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Diffstat (limited to 'gnulib-m4/limits-h.m4')
| -rw-r--r-- | gnulib-m4/limits-h.m4 | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gnulib-m4/limits-h.m4 b/gnulib-m4/limits-h.m4 new file mode 100644 index 0000000..31fdf0a --- /dev/null +++ b/gnulib-m4/limits-h.m4 @@ -0,0 +1,31 @@ +dnl Check whether limits.h has needed features. + +dnl Copyright 2016 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. + +dnl From Paul Eggert. + +AC_DEFUN_ONCE([gl_LIMITS_H], +[ + gl_CHECK_NEXT_HEADERS([limits.h]) + + AC_CACHE_CHECK([whether limits.h has ULLONG_WIDTH etc.], + [gl_cv_header_limits_width], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([[#ifndef __STDC_WANT_IEC_60559_BFP_EXT__ + #define __STDC_WANT_IEC_60559_BFP_EXT__ 1 + #endif + #include <limits.h> + int ullw = ULLONG_WIDTH;]])], + [gl_cv_header_limits_width=yes], + [gl_cv_header_limits_width=no])]) + if test "$gl_cv_header_limits_width" = yes; then + LIMITS_H= + else + LIMITS_H=limits.h + fi + AC_SUBST([LIMITS_H]) + AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"]) +]) |