diff options
| -rw-r--r-- | acinclude.m4 | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 91131273a..778917c2d 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -164,24 +164,33 @@ if test "$ac_cv_type_intmax_t" = yes; then if test "$mpfr_cv_have_intmax_max" = "yes"; then AC_DEFINE(MPFR_HAVE_INTMAX_MAX,1,[Define if you have a working INTMAX_MAX.]) fi - AC_CACHE_CHECK([for working 'j' printf length modifier], - mpfr_cv_have_printf_j, [ + AC_CACHE_CHECK([for working printf length modifier for intmax_t], + mpfr_cv_printf_maxlm, [ saved_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS -I$srcdir/src" - AC_RUN_IFELSE([AC_LANG_PROGRAM([[ + for modifier in j ll l + do + AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +#include <stdio.h> #include <string.h> #include "mpfr-intmax.h" ]],[[ char s[64]; - sprintf (s, "%jd %ju", (intmax_t) -17, (uintmax_t) 42); + sprintf (s, "%${modifier}d %${modifier}u", + (intmax_t) -17, (uintmax_t) 42); return strcmp (s, "-17 42") != 0; ]])], - mpfr_cv_have_printf_j=yes, mpfr_cv_have_printf_j=no) + mpfr_cv_printf_maxlm=${modifier}; break, + mpfr_cv_printf_maxlm=none, +dnl We assume that j is working when cross-compiling. + mpfr_cv_printf_maxlm=j; break + ) + done CPPFLAGS="$saved_CPPFLAGS" ]) - if test "$mpfr_cv_have_printf_j" = "yes"; then - AC_DEFINE(MPFR_HAVE_PRINTF_J,1, - [Define if you have a working 'j' printf length modifier]) + if test "$mpfr_cv_printf_maxlm" != "none"; then + AC_DEFINE_UNQUOTED([MPFR_PRINTF_MAXLM],["$mpfr_cv_printf_maxlm"], + [Define to a working printf length modifier for intmax_t]) fi fi |