On Wed, Nov 22, 2017 at 11:37:04AM +0100, Felix von Leitner wrote: > > > Are you sure about this? > > It's _XOPEN_SOURCE, but as configure.ac contains AC_USE_SYSTEM_EXTENSIONS, > > I suppose _GNU_SOURCE is defined anyway. > > I do get the symbol when I define _XOPEN_SOURCE: > > $ printf "#include <limits.h>\\nIOV_MAX" | arm-linux-gnueabi-gcc > -D_XOPEN_SOURCE -E - > > Something else must be broken here. > Not sure what though.
AC_USE_SYSTEM_EXTENSIONS normally causes the following code to be added to config.h file: /* Enable GNU extensions on systems that have them. */ #ifndef _GNU_SOURCE # define _GNU_SOURCE 1 #endif -- ldv
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