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configure: Do not build libfdt if not required 

We only require libfdt for system emulation, in a small set
of architecture:

4077  # fdt support is mandatory for at least some target architectures,
4078  # so insist on it if we're building those system emulators.
4079  fdt_required=no
4080  for target in $target_list; do
4081    case $target in
4082      aarch64*-softmmu|arm*-softmmu|ppc*-softmmu|microblaze*-softmmu|mips64el-softmmu|riscv*-softmmu)
4083        fdt_required=yes

Do not build libfdt if we did not manually specified --enable-fdt,
or have one of the platforms that require it in our target list.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200118140619.26333-2-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2020-01-18 15:06:14 +01:00 committed by Paolo Bonzini
parent 7ddd4ceaac
commit 7ba4a4d328
1 changed files with 2 additions and 0 deletions
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configure vendored
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@ -4095,6 +4095,8 @@ if test "$fdt_required" = "yes"; then
"targets which need it (by specifying a cut down --target-list)."
fi
fdt=yes
elif test "$fdt" != "yes" ; then
fdt=no
fi
if test "$fdt" != "no" ; then