| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. |
| 2 | # Local preconfigure fragment for sysdeps/arm |
| 3 | |
| 4 | case "$machine" in |
| 5 | arm*) |
| 6 | # If the compiler enables unwind tables by default, this causes |
| 7 | # problems with undefined symbols in -nostdlib link tests. To |
| 8 | # avoid this, add -fno-unwind-tables here and remove it in |
| 9 | # sysdeps/arm/configure.ac after those tests have been run. |
| 10 | if test "${CFLAGS+set}" != "set"; then |
| 11 | CFLAGS="-g -O2" |
| 12 | fi |
| 13 | CFLAGS="$CFLAGS -fno-unwind-tables" |
| 14 | |
| 15 | base_machine=arm |
| 16 | # Lets ask the compiler which ARM family we've got |
| 17 | # Unfortunately it doesn't define any flags for implementations |
| 18 | # that you might pass to -mcpu or -mtune |
| 19 | # Note if you add patterns here you must ensure that |
| 20 | # an appropriate directory exists in sysdeps/arm |
| 21 | archcppflag=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | |
| 22 | sed -n 's/^#define \(__ARM_ARCH_[0-9].*__\) .*$/\1/p'` |
| 23 | |
| 24 | case "x$archcppflag" in |
| 25 | x__ARM_ARCH_[89]*__) |
| 26 | machine=armv7 |
| 27 | AC_MSG_NOTICE([Found compiler is configured for something newer than v7 - using v7]) |
| 28 | ;; |
| 29 | |
| 30 | x__ARM_ARCH_7A__) |
| 31 | machine=armv7 |
| 32 | AC_MSG_NOTICE([Found compiler is configured for $machine]) |
| 33 | ;; |
| 34 | |
| 35 | x__ARM_ARCH_6T2__) |
| 36 | machine=armv6t2 |
| 37 | AC_MSG_NOTICE([Found compiler is configured for $machine]) |
| 38 | ;; |
| 39 | x__ARM_ARCH_6*__) |
| 40 | machine=armv6 |
| 41 | AC_MSG_NOTICE([Found compiler is configured for $machine]) |
| 42 | ;; |
| 43 | *) |
| 44 | machine=arm |
| 45 | AC_MSG_WARN([arm/preconfigure: Did not find ARM architecture type; using default]) |
| 46 | ;; |
| 47 | esac |
| 48 | |
| 49 | machine=arm/$machine |
| 50 | esac |