Mercurial > gnulib
view m4/strtoimax.m4 @ 16328:e8f946a4eba3
strtoimax: eliminate need for stdint.h, inttypes.h checks
* m4/strtoimax.m4 (gl_FUNC_STRTOIMAX): Don't use
gl_AC_HEADER_STDINT_H or gl_AC_HEADER_INTTYPES_H. This reduces
the prerequisites for a recently-introduced strtoimax test.
I guess this might cause strtoimax to be replaced when not
strictly necessary on older hosts, but this shouldn't introduce
any bugs and it should make Emacs 'configure' faster on typical
modern hosts. Problem discovered when importing the latest gnulib
to an Emacs test version.
* modules/strtoimax (Files): Remove m4/stdint_h.m4, m4/inttypes_h.m4.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Sat, 28 Jan 2012 13:31:06 -0800 |
parents | 32a96da07efe |
children | e542fd46ad6f |
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# strtoimax.m4 serial 13 dnl Copyright (C) 2002-2004, 2006, 2009-2012 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_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 otherwise. *) gl_cv_func_strtoimax="guessing yes" ;; esac ]) ]) case "$gl_cv_func_strtoimax" in *no) REPLACE_STRTOIMAX=1 ;; esac else HAVE_STRTOIMAX=0 fi ]) # Prerequisites of lib/strtoimax.c. AC_DEFUN([gl_PREREQ_STRTOIMAX], [ AC_CHECK_DECLS([strtoll]) AC_REQUIRE([AC_TYPE_LONG_LONG_INT]) ])