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configure: Fix creation of symbolic links for MinGW toolchain

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The MinGW toolchain on w32/w64 hosts does not create symbolic links,
but implements 'ln -s' similar to 'cp -r'.

In incremental out of tree builds, this resulted in files which
were not updated when their counterparts in the QEMU source tree
changed. Especially for Makefile* this happened very often.

With this patch, the 'symlinked' files are now always updated for
out of tree builds. Similar code was already used for the symbolic
link of libcacard/Makefile.

The symlink macro always removes the target before it is created
again, therefore the rm command for libcacard/Makefile was redundant
and is removed now.

Macro symlink is also used with directories. To remove them on w32
hosts, a recursive rm is needed.

v2:
Quote arguments in shell function symlink, and also quote any argument
which is passed to symlink and which contains macros. This should reduce
the chance of accidents caused by rm -rf.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This commit is contained in:
Stefan Weil 2012-03-19 13:20:47 +01:00 committed by Stefan Hajnoczi
parent 42fe1c245f
commit 72b8b5a19a
1 changed files with 10 additions and 11 deletions
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21
configure vendored
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@ -41,8 +41,8 @@ compile_prog() {
# symbolically link $1 to $2. Portable version of "ln -sf".
symlink() {
rm -f $2
ln -s $1 $2
rm -rf "$2"
ln -s "$1" "$2"
}
# check whether a command is available to this shell (may be either an
@ -3435,7 +3435,7 @@ fi
for d in libdis libdis-user; do
mkdir -p $d
symlink $source_path/Makefile.dis $d/Makefile
symlink "$source_path/Makefile.dis" "$d/Makefile"
echo > $d/config.mak
done
@ -3444,13 +3444,13 @@ if test "$linux" = "yes" ; then
mkdir -p linux-headers
case "$cpu" in
i386|x86_64)
symlink $source_path/linux-headers/asm-x86 linux-headers/asm
symlink "$source_path/linux-headers/asm-x86" linux-headers/asm
;;
ppcemb|ppc|ppc64)
symlink $source_path/linux-headers/asm-powerpc linux-headers/asm
symlink "$source_path/linux-headers/asm-powerpc" linux-headers/asm
;;
s390x)
symlink $source_path/linux-headers/asm-s390 linux-headers/asm
symlink "$source_path/linux-headers/asm-s390" linux-headers/asm
;;
esac
fi
@ -3515,7 +3515,7 @@ mkdir -p $target_dir/kvm
if test "$target" = "arm-linux-user" -o "$target" = "armeb-linux-user" -o "$target" = "arm-bsd-user" -o "$target" = "armeb-bsd-user" ; then
mkdir -p $target_dir/nwfpe
fi
symlink $source_path/Makefile.target $target_dir/Makefile
symlink "$source_path/Makefile.target" "$target_dir/Makefile"
echo "# Automatically generated by configure - do not modify" > $config_target_mak
@ -3958,7 +3958,7 @@ do
done
mkdir -p $DIRS
for f in $FILES ; do
if [ -e "$source_path/$f" ] && ! [ -e "$f" ]; then
if [ -e "$source_path/$f" ] && [ "$source_path" != `pwd` ]; then
symlink "$source_path/$f" "$f"
fi
done
@ -3981,7 +3981,7 @@ for hwlib in 32 64; do
mkdir -p $d
mkdir -p $d/ide
mkdir -p $d/usb
symlink $source_path/Makefile.hw $d/Makefile
symlink "$source_path/Makefile.hw" "$d/Makefile"
mkdir -p $d/9pfs
echo "QEMU_CFLAGS+=-DTARGET_PHYS_ADDR_BITS=$hwlib" > $d/config.mak
done
@ -3989,7 +3989,6 @@ done
if [ "$source_path" != `pwd` ]; then
# out of tree build
mkdir -p libcacard
rm -f libcacard/Makefile
symlink "$source_path/libcacard/Makefile" libcacard/Makefile
fi
@ -3997,7 +3996,7 @@ d=libuser
mkdir -p $d
mkdir -p $d/trace
mkdir -p $d/qom
symlink $source_path/Makefile.user $d/Makefile
symlink "$source_path/Makefile.user" "$d/Makefile"
if test "$docs" = "yes" ; then
mkdir -p QMP