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# gl_USE_SYSTEM_EXTENSIONS
# ------------------------
# Enable extensions on systems that normally disable them,
# typically due to standards-conformance issues.
AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS], [
AC_REQUIRE([AC_AIX])
AC_REQUIRE([AC_GNU_SOURCE])
AC_REQUIRE([AC_MINIX])
AH_VERBATIM([__EXTENSIONS__],
[/* Enable extensions on Solaris. */
#ifndef __EXTENSIONS__
# undef __EXTENSIONS__
#endif])
AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
AC_DEFINE([__EXTENSIONS__])
])
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