diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 6018a0a8bc..7c2a8c9ea1 100644 --- a/configure.in +++ b/configure.in @@ -1094,6 +1094,55 @@ main() ac_cv_c_inline=no], [solaris*], [ LIBS="-lm $LIBS" ac_cv_func_vfork=no + AC_MSG_CHECKING(whether _XOPEN_SOURCE is already given) + AC_TRY_COMPILE([#include <unistd.h> + #ifndef _XOPEN_SOURCE + #error _XOPEN_SOURCE is not defined + #endif + ], [], + [given_xopen_source=yes], [given_xopen_source=no]) + AC_MSG_RESULT($given_xopen_source) + if test $given_xopen_source = no; then + AC_MSG_CHECKING(appropriate _XOPEN_SOURCE value to define) + define_xopen_source="" + if test x"$define_xopen_source" = x; then + AC_TRY_COMPILE([ + #define _XOPEN_SOURCE 700 + #include <unistd.h> + #ifndef _XPG7 + #error _XPG7 should be defined by _XOPEN_SOURCE=700 + #endif + ], [], + [define_xopen_source=700], []) + fi + if test x"$define_xopen_source" = x; then + AC_TRY_COMPILE([ + #define _XOPEN_SOURCE 600 + #include <unistd.h> + #ifndef _XPG6 + #error _XPG6 should be defined by _XOPEN_SOURCE=600 + #endif + ], [], + [define_xopen_source=600], []) + fi + if test x"$define_xopen_source" = x; then + AC_TRY_COMPILE([ + #define _XOPEN_SOURCE 500 + #include <unistd.h> + #ifndef _XPG5 + #error _XPG5 should be defined by _XOPEN_SOURCE=500 + #endif + ], [], + [define_xopen_source=500], []) + fi + if test x"$define_xopen_source" = x; then + define_xopen_source=no + fi + AC_MSG_RESULT($define_xopen_source) + if test x"$define_xopen_source" != xno; then + RUBY_APPEND_OPTIONS(CPPFLAGS, -D_XOPEN_SOURCE=$define_xopen_source) + fi + fi ], [beos*|haiku*], [ ac_cv_func_link=no |