2013-03-11 16:26:43 +00:00
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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local preconfigure fragment for sysdeps/arm
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case "$machine" in
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arm*)
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2014-07-16 22:18:36 +00:00
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# If the compiler enables unwind tables by default, this causes
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# problems with undefined symbols in -nostdlib link tests. To
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# avoid this, add -fno-unwind-tables here and remove it in
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# sysdeps/arm/configure.ac after those tests have been run.
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if test "${CFLAGS+set}" != "set"; then
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CFLAGS="-g -O2"
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fi
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CFLAGS="$CFLAGS -fno-unwind-tables"
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2013-03-11 16:26:43 +00:00
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base_machine=arm
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# Lets ask the compiler which ARM family we've got
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# Unfortunately it doesn't define any flags for implementations
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# that you might pass to -mcpu or -mtune
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# Note if you add patterns here you must ensure that
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# an appropriate directory exists in sysdeps/arm
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archcppflag=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define \(__ARM_ARCH_[0-9].*__\) .*$/\1/p'`
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case "x$archcppflag" in
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x__ARM_ARCH_[89]*__)
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machine=armv7
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AC_MSG_NOTICE([Found compiler is configured for something newer than v7 - using v7])
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;;
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x__ARM_ARCH_7A__)
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machine=armv7
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AC_MSG_NOTICE([Found compiler is configured for $machine])
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;;
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x__ARM_ARCH_6T2__)
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machine=armv6t2
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AC_MSG_NOTICE([Found compiler is configured for $machine])
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;;
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x__ARM_ARCH_6*__)
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machine=armv6
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AC_MSG_NOTICE([Found compiler is configured for $machine])
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;;
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*)
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machine=arm
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AC_MSG_WARN([arm/preconfigure: Did not find ARM architecture type; using default])
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;;
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esac
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machine=arm/$machine
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esac
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