On Thu, 23 Apr 2015, Bin.Cheng wrote: > Hi, > In libstdc++ testsuite, I noticed that macro _GLIBCXX_RES_LIMITS is > checked/set by GLIBCXX_CHECK_SETRLIMIT, which is further guarded by > GLIBCXX_IS_NATIVE as below: > > AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [ > if $GLIBCXX_IS_NATIVE ; then > # Do checks for resource limit functions. > GLIBCXX_CHECK_SETRLIMIT > > # Look for setenv, so that extended locale tests can be performed. > GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv) > fi > > For cross toolchain like arm-linux, _GLIBCXX_RES_LIMITS isn't set. As > a result, function __gnu_test::set_file_limit is actually nullified > and causing case 27_io/fpos/14775.cc failed. > > My question is why we want to guard the check with GLIBCXX_IS_NATIVE? > Could we check it directly, if it's not supported, it's going to fail > and undef the macro anyway? > > > Thanks, > bin >
Good question. I'm CC:ing the libstdc++ list, maybe that'll bring an answer before another 1.5 months. brgds, H-P
