GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. # Local preconfigure fragment for sysdeps/arm case "$machine" in arm*) AC_TRY_COMPILE([ #if !__ARM_EABI__ #error #endif], [], [], [AC_MSG_ERROR([Old ABI no longer supported])]) # If the compiler enables unwind tables by default, this causes # problems with undefined symbols in -nostdlib link tests. To # avoid this, add -fno-unwind-tables here and remove it in # sysdeps/arm/configure.ac after those tests have been run. if test "${CFLAGS+set}" != "set"; then CFLAGS="-g -O2" fi CFLAGS="$CFLAGS -fno-unwind-tables" base_machine=arm # Lets ask the compiler which ARM family we've got # Unfortunately it doesn't define any flags for implementations # that you might pass to -mcpu or -mtune # Note if you add patterns here you must ensure that # an appropriate directory exists in sysdeps/arm archcppflag=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | sed -n 's/^#define \(__ARM_ARCH_[0-9].*__\) .*$/\1/p'` case "x$archcppflag" in x__ARM_ARCH_[89]*__) machine=armv7 AC_MSG_NOTICE([Found compiler is configured for something newer than v7 - using v7]) ;; x__ARM_ARCH_7A__) machine=armv7 AC_MSG_NOTICE([Found compiler is configured for $machine]) ;; x__ARM_ARCH_6T2__) machine=armv6t2 AC_MSG_NOTICE([Found compiler is configured for $machine]) ;; x__ARM_ARCH_6*__) machine=armv6 AC_MSG_NOTICE([Found compiler is configured for $machine]) ;; *) machine=arm AC_MSG_WARN([arm/preconfigure: Did not find ARM architecture type; using default]) ;; esac machine=arm/$machine esac