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-rw-r--r--m4/limits-h.m423
1 files changed, 17 insertions, 6 deletions
diff --git a/m4/limits-h.m4 b/m4/limits-h.m4
index ca0294e..1825328 100644
--- a/m4/limits-h.m4
+++ b/m4/limits-h.m4
@@ -1,6 +1,6 @@
dnl Check whether limits.h has needed features.
-dnl Copyright 2016-2023 Free Software Foundation, Inc.
+dnl Copyright 2016-2024 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.
@@ -28,11 +28,22 @@ AC_DEFUN_ONCE([gl_LIMITS_H],
]])],
[gl_cv_header_limits_width=yes],
[gl_cv_header_limits_width=no])])
- if test "$gl_cv_header_limits_width" = yes; then
- GL_GENERATE_LIMITS_H=false
- else
- GL_GENERATE_LIMITS_H=true
- fi
+ GL_GENERATE_LIMITS_H=true
+ AS_IF([test "$gl_cv_header_limits_width" = yes],
+ [AC_CACHE_CHECK([whether limits.h has SSIZE_MAX],
+ [gl_cv_header_limits_ssize_max],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_SOURCE(
+ [[#include <limits.h>
+ #ifndef SSIZE_MAX
+ #error "SSIZE_MAX is not defined"
+ #endif
+ ]])],
+ [gl_cv_header_limits_ssize_max=yes],
+ [gl_cv_header_limits_ssize_max=no])])
+ if test "$gl_cv_header_limits_ssize_max" = yes; then
+ GL_GENERATE_LIMITS_H=false
+ fi])
])
dnl Unconditionally enables the replacement of <limits.h>.