited to 'm4/strtoimax.m4')
| -rw-r--r-- | m4/strtoimax.m4 | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/m4/strtoimax.m4 b/m4/strtoimax.m4 new file mode 100644 index 0000000..4958e3d --- /dev/null +++ b/m4/strtoimax.m4 @@ -0,0 +1,88 @@ +# strtoimax.m4 serial 16 +dnl Copyright (C) 2002-2004, 2006, 2009-2020 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_STRTOIMAX], +[ + AC_REQUIRE([gl_INTTYPES_H_DEFAULTS]) + + dnl On OSF/1 5.1 with cc, this function is declared but not defined. + AC_CHECK_FUNCS_ONCE([strtoimax]) + AC_CHECK_DECLS_ONCE([strtoimax]) + if test "$ac_cv_have_decl_strtoimax" != yes; then + HAVE_DECL_STRTOIMAX=0 + fi + + if test "$ac_cv_func_strtoimax" = yes; then + HAVE_STRTOIMAX=1 + dnl On AIX 5.1, strtoimax() fails for values outside the 'int' range. + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether strtoimax works], [gl_cv_func_strtoimax], + [AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#include <errno.h> +#include <string.h> +#include <inttypes.h> +int main () +{ + if (sizeof (intmax_t) > sizeof (int)) + { + const char *s = "4294967295"; + char *p; + intmax_t res; + errno = 0; + res = strtoimax (s, &p, 10); + if (p != s + strlen (s)) + return 1; + if (errno != 0) + return 2; + if (res != (intmax_t) 65535 * (intmax_t) 65537) + return 3; + } + else + { + const char *s = "2147483647"; + char *p; + intmax_t res; + errno = 0; + res = strtoimax (s, &p, 10); + if (p != s + strlen (s)) + return 1; + if (errno != 0) + return 2; + if (res != 2147483647) + return 3; + } + return 0; +} +]])], + [gl_cv_func_strtoimax=yes], + [gl_cv_func_strtoimax=no], + [case "$host_os" in + # Guess no on AIX 5. + aix5*) gl_cv_func_strtoimax="guessing no" ;; + # Guess yes on native Windows. + mingw*) gl_cv_func_strtoimax="guessing yes" ;; + # Guess yes otherwise. + *) gl_cv_func_strtoimax="guessing yes" ;; + esac + ]) + ]) + case "$gl_cv_func_strtoimax" in + *no) REPLACE_STRTOIMAX=1 ;; + esac + else + if test "$ac_cv_have_decl_strtoimax" = yes; then + # HP-UX 11.11 has "#define strtoimax(...) ..." but no function. + REPLACE_STRTOIMAX=1 + fi + HAVE_STRTOIMAX=0 + fi +]) + +# Prerequisites of lib/strtoimax.c. +AC_DEFUN([gl_PREREQ_STRTOIMAX], [ + AC_CHECK_DECLS([strtoll]) +]) |